Data on enterprises with more than 49 employees classified to the construction section are collected by a full-scale survey, that on enterprises with 5–49 employees by a sample survey. Grossing up is the estimation of averages based on multiplying up along with the determination of the standard error. Estimates on enterprises with less than 5 employees are calculated form data of in-year VAT declarations and monthly statistics reports. Data on territorial units are referring to enterprises with more than 4 employees.
Construction activity is observed according to two aspects separated from one another: character of implemented works (TEÁOR’08) as well as type of the implemented construction (Building Register).
NACE (TEÁOR) classification: division of construction of buildings (TEÁOR’08 41), in addition to building of complete constructions, includes project organization activities on building construction. Division of civil engineering works (42) includes building of complete constructions of civil engineering works. Specialised construction works (43) can be carried out on buildings and civil engineering works.
Data by main groups of buildings show the value and the volume of construction activities performed on civil engineering works irrespective of the character of the performed works.
Because of the above mentioned, data according to sectors and main groups of buildings can differ from each other.
Building: such structurally separate construction that forms a space, which, with building structures, is partially or wholly enclosed from the surrounding space.
Civil engineering works: all other constructions not qualified as a building (roads, railways, water facilities, wires, etc.).
Own-account construction: Activity performed by personnel as well as contract staff, by own or rented machines, which is aimed at building new constructions, enlarging, transforming, demolishing as well as maintaining existing constructions.
Volume index of construction production: It reflects changes in the value of construction activity at comparative prices of the reference period.
Total orders: value of orders concluded, as a main contractor, by construction enterprises and customers, received and confirmed by a construction enterprise that is classified to the construction-installation activity in a written form at the end of the reference month.
New orders: value of all construction contracts, received and confirmed in the reference month irrespective of whether implemented or not.
Volume index of contracts: reflects changes in the value of contracts at comparative prices of the reference period.
Released data are preliminary, because of data corrections may differ from previously released ones. Corrected data are released in publications for the reference months of March, June, September and December. This time data on the reference year are revised and modified from the beginning of the year. We depart from this practice only in a justified case e.g. when a significant error is detected, in this case a data revision is carried out and we publish the corrected data in the next first release. Prior year’s final data are determined in July-August every year. These data are released in the first release for the reference month of July. This time reference year indices may change along with the base year’s 12 month volume index and value data.
Construction producer price index
One of the most frequently applied methods of the international practice is used to calculate a construction price index, namely changes in prices of homogeneous elements, sub activities so called building items are observed and the price index is made up of these with an appropriate weight system. In the international literature, this method is known under the name “component cost method”, referring to observing changes in prices of individual building items. A producer (or output) type price index is calculated to express changes in that price which is paid by the customer to the builder. In the producer price index, beyond changes in prices of factors used in the construction process, changes in productivity and builder profits are appearing. At the same time, changes in design, engineering and lawyer fees, plot/site prices, VAT and other costs incurred on the final owner are not included. Producer price indices are calculated form market prices, which are collected from the contracts of construction enterprises.
Source of data: Compulsory data service titled “Construction Price Statistics” under number 1831 of the National Statistical Data Collection Programme (OSAP) set by the government. There is a quarterly data collection.
Group of data providers: designated enterprises classified to the construction industry (a total of around 950).
Unit of observation: building item. 217 representative building items are selected to the data collection, their comparability is ensured by fixed technical parameters. Out of these, the data provider selects the (highest value, most frequent) items that represents his own work, whose parameters are fixed in line with his own building practice in consultation with a HCSO expert.
Unit price of building items: unit prices of selected items exclusive of VAT and inclusive of material and fee costs, which are originating from budgets establishing entrepreneur fees of contracts and contract amendments concluded in the period from 15th of month 1 to 15th of month 2 in the given reference year.
Construction price index: For enterprises classified to the construction industry, a price index that is calculated by a base period weighting from unit prices of building items sold on a regular basis.
Price indices by type of building: price indices calculated by building specific weight ratios from the price index of the characteristic building items of the building.
Calculation method: The basic element of the index calculation system is the item-variation-index by enterprises, which is calculated as a quotient of the given item’s reference and base period prices reported by the enterprise. Out of these, at first enterprise indices are calculated by a simple arithmetic averaging, then, out of the enterprise indices, sub-class indices are calculated by aggregating with weights according to a breakdown by staff size category, building-civil engineering work. Out of the sub-class index, the construction price index is calculated. Weights of enterprises and sub-classes are originating from annual construction statistics; production data originating from the year two years before the reference year are used as a weight to calculate higher level aggregates. To calculate a building-type-index, at first, item indices are calculated as the individual item-variation-indices’ simple arithmetic average, then the item indices are weighted together by type of buildings. Weights used to indices by type of building are compiled by external experts, who derived weight ratios from budgets by different types of buildings.