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Building Safety Act 2022: A Complete Guide for Architects

A comprehensive guide to the Building Safety Act 2022 covering the new regulatory framework, principal designer duties, the golden thread of information, and the three-gateway regime.

25 February 2026Editorial TeamSource: Building Safety Act 2022 / BSR

The Building Safety Act 2022 (BSA) represents the most significant overhaul of building safety regulation in the UK since the Health and Safety at Work Act 1974.

Scope: Higher-Risk Buildings

HRBs are buildings that are at least 18 metres high OR have at least 7 storeys, AND contain at least 2 residential units.

The Three-Gateway Regime

Gateway 1 — Planning Stage

The Building Safety Regulator (BSR) is a statutory consultee on planning applications for HRBs. Applications must demonstrate fire safety considerations.

Gateway 2 — Pre-Construction

Full design documentation must be submitted to and approved by the BSR before works commence. The Principal Designer coordinates the submission.

Gateway 3 — Completion

Before occupation, the Principal Contractor must submit a completion certificate to the BSR.

The Golden Thread of Information

Accurate, up-to-date building information must be created, maintained, and handed over throughout the building's life, including as-built drawings, fire safety specifications, and the Building Safety Case Register.

Principal Designer Duties

The BSA Principal Designer must plan, manage, monitor, and coordinate design work to ensure compliance; prepare Gateway 2 documentation; and notify the BSR of design changes.

Accountable Person and Building Safety Manager

In occupation, HRBs must have an Accountable Person with legal safety obligations, and a Building Safety Manager managing day-to-day safety.