Yes, many properties in Riverstone can accommodate a granny flat, but lot size and site constraints vary considerably across the suburb. Under the NSW Housing SEPP, a secondary dwelling may qualify for Complying Development on a lot of at least 450m², subject to the required development standards, with a maximum floor area of 60m². Riverstone has many established residential blocks around or above this threshold, while newer estates commonly include 300–450m² lots, so some properties may require a different approval pathway. Much of the residential area is zoned R2 Low Density Residential, but each site should also be checked for setbacks, easements and flood constraints associated with the Eastern Creek catchment before design work begins.
Get inspiration from our recent granny flat projects across Riverstone and surrounds — and see how we’ve turned different properties into practical new spaces.
Riverstone’s combination of established homes, rapid population growth and expanding local employment creates a strong case for adding a granny flat. The wider Riverstone precinct is planned to accommodate up to 9,000 new homes, while the nearby Riverstone West employment area has capacity for up to 12,000 jobs. The suburb is also changing around its town centre, where current planning provides for thousands of additional homes and new employment close to shops and public transport. For homeowners, this means a granny flat can provide valuable space for adult children, ageing parents or extended family, while also creating the option of rental income in a growing North West Sydney community.
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The three things that shape a granny flat build in Riverstone: the planning rules, the ground you’re building on, and what the market gives back.
Median house price in Riverstone
Typical granny flat rent
Key local landmark
your block
nearest station
A granny flat in Riverstone 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 Riverstone is under 450m2, sits in a heritage conservation area, or is affected by a flood planning control, a development application can be lodged with Blacktown City Council. Assessment times are longer than a CDC, but the council does approve secondary dwellings through this route.
Riverstone is administered by Blacktown City Council and assessed under the Blacktown LEP 2015. 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.
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The things Riverstone 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 Riverstone blocks support 60m² 2-bedroom layouts.
Yes, but we handle the entire approval process for you.
