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Detailed structure and explanatory notes

ISIC Rev.3 code 4520


  • Tabulation Category: F - Construction
  • Division: 45 - Construction
  • Group: 452 - Building of complete constructions or parts thereof; civil engineering
  • Class: 4520 - Building of complete constructions or parts thereof; civil engineering

Explanatory note

This class includes general construction and some special trade construction for buildings and general and special trade construction for civil engineering, regardless of the kind of materials used. It includes new work, additions and alterations, the erection of pre-fabricated buildings or structures on the site and also construction of temporary nature.
Also included is repair of civil engineering projects, but most repairs of buildings that are not complete alterations or additions are classified in classes 4530 (Building installation) and 4540 (Building completion).
General construction mostly involved in the construction of entire dwellings, office buildings, stores and other public and utility buildings, farm buildings, etc., or the construction of heavy constructions such as highways, streets, bridges, tunnels, railways, airfields, harbours and other water projects, irrigation systems, sewerage systems, industrial facilities, pipelines and electric lines, sports facilities, etc. This work can be carried-out on own account or on a fee or contract basis. Portions of the work and sometimes even the whole practical work can be subcontracted out to trade contractors.
Special trade construction includes the construction of parts of the above mentioned works or preparation therefor. It is usually specialized in one aspect common to different structures, requiring specialized skills or equipment. Activities such as pile-driving, foundation work, water well drilling, carcass work, concrete work, brick laying, stone setting, scaffolding, roof covering, etc., are covered. The erection of steel structures is included provided that the parts are not produced by the same unit. Special trade construction will mostly be carried out under subcontract, but especially in repair construction it is done directly for the owner of the property.

Exclusions: Landscape planning and design, lawn and garden installation and maintenance and tree surgeons activities are classified in class 0140 (Agricultural and animal husbandry service activities, except veterinary activities).
Construction activities directly related to extraction of oil and natural gas are classified in class 1120 (Service activities incidental to oil and gas extraction excluding surveying). However, the construction of buildings, roads, etc., on the mining site remains in this class.
The erection of complete prefabricated buildings or structures from self-manufactured parts is classified in the relevant category in manufacturing, depending on the material chiefly used, except if the chief material is concrete, in which case it remains classified here. The erection of metal structures from self-manufactured parts is classified in class 2811 (Manufacture of structural metal products).
Special trade construction involving building installation and completion (finishing) are classified in class 4530 and 4540, respectively.
Architectural and engineering activities are classified in class 7421 (Architectural and engineering activities and related technical consultancy).
Project management for constructions is also classified in class 7421.

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