Yes, many McGraths Hill properties can support a granny flat, particularly established residential blocks that meet the required site standards. Under the NSW Housing SEPP, a secondary dwelling may qualify for CDC on a lot of at least 450m², subject to the applicable development controls. McGraths Hill includes R2 Low Density Residential areas, but each property needs to be assessed individually, particularly for Hawkesbury-Nepean flood risk, evacuation constraints, setbacks and available backyard space before the design and approval pathway is confirmed.
Get inspiration from our recent granny flat projects across McGraths Hill and surrounds — and see how we’ve turned different properties into practical new spaces.
McGraths Hill is a practical location for a granny flat because of its established detached housing and strong family presence. Around 92.2% of occupied homes are separate houses and 82.2% are family households, making additional self-contained accommodation useful for older parents, adult children or extended family. For homeowners considering an investment use, the current median house rent is around $805 per week, indicating the level of rents being achieved in the local market. On a suitable property, a granny flat can provide additional rental income, flexible family accommodation or a future downsizing option while making better use of existing backyard space.
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The three things that shape a granny flat build in McGraths Hill: the planning rules, the ground you’re building on, and what the market gives back.
Median house price in McGraths Hill
Typical granny flat rent
Key local landmark
your block
nearest station
A granny flat in McGraths Hill can be approved through a private certifier as complying development when the lot is 450m2 or larger, the secondary dwelling is no more than 60m2 (or 25% of the main house, whichever is less), and setbacks, height and landscaping meet Housing SEPP 2021 standards. This pathway typically takes 10 to 15 business days once documentation is complete. Blocks inside a flood planning area can still qualify, but floor levels and fill must meet the council's flood controls, which we check against the flood certificate before design.
Not meeting one complying development requirement does not rule a project out. Where a block in McGraths Hill is under 450m2, sits in a heritage conservation area, or is affected by a flood planning control, a development application can be lodged with Hawkesbury City Council. Assessment times are longer than a CDC, but the council does approve secondary dwellings through this route.
McGraths Hill is administered by Hawkesbury City Council and assessed under the Hawkesbury LEP 2012. The whole suburb falls within the one council area. Granny Flats X confirms the consent authority for your specific block during the initial property assessment.
Get a free site assessment and fixed-price estimate for your McGraths Hill project.
The things McGraths Hill homeowners ask us most. Can’t find yours? Call us — we’ll give you a straight answer.
Usually 12-14 weeks from approval. We fast-track the council paperwork.
Yes. Most McGraths Hill blocks support 60m² 2-bedroom layouts.
Yes, but we handle the entire approval process for you.
