Practical completion
The legal moment a residential build is considered finished, even if minor defects remain. Practical completion triggers the final progress payment, the start of the defects liability period, and the owner's right to take possession.
Definition
Practical completion is the point at which a residential build is considered functionally finished and fit for occupation, even if minor defects or finishing items remain outstanding. It is a legal moment defined in the building contract, not a moment of actual perfection.
Why it matters
Practical completion is the contractual transition that determines when several important things happen at the same time. The owner becomes entitled to take possession of the property. The final progress payment falls due. The defects liability period begins. The risk of damage to the property typically transfers from the builder to the owner. The retention amount remains held but starts ticking toward release. Disputes about whether practical completion has been reached are common and consequential. A builder who claims practical completion has been reached can demand the final payment. An owner who disputes that claim can refuse the payment. Many residential disputes hinge on the answer.
How it works in practice
The standard process: the builder issues a notice of practical completion when they believe the build has reached the contractual threshold. The owner inspects the property, usually with an independent inspector, and either accepts the notice or responds with a list of defects that must be rectified before practical completion can be agreed.
If the owner accepts, the build is at practical completion. The final progress payment becomes due, less the retention amount. The defects liability period begins. The owner can move in.
If the owner disputes, the contract typically defines a process: the builder rectifies the defects, the owner re-inspects, and the cycle repeats until practical completion is agreed or the parties escalate.
Standard contracts (HIA, MBA) include their own definitions of practical completion, usually involving language like "fit for use" or "substantially complete" with minor defects allowed. State legislation provides additional context but rarely overrides the contract definition.
Common misconceptions
Practical completion means the build is finished
It means the build is finished enough. Minor defects, snagging items, and finishing work commonly remain outstanding at practical completion and are addressed during the defects liability period.
The owner can refuse practical completion until everything is perfect
Not under most contracts. The owner can refuse for genuine defects but cannot indefinitely delay practical completion over minor items. Disputes over whether items are "minor" often go to the relevant state tribunal.
The final payment can be withheld until every defect is fixed
The retention amount is the lever for defect rectification. The main final payment is due at practical completion, with retention released later.