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Statistical bulletin: Construction Output, October and New Orders, Q3 2013 This product is designated as National Statistics

Released: 13 December 2013 Download PDF

Key Points

  • ONS estimates that in October 2013 the volume of monthly construction output increased by 5.3% when compared with October 2012. There were increases in both new work (up by 5.1%) and repair and maintenance (up by 5.6%).
  • Construction output grew 2.2% in October 2013 when compared with September 2013 with increases in both new work and repair and maintenance of 2.4% and 2.0% respectively.
  • Comparing the month on month estimates in October, new work rose 2.4%, mainly due to strong growths in both the new housing and infrastructure sectors of 5.8% and 7.5%. The 2.0% increase in repair and maintenance was attributable to the 3.9% increase in non-housing repair and maintenance as housing repair showed no growth in October.
  • In the three months from August to October 2013, construction output has increased by 2.5% with growth of 2.8% in new work and 2.1% in repair and maintenance, when compared with the three previous months, May to July.
  • Within the all new work sector, private industrial fell 5.8% in October 2013 when compared with September 2013 and is now estimated to be at its lowest level since the series began in January 2010. New orders data for private industrial, however, show an increase of 31.8% for planned projects.
  • New orders estimates in this bulletin and the associated dataset are based on data supplied by Barbour ABI. Additional information can be found in the background notes section of this bulletin.
  • New Orders in the Construction Industry in Q3 2013 is estimated to be 0.2% lower when compared with Q2 2013 primarily due to an £250 million (11.1%) fall in public other new work. This fall in public other new work was partially offset by a £200 million (31.8%) increase in private industrial other new work. Within the other new work sector only private industrial other new work showed a rise during this period.
  • When comparing Q3 with the same quarter a year ago new orders have shown growth of 17.8%, an increase of almost £2 billion. The year on year rise in new orders was due to a £1.2 billion (41.6%) increase in new housing and a £600 million (21.3%) increase in private commercial other new work. The only sub-sector to show negative growth over this period was public other new work, which is estimated to have fallen 3.9%.

Introduction

Construction output estimates are a short term indicator of construction output by the private sector and public corporations within Great Britain and are produced from a monthly survey of 8,000 businesses in Great Britain. The estimates are produced and published at current prices (including inflationary price effects) and at chained volume estimates (with inflationary effects removed) both seasonally adjusted and non-seasonally adjusted.

New orders in the construction industry estimates are a short term indicator of construction contracts for new construction work awarded to main contractors by clients in both the public and private sectors within the UK. The estimates are produced and published both seasonally and non-seasonally adjusted at current prices (including inflationary price effects) and at constant prices (with inflationary effects removed).

Detailed estimates along with a longer run of time series data are available to download in the Construction Output, October and New Orders Q3 2013 tables.

Further details on the newly published monthly seasonally adjusted series and the chained volume measures can be found in the ‘What’s new’ section of the output background notes.

The ‘Definitions and explanations’ section in the background notes of this bulletin includes additional information on items contained in this release.

Economic Context

Construction output is a major component in the production approach to measuring gross domestic product (GDP), accounting for 6.3% of total GDP, based on 2010 prices. Due to the high value of construction in GDP and its stand alone status as a key economic indicator, the construction estimate is widely used by economists and industry specialists as an aid to economic interpretation and forecasting.

In the year to October 2013, the volume of construction output grew by 5.3%. New Work and Repairs and Maintenance, both observed growth of just over 5%. New work reflected growth of 5.1% in the year to October 2013, with the housing sector being the main driver of growth. Both public corporations and the private sector contributed to the growth in housing, which overall grew at a rate of just under 20% in the year to October 2013. The only other category of New Work performing strongly was in commercial construction, which grew by 8.7%. Other categories of construction such as infrastructure, public corporations and private sector industrial all contracted in the year to October 2013.

The mixed picture being presented by different components of the construction industry are a reflection of consumer indicators and output growth in the economy. The introduction of help-to-buy schemes has buoyed the housing market and may be contributing to relatively strong growth in house prices, which grew by 3.8% in the year to September 2013. The increased demand for housing may be a factor spurring construction in the housing sector. The Bank of England’s Agents summary of business conditions reported that housing activity had picked up significantly but remains below pre-crisis levels. Construction growth in the industrial category however remains weak and negative, consistent with the subdued performance of the production sector since Q1 2011.

The second estimate of GDP confirmed that growth was 1.5% in Q3 2013 compared with Q3 2012. The index of services grew by 1.9% in Q3 2013 compared with Q3 2012 while the index of production increased 3.2% in the year to October 2013. Construction was the strongest performing sector of the economy, increasing by 5.3% in the year to October 2013.


Figure 1: GDP components, chained volume measures, seasonally adjusted (SA)

Figure 1: GDP components, chained volume measures, seasonally adjusted (SA)
Source: Construction: Output & Employment - Office for National Statistics

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Figure 1 shows the quarterly path for GDP and its components from Q1 2005. While it is apparent that all the components were severely affected by the economic downturn from 2008 it is clear that the downturn had a more pronounced effect on both production and construction. Production and construction have in fact gone through a second contraction. The production dip began in Q4 2010 and output fell to levels lower than those seen through the downturn, while construction fell slightly later, beginning its decline in Q2 2011 and is now at levels originally seen in 2009.

More information on how construction output has fared during economic downturns can be found in the article 'UK Construction Industry downturn in an historic context'

Output in the Construction Industry, October 2013

Figure 2: All work, monthly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted

Figure 2: All work, monthly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted
Source: Construction: Output & Employment - Office for National Statistics

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Comparing October 2013, with the same month 12 months ago (Figure 2), the output of construction increased by 5.3% and by 2.2% when compared with September 2013. The month on month data above show increases in both sub-sectors of construction output, where new work grew 2.4% and repair and maintenance grew 2.0%. September’s estimates were revised up 0.4 percentage points to a fall of 0.5% from the initial estimate of a fall of 0.9%.

The latest estimates of the chained volume measure of construction output for October 2013 was £9,813 million, this is the highest level since December 2011 and the revised Q3 volume of £28,859 million is the highest quarter recorded since Q4 2011.

Figure 3: All new work, monthly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted

Figure 3: All new work, monthly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted
Source: Construction: Output & Employment - Office for National Statistics

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All new work (Figure 3) grew 2.4% in October 2013 when compared with September 2013. There are however mixed results within the new work estimates. New housing continued to show good growth, increasing 5.8% on the month with infrastructure also estimated to have increased by 7.5%. Other new work showed slightly more subdued results with public other work declining 5.7% and private industrial other work falling 5.8% month on month.

The longer term data show similar trends with new housing increasing 18.6% when compared with October 2012 and private industrial falling by 26.0%. Private industrial new work is now estimated to be at its lowest volume since the monthly series began in January 2010.

Figure 4: Repair and Maintenance, monthly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted

Figure 4: Repair and Maintenance, monthly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted
Source: Construction: Output & Employment - Office for National Statistics

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Both the long and short term growths for repair and maintenance were mainly positive (Figure 4). When comparing October 2013 with October 2012, repair and maintenance increased 5.6% and by 2.0% when compared with September 2013.

The three monthly data show similar patterns, with a three month to October increase of 2.1% and a three month on a year ago increase of 6.3%. Within the repair and maintenance sector most of the strength in growth was down to non-housing repair and maintenance which increased 3.9% month on month and by 9.3% when compared to October 2012, and at £1,958 million is at the highest level since the monthly series began in January 2010.

During the same periods housing repair and maintenance, which is almost at an equivalent volume to non-housing repair and maintenance, showed 0.0% and 1.7% growths respectively.

Table 1: Construction output summary tables, chained volume measures, seasonally adjusted

  Percentage change £million
  Most recent 3 months on a year earlier  Most recent 3 months on 3 months earlier  Most recent month on the same month a year ago Most recent month on the previous month Most recent level
Construction  
Total All Work     6.4 2.5 5.3 2.2 9,813
Total All New Work     6.5 2.8 5.1 2.4 6,092
Total Repair and Maintenance     6.3 2.1 5.6 2.0 3,721
             
   
All New Work
 
Total All New Work     6.5 2.8 5.1 2.4 6,092
New Housing              
  Public Corporations     11.7 1.4 16.8 6.3 394
  Private Sector     18.2 4.9 19.1 5.7 1,576
Other New Work              
Infrastructure     -4.8 -0.5 -2.8 7.5 1,143
Excl Infrastructure              
Public Corporations     -3.8 -0.6 -6.8 -5.7 792
Private Sector               
Private Sector - Industrial     -15.4 4.7 -26 -5.8 229
Private Sector - Commercial     13.2 5.9 8.7 0.8 1,958
               
   
Repair and Maintenance
 
Total Repair and Maintenance     6.3 2.1 5.6 2.0 3,721
Housing              
Public corporations     -5.5 3.0 -5.1 1.5 592
Private sector     8.6 -0.5 5.6 -0.8 1,171
Non-Housing     9.0 3.4 9.3 3.9 1,958
             

Table source: Office for National Statistics

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Revisions to Construction Output

Figure 5: All Work, quarterly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted

Figure 5: All Work, quarterly time series, chained volume measures, non-seasonally (NSA) and seasonally (SA) adjusted
Source: Construction: Output & Employment - Office for National Statistics

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In line with the UK national accounts revision policy, this publication and associated dataset contains revisions from January 2012. Revisions to the quarterly data from 2012 Q1 would produce a revision of 0.1% to GDP in Q1 and Q3 of 2013 when used without the additional components of GDP, the indexes of services and production.  

The revisions to the time series data at disaggregated level can be found in the dataset linked to this bulletin.

Orders for New Construction - Q3 2013

Figure 6: New Orders, Constant (2005) index prices, seasonally adjusted

Figure 6: New Orders, Constant (2005) index prices, seasonally adjusted
Source: Barbour ABI

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It is estimated that the seasonally adjusted volume of all new orders fell between Q2 and Q3 2013 by 0.2% to £12.8 billion (Figure 6). Within the sub-sectors new housing showed growth of 0.6% while other work fell by 0.5%.  

When comparing Q3 2013 with Q3 2012 five out of the six sub-sectors showed growth with the exception of public other new work, which fell 3.9% during the period. There was strong growth in both new housing series where private new housing grew 31.5% and public new housing by 77.6%. Total new housing is now at its highest level since Q4 2007 while public new housing is at its highest level since Q3 1993. 

Total new housing has now shown six consecutive periods of positive growth, despite a quarterly fall in the private new housing series, the first time this has occurred since Q1 1993. 

Private industrial new work continues to show quarter on quarter growth with a 31.8% increase in Q3 2013 when compared with Q2, with seven out of the eleven regions showing growth in this sector.

Table 2: Value of New Orders summary tables, Quarterly constant (2005) prices, seasonally adjusted

    Most recent quarter on a year earlier    Most recent quarter on the previous quarter    Most recent level  
     
1. All New Work Percentage change £million
       
       
All New Work 17.8 -0.2 12,769
All New Housing 41.6 0.6 4,058
All Other Work 9.2 -0.5 8,711
       
       
1.1  New Housing Percentage change £million
       
       
All New Housing 41.6 0.6 4,058
Public 77.6 11.9 1,112
Private 31.5 -3.0 2,946
       
       
1.2  Other New Work Percentage change £million
       
       
All Other Work 9.2 -0.5 8,711
Infrastructure 1.5 2.0 2,781
Excl Infrastructure    
Public -3.9 -11.1 1,824
Private - Industrial 29.7 31.8 857
Private - Commercial 21.3 -2.4 3,249
     

Table source: Barbour ABI

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Users should note that these New Orders statistics use data from Barbour ABI and are therefore produced using different methods from those in place at the time when the statistics were first assessed for compliance with the Code of Practice for Official Statistics. They are currently being reassessed as part of an ongoing assessment of ONS's short-term economic output indicators, with a view to confirming their designation as National Statistics. Further details on the collaboration between the ONS and Barbour ABI can be found in the background notes section of this bulletin.

Construction estimates in gross domestic product

Construction estimates are a key component of the output approach to measuring GDP along with the estimates of services, production and agriculture. As an aid to users, the short term releases that directly feed into GDP now include an additional table of GDP components. It is anticipated that this table will inform users of the relationship between the individual components which comprise GDP output. The publication dates and the quarterly growths of the individual GDP components are shown in the GDP components summary.  

Table 3 shows the output figures that fed into GDP for 2013 and the latest data for Q4. Previous quarters are revised this month in accordance with the national accounts revisions policy. 

Each component of GDP has a weight within GDP based on its value in 2010. Construction has a weight of 63 which means that it is 63 parts of the 1,000 that make up total GDP.

 

To determine the effect each component has on GDP multiply the component growth by its weight in GDP.

 

An example using Q2 2013 data: 

Construction growth    = 1.9

Weight in GDP            = 0.063 (63/1000)

Effect on GDP                        = 1.9 * 0.063 = 0.1197 or 0.1 to 1 decimal point. 

Revisions to components and the effect on GDP can be calculated using the same process. As a general rule there are no revisions to GDP when the component revisions are:

 IoP = between 0.3 and -0.3

Construction = between 0.7 and -0.7

IoS = 0.0 (all values above or below 0.0 effect GDP due to the high weight of IoS in GDP).

Because;

IoP =                           0.152*0.4 =     0.0608 or 0.1 to 1 dp  

Construction =            0.063*0.8 =     0.0504 or 0.1 to 1 dp

IoS =                           0.778*0.1 =     0.0778 or 0.1 to 1 dp

Table 3: GDP Quarter 3 2013 component tables, chained volume measure, seasonally adjusted

        Percentage Change
Publication Weight in GDP Release date Latest period Most recent quarter on a year earlier  Most recent quarter on the previous quarter   Most recent month on the same month a year ago Most recent month on the previous month
GDP 1000            
27 Nov Q31 1.5  0.8 
  Q2 1.3  0.7
  Q1 0.2  0.4 
Index of Production 152 10 Dec Oct 1.3  0.1  3.2  0.4 
  Q3 -0.1  0.6 
  Q2 -0.5  0.8 
  Q1 -2.3  0.6 
Construction output 63 13 Dec Oct 6.4  2.5   5.3 2.2 
  Q3 6.3  2.6   :  :
  Q2 1.5  2.6   :  :
  Q1 -4.6  -0.4   :  :
Index of Services 778            
27 Nov Q3 1.9  0.7 
  Q2 2.1  0.6 
  Q1 1.3  0.6 
Retail Sales   14 Nov Oct 1.9  0.0   1.8  -0.7
    Q3 2.1  1.3   :  :
    Q2 1.4  1.0   :  :
    Q1 -0.2  0.2   :  :
Agriculture 7            
27 Nov Q3 -4.2  -1.4   :  :
  Q2 -3.3  2.0   :  :
  Q1 -7.2  -5.1   :  :
               

Table source: Office for National Statistics

Table notes:

  1. Second Estimate of GDP

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Background notes

  1. What’s new?
    In response to user feedback and in line with the announcement made in the article ‘Improvements to the methods used to compile Output in the Construction Industry statistics’, this statistical bulletin now contains monthly seasonally adjusted chained volume estimates. Due to the potential for confusion when comparing constant price (volume) and chained volume measures, all references to constant price series have been removed from this, and future bulletins. In line with the announcement made in previous bulletins the constant price series have also been removed from the associated time series dataset that accompanies this release.

    A new Summary Quality Report (100.2 Kb Pdf) for New Orders in the Construction Industry is now available. This updated report details the current methodology incorporating Barbour ABI data.

    It should be noted that due to seasonal adjustment taking place on a short span of data points used to interpret the seasonal effects there is potential for increased revisions until the seasonal pattern is established within the time series.

    Users should note that a monthly seasonally adjusted chained volume series is not available pre-2010. This is due to monthly data not being available for this period. These data are a requirement for creating previous year’s prices from which chain linked volume measures are created.

    Changes to production method for Construction Output estimates
    In early 2014, estimates of construction output will be produced from a new system built into the ONS Central Repository for Data (CORD) platform. Further information on this can be found in the article, 'Production of Construction Output estimates using the Central ONS Repository for Data (CORD) platform (53.5 Kb Pdf) '. 

  2. About this release
    Construction output estimates are a short term indicator of construction output while new orders in the construction industry estimates are a short term indicator of construction contracts for new construction work awarded to main contractors by clients. Both these estimates are by private sector and public corporations within GB. Output estimates are produced and published at current prices (including inflationary price effects) and at chained volume estimates (with inflationary effects removed) both seasonally adjusted and non-seasonally adjusted. Chained volume measures are also described as volume. Construction output is used in the compilation of the output approach to measuring gross domestic product (GDP).

    New orders data are produced at current prices (including inflationary price effects) and at constant prices (with inflationary effects removed).  The constant price series are also seasonally adjusted.

    The data published in this release cover construction estimates for Great Britain. Construction output estimates for Northern Ireland can be obtained from the Central Survey Unit.

  3. Changes to New Orders Construction Statistics
    New Orders in the Construction Industry estimates have been compiled using data supplied by Barbour ABI. These data have also been used in the compilation of tables 5 and 6 in the Output in the Construction Industry data tables. Full details of this change in data source can be found in the article, 'Announcement of Changes to New Orders in the Construction Industry'.

     

  4. Aligning the construction output revision period with National Accounts policy
    Construction output is a key component of the production approach to measuring gross domestic product (GDP) and, as such, should be subject to the same data policies that govern the accounts although historically it has not been. National accounts data are subject to a revision policy which determines the periods open for data revisions ensuring that revisions to individual estimates can be shown throughout the accounts. Other major short term indicators such as the Index of Production, UK Trade and the Index of Services already adhere to this policy.

    From this publication the construction output time series has assumed the same revision policy as the UK National Accounts.

    The UK National Accounts revisions policy (27.8 Kb Pdf) covers all published quarterly and annual series appearing in the National Accounts. The National Accounts represent a wide array of data on areas as diverse as production, trade, earnings, spending, investment in fixed and financial assets and balance sheets. The nature of the National Accounts is that in principle all the activity is linked, so that a change in one area will have an impact elsewhere and consequently making revisions to one part of the National Accounts may lead to revisions through the system. The main strength of the system is that it allows analysis of the various economic indicators both in isolation and in conjunction with others. The strength of the integrated National Accounts system however may mean less flexibility for taking on revisions to the National Accounts. The National Accounts revisions policy is designed to give users a clear understanding of which periods are open for revision at each data release and why incorporating revisions from a single source is not a simple matter.

    The current revision policy for construction output is to revise current price survey data for 13 months and seasonal factors for 5 quarters. While this is still applicable for processing the data the revisions to the time series will not be available to users until the back periods are ‘open’ for revisions within the National Accounts.

  5. Statistical continuous improvement
    In December 2012, as part of its Statistical Continuous Improvement programme, ONS published a Review of Sample Design and Estimation Methodology for Construction Output. This report evaluated the sample design and estimation methods used on the Construction Output Survey. The conclusions of the review were that the current sample is performing well and that the current methodology for estimation within the survey produces the smallest standard error.

     

  6. Use of the data
    Output in the Construction Industry estimates are widely used both internally and externally and have been identified by legal requirement and user engagement surveys.

    The key users of data from the Output of the Construction Industry dataset are:

    • United Kingdom National Accounts. 

    • Eurostat, the statistical office of the European Union, in order to comply with statutory legislation on short-term business statistics (STS). Short-term business statistics provide information on the economic development of four major domains: industry, construction, retail trade and other services.

    • Industry analysts requiring estimates of the construction industry output of Great Britain.

    • Trade associations making UK and international comparisons and to forecast trends in the construction industry.

    • Other government departments including; the Department for Business, Innovation and Skills (BIS), HM Treasury (HMT), Department for Communities and Local Government (DCLG) and the Office for Budgetary Responsibility (OBR).

    As well as being a key indicator of the performance of construction companies, the results of the survey also contribute to the estimate of the gross domestic product of the UK, contributing approximately 6.3% of GDP.

  7. Methods
    The ONS Monthly Construction Output Survey measures output from the construction industry in Great Britain. It samples 8,000 businesses, with all businesses employing over 100 people or with an annual turnover of more than £60m receiving a questionnaire by post every month. The results of the survey are deflated using price indices from the Building Cost Information Service (BCIS) of the Royal Institute of Chartered Surveyors (RICS) and then seasonally adjusted using X-12 Arima to derive the published estimates.

    Since the 1950s New Orders in Construction data had been collected from a sample survey of businesses; originally monthly and then quarterly.  There were some known quality issues with the survey data as (a) the coverage of the survey was unknown; and (b) new orders allocated to regions were not always accurately recorded.  The New Orders data are now supplied under contract to the ONS by Barbour ABI. Barbour ABI will provide ONS with improved coverage and regional splits of new orders in construction data.

  8. Quality
    The latest Quality and Methodology report (161.5 Kb Pdf) for the Output of the Construction Industry estimates can be found on the ONS website.

    A new Summary Quality report (100.2 Kb Pdf) for New Orders in the Construction Industry is now available. This updated report details the current methodology incorporating Barbour ABI data.

  9. Output Revisions
    In addition to 13 months of survey data revisions, a refinement to the seasonal pattern has caused slight revisions to the seasonally adjusted time series from Q1 2012. This publication shows data revisions for Q1 2012 in line with the National Accounts revision policy explained previously.

    One indication of the reliability of the key indicators can be obtained by monitoring the size of revisions. Analysis of the previously published quarterly seasonally adjusted constant price series has shown that revisions to construction data are small. Generally these quarterly revisions are less than 1% when compared to the final revised period five quarters after initial publication. This indicates that the published estimates are a reliable snapshot of the output in the industry at the date of publication.
    Table 4 records the size and pattern of revisions which have occurred in the chained volume measures in line with the National Accounts revision policy. Please note that these indicators only report summary measures for revisions. The revised data may be subject to sampling or other sources of error. Details about this revisions material can be found in the document ‘Revisions information in ONS First Release’.

    Table 4: Quarterly growth revisions to previously published CVM output

     
      New work published in this release New work estimates previously published New work revisions
    Q1 2012 -6.2 -6.4 0.2
    Q2 2012 -4.3 -4.6 0.3
    Q3 2012 -2.2 -2.8 0.6
    Q4 2012 2.6 3.2 -0.6
    Q1 2013 -1.2 -2.3 1.1
    Q2 2013 2.7 2.2 0.6
           
           
           
      R&M published in this release R&M estimates previously published R&M revisions
    Q1 2012 0.7 -0.1 0.7
    Q2 2012 -2.2 -2.3 0.1
    Q3 2012 -1.8 -0.6 -1.2
    Q4 2012 -0.5 -0.2 -0.2
    Q1 2013 0.8 0.2 0.6
    Q2 2013 2.4 1.5 0.9
           
           
           
      Total output published in this release Total Output estimates previously published Total output revisions
    Q1 2012 -3.7 -4.1 0.4
    Q2 2012 -3.5 -3.8 0.2
    Q3 2012 -2.0 -1.9 -0.1
    Q4 2012 1.4 1.8 -0.5
    Q1 2013 -0.4 -1.3 0.9
    Q2 2013 2.6 1.9 0.7

    Table source: Office for National Statistics

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  10. New Orders Revisions
    This publication includes current price data revisions for Q2 2013.

    One indication of the reliability of the key indicators can be obtained by monitoring the size of revisions. The tables below record the size and pattern of revisions which have occurred over the revision period. Please note that these indicators only report summary measures for revisions. The revised data may be subject to sampling or other sources of error. Details about this revisions material can be found in the document ‘Revisions information in ONS First Release’.

    Table 5: Growth revisions to previously published KP new orders data

      All New Work
      All New Work published in this release (%) All New Work previously published (%) All New Work revisions (%)
     
     
    Q2 2013 10.4 10.6 -0.2

    Table source: Barbour ABI

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    Current price estimates for Q2 have been revised down due to the cancellation of new orders contracts. The time series data in the tables associated with this bulletin, at all prices, contain this revision.

     

  11. Relevant links
    International Comparisons
    International construction comparisons are compiled by Eurostat. The estimates produced in this bulletin are included in these comparisons. Further information can be found on the Eurostat web page.

  12. Further information
    Releases on construction output and employment prior to the transfer to ONS can be found on the BIS website.

  13. User Engagement
    The user engagement section of the ONS website contains results of the survey held in April 2011 regarding users' satisfaction and use of the new orders and construction output surveys.

     

  14. Understanding the data

    Interpreting the data
    When making comparisons it is recommended that users focus on chained volume measures or constant price (volume), seasonally adjusted estimates as these show underlying movements rather than seasonal movements.

    Construction output estimates are subject to revision because of:

    • Late responses to the Construction Output Survey.

    • Revisions to seasonally adjusted factors which are re-estimated every quarter.

    • Annual updating of the Inter-Departmental Business Register (IDBR) that forms the basis of the sampling for the Construction Output Survey. This occurs in January and can have an effect on the results published in May.

    Definitions and explanations
    Definitions of terminology found within the main statistical bulletin are detailed below:

    Output
    Output is defined as the amount chargeable to customers for building and civil engineering work done in the relevant period excluding VAT. As well as work charged to customers, businesses are asked to include the value of work done on their own initiative on buildings such as dwellings or offices for eventual sale or lease, and of work done by their own operatives on the construction and maintenance of their own premises. The value of goods made by businesses themselves and used in the work is also included.

    In all returns, work done by sub-contractors is excluded to avoid double counting, since sub-contractors are also sampled. Output does not include payments made to architects or consultants from other firms – this would also cover engineers and surveyors. It would include wages paid to such people if they were directly employed by the business.


    Current price (value) (CP)
    Current prices are the actual or estimated recorded monetary value over a defined period. They show the value for each item expressed in terms of the prices of that period.

    Constant price (volume) (KP)
    A constant price or volume measure is a series of economic data from successive years expressed in real terms by computing the production volume for each year in the prices of a reference year. The resultant time-series of production figures has the effects of price changes removed (that is, monetary inflation or deflation). In other words, from the raw data a series is obtained which reflects only production volume. See the ‘Deflation’ section. Constant price series in this bulletin are based on the reference year 2005.

    Chained volume measures (CVM)
    A chained volume series is a series of data from successive years, put in constant price terms by computing the production volume for each year in the prices of the preceding year, and then chain-linking the data together to obtain a time-series of production figures from which the effects of price changes (i.e., monetary inflation or deflation) have been removed. Further information on chain-linking can be found in the methodological article ‘Annual chain-linking’.

    Seasonal adjustment (SA)
    Seasonal adjustment aids interpretation by removing effects associated with the time of the year or the arrangement of the calendar, which could obscure movements of interest.

    Deflation
    It is common for the value of a group of financial transactions to be measured in several time periods. The values measured will include both the change in the volume sold and the effect of the change of prices over that year. Deflation is the process whereby the effect of price change is removed from a set of values. The current reference year is 2010 for CVM data.

    Sectors
    Institutional sectors are defined in the System of National Accounts (SNA) glossary as;
    Units that are grouped together to form institutional sectors on the basis of their principal functions, behaviour, and objectives.

    The resident institutional units that make up the total economy are grouped into five mutually exclusive sectors:

    • Non-financial corporations.

    • Financial corporations.

    • General government.

    • Non-profit institutions serving households.

    • Households.

    In the case of non-financial and financial sectors these can be further broken down into public sector, those units either controlled by the state or funded from the public purse and include general government, local authorities, housing associations and nationalised industries and private sector, those units controlled by private individuals or groups and not by the public sector.

    Gross domestic product (GDP)
    Gross domestic product (GDP) is an integral part of the UK national accounts and provides a measure of the total economic activity in a region.

    GDP is often referred to as one of the main 'summary indicators' of economic activity and references to 'growth in the economy' are quoting the growth in GDP during the latest quarter.

    Construction estimates are a component of GDP from the output or production approach (GDP(O)) which measures the sum of the value added created through the production of goods and services within the economy (our production or output as an economy). This approach provides the first estimate of GDP and can be used to show how much different industries (for example, agriculture) contribute within the economy.

    Housing
    Housing is generally defined as ‘all buildings that are constructed for residential use’. Within the public sector this classification includes construction items such as local authority housing schemes, hostels (except youth hostels), married quarters for the services and police; old peoples' homes; orphanages and children’s remand homes; and the provision within housing sites of roads and services for gases, water, electricity, sewage and drainage.

    Private sector housing includes all privately owned buildings for residential use, such as houses, flats and maisonettes, bungalows, cottages, vicarages, and the provision of services to new developments.

    Infrastructure
    Infrastructure is the generic term for the basic physical and organizational structures and facilities needed for the operation of a society or enterprise. These construction items include buildings, roads, power supplies, etc.

    Other new work
    Other new work excludes the housing and infrastructure sectors. This classification includes construction items such as factories, warehouses, schools and offices, etc.

    Non-housing
    Within the public sector, non-housing is classified as the construction of building such as schools and colleges, hospitals, universities, fire stations, prisons and museums. Private sector non-housing is comprised of the private /industrial and private/commercial classifications. Private - industrial is the economic activity concerned with the processing of raw materials and manufacture of goods in factories and includes construction items such as factories and shipyards while private – commercial includes all items not included in the previous categories such as embassies, theatres, retail units, warehouses and garages, etc.

    Repair and maintenance
    The repair and maintenance heading in the construction estimates comprises of housing, infrastructure and other new work. This concerns work which is either repairing something that is broken, or maintaining it to an existing standard.  For housing output this includes repairs, maintenance, improvements, house/flat conversions, extensions, alterations and redecoration, etc. on existing housing. For non-housing this includes repairs, maintenance, redecoration, etc. on existing buildings/structures, which are not housing, for examples schools, offices, roads, shops.

    Table 1 of this bulletin aggregates infrastructure and other new work into non-housing.

  15. Code of Practice for Official Statistics
    National Statistics are produced to high professional standards which are set out in the Code of Practice for Official Statistics. They undergo regular quality assurance reviews to ensure that they meet customer needs and are produced free from any political interference.

  16. Publication policy
    Details of the policy governing the release of new data are available from the Media Relations Office.

  17. Accessing data
    The Output in the Construction Industry incorporating New Orders in the Construction Industry statistical bulletin and relevant time series datasets are available to download free from the Office for National Statistics website at 9.30 am on the day of publication.

    ONS allows a list of agreed officials to have access to data 24 hours before publication, which is available on the Construction release page.

  18. Further information and user feedback
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  20. Details of the policy governing the release of new data are available by visiting www.statisticsauthority.gov.uk/assessment/code-of-practice/index.html or from the Media Relations Office email: media.relations@ons.gsi.gov.uk

Statistical contacts

Name Phone Department Email
Stuart Deneen +44 (0)1633 456344 Office for National Statistics construction.statistics@ons.gsi.gov.uk
Get all the tables for this publication in the data section of this publication .
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