Can I build a granny flat in The Hills Shire?
Instant SEPP Housing 2021 eligibility check for any The Hills Shire address — lot area, zoning, heritage exclusions (223 items in The Hills Shire), biodiversity values, and acid sulfate soils. Free. Also check solar yield and shadow impact for any The Hills Shire address.
Min. lot area
450 m²
SEPP Housing 2021
Heritage items
223
in The Hills Shire
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 The Hills Shire — common questions
Can I build a granny flat in The Hills Shire?
The Hills Shire is well-suited to granny flats. Large residential lots across Castle Hill, Baulkham Hills, and Kellyville frequently exceed 450 m², and heritage exclusions are relatively uncommon. Check your address above to confirm all criteria.
What lot size is needed for a granny flat in The Hills Shire?
The minimum under SEPP Housing 2021 is 450 m². The Hills Shire has some of Greater Sydney's larger residential lots — 700 m²+ is common in established suburbs. Newer townhouse estates with compact lots may be below the threshold.
Are heritage exclusions common in The Hills?
The Hills Shire has 223 heritage items, mainly concentrated in historic village centres like Rouse Hill and Old Northern Road corridor. Most residential suburbs are not heritage-affected.
What are the DCP setback requirements in The Hills Shire?
The Hills Shire DCP sets rear setback requirements for secondary dwellings. These are separate from SEPP eligibility — a property can pass the SEPP check but still have design constraints from DCP setbacks, height limits, and landscaping requirements.
Do I need council approval for a granny flat in The Hills Shire?
If all SEPP checks pass, a CDC through a private certifier is sufficient. The Hills Shire Council involvement is only required if a criterion fails.
Check other property risks in The Hills Shire
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.