Key Building Information (KBI)

In short: Key Building Information (KBI) is a defined set of facts about a higher-risk building that the principal accountable person must give to the Building Safety Regulator shortly after registering the building. It gives the Regulator a consistent picture of each building's characteristics and helps it understand the risk profile of the buildings in scope.

What KBI covers

KBI is factual information about the building, including things such as:

• its height and number of storeys, and the number of residential units;
• the building's use and the year it was built;
• the structure and external wall construction, including materials and insulation;
• roof construction;
• fire and smoke control measures - for example alarms, sprinklers and ventilation;
• staircases and energy/fuel supplies.

When it is provided

KBI is submitted to the Building Safety Regulator as part of getting the building into the new regime - after the building is registered, within the timeframe set by the regulations. It is not a one-off form to forget: if the building changes, the information must be kept up to date.

Why it matters

KBI underpins the Regulator's understanding of your building and connects to your wider duties. The same facts sit at the heart of your golden thread and inform your safety case report, so getting them accurate and keeping them current matters well beyond the initial submission.

How CTS helps

CTS gathers and verifies your Key Building Information, submits it correctly, and holds it - accurate and up to date - within your golden thread on the CTS BuildSafe platform, so it stays consistent with your registration, KBI and safety case.

General information, not legal advice. Reviewed by the CTS building safety team.