Approved Document B: Fire safety — Volumes 1 & 2 (2019 edition incorporating 2020, 2022 and 2025 amendments). Further amendments take effect 30 September 2026.

Approved Document B: Fire safety — Volumes 1 & 2 (2019 edition incorporating 2020, 2022 and 2025 amendments). Further amendments take effect 30 September 2026.. Statutory guidance issued under the Building Regulations 2010 (England). The current published edition is the 2019 edition incorporating the 2020, 2022 and 2025 amendments (Circular 01/2025, 2 March 2025). A further amendment booklet has been published with provisions taking effect on 30 September 2026 (e.g. second-staircase threshold for residential buildings ≥18 m). This page provides a structured summary, key provisions, and practical guidance on the application of Approved Document B (2025 Amendments) to UK fire safety engineering, building design, and Building Safety Act compliance.