On 19 December 2025 the Building Safety Regulator issued a letter to all building owners and principal accountable persons (PAPs).
(As a reminder, a PAP applies where a building is a higher-risk building (HRB)—meaning it is at least 18 metres tall or has seven or more storeys, whichever is the lower, and has two or more residential units.)
The BSR’s letter, which covers residential and mixed-use buildings, warns of potential structural risks with reinforced-concrete transfer slabs.
The BSR has urged building owners and PAPs to act by:
- Making sure they understand whether any of their buildings contain transfer slabs;
- Taking proportionate steps to carry out an assessment; and
- Seeking expert structural advice if there are visible signs of distress or design concerns
The BSR has confirmed that further guidance will follow, but in the meantime it has advised building owners and PAPs to stay informed.
Read the official BSR letter here:
Our content explained
Every piece of content we create is correct on the date it’s published but please don’t rely on it as legal advice. If you’d like to speak to us about your own legal requirements, please contact one of our expert lawyers.