The CCTB explained simply
Updated July 2026
The CCTB (Cahier des Charges Type — Bâtiments) is a Belgian reference that describes and codes construction works. Using it means speaking a common language with architects and administrations, and structuring your take-offs cleanly. It is used notably in Wallonia and in public procurement.
What is the CCTB?
The CCTB is a standard specification for buildings: a structured, coded catalogue of construction works, with their technical descriptions. Rather than rewriting each item in your own way, you rely on common, standardised references.
It serves as a basis for drafting specifications, for both public and private contracts.
What it is for, concretely
- A common language between architect, contractor and administration
- Ready-to-use technical descriptions, precise and recognised
- Structured take-offs, comparable from one company to another
- An expected framework in many public contracts
How it is structured
The CCTB organises works by family, with a hierarchical coding. Each item has a code, a technical description and a unit of measure. This logic makes take-off easier: you quickly find the right item and price it in the right unit.
Should you use it?
In public procurement, relying on the CCTB is often expected, sometimes required. In the private sector it is not mandatory, but very useful: it clarifies the quote, reduces misunderstandings and makes your prices comparable. Many contractors adopt it simply for rigour.
CCTB, CCT, specification: the vocabulary
- Specification: the document describing the works expected on a site
- CCT (standard specification): a reusable reference model
- CCTB: the standard specification specific to buildings
Saving time
Retyping descriptions and codes by hand is tedious. Take-off software with an already-structured CCTB catalogue lets you select items, adjust quantities and price — without starting from a blank page.
Frequently asked questions
What does CCTB mean?+
Cahier des Charges Type — Bâtiments: a Belgian reference that describes and codes construction works, used notably in Wallonia and in public procurement.
Is the CCTB mandatory?+
In public procurement it is often expected or required. In the private sector it is not mandatory but remains very useful for the clarity and comparability of quotes.
What is the difference between the CCTB and a specification?+
A specification describes the works of a specific site. The CCTB is a reusable standard model, specific to buildings, used as a reference to draft those specifications.
Where do I find the CCTB codes?+
They come from the official reference. In practice, take-off software integrates a structured CCTB catalogue, which avoids searching for and retyping codes.
Read also
How to do a take-off per m² (method + example)A compliant construction quote: the template and detailsCost, margin, coefficient: pricing rightA CCTB catalogue, ready to take off
Afrimo integrates a structured CCTB catalogue: select the items, the AI reads your plans, quantities are computed and the quote is generated — in FR/NL/EN.
This article is informational. The CCTB and its use evolve and vary by region and contract: refer to the official reference and the project specification.