Insights — Compliance
Building Safety Act 2022: Golden Thread compliance.
The Building Safety Act 2022 changed the relationship between buildings and their information. For higher-risk buildings, accurate, accessible, up-to-date digital information is now a legal duty — not a nice-to-have. Here is what the Golden Thread means in practice, and how to get there.
What is the Golden Thread?
The Golden Thread is the digital record of the information needed to understand a building and keep it safe — its design, its construction, and how it is managed through occupation. The principle, set out in the wake of the Grenfell Tower tragedy and Dame Judith Hackitt’s Building a Safer Future review, is simple: the right people should be able to find the right information about a building at the right time, and trust that it is correct.
Under the Building Safety Act 2022 and its secondary legislation, dutyholders for higher-risk buildings — broadly, residential buildings of at least 18 metres or seven storeys — must create the Golden Thread from the outset of a project, keep it current through design and construction, and hand it over to the accountable person who manages the building in occupation.
Why most estates aren’t ready
The hard truth is that most existing building records were never designed to carry this weight. Typical estate documentation is a mixture of superseded drawings, scanned O&M manuals, spreadsheets of uncertain provenance, and knowledge held in the heads of long-serving staff. Three failures recur:
- Accuracy: drawings that no longer match the building after decades of alterations
- Accessibility: information scattered across drives, filing cabinets and inboxes
- Auditability: no way to demonstrate when information was captured, by whom, or to what standard
A Golden Thread built on inaccurate base data is worse than none at all — it lends false confidence to safety-critical decisions.
Where reality capture fits
This is why we argue the Golden Thread starts with capture, not software. Before information can be managed, it has to be true. Reality capture — terrestrial laser scanning, UAV survey and photogrammetry — establishes a verified record of what is actually built: geometry, condition, and the location of safety-critical elements. From that foundation:
- As-built drawings and models can be corrected or recreated with measurable confidence
- Fire safety information can be located against real geometry rather than assumed layouts
- Future changes can be recorded against a trusted baseline, keeping the thread intact
Structure it once, to a standard
Capture solves accuracy; standards solve accessibility and auditability. ISO 19650 — the UK-adopted international standard for information management — provides the framework: defined information requirements, a common data environment (CDE) with controlled workflows, and named responsibility for every information deliverable. Information captured to a known standard, structured to ISO 19650 and held in a managed CDE is, in substance, a Golden Thread.
Our advice to estates teams is consistent: define your information requirements before commissioning any survey; insist that survey deliverables arrive structured, named and geo-referenced to your standard; and treat the CDE as the single source of truth from day one — not a project archive assembled at handover.
Practical first steps
- Identify which of your buildings fall within the higher-risk regime, and audit the state of their current records
- Prioritise capture where records are weakest and risk is highest — typically older, altered buildings
- Establish information requirements and naming conventions (ISO 19650) before procurement
- Choose capture methods to match need: full scan-to-BIM where models are required; 360° virtual records where visual evidence suffices
- Plan for maintenance of the thread — a survey is a snapshot; the duty is continuous
Every Greybox dataset is captured to a known standard, structured to ISO 19650 and auditable from day one — which is precisely what the Golden Thread asks of you. If you are working out where to start with your estate, we are happy to talk it through.