Understanding when you need a building permit or council approval in Perth is essential before starting any home improvement project. From patios and carports to granny flats, getting this step right keeps your build legal, safe, and stress-free. This guide breaks down Perth building permits, council approval requirements, timelines, and costs.
Building Permits vs Council (Planning) Approval
A building permit confirms that your project meets the National Construction Code’s structural, safety, and construction standards. A planning (or council) approval checks your project against zoning, setbacks, site coverage, and design rules.
According to the City of Perth, you will need one of two building permit types:
- Certified (BA1): Faster approval, usually around 10 business days, but requires a private building surveyor to certify compliance.
- Uncertified (BA2): Lodged directly with the local government, slightly longer processing time.
Planning approval may not be required if your project complies with WA’s Residential Design Codes (R Codes), but you still need a building permit.
Granny Flats and 2024 Approval Reforms
In April 2024, WA updated the R Codes to make granny flats easier to build. According to the WA Government media statement:
- Lot size minimums, previously 350 m², were removed.
- Granny flats up to 70 m² that meet deemed to comply rules no longer need planning approval.
- Parking requirements have been relaxed, saving space and cost.
Even if planning approval is exempt, a building permit is mandatory. This ensures your Perth granny flat is built safely and to code.
Do Patios Need Council Approval?
Patios are considered Class 10a structures and generally need a building permit. Whether you need planning approval depends on size, height, and setbacks. If your design complies with R Codes, you may avoid additional council planning steps.
Popular options like a gable roof patio in Perth or a flat patio in Perth must still be assessed for wind loads and structural integrity.
Using experienced Perth patio builders ensures plans meet requirements before submission.
Carports and Outdoor Structures
Carports, sheds, and pergolas often require a building permit. If you plan to integrate a carport with your granny flat or patio, it is best to apply for both at once. Working with carport builders in Perth can help avoid double fees and delays.
What Documentation Will You Need
Typical documentation includes:
- Site plan showing setbacks and dimensions
- Elevation drawings
- Engineering certification for footings and roof structures
- Energy efficiency compliance (for habitable rooms like granny flats)
- BAL assessment if in a bushfire zone
Timelines and Costs
- Certified building permit: about 10 business days once lodged.
- Uncertified building permit: about 25 business days.
- Planning approval: when required, typically adds 4 to 6 weeks.
Costs vary by council, but expect:
| Project Type | Typical Permit/Approval Cost | Notes |
| Patio or Carport | $500 to $1,500 | Includes building permit and engineering drawings |
| Granny Flat (70 m²) | $2,500 to $7,500 | Includes planning approval if needed, plus building permit |
| Variations / Special Reports | $500 to $2,000 | BAL, stormwater management, or engineering reports |
Step-by-Step Approval Checklist
- Check your zoning and R Codes: Confirm whether your project qualifies for planning approval exemptions.
- Prepare detailed plans: Work with professional designers or Perth patio builders for accurate drawings.
- Choose permit type: Certified (BA1) for faster processing or uncertified (BA2) through the council.
- Submit application: Include all required documentation and pay fees.
- Receive permit: Wait for approval before starting construction.
- Build with confidence: Hire qualified trades to ensure compliance.
Why Work with Phoenix Patios
Phoenix Patios takes the stress out of council approvals. We:
- Review your design against R Codes and council rules
- Prepare compliant plans for patios, carports, and granny flats
- Lodge building permit applications on your behalf
- Deliver professional installation with a clean handover
Whether you are planning a Perth patio design or a brand new granny flat, we make sure everything is done right from the start.
Get Expert Help with Building Permits
Do not risk costly delays or non-compliance. Phoenix Patios can guide you through every step of the permit process and council approval for a patio in Perth and provide a free site assessment before you commit to your project.
Frequently Asked Questions
Yes, most patios require council approval for a patio in Perth and must meet setback and height rules. Some may also need planning approval if they exceed the deemed-to-comply requirements.
If your granny flat is 70 m² or smaller and meets R Code standards, you may not need planning approval, but you will still need a building permit.
Costs vary by council but generally range from $500 for patios to over $2,500 for granny flats with additional requirements.