The 5 Biggest Compliance Mistakes Principal Designers Make Under the BSA 2022

Mistake 1: Late or informal appointment

The Principal Designer must be appointed in writing before design work begins. Informal arrangements or late appointments create gaps in accountability that surface at Gateway 2.

Fix: issue and file the appointment at project kick-off, with competence declarations and scope boundaries documented.

Mistake 2: HRB status assumed, not confirmed

Misclassifying a building affects gateway obligations, golden thread scope, and resident engagement duties. Teams sometimes proceed on client assumptions without documented analysis.

Fix: record the HRB determination rationale early and revisit if height, residential use, or scope changes.

Mistake 3: Information scattered across tools

Email threads, personal drives, and contractor portals are not a golden thread. Version conflicts and missing audit trails are common findings when packs are assembled under pressure.

Fix: agree a single information environment with naming conventions, version control, and named owners for each information type.

Mistake 4: Design changes bypass safety review

Substitutions and value engineering near procurement often skip structured safety impact assessment. The site build then diverges from the Gateway 2 narrative.

Fix: route all safety-critical changes through a recorded review with fire and structural input where needed.

Mistake 5: Handover treated as an afterthought

Gateway 3 and occupation require as-built evidence that matches design intent. Principal Designers who disengage at PC leave the Accountable Person with an incomplete safety case.

Fix: define handover information requirements at Gateway 2 and track closure through practical completion.

Conclusion

Principal Designer compliance is largely about information discipline and early coordination. Avoiding these five mistakes protects your client, your practice, and the residents who will occupy the building.