Can I build a granny flat in Northern Beaches?
Instant SEPP Housing 2021 eligibility check for any Northern Beaches address — lot area, zoning, heritage exclusions (956 items in Northern Beaches), biodiversity values, and acid sulfate soils. Free.
Min. lot area
450 m²
SEPP Housing 2021
Heritage items
956
in Northern Beaches
Flood data
EPI overlay
checked per address
What we check
Lot area
Tested per approval path (CDC frontage band, DA site area)
Zoning
R1, R2, R3, R4, R5/RU5 under SEPP Housing 2021 cl 49
Heritage exclusion
Heritage items and conservation areas
Flood control lots
Statutory flood overlay check
Biodiversity
Biodiversity values map exclusions
Acid sulfate soils
Class 1 & 2 soil exclusions
Dual occupancy prohibition
LEP prohibition map check
Granny flats in Northern Beaches — common questions
Can I build a granny flat on the Northern Beaches?
It depends on the property. Under SEPP Housing 2021 a secondary dwelling needs a zone that permits it, a lot that meets the minimum size, and none of the SEPP land exclusions (such as heritage, flood, biodiversity values and some acid sulfate soil classes). The checker above tests each one for your address.
Why might my Northern Beaches property be ineligible?
A secondary dwelling can be ineligible under SEPP Housing 2021 because of the zone, the lot size, a heritage item or conservation area (including those in Manly, Avalon, and Palm Beach), the Biodiversity Values Map (coastal heathland and bushland), or some acid sulfate soil classes. The checker above shows which applies to your address.
Does heritage affect granny flat approvals on the Northern Beaches?
Yes. Heritage items and properties in heritage conservation areas are excluded from complying development. Conservation areas exist in Manly, Avalon, and Palm Beach. The checker above shows whether your address is affected.
What lot size is needed for a granny flat on the Northern Beaches?
SEPP Housing 2021 sets a minimum lot size for a secondary dwelling. The checker above reads the minimum from the SEPP and compares it with the lot area for your address.
Do biodiversity exclusions affect granny flat eligibility on the Northern Beaches?
Yes. Coastal heathland and bushland areas on the Northern Beaches are mapped on the Biodiversity Values Map. Properties within this map are excluded from SEPP Housing 2021 complying development for secondary dwellings.
Also check nearby councils
Checks lot area, zoning, heritage items and conservation areas, flood control lots, biodiversity values, and acid sulfate soils against SEPP Housing 2021. Flood check uses NSW EPI statutory overlay — shown as unknown outside coverage. DCP setback and height controls not included. Not legal advice.