Dual Occupancy Specialists Riverstone — Licensed Duplex Builder
NSW licensed duplex builder in Riverstone 2765. Torrens or strata subdivision, Blacktown City Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Building Duplexes in Riverstone
A duplex in Riverstone is a block-by-block call, because the suburb runs from a heritage town centre out into new-release growth areas. Lots run 300 to 600m2 of R2, so many sit under the Blacktown 600m2 minimum, with the larger established and older-town blocks the ones that can qualify. On a $800K to $1.05M market with a station in the suburb, a qualifying block carries a Torrens-title duplex well.
Where a block clears the minimum, the ground is moderately to highly reactive clay, so footings and the slab are engineered to suit across both dwellings. Older town-centre stock may carry asbestos while new-release homes are clean, so I confirm the era before demolition. A side-by-side works once the frontage checks out.
What I would check first on your Riverstone block: the area against 600m2, then whether it sits in the older town or a release area, because those behave differently.
We build these fixed-price, licence HBL 487805C. Send me the block and I will tell you what it carries.
Buildana manages the full duplex development process in Riverstone — from feasibility assessment and architectural design through to DA or CDC approval, and fixed-price construction to dual handover. One builder, one contract, two homes.
Read our Complete Duplex Building Guide or explore duplex developments across Sydney.
- Dual occupancy in Riverstone from $750K
- Blacktown City Council DA and CDC approvals managed
- R2 zoning — eligible under July 2024 reform
- Minimum lot size 600m² in Riverstone
- Class M–H soil — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Riverstone station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Town centre or release area
Riverstone lots run 300 to 600m2, so many sit under the Blacktown 600m2 minimum.
The larger established and older-town blocks are the ones that can clear it, with a station in the suburb supporting demand.
Reactive clay, era-dependent demolition
Where a block qualifies, the moderately to highly reactive clay means engineered footings and slab on both dwellings.
Older town-centre stock may carry asbestos while release homes are clean, which I confirm before demolition.
Duplex builder in Riverstone — key facts
- Suburb
- Riverstone, NSW 2765
- Council / LGA
- Blacktown City Council (Blacktown City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 300–600m²
- Soil class
- Class M–H
- Median house price
- $800K–$1.05M
- Home era
- Mixed
- Typical price range
- $750,000 – $1,500,000+
- Typical timeline
- 14–22 months design to handover
- Approval pathway
- CDC for compliant dual-occupancy, else DA
Want a real number for YOUR block — not a generic estimate?
Free site assessment, fixed-price contract, line-itemised quote within 48 hours. No high-pressure sales — just a real builder talking real numbers.
Quality Promise
Our Riverstone duplex projects run from feasibility to subdivision under one builder. Fixed price, dual handover, full compliance.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. Feasibility covers the planning side and the financial side. Yes-or-no on whether the block supports dual occupancy under Blacktown City Council controls, plus indicative end values, build cost, and likely yield. The point is to kill bad sites before you spend on design — not after. Dual occupancy floor plans designed for your Riverstone block — attached or detached configuration, vehicle access, private open space, and full Blacktown City Council compliance.
⏱The Riverstone construction phase. Fixed price, programmed, supervised. Full approval management: Statement of Environmental Effects, plans, reports, and all supporting documentation lodged with Blacktown City Council or private certifier. We handle RFIs and conditions. CC follows. Construction follows a tight programme: dual slabs in one mobilisation, paired frame stand, simultaneous lock-up, then trades rotate between sides for fit-out so no day is lost waiting on availability. The schedule is engineered, not optimistic.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Both dwellings handed over with individual Occupation Certificates. Subdivision lodged for separate titles. Separate metering installed. 6-year structural warranty per dwelling.
⏱Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
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Still got questions? Talk to Oliver directly.
30-min free call — bring your block, your brief, your budget. We'll map out feasibility, timeline, and realistic cost. No sales pitch.
Frequently Asked Questions
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Fatima Al-Rashid
Liverpool, NSW
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Last updated: 1 July 2025
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