Can I build a granny flat in Ku-ring-gai?
Instant SEPP Housing 2021 eligibility check for any Ku-ring-gai address — lot area, zoning, heritage exclusions (1,046 items in Ku-ring-gai), biodiversity values, and acid sulfate soils. Free. Also check solar yield and shadow impact for any Ku-ring-gai address.
Min. lot area
450 m²
SEPP Housing 2021
Heritage items
1,046
in Ku-ring-gai
Flood data
EPI overlay
checked per address
What we check
Lot area
Min. 450 m² under SEPP Housing 2021
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 Ku-ring-gai — common questions
Can I build a granny flat in Ku-ring-gai?
Ku-ring-gai is one of the harder LGAs for granny flat eligibility. With 1,046 heritage items and extensive heritage conservation areas across Gordon, Killara, Lindfield, and Wahroonga, heritage exclusions affect a large proportion of properties. Check your address above.
Why do so many Ku-ring-gai properties fail the heritage check?
Ku-ring-gai has the second-highest heritage item count in our coverage. Entire streets in established suburbs are within heritage conservation areas. Any property within a conservation area — not just individually listed items — is excluded from SEPP Housing 2021 complying development.
What lot size is needed for a granny flat in Ku-ring-gai?
The minimum is 450 m². Ku-ring-gai's large blocks (700 m²+ is common) easily clear the lot size threshold. The binding constraint for most properties is heritage, not lot size.
Can I still build a granny flat if my Ku-ring-gai property fails SEPP?
Yes, via a DA. A heritage impact assessment from a qualified consultant would be required. Some Ku-ring-gai properties can accommodate secondary dwellings through DA with appropriate design conditions. Council's heritage officer is the first point of contact.
Are biodiversity exclusions common in Ku-ring-gai?
Yes. Ku-ring-gai's extensive bush corridor — including Garigal National Park and local reserves — creates biodiversity value mapping across many residential properties near bushland edges.
Check other property risks in Ku-ring-gai
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.