Compliance
The Golden Thread of information, explained
A requirement introduced by the Building Safety Act 2022 for higher-risk buildings: an accurate, accessible, up-to-date digital record of the building's design, construction and ongoing safety. Held by the Accountable Person and inspectable by the Building Safety Regulator.
Applies to
- Higher-risk buildings (HRBs): residential buildings 18m or 7 storeys and above with at least two dwellings
- The dutyholders under the BSA: client, principal designer, principal contractor, and post-completion the Accountable Person
Key dates
- April 2023: Building Safety Regulator (BSR) established under the Health and Safety Executive.
- October 2023: Gateway process live: HRB projects need BSR approval at three defined stages.
- April 2024: Golden Thread requirements applied to occupied HRBs.
What the Golden Thread must contain
The Building Safety Regulator has not published a single fixed list, but the intent is clear: everything needed to understand and manage the safety of the building, from design through construction into occupation. In practice this means the fire strategy, structural design, MEP as-builts, product test data, safety case, resident engagement records, and a change log for anything altered after handover.
- Design documents: fire strategy, structural calcs, MEP schematics
- Product data: certifications, test evidence, installer training records
- Construction records: golden-standard photos, sign-offs, deviations from design
- Handover: safety case report, resident engagement strategy
- In-occupation: change log, inspection reports, incident reports
The three principles: accurate, accessible, up-to-date
Accurate: the record reflects the building as actually built, not just as designed. Deviations must be captured.
Accessible: the Accountable Person, the residents, contractors, and the regulator can retrieve what they need. PDFs sitting on a former project manager's laptop do not qualify.
Up-to-date: the record is maintained through the life of the building. When a fire door is replaced, when a sensor is upgraded, when a change is made to the fire strategy, the change is logged.
Why handover is where Golden Threads fail
The single most common failure mode is loss of information at handover. The principal contractor holds the construction record; the freeholder inherits the building. If the record does not transfer in a usable form, the Accountable Person is instantly in breach.
The Regulator has been explicit that a stack of PDFs on a USB stick does not meet the Accessible or Up-to-date tests. There needs to be a live system that survives the change of ownership.
Common questions
Does the Golden Thread apply to non-HRB residential?
The statutory Golden Thread requirement is currently limited to Higher-Risk Buildings. However the principles (accurate, accessible, up-to-date safety information) are being adopted voluntarily on non-HRB schemes because insurers, lenders and buyers increasingly expect it.
Who owns the Golden Thread?
During design and construction, the dutyholders share responsibility (client, principal designer, principal contractor). At completion it passes to the Accountable Person, typically the freeholder or a managing agent. Ownership must be transferable and traceable.
How does Ubrix help build the Golden Thread?
Ubrix captures the plot-level record during construction (photos, sign-offs, product data, deviations) and exports it in a format the Accountable Person can maintain. Because the record is structured, not just filed, updates in occupation slot into the same audit trail.
Take it with you
Full guide as a PDF
The long-form guide includes worked examples, evidence templates and a per-plot checklist. Free, no signup.
Download the Golden Thread guide (PDF)See how Ubrix captures the evidence you need.
Ubrix stores compliance evidence against the plot, not on shared drives. Timestamps, sign-offs and documents come out as an audit trail on demand.