Dual Occupancy Specialists Baulkham Hills — Licensed Duplex Builder
NSW licensed duplex builder in Baulkham Hills 2153. Torrens or strata subdivision, The Hills Shire Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Building Duplexes in Baulkham Hills
A duplex in Baulkham Hills sits in one of the Hills' strongest dual-occupancy markets. The 1970s to 1990s brick homes sit on 600 to 900m² R2 lots, so most clear the Hills DCP minimum of 600m², with 700m² preferred, and a Torrens-title duplex on a $1.6M to $2.4M street delivers two quality dwellings in an established, school-rich pocket. The generous blocks give real design freedom for a duplex that does not feel cramped.
The Wianamatta Shale ground keeps the duplex slab and footings off geotech predictable, and R3 redevelopment around Old Northern Road can open a townhouse yield on the right block worth checking against a duplex. Where older homes carry fibro, a licensed asbestos strip-out comes first, and a compliant duplex moves through the Hills Shire on a known path.
What I would check first on your Baulkham Hills block: whether it clears 600 to 700m², any R3 upside near Old Northern Road, and the slab off geotech. Those set the play.
We build these fixed-price, licence HBL 487805C. Get our site-yield feasibility before you commit.
Buildana manages the full duplex development process in Baulkham Hills — 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 Baulkham Hills from $750K
- The Hills Shire Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 600m² (R2) / 700m² preferred under Hills DCP in Baulkham Hills
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Bus to Castle Hill Metro (3 km) / T-Way station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
A strong Hills duplex market
The 1970s to 1990s brick homes sit on 600 to 900m² R2 lots, so most clear the Hills DCP minimum of 600m², with 700m² preferred.
A Torrens-title duplex on a $1.6M to $2.4M street delivers two quality dwellings in an established, school-rich pocket, with real design freedom on the generous blocks.
Predictable ground, townhouse upside
The Wianamatta Shale keeps the duplex slab and footings off geotech predictable, and R3 redevelopment around Old Northern Road can open a townhouse yield worth checking.
Older fibro gets a licensed asbestos strip-out first, and a compliant duplex moves through the Hills Shire on a known path.
Duplex builder in Baulkham Hills — key facts
- Suburb
- Baulkham Hills, NSW 2153
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 600–900m²
- Soil class
- M
- Median house price
- $1.6M–$2.4M
- Home era
- 1970s–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.
Quality Promise
Every Buildana duplex in Baulkham Hills is built under a fixed-price contract — feasibility through to dual handover and subdivision.
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 The Hills Shire 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 Baulkham Hills block — attached or detached configuration, vehicle access, private open space, and full The Hills Shire Council compliance.
⏱Full approval management: Statement of Environmental Effects, plans, reports, and all supporting documentation lodged with The Hills Shire 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.
⏱Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
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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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Headquartered in Western Sydney's Fairfield. Active across all 28 metropolitan Sydney LGAs — from Penrith to the Eastern Suburbs, the Hills to the Sutherland Shire.
Last updated: 1 July 2025
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Baulkham Hills Dual Occupancy — Free Feasibility
Free duplex feasibility assessment for Baulkham Hills 2153. 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 Baulkham Hills 2153. The Hills Shire Council regulations and local controls are covered on each page.