A building reaches practical completion when the work is substantially done and the property can be safely used as intended, with only small items outstanding that do not stop occupation. It is a contract milestone rather than a promise of perfection.
The certificate and inspection
On a construction contract, the architect, engineer or other contract administrator inspects the works and, if satisfied, issues a practical completion certificate. That date usually starts the defects liability period, releases part of any retention held from the contractor, and shifts insurance and security responsibilities to the owner. In off-plan sales, the developer’s notice that a unit is complete often triggers the buyer’s obligation to pay the balance of the price within a set time, so the definition of completion in the agreement for sale deserves close reading.
Separate from the contract certificate, the local municipal corporation may need to inspect and approve the building for occupation, and utility connections must be in place.
Tips for buyers
Attend or arrange an independent inspection before accepting a unit as complete, and record outstanding items in writing as a snag list. Paying the final balance is much easier to delay before money changes hands than to use as leverage afterwards.
Under UK JCT contracts the term is identical; US contracts tend to say substantial completion.
Related terms: Snagging, Handover, Retentions, Warranty period, Off-plan Purchase, Defect log.
Accurate as at October 2026.
