Can I build a granny flat in Inner West?
Instant SEPP Housing 2021 eligibility check for any Inner West address — lot area, zoning, heritage exclusions (2,039 items in Inner West), biodiversity values, and acid sulfate soils. Free. Also check solar yield and shadow impact for any Inner West address.
Min. lot area
450 m²
SEPP Housing 2021
Heritage items
2,039
in Inner West
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 Inner West — common questions
Can I build a granny flat in the Inner West?
Yes, if your property meets the SEPP Housing 2021 criteria. The Inner West has many R2 and R3 zoned properties over 450 m² that qualify. However, with 2,039 heritage items, heritage exclusions are a common reason for ineligibility. Check your address above.
Why might my Inner West property be ineligible for a granny flat?
The most common exclusions in the Inner West are: heritage listing (heritage item or conservation area), lot under 450 m², or a zone that doesn't permit secondary dwellings. Flood exclusions are less common but possible near creek lines in Marrickville and Leichhardt.
Does heritage listing affect granny flat eligibility in the Inner West?
Yes. The Inner West has 2,039 heritage items — the highest count of any LGA in our coverage. Properties that are heritage items or within heritage conservation areas are excluded from SEPP Housing 2021 complying development. A DA is required instead.
What lot size is needed for a granny flat in the Inner West?
The minimum under SEPP Housing 2021 is 450 m². Many Inner West terrace houses sit on lots of 200–350 m² and are ineligible on lot size alone. Semi-detached homes and detached houses on larger blocks are more likely to qualify.
How large can a granny flat be in the Inner West?
Secondary dwellings under SEPP Housing 2021 are capped at 60 m² internal floor area. Inner West Council's DCP also imposes setback requirements — rear setbacks, side setbacks, and height limits all apply and must be checked before designing.
Check other property risks in Inner West
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.