Trend indicator of renovation building: documentation of statistics
The documentation of the statistics describes how the statistics were compiled and what methods were used in the compilation. The data help interpret the figures of the statistics and evaluate their reliability and comparability. The quality report is based on the EU's SIMS model. The documentation also contains change releases describing changes in the statistics and possible specifying methodological descriptions.
If you are looking for statistical figures for these statistics, go to the statistics page: Trend indicator of renovation building
Quality report
Data description (SIMS 3.1)
The trend indicator of renovation building describes the development of building construction in the whole country divided into renovation building and newbuilding. Data are collected from different data sources and published quarterly.
Sector coverage (SIMS 3.3)
The sample comprises the construction enterprises included in the population that employ at least 60 persons or have a turnover of more than EUR 40 million or a balance sheet value of more than EUR 300 million and that participate in the collection of renovation building data from construction enterprises. Large construction enterprises exceeding the threshold are comprehensively represented in the statistics. All enterprises included in the population that are below the threshold are also included in the sample.
The strata are based on the size and industrial classification of the enterprise. Large enterprises are grouped as a separate stratum. Small enterprises with fewer than five employees are not included in the statistics. Many small construction enterprises specialise in renovation building, such as installation and finishing work.
In 2021, most (86%) of the construction enterprises were small businesses with fewer than five employees. However, the turnover of construction enterprises with fewer than five employees only accounts for 17 per cent of the construction sector turnover.
Statistical unit (SIMS 3.5)
Construction enterprise
Statistical population (SIMS 3.6)
The population of the trend indicator of renovation building comprises all enterprises with at least five employees in the following industries listed in Statistics Finland’s Register of Enterprises and Establishments: 41 Construction of buildings and 43 Specialised construction activities (excl. 43120 Site preparation, TOL 2008).
Reference area (SIMS 3.7)
The trend indicator of renovation building is published on the level of the whole country.
Time coverage (SIMS 3.8)
The time series of the trend indicator of renovation building start from the first quarter of 2021.
Base period (SIMS 3.9)
The year 2021 is used as the base period.
Unit of measure (SIMS 4)
The data of the statistics are published as point figures and change percentages.
Reference period (SIMS 5)
The reference period of the statistics is a quarter.
Concepts and definitions (SIMS 3.4)
Domestic turnover
Domestic turnover refers to the volume of domestic taxable sales in the payment control data of the Tax Administration. In addition to domestic sales, the volume of taxable sales includes own use of (construction)services.
Newbuilding
Newbuilding includes construction of new buildings subject to building permits, expansion of buildings and alterations comparable to rebuilding. Newbuilding produces new space either entirely in the form of new building construction, extensions made to existing buildings or reconstructed buildings.
Renovation
In broad terms renovation refers to all activity aimed at improvement and maintenance of the condition of an existing building or parts thereof. In Statistics Finland's different statistics, renovation is broken down to basic renovation and refurbishment. The term used for refurbishment varies in different statistics. In the Household Budget Survey, for instance, it is referred to as maintenance repairs. In national accounts, building renovation is included in fixed capital formation and refers to fundamental improvement of a building. After renovation the value of a building is comparable to new. Refurbishment is a less significant activity than renovation. Refurbishment refers to regular repairs and maintenance to buildings or parts thereof (also referred to annual repairs). Building extensions count as newbbuilding.
Report on contract details
The buyer of construction work must submit the details of the contracts it has concluded to the Finnish Tax Administration. The report is only required if the value of a contract exceeds EUR 15,000 (excl. VAT). A separate report must be submitted for each contract. The contract may be oral or in writing.
Institutional mandate (SIMS 6)
The compilation of statistics is guided by the Statistics Act. The Statistics Act contains provisions on collection of data, processing of data and the obligation to provide data. Besides the Statistics Act, the General Data Protection Regulation, the Data Protection Act and the Act on the Openness of Government Activities are applied to processing of data when producing statistics.
Statistics Finland compiles statistics in line with the EU’s regulations applicable to statistics, which steer the statistical agencies of all EU Member States.
Further information: Statistical legislation
Legal acts and other agreements (SIMS 6.1)
The compilation of statistics is guided by the Statistics Act. The Statistics Act contains provisions on collection of data, processing of data and the obligation to provide data. Besides the Statistics Act, the Data Protection Act and the Act on the Openness of Government Activities are applied to processing of data when producing statistics.
Statistics Finland compiles statistics in line with the EU’s regulations applicable to statistics, which steer the statistical agencies of all EU Member States.
Further information: Statistical legislation
Data sharing (SIMS 6.2)
The statistics are published on the website of the statistics.
Source data (SIMS 18.1)
The data used in the trend indicator of renovation building come from three sources:
1. Annual statistics on renovation building
From the 2012 statistical year onwards, the statistics have been based on a sample-based inquiry sent to construction enterprises with at least five employees. The sample comprises all enterprises with at least 60 employees (the minimum was raised from 50 to 60 in the 2019 statistical year) and enterprises with a turnover of more than EUR 40 million or a balance sheet of more than EUR 300 million. Enterprises under the threshold but employing at least five persons have been selected for the sample based on random sampling.
The sampling frame of the statistics is based on Statistics Finland’s Register of Enterprises and Establishments. The inquiry is carried out together with the financial statements inquiry for enterprises and its financial statements database is used to analyse enterprises’ background data. The financial statements statistics also contain figures taken from the business tax data of the Finnish Tax Administration.
2. Data on self-assessed taxes collected by the Finnish Tax Administration
The index is calculated using data on self-assessed taxes derived from the Tax Administration. The data contain the value added tax data of the enterprises submitting the data on a monthly, quarterly and annual basis. Enterprises with an annual turnover of more than EUR 100,000 must submit the data on a monthly basis. Enterprises with an annual turnover of between EUR 30,001 and EUR 100,000 must submit the data on a quarterly basis. Enterprises with a maximum annual turnover of EUR 30,000 must submit the data on an annual basis.
3. Reports on contract details submitted to the Finnish Tax Administration
Enterprises ordering construction work must submit the details of the contracts they have concluded to the Finnish Tax Administration. The report must be submitted if the enterprise orders any of the following construction work from another enterprise:
- Building construction and related preparatory, demolition and installation work or any other construction services referred to in the Value Added Tax Act.
- Erection and dismantling of scaffolding
- Leasing of employees for construction work.
The report is only required if the value of a contract exceeds EUR 15,000 (excl. VAT). A separate report must be submitted for each contract. The contract may be oral or in writing.
The first report on contract details must be submitted when the construction work starts at the site. If advance payments are made for the work, the report must be submitted for the month during which the advance payments have been made.
Contract details must be submitted by the fifth day of the second month following the reporting month. For example, the details for July must be submitted by 5 September. The last report must be submitted for the month for which the last invoice for the work is paid.
Frequency of data collection (SIMS 18.2)
Statistics Finland does not collect data separately for the trend indicator of renovation building.
Data validation (SIMS 18.4)
The data are validated based on checklists. The focus in the checklists is on large observations. Errors in the data are corrected based on expert assessments.
Data compilation (SIMS 18.5)
Large enterprises exceeding the threshold (see: Coverage) are grouped as a separate stratum and smaller enterprises are grouped in a stratum generated for renovation building of construction enterprises, in which consideration is given to the size and industrial classification of the enterprise.
Shares of renovation building and newbuilding are generated for the strata by using the annual data collected for the renovation building statistics.
Domestic turnover details for the construction enterprises included in the statistics are taken from the Finnish Tax Administration’s data on self-assessed taxes for each target month and the value data for the contracts concluded by the enterprises are taken from the reports on contract details. These data are multiplied by the stratum-specific shares of renovation building and newbuilding so that monthly value data for renovation building and newbuilding can be generated for the enterprises. The value data are compared with value data for the previous year that have accumulated over the same period as the value data for the target month. The data are used as a basis for the time series of point figures, in which the monthly average for 2021 is 100.
Contract details accumulate over many months and they also include correction and deletion notifications. When the data are processed, the latest report on contract details received is used and outdated reports are deleted. When the rates of change are calculated, the delay in the accumulation of contract details is taken into account by using comparison data that have accumulated over the same period as the data for the target month for which the calculations are made.
Overall accuracy (SIMS 13.1)
The share of renovation building may vary substantially by enterprise each year. Because of delays in the publication of the renovation building statistics, the figures for the share of renovation building may be two years old. The latest information available in early 2023 is for 2021.
Quality assurance (SIMS 11.1)
Quality management requires comprehensive guidance of activities. The European Statistics Code of Practice forms the basis for the common quality system of the European Statistical System.
The Code of Practice is based on 16 principles that concern statistical authorities' independence, accountability and the quality of the processes and data to be published.
The principles are in line with the Fundamental Principles of Official Statistics approved by the United Nations Statistics Commission and are supplementary to them. The quality criteria of Official Statistics of Finland are compatible with the European Statistics Code of Practice.
Further information: European Statistics Code of Practice | Statistics Finland and Recommendations of the Advisory Board of Official Statistics of Finland | Statistics Finland
Quality assessment (SIMS 11.2)
The quality of the trend indicator of renovation building is evaluated at several stages of the statistical process. The results are compared with other sources of construction and renovation building data.
Data revision - policy (SIMS 17.1)
Revisions – i.e. improvements in the accuracy of statistical data already published – are a normal feature of statistical production and result in improved quality of statistics. The principle is that statistical data are based on the best available data and information concerning the statistical phenomenon. On the other hand, the revisions are communicated as transparently as possible in advance. Advance communication ensures that the users can prepare for the data revisions.
The reason why data in statistical releases become revised is often caused by the data becoming supplemented. Then the new, revised statistical figure is based on a wider information basis and describes the phenomenon more accurately than before.
Revisions of statistical data may also be caused by the calculation method used, such as annual benchmarking or updating of weight structures. Changes of base years and used classifications may also cause revisions to data.
Seasonally adjusted data in statistics on economic trends become revised because of the calculation method used. Additional information on a new time series observation is exploited in model-based calculation methods and this is reflected as changes in previous releases. Revisions of the latest figures to be seasonally adjusted are elaborated on in the releases and quality reports of statistics.
The data contained in the trend indicator of renovation building are revised in later releases. Accumulation of and corrections to the reports on contract details submitted to the Finnish Tax Administration and used as source data for several months after the target month is the main reason for the revisions.
Timeliness (SIMS 14.1)
The trend indicator of renovation building is published about 70 days after the end of the reference period.
Punctuality (SIMS 14.2)
The data are published on the dates specified in the release calendar.
Comparability - geographical (SIMS 15.1)
The data contained in the trend indicator of renovation building are regionally comparable for the country as a whole.
Comparability - over time (SIMS 15.2)
The time series of the trend indicator of renovation building are comparable with each other. In connection with the updating of the group of enterprises, the time series preceding the update is recalculated based on the old enterprise structure. The recalculated time series is chained from the old time series with the rates of change calculated using the new enterprise structure as a basis.
Coherence – cross domain (SIMS 15.3)
Data on renovation building are published by Statistics Finland each year and they cannot be broken down into quarterly data. Statistics Finland publishes the index of construction turnover on a monthly basis. However, its data cannot be broken down into the turnover of renovation building and newbuilding. Statistics Finland also publishes statistics on building and housing construction describing newbuilding subject to permit. They do not contain any figures for renovation building subject to permit.
Release calendar (SIMS 8.1)
Statistics Finland publishes new statistical data at 8 am on weekdays in its web service. The release times of statistics are given in advance in the release calendar available in the web service. The data become public after they have been updated in the web service.
Further information: Publication principles for statistics at Statistics Finland
Release calendar access (SIMS 8.2)
Statistics Finland's release calendar Future publications
Future publications of the statistics can be found on the page of the statistics at: Future publications of the statistics.
User access (SIMS 8.3)
The data are released to all users at the same time. Statistical data may be processed at Statistics Finland and information on them may be given before release only by persons involved in the production of the statistics concerned or who need the data of the statistics concerned in their own work before the data are published.
Further information: Publication principles for statistics
Unless otherwise specifically stated in connection with the product, data or service concerned, Statistics Finland is the producer and copyright owner of the data. The terms of use for statistical data.
Frequency of dissemination (SIMS 9)
Separate data contained in the statistics are published on a quarterly basis.
News release (SIMS 10.1)
The release is published monthly/annually/quarterly on the home page of the statistics.
Online database (SIMS 10.3)
The database tables of the statistics can be found in the StatFin database.
Confidentiality - policy (SIMS 7.1)
The data protection of data collected for statistical purposes is guaranteed. The compilation of statistics is guided by the Statistics Act. Alongside the Statistics Act, the EU’s General Data Protection Regulation and the Finnish Data Protection Act are applied to the processing of personal data. Provisions on the confidentiality of data collected for statistical purposes are laid down in the Act on the Openness of Government Activities.
The data are processed only by persons who need the data in their work. The use of data is restricted by usage rights. All persons employed by Statistics Finland have signed a pledge of secrecy, where they have obliged to keep secret the data prescribed as confidential by virtue of the Statistics Act or the Act on the Openness of Government Activities.
Further information: Data protection | Statistics Finland (stat.fi)
Confidentiality - data treatment (SIMS 7.2)
The data materials are protected at all stages of processing with the necessary physical and technical solutions. All unit-specific figures contained in the calculation data are confidential. The data are only handled by persons who need the data in their work. The use of data is restricted by usage rights. The phases of the statistical production process produce an end result that does not enable identification of individual data producers. All employees have signed a pledge of secrecy, where they have obliged to keep secret the data prescribed as confidential by virtue of the Statistics Act or the Act on the Openness of Government Activities. The data of the statistics are published on a less detailed level, so the data protection of individual respondents is not endangered.