What Part 5 covers
Part 5 of the Building Safety Act addresses remediation and leaseholder protections for relevant buildings. The height and storey thresholds used for Part 5 protection can differ from the higher-risk building definition that drives Part 4 occupied duties — do not assume the regimes are identical.
Landlords and managing agents need accurate qualifying-lease data, contribution calculations under Schedule 8 where they apply, and auditable remediation records for residents, lenders, and the courts.
Caps, defects and remediation orders
Who Part 5 protects
Part 5 of the Building Safety Act creates leaseholder protections and remediation pathways for relevant buildings — including height/storey thresholds that differ from the HRB definition used for Part 4.
Schedule 8 caps
Schedule 8 sets out capped contributions for qualifying leases in prescribed circumstances. Duty-holders need accurate qualifying-lease registers and cap calculations — not spreadsheet folklore.
Relevant defects & orders
Relevant defects, remediation orders, and related landlord documentation (including certificate workflows) must be tracked with audit trails for residents, lenders, and regulators.
Alongside Part 4
Portfolio landlords often manage both Part 4 HRB duties and Part 5 remediation on overlapping estates. Keep the regimes distinct in process and evidence.
- Qualifying-lease registers with named ownership and evidence
- Schedule 8 contribution tracking where caps apply
- Relevant defect and remediation-order workflows with audit trails
- Certificate and landlord documentation packs retained for challenge
Common Part 5 traps
- Applying HRB Part 4 processes to Part 5 buildings without checking thresholds
- Spreadsheet qualifying-lease lists without evidential ownership trails
- Schedule 8 caps calculated inconsistently across a portfolio
- Remediation orders and landlord certificates scattered across email and shared drives
- Residents and lenders unable to obtain a coherent remediation narrative
See also the BSA guides hub for Part 4 occupied pillars.
Keep Part 5 distinct from Part 4
Many portfolios mix Part 4 HRB duties with Part 5 remediation. Use separate processes and evidence trees. Occupied Part 4 pillars include KBI, safety case, and BAC.
How Threadsovereign covers Part 5
Qualifying-lease and remediation tracking sits alongside occupied AP workflows for portfolios that carry both regimes. Soft product path: Accountable Person software · Full platform capabilities.
Primary sources
FAQ
Cochise Derrick
Founder & Director
Cochise Derrick is the founder and director of Threadsovereign Ltd and the sole architect and developer of the Threadsovereign platform. With a background as a lead developer on central government digital services and current SC clearance, he brings the technical depth and regulatory understanding required to build compliance infrastructure that duty-holders can genuinely rely on. Threadsovereign is the result of over a year of focused development against the Building Safety Act 2022 and its statutory instruments.
Areas of focus
Implement this in Threadsovereign
Statutory workflows sit on every paid plan. Prepare and evidence in-platform; file on the official BSR portal.