Already built

Retrospective carport approval in WA

Short answer

An unapproved carport can usually be approved afterwards. If it breaks a planning rule, such as the front setback, retrospective planning approval comes first. Then a registered building surveyor certifies it and your council issues a Building Approval Certificate.

Last updated 29 October 2026

Unapproved carports are common

Carports are often added years after a house is built, and plenty went up without a permit. They usually come to light when the house is sold, when a council notices them, or when an insurer asks.

How it works

  1. We check the carport and council records. Photos, measurements and what your council has on file.
  2. As-built plans. We draw the carport as it stands, with a site plan showing setbacks from the street and boundaries.
  3. Planning approval, if needed. If the carport is closer to the street or wider than the rules allow, retrospective planning approval comes first.
  4. Surveyor inspection. A registered building surveyor checks the structure and issues a Certificate of Building Compliance.
  5. Building Approval Certificate. We lodge the application with your council, which issues the certificate.

Common issues

  • Front setback. The most common planning issue with older carports.
  • Tie-downs and footings. The surveyor needs to see how the posts are fixed down.
  • Doors added later. A solid roller door may need to come off, or the structure assessed as a garage.

Questions

Common questions

Will the council make me remove my carport?

Rarely, if it is structurally sound. Planning problems are usually solved with approval or small changes. Removal is a last resort.

How long does retrospective carport approval take?

About four to eight weeks without planning approval. If planning approval is needed, allow several more weeks.

Selling with an unapproved carport?

Send us photos and your address. We tell you what's involved and give you a fixed price.

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