Kellyville Duplex Builder — Western Sydney Dual Occupancy
Buildana is a local The Hills duplex builder. We know which Kellyville streets support Torrens title subdivision, which suit strata, and what The Hills Shire Council will approve. Free site feasibility.
HIA Member
MBA NSW0476 300 300Building Duplexes in Kellyville
A duplex in Kellyville is a strong dual-occupancy play now the Metro has landed. The 1990s to 2010s homes sit on 500 to 800m² blocks, so those clearing The Hills' 600m² dual-occupancy minimum suit a Torrens-title duplex, and 700m² and over sits in council's preferred range with more design freedom. Around the Metro station the R3 zoning opens a townhouse yield that beats a duplex on the right block.
The Wianamatta Shale ground is reactive Class M to H, so the two slabs get engineered off geotech rather than assumed, and stiffened rafts are common here. On the newer estate blocks there is no fibro to strip, which keeps the demolition phase clean where a rebuild is involved.
What I check first on your Kellyville block: whether it clears 600m² or sits above the 700m² preferred line, and whether the Metro-driven R3 zoning puts a townhouse yield in play instead. Those decide the best use of the land.
We build fixed-price, licence HBL 487805C. Get our site-yield feasibility before you commit.
Buildana manages the full duplex development process in Kellyville — 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 Kellyville 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 Kellyville
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Kellyville (Sydney Metro Northwest, in suburb) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Duplex or townhouses near the Metro
Kellyville changed when the Sydney Metro Northwest station opened in the suburb. Blocks near the station now carry R3 medium-density potential, and on a wide enough parcel a townhouse development can out-yield a straight duplex. On the streets further out, a Torrens-title duplex on a 700m² block is the cleaner play. I run both numbers so you pick on return, not on assumption.
The 600m² minimum is the floor, but The Hills prefers 700m² and gives you more room to move above it. A block sitting between those two is worth a careful feasibility rather than a rule of thumb.
Building on Kellyville shale
The reactive shale here means the slab design is engineering, not guesswork. A stiffened raft off a real geotech report keeps both dwellings stable and stops the reactive-clay movement that plagues under-designed slabs. On the newer estate blocks the ground is otherwise cooperative, so a well-engineered Kellyville duplex builds predictably.
Duplex builder in Kellyville — key facts
- Suburb
- Kellyville, NSW 2155
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 500–800m²
- Soil class
- M
- Median house price
- $1.8M–$2.6M
- Home era
- 1990s–2010s
- 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 Kellyville 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
A duplex is really a feasibility problem wearing a construction outfit. Before anything else, we verify your Kellyville block against The Hills Shire Council's LEP — lot size, frontage, FSR, landscape area. If it doesn't stack up, you find out in a week, not after 3 months of design.
⏱Design runs dual from day one. Two dwellings, one coherent streetscape, party-wall acoustics and fire rating built into the structure rather than bolted on. The plan accommodates R2 Low zoning without looking like two mismatched houses sharing a fence.
⏱Approval and construction get sequenced together. Slab pours are choreographed so the trades show up once, frame up both sides, and keep rolling. Two separate meters, two separate services, but one crew, one programme.
⏱Handover is dual. Both dwellings walked at the same time, both OCs in the same issue, both titles subdivided before settlement. You leave the final inspection with the option to live in one and rent the other, or to sell both.
⏱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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Free duplex feasibility assessment for Kellyville 2155. 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 Kellyville 2155. The Hills Shire Council regulations and local controls are covered on each page.