Golden thread document list & checklist
Use this checklist to review golden thread building safety information for a higher-risk building in England. The records needed depend on the building, stage of work and your responsibilities. Tailor the gap check to that scope using the official guidance linked below.
What belongs in the golden thread
For building work, Regulation 31 of the Building (Higher-Risk Buildings Procedures) (England) Regulations 2023 sets out the information that must be held, and previous versions of any updated document remain part of the thread. Each document type has a dedicated guide: drawing register, asset register, O&M manual, fire safety file, compliance certificates and handover pack.
| Stage | Document type | Why it is in the thread |
|---|---|---|
| Design & construction | Gateway 2 submission documents | What was submitted to the Building Safety Regulator for building control approval |
| Approved drawings & specifications | The design as approved, with issue status and revision history | |
| Fire safety strategy & structural design | The safety-critical design decisions, including calculations and reviews | |
| Change control records | Who changed what and when: the audit trail of the thread itself | |
| RFI log, method statements, inspection & test records, NCRs | The evidence that construction followed the approved design | |
| Completion & handover | As-built drawings | What was actually built, reconciled against the approved design |
| Operation & maintenance (O&M) manuals | How the building's systems and equipment are to be operated and maintained | |
| Building safety case report & resident information | The safety case documents and resident engagement information required at completion | |
| Gateway 3 / completion certificate documents | The records submitted to confirm the building work meets the requirements | |
| Occupation | Safety case & building safety case report | The ongoing assessment of how the building's safety is managed |
| Fire risk assessments & inspection/test logs | Current safety condition evidence, kept up to date | |
| Compliance certificates (gas, electrical, fire alarm, lifts, ventilation) | Certificates with dates, issuing bodies and expiry tracking | |
| Asset registers & maintenance records | What equipment exists, where, and its maintenance history | |
| Mandatory occurrence reports | Safety occurrences reported to the regulator, with follow-up | |
| Safety-related complaints & resident engagement records | What residents have raised about safety, and what was done |
Sources: SI 2023/909, Part 4 (regs 31–38); GOV.UK, keeping information about a higher-risk building; Building Safety Alliance, prescribed information and documents table; CLC, Delivering the golden thread (PDF).
Contextualise the list to your building
The Building Safety Alliance, which maintains the industry's prescribed information table, is explicit: the list must be contextualised to the building, because not all information is needed for every building. A 1970s block with no gas supply will not need gas certificates; a building with a passenger lift will need its test and maintenance records.
Use this checklist as a gap-check starting point: go through it against what you actually hold, flag what is missing, and record why anything does not apply. That record of the gap-check itself is valuable evidence of reasonable enquiries.
Missing records: the retrospective duty
For buildings already in use, the duty under section 88(3) of the Building Safety Act 2022 is to obtain the information you do not hold, except where that is not practicable. That means:
- Make reasonable enquiries - past contractors, managing agents, insurers, the original local authority records
- Keep everything you find, however incomplete - a partial record is part of the thread
- Record the gaps and the effort made to fill them
- Structure what you have into the checklist above so the regulator can see the state of the thread at a glance
The Building Safety Regulator has said it expects reasonable enquiries for legacy buildings, not perfect historical records. What it does expect is that the information you hold is findable, current and version-controlled.
From a pile of files to a golden thread
Most dutyholders hold the documents; they are scattered, inconsistently named, and lack version history and an index. That is a processing problem, and it is what we do:
- Receive - we review supplied digital scans, PDFs and exports
- Structure & index - consistent naming, folder structure, and a document register with metadata
- Validate - gaps flagged against the checklist above, duplicates removed, versions reconciled
- Deliver - an indexed register and manifest you can hand to the regulator or load into your CDE
Every project is scoped and quoted individually before any work begins.
Checklist questions, answered
Do we need every document on this list?
No. The Building Safety Alliance, which maintains the prescribed information table for the industry, is clear that the list must be contextualised to the building: not all information is needed for every building. Use the list as a gap-check starting point, then tailor it to your building's construction, systems and residents.
Where must the golden thread be stored?
The regulations require an electronic facility that is secure from unauthorised access, with change control that records who changed what and when. It can be one system or several, but the information must remain accurate, up to date and available to those who need it.
Who maintains the golden thread after handover?
Once a higher-risk building is occupied, the accountable person (and principal accountable person where there is more than one) must keep the prescribed information up to date and obtain anything they do not hold, except where that is not practicable.
What if documents are missing for an existing building?
Section 88(3) of the Building Safety Act 2022 requires you to obtain the information you do not hold unless it is not practicable to do so. Make reasonable enquiries, keep everything you find, and record the gaps. The Building Safety Regulator expects reasonable enquiries for legacy buildings, not perfect historical records.
Do previous versions of documents count as part of the thread?
Yes. Regulation 31 of the 2023 procedures regulations is explicit: golden thread information includes previous versions of any document which has been updated. Version history and change control are not optional extras.
Related guides
- What is the golden thread? - the requirement and who it applies to
- Our data processing services - structuring, indexing and validating golden thread records
- Golden thread compliance: the enforcement data
Not sure what you hold vs what you need?
Send us your file inventory and we'll gap-check it against this checklist, free, as part of your quote.