What is construction of buildings in ISIC Rev. 5?

Construction of buildings in ISIC Rev. 5, published by the UN Statistics Division, covers building complete structures intended for homes, offices, shops, schools, hospitals and other uses. It includes new building, major alteration and the assembly of prefabricated buildings on site, where the result is a complete building ready for use. The activity is defined by the outcome, a finished building, rather than by a single trade such as bricklaying or roofing. Any code for a particular project or firm must be confirmed with the national statistical institute or business register that holds the record.

What makes a project a complete building rather than a single trade job?

A single trade can be excellent and still not be construction of buildings in this sense. Bricklaying raises walls. Roofing keeps weather out. Plastering smooths an interior. Each trade contributes, and none of them alone delivers a building that people can move into and use. The grouping described here looks for the finished whole: walls, roof, partitions, services and finishes brought together until the structure is ready for its intended use, whether that use is living, working, shopping, learning or receiving care.

That outcome test also explains why the description covers more than brand new building. A major alteration that substantially rebuilds a building can produce, in effect, a renewed complete building, and the assembly of a prefabricated building on site can produce one too, even though much of its fabric was made elsewhere first. In both cases the site work ends with a complete building ready for use, and that ending is what matters for the description, not whether every brick was laid by hand on that plot.

How does a school shell become a finished building in the description?

Follow the school example from the original guide and watch the outcome take shape. A firm erects the structure, so the school has a frame and floors. It adds the roof, so the interior is protected. It builds the internal partitions, so classrooms, corridors and halls appear where open space stood before. At that point the project has moved from a collection of trade jobs to a building, and the description fits because the result can be handed over as a school.

Contrast that with the firm that only cleans the school after opening. Its staff work in the same corridors and classrooms, they may arrive every day for years, and the school could not run well without them. Their work still does not create, alter or complete the building, so it is a service activity rather than construction. Sharing a building with construction does not make a job construction, just as working on a building site for a day does not turn a delivery driver into a builder. The description turns on the result of the work.

Which kinds of building work belong in this grouping?

The table below gathers the kinds of work described in ISIC Rev. 5, published by the UN Statistics Division, as part of this grouping. Read each row as an example of the outcome test at work, not as a full code list, because the publication itself gives the authoritative detail.

Kind of work	How the outcome test applies
Construction of residential buildings	Ends with a home ready for people to live in
Construction of non residential buildings	Ends with a shop, office, school, hospital or other building ready for its use
Major renovation that substantially rebuilds a building	Ends with a building renewed so thoroughly that it counts as rebuilt
Assembly of prefabricated buildings on site	Ends with a complete building put together on its plot
Construction work by developers who build for sale where described in Rev. 5	Ends with a complete building built for sale, where the Rev. 5 description covers that work

For context, ISIC Rev. 5, published by the UN Statistics Division, contains 22 sections from A to V, 87 divisions, 258 groups and 463 classes, and construction of buildings sits inside that tree as one branch among many.

When does building work end and selling, letting or cleaning begin?

Building ends, for this description, when the complete building exists. Selling it afterwards is a different activity, even if the same firm sells what it built. Renting it out afterwards is a different activity too, and maintaining it as a facility service, with cleaning, caretaking and day to day running, is different again. Each later phase has its own description elsewhere in ISIC Rev. 5, published by the UN Statistics Division, and each phase is counted where its own work belongs.

Every code statement above rests on the UN Statistics Division classification detail and the ISIC Rev. 5 publication listed in the frontmatter, and those sources carry the full class wording that this guide summarises.

No sentence here can fix a reader’s code, principal activity or registration for a house, a school, a shop or any other building, because this is statistical description only, and a formal answer for a real firm or project belongs with the national statistical institute or business register that holds the record.