Why the Building Safety Act 2022 Has Changed Contract Risk in the UK
The Building Safety Act 2022 (BSA) is the most significant shift in UK construction liability in a generation. For GCs and specialist subcontractors working on higher-risk buildings (HRBs) — structures over 18 metres or seven storeys with at least two residential units — the compliance obligations embedded in project contracts are now legally consequential in ways they simply weren't before. Miss a clause gap, and you're not just looking at a contractual dispute. You're looking at enforcement action from the Building Safety Regulator, potential criminal liability, and remediation costs that can run into the millions.
The problem is that most standard JCT and NEC4 forms weren't drafted with the BSA fully in mind. Amendments are being bolted on by employers and their solicitors, and those amendments vary enormously in quality and risk allocation. A £4.2m residential refurbishment in Birmingham can carry fundamentally different BSA obligations than a comparable scheme in Manchester — depending entirely on how the contract has been drafted. AI-powered contract review is emerging as a practical tool for catching these gaps before you sign.
The Compliance Gaps Most Commonly Missed in JCT and NEC4 Forms
When reviewing BSA-related amendments on standard forms, the same categories of gap appear repeatedly. On JCT Design and Build 2016 contracts, the most common issues involve the Principal Designer and Principal Contractor duty-holder roles introduced under the BSA. Employers frequently insert bespoke clauses purporting to transfer Principal Contractor obligations to the contractor without clearly defining the gateway requirements under the Building Regulations etc. (Amendment) (England) Regulations 2023. That ambiguity is a direct liability risk.
On NEC4 Engineering and Construction Contracts, the issue often sits in the Early Warning and Compensation Event mechanisms. BSA compliance activities — gateway submissions, mandatory inspections, golden thread documentation — generate programme impacts that subcontractors rarely price adequately at tender stage. If the contract hasn't been amended to recognise these as Compensation Events, you're absorbing that cost. As we covered in our guide to avoiding costly contract gaps, ambiguous scope language is where money disappears quietly.
Principal Contractor Duty-Holder: Don't Accept This Without Scrutiny
Some employer amendments attempt to transfer the full Principal Contractor duty-holder role under the BSA to the main contractor via a single bespoke clause. This is not the same as the CDM Principal Contractor role. Accepting it without appropriate insurance cover, resource, and programme allowance can expose your business to regulatory enforcement and unlimited remediation liability. Always get this clause reviewed independently before signing.
What BSA Compliance Language Actually Looks Like in Practice
The clause language being inserted into contracts right now ranges from well-drafted to genuinely dangerous. Here is an example of the type of provision that should trigger an immediate red flag during any contract review:
This clause attempts to make BSR review delays — which are entirely outside the contractor's control and can currently run 8–12 weeks — a contractor risk with no entitlement to time or money. Under the Housing Grants Construction and Regeneration Act 1996, payment rights can't be waived, but programme and cost entitlements absolutely can be contracted away. This is exactly the kind of clause that every GC should be red-lining before execution.
Spot BSA Compliance Gaps Before You Sign
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Adjudication Rights and Payment Notices Under the BSA Framework
One area where contractors consistently underestimate their exposure is the interaction between BSA compliance obligations and the statutory payment regime under the Housing Grants Construction and Regeneration Act 1996. Gateway delays and mandatory stop notices issued by the Building Safety Regulator can disrupt cashflow dramatically. If your contract doesn't include clear provisions for interim payment entitlement during BSA-mandated hold periods, you may find yourself funding months of standing time with no mechanism for recovery.
Adjudication remains the primary dispute resolution route for UK construction contracts, and BSA-related disputes are already appearing in adjudication proceedings. The key battleground is whether gateway-related delays constitute Relevant Events or Compensation Events under JCT and NEC4 respectively. If your contract is silent, the default position almost always favours the employer. For specialist subcontractors in particular — fire stopping, structural steel, cladding — the BSA compliance obligations now embedded in tier-two and tier-three subcontracts deserve the same scrutiny as the main contract. As detailed in our post on AI in construction contract risk management, the risk doesn't stop at the GC level.
Best Practice: Require BSA Compliance Schedules in All HRB Subcontracts
For any higher-risk building project, attach a BSA Compliance Schedule as a contract document. It should define duty-holder roles, golden thread responsibilities, gateway submission obligations, and — critically — the time and cost consequences of BSR-driven delays. This protects both the GC and the supply chain, and gives a clear evidential basis for any future adjudication claim.
The Bottom Line
The Building Safety Act 2022 has introduced a layer of contractual complexity that standard JCT and NEC4 forms weren't built to handle cleanly. Bespoke amendments are being drafted at pace, quality varies enormously, and the financial consequences of accepting poorly constructed clauses — particularly around duty-holder obligations, gateway delays, and golden thread requirements — are material. A £500,000 cladding subcontract on an HRB can carry BSA compliance obligations that, if unpriced and unallocated in the contract, translate into six-figure losses.
AI-powered contract review doesn't replace specialist legal advice on the most complex BSA questions, but it is highly effective at surfacing the clause-level gaps and risk flags that need escalation before you commit. Uploading a contract to Trueleveler's Contract Review engine takes minutes and returns actionable analysis — identifying risky provisions, missing entitlements, and negotiation points — before you're locked in. In a regulatory environment this consequential, that kind of early visibility isn't optional. It's basic commercial discipline.