BEACHES HOME + PROPERTY
DA or CDC? The Battle of the Build
Published: Autumn 2025, in Beaches Home + Property
When embarking on a home renovation or new build, one of the first decisions homeowners face is whether to pursue a Complying Development Certificate (CDC) or a Development Application (DA). While both have their advantages, James Pilcher from MILEHAM Architects and Builders in Freshwater emphasises that the best approach starts with design, not just the approval pathway.
If you’re beginning a building project, there’s a good chance you’re learning all about Complying Development Certificates (CDC) and Development Applications (DA). Both come with their own set of pros and cons, from flexibility and design freedom to speed and certainty.
"There’s definitely pros and cons to both. When we start a design, we work out what’s best for the project. Then we say, based on this design, this is a DA, and if we make the following sacrifices, we can get it approved as a CDC,” explains James, Principal Architect and Licensed Builder at MILEHAM.
With increasing reports of DA approval delays through local councils, many homeowners are opting for the faster, more cost-effective CDC route.
“At MILEHAM, we’re seeing this more because people don’t have to involve their neighbours, and the process is much quicker. But it’s important to understand the limitations, particularly when it comes to design and flexibility.”
While a CDC can be approved in just a few weeks, they do come with strict guidelines. There’s little room for adjustments, and designs must adhere fully to the pre-set code. James also reminds clients that planning ahead is key.
"There’s no point rushing through a CDC if you don’t have a builder lined up as it’s only one part of the process."
A DA allows for greater design freedom, but the approval process is longer, usually around three months. It’s crucial to weigh up factors like zoning regulations, site conditions and your long-term goals before making a decision. James also notes that council efficiency does vary.
"Some councils are terrible with the process, and others are really good. If you’re dealing with a good council, a DA is a great option," he says.
Choosing the best approval path for your project
Deciding between a DA and a CDC depends on your project’s complexity and priorities. If you’re after a straightforward design, a CDC is often the quickest route. And if your vision requires more flexibility and customisation, a DA allows for a tailored design approach.
“At MILEHAM, we have extensive experience navigating both DA and CDC applications,” says James. “We guide our clients through the process, offering expert advice tailored to each project. Our strong track record of securing first-time planning approvals ensures homeowners choose the right path, setting their build up for success from the start.”
“At the end of the day, what you’re going to live with is the design,” says James. “It’s important to get that right. If your home does need a DA submission, what’s another two or three months, five years from now?”
Ultimately, the best option depends on your site, council regulations and the level of design freedom you need.
Here’s a breakdown to help you decide…
Development Application (DA)
• Submitted through your local council. Approval typically takes around three months.
• Flexibility to design something unique.
• The documentation and assessment process can be more complicated, and there may be delays if additional information is needed.
Pro Tip: To avoid delays, consider discussing plans with your neighbours before submitting your DA. Addressing concerns early can help prevent time-consuming disputes down the line.
Complying Development Certificate (CDC)
• A private certifier assesses your design against a statewide ‘Code’. Approval usually takes two to three weeks.
• The process is more streamlined, but there’s a catch. If your design doesn’t meet the strict requirements, you may have to adjust your vision.
• Consider the design of your home, the land you're developing and your desired timeline.
Pro Tip: More suitable for straightforward designs but less so for complex or highly-customised projects.
If you’re unsure which route is right for your project, talking to a local Registered Architect is your best first step. Located in Freshwater, MILEHAM is available to talk through your design vision and ensure the right approval pathway is adopted for your home renovation or knock-down rebuild.
Read more: DA vs. CDC - What’s the best pathway for your new home build or home renovation?
