How long does it take to get building plans in Brisbane?

The overall timeline: from idea to building approval

Most homeowners underestimate how long the full process takes from deciding to build a carport, deck or room extension to having a building approval in hand. The process has several stages, each with its own timeline:

In total, most straightforward residential projects move from initial enquiry to building approval within 4–7 weeks, depending on how quickly site information is provided and how busy the certifier is.

Carport plan turnaround times

Carport plans are typically the fastest to produce because the scope is well defined and the documentation set is relatively compact. With Plan Draft, carport plans are produced in 10–15 business days from receipt of all required site information and a signed fee agreement.

The most common cause of delay is waiting for existing house plans or a current title survey. If you can provide these upfront, the job moves faster. View the carport plans service.

Patio and deck plan turnaround times

Patio and deck plans are similar in turnaround to carport plans, typically 10–15 business days with Plan Draft. Elevated decks with stairs and balustrades may take slightly longer due to the additional framing detail required.

Roofed patios that connect to the existing house take a little more time than open decks, but are still within the 10–15 business day window for standard configurations. View the patio plans service.

Room extension plan turnaround times

Room extensions take a little longer, typically 15–20 business days with Plan Draft. The additional time reflects the greater complexity of documenting a new room that connects to the existing structure: existing house context, roof connection, structural elements, sections and full elevations.

Having existing house plans available at the start is particularly important for room extensions, it removes the need for site measurement or council records requests, both of which add time to the process.

View the room extension plans service.

What causes delays, and how to avoid them

The most common causes of plan drawing delays are:

Incomplete site information: Missing house plans, outdated surveys or unclear site photos all slow the process down. Providing complete information at the start is the single most effective way to keep things on track.

Scope changes: Changing the design after drawing has started requires rework. Being clear about what you want before signing off on scope reduces this risk significantly.

Extended revision rounds: Most projects are resolved within the included revision round. Additional revision rounds add time, usually 3–5 business days per round.

Overlay or planning issues: If a site has complex overlay conditions that require additional documentation, this adds time. We identify these at suitability review so they don’t surprise you mid project.

Common questions