CDC under state policy
Design & approvals
The design brief for a granny flat is discipline itself: a complete, comfortable dwelling within a compact envelope, commonly limited to about sixty square metres of living area under the state secondary dwelling provisions. Designs that respect the codified standards can be approved as complying development through a registered certifier; proposals outside them fall back to a council development application.
Scope
What this covers
Floor plans that make one or two bedrooms, living, kitchen and bathroom work without wasted circulation
Siting studies balancing setbacks, privacy, solar access and the main house's remaining yard
Complying development certificate documentation where the proposal meets the standards
Development application documentation for lots or designs outside the codified route
BASIX, stormwater and landscape requirements resolved within the compact footprint
Timing
When it's needed
Design starts once feasibility clears the lot. Owners building for rent tend to prioritise two bedrooms and durable finishes; family-housing projects lean toward accessibility features and connection to the main house. The intended occupant should shape the plan from the first sketch.
A backyard build puts a working site inside a family property: keep children and pets away from trenches, stacked materials and the work zone even outside work hours, and never use ladders or scaffolds left on site. Flag any open excavation or unsecured fencing to the site contact the moment you see it.
Quote variables
What shapes the scope
Whether the proposal fits the complying development standards or needs council assessment
One or two bedrooms and the wet-area count
Privacy screening and window orientation toward neighbours and the main house
Accessibility provisions where ageing family members are the intended occupants
Granny flat construction is residential building work under NSW law and must be carried out by a builder holding a current NSW Fair Trading contractor licence, under a written contract, with home building compensation cover in place for work above the insurance threshold before a deposit is taken. Licence details can be checked in minutes on the public online register: do that for any builder you deal with, whatever website introduced them.
Granny flat services
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