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Extension design
A second storey, a rear extension or a new wing, designed to read as part of the house it joins.
An extension has two jobs: add the room you need, and leave the rest of the house better than it was. We look at structure, light, the garden you keep and what the street sees before deciding whether to go up, out or both.
In North Balgowlah a second storey was set back under a roof pitched to match the original, so it reads as if it was always intended. In Marrickville a single-storey cottage became a two-storey home behind its original gable. In Collaroy Plateau a brick cottage grew up, not out, and kept its garden.
The approval pathway is part of the design. Height limits, floor space ratio and setbacks decide how much can be added, and whether a CDC is possible. We confirm those for your address first.
Who leadsLaura Woodford, Nominated Architect, or Adam Feigl, Building Designer, matched to the project.
What this includes
- Second storey addition design
- Rear and side extension planning
- Structural integration assessment
- Natural light and ventilation design
- Streetscape and neighbour impact analysis
Projects like this
All projects
Questions people ask
All questionsWhat is the difference between a DA and a CDC?
A Development Application (DA) is assessed by your local council and suits more complex or sensitive projects. A Complying Development Certificate (CDC) is assessed by a private certifier against a checklist of standards and is typically faster. We will advise which pathway suits your project.
How long does the design process take?
Timelines vary depending on the project size and complexity. A straightforward renovation design might take 6 to 8 weeks, while a new build or complex extension could take 12 to 16 weeks. We will provide a detailed timeline in your proposal.
Can I make changes once the design is finalised?
Yes, changes can be made, though timing matters. Early-stage changes are straightforward, while changes during documentation or after approval may incur additional fees and time. We always advise on the implications before proceeding.
Thinking about extension design?
Every project starts with a conversation about your home. A free Property Report shows what the planning rules allow on your site.