Dual Occupancy Specialists Hassall Grove — Licensed Duplex Builder
NSW licensed duplex builder in Hassall Grove 2761. Torrens or strata subdivision, Blacktown City Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Quick Answer
A duplex in Hassall Grove costs $750,000–$1,500,000+ for dual occupancy construction. Attached duplex from $750K, detached from $1M. Buildana manages feasibility, Blacktown City Council approvals, construction and subdivision under one fixed-price contract.
Hassall Grove Dual Occ. — Feasibility to Handover
A duplex in Hassall Grove is a feasible dual-occupancy on the lots that clear the Blacktown 600m2 minimum, though the 1990s stock sits on some tighter blocks. This quiet family suburb runs 1990s homes on standard blocks with good community amenities, and at an $800K to $1.0M median a Torrens-title duplex on a qualifying lot is an affordable play. Some 1990s lots fall short of 600, so the area is the first check.
This is Blacktown LGA on reactive clay, so footings are engineered off geotech and the slab is detailed for the movement on both dwellings. On a qualifying block a side-by-side duplex works cleanly, and there are no broad heritage overlays. Being 1990s stock, I confirm any asbestos before demolition.
What I would check first on your Hassall Grove block: whether it clears the 600m2 minimum, the reactive-clay footing design, and the frontage. Those set the dual-occ.
We build these fixed-price, licence HBL 487805C. Send me the block and I will tell you what dual-occupancy it carries.
Buildana manages the full duplex development process in Hassall Grove — 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 Hassall Grove from $750K
- Blacktown City Council DA and CDC approvals managed
- R2 zoning — eligible under July 2024 reform
- Minimum lot size 600m² in Hassall Grove
- 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 Mount Druitt (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Feasibility against 600m2
This quiet family suburb runs 1990s homes on standard blocks with good community amenities, so the larger lots clear the Blacktown 600m2 minimum.
At an $800K to $1.0M median a Torrens-title duplex on a qualifying lot is an affordable play, with some tighter lots falling short.
Engineered for the clay
This is Blacktown LGA on reactive clay, so footings are engineered off geotech and the slab detailed for movement on both dwellings.
No broad heritage overlays keep the path predictable, and I confirm any asbestos before demolition.
Duplex builder in Hassall Grove — key facts
- Suburb
- Hassall Grove, NSW 2761
- Council / LGA
- Blacktown City Council (Blacktown City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 550–700m²
- Soil class
- Class M–H
- Median house price
- $800K–$1.0M
- Home era
- 1990s
- 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.
How It Works
From First Call to Final Key
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 Hassall Grove block — attached or detached configuration, vehicle access, private open space, and full Blacktown City Council compliance.
⏱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.
⏱Both dwellings handed over with individual Occupation Certificates. Subdivision lodged for separate titles. Separate metering installed. 6-year structural warranty per dwelling.
⏱Quality Promise
Every Buildana duplex in Hassall Grove is built under a fixed-price contract — feasibility through to dual handover and subdivision.
Cost Guide
| Item | Estimated Range |
|---|---|
| Attached duplex (side-by-side) | $700,000 – $1,020,000 |
| Attached duplex (stepped/offset) | $840,000 – $1,160,000 |
| Detached duplex (two fully separate dwellings) | $1,120,000 – $1,490,000 |
| Luxury detached duplex | $1,490,000+ |
| Party-wall acoustic & fire upgrade | Included |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
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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Liverpool, NSW
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Last updated: 1 July 2025
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Duplex in Hassall Grove — Book Site Assessment
Free duplex feasibility assessment for Hassall Grove 2761. We'll check your block, estimate yield, and provide a fixed-price budget.
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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Hassall Grove 2761. Blacktown City Council regulations and local controls are covered on each page.