Introduction — Defects Liability & Post-Occupancy

Section 1

Purpose

Note on JCT editions: JCT has published the 2024 Edition. This guidance cites JCT SBC/Q 2016 clause references; the commercial and payment mechanisms are substantively unchanged in the 2024 edition, but specific clause references should be verified against the contract edition in use on any given project.

Stage 7 — Defects Liability & Post-Occupancy — covers the period between Practical Completion and the issue of the Final Certificate, during which the contractor's Rectification Period runs, defects are identified and rectified, the Certificate of Making Good is issued, and the building enters post-occupancy operation. The QS's role at this stage focuses on managing the financial and contractual aspects of the defects process, monitoring lifecycle cost performance against NRM3 estimates, conducting post-occupancy evaluation (POE), and ensuring the project's close-out is fully documented.

This guidance note provides the overview for Stage 7 practitioners. It sets out the professional framework — grounded in the RICS Black Book suite, NRM3, and relevant RIBA Stage 7 obligations — and cross-references the detailed topic notes (GN-DL-01 to GN-DL-05). The QS at this stage must balance the active management of the defects process with the forward-looking obligations of post-occupancy evaluation and lifecycle cost benchmarking.

Stage 7 is often undervalued as a 'post-project' administrative stage, but it carries significant professional and financial risks. Errors in Rectification Period management — premature release of retention, failure to notify defects before the Rectification Period expires, or inadequate records of contractor non-compliance — can result in unrecoverable financial losses for clients and professional indemnity exposure for the QS.

Section 2

Key Principles

RICS Defects and Rectifications (2nd edition, August 2024): the Rectification Period is the contractor's right to return and rectify; the QS must ensure the employer honours this right while protecting the employer's financial position through retention and defect cost assessment.
JCT SBC/Q 2016 clauses 2.38–2.39: the Architect/Contract Administrator may issue instructions requiring defects to be made good; once all instructed defects are made good, they issue the Certificate of Making Good (clause 2.39); that certificate triggers release of the second moiety of retention under clause 4.19.
NRM3 Order of Cost Estimating and Cost Planning for Building Maintenance Works (2022 ed.): provides the framework for lifecycle cost planning and the basis for comparing post-occupancy maintenance costs against pre-contract estimates.
RICS Lessons Learned (1st ed., April 2016): post-occupancy is the stage at which the most valuable lessons learned are available — actual building performance against design intent can now be measured.
RICS Defining Completion of Construction Works (1st edition, July 2011; reissued August 2024 as RICS practice information): latent defects remain recoverable within the limitation period (6/12 years) even after the Certificate of Making Good is issued; the QS should advise the client of continuing obligations.
RIBA Plan of Work Stage 7 (Post Occupancy Evaluation): RIBA requires a formal POE at Stage 7 to assess building performance; the QS contributes the cost performance assessment as part of the POE.

Section 3

Practical Application

Step 1

At the start of the Rectification Period, confirm the Rectification Period end date in writing to all parties; set a mid-term review meeting to assess defect progress; set a reminder for the final inspection before Rectification Period expires.

Step 2

Maintain and update the Schedule of Defects throughout the Rectification Period — record all notifications, contractor responses, and sign-offs; the schedule is the primary audit trail for defects management.

Step 3

At the mid-point of the Rectification Period, assess outstanding defects and identify any patterns — repeated failures in the same element may indicate a systemic issue (workmanship, materials, or design) requiring specialist investigation.

Step 4

Conduct the inspection held shortly before the Rectification Period expires with the CA and design team; ensure all outstanding defects are formally notified before the Rectification Period end date; issue the final defects list promptly.

Step 5

Once all defects are made good, confirm the CA issues the Certificate of Making Good; instruct the second moiety retention release promptly via a HGCRA-compliant payment notice.

Step 6

Contribute to the Post-Occupancy Evaluation — provide cost performance data: actual maintenance costs in year 1 vs NRM3 lifecycle cost estimate; any significant defects costs; energy costs vs design intent.

Step 7

Review the NRM3 lifecycle cost plan in light of actual post-occupancy performance; update future cost plans for similar projects based on actual data; submit findings to the firm's knowledge base.

Section 4

Common Mistakes to Avoid

Treating Stage 7 as purely administrative — the defects process has significant financial consequences and requires active QS management throughout the Rectification Period.
Allowing the Rectification Period to expire without a final inspection — once the Rectification Period expires and the Certificate of Making Good is issued, the contractor's contractual obligation to rectify is discharged; late defects must be pursued under common law.
Releasing the second moiety retention before the Certificate of Making Good is issued — premature release destroys the financial incentive for the contractor to return and make good outstanding defects.
Failing to contribute to the Post-Occupancy Evaluation — POE is now a RIBA Stage 7 obligation and is increasingly expected by clients as part of the QS's professional service.
Not updating lifecycle cost estimates based on actual post-occupancy data — the NRM3 lifecycle cost plan is only valuable if it is calibrated against actual building performance; failing to do so perpetuates inaccurate forecasts.

Section 5

APC Competency & Quick Reference

Contract Practice Level 3 — Rectification Period management, Certificate of Making Good, retention release
Asset Management Level 2 — lifecycle cost management, NRM3, post-occupancy evaluation

What is the QS's financial role during the Rectification Period?

Managing the retention position (ensuring the second moiety is not released prematurely); assessing the cost of defects not rectified by the contractor for potential deduction; monitoring the Schedule of Defects; advising the client on commercial settlement where the contractor refuses to rectify. The QS does not inspect defects — that is the CA's role — but the QS manages the financial consequences.

What is the relationship between the Certificate of Making Good, the second moiety retention release, and the Final Certificate?

The Certificate of Making Good (issued by the Architect/Contract Administrator under JCT SBC/Q 2016 clause 2.39) certifies that all instructed defects have been made good. This triggers release of the second moiety of retention (clause 4.19). Once the Contract Sum has been adjusted under clause 4.25, the Architect/Contract Administrator issues the Final Certificate not later than 2 months after the latest of the end of the Rectification Period, the Certificate of Making Good, and the date the clause 4.25.2 statements were sent (clause 4.26). Under clause 1.9 the Final Certificate is conclusive unless proceedings are commenced before it is issued or within 28 days after it.

What is Post-Occupancy Evaluation and why should the QS contribute to it?

POE is the structured assessment of a building's performance in use against the design intent — covering energy use, user satisfaction, maintenance costs, and operational performance. The QS contributes the cost performance element: comparing actual maintenance costs and defect remediation costs in year 1 against the NRM3 lifecycle cost estimate. POE is a RIBA Stage 7 requirement and increasingly part of the QS's professional service offering.

Section 6

Defects Liability & Post-Occupancy Checklist

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Task

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Rectification Period end date confirmed in writing at start of Rectification Period

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Schedule of Defects maintained throughout Rectification Period

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Mid-term Rectification Period review conducted and defect patterns identified

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Pre-expiry inspection held and final defects list issued

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Certificate of Making Good received before second moiety retention released

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Second moiety retention release payment notice issued

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Post-Occupancy Evaluation contribution prepared (cost performance data)

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NRM3 lifecycle cost plan reviewed against actual post-occupancy data

Section 7

CPD Learning Outcomes

Manage the Rectification Period commercially — maintaining the Schedule of Defects, protecting retention, and advising clients on defect cost recovery — in compliance with RICS Defects and Rectifications (2nd edition, August 2024) and JCT SBC/Q 2016.
Contribute to Post-Occupancy Evaluation by comparing actual cost performance against the NRM3 lifecycle cost estimate and providing year 1 maintenance cost data.
Apply RICS Lessons Learned (1st ed., April 2016) principles to capture Stage 7 project insights and update the firm's lifecycle cost models based on actual post-occupancy performance.

Section 8