Duplex Builder Kellyville Ridge — From $750K Fixed Price
Fixed-price duplex construction in Kellyville Ridge 2155. Two dwellings, one contract, no variations. Minimum lot 600m² (R2) / 700m² preferred under Hills DCP. Free feasibility.
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MBA NSW0476 300 300Quick Answer
A duplex in Kellyville Ridge costs $750,000–$1,500,000+ for dual occupancy construction. Attached duplex from $750K, detached from $1M. Buildana manages feasibility, The Hills Shire Council approvals, construction and subdivision under one fixed-price contract.
Kellyville Ridge Duplex Construction
A duplex in Kellyville Ridge is feasible on the larger lots that clear the Hills 600m2 minimum, though many estate blocks fall short. This 2000s to 2010s master-planned suburb runs contemporary brick and rendered homes on 400 to 700m2 R2 lots, so the larger lots clear 600 while the smaller estate blocks do not. At a $1.4M to $1.9M market a Torrens-title duplex on a qualifying lot is a sound play in a strong young-family suburb, but the area is the first check.
The ground is Wianamatta Shale, so footings are engineered off geotech and the slab detailed to suit on both dwellings. On a qualifying block a side-by-side works cleanly, and being 2000s to 2010s stock there is usually no asbestos to strip. Estate design controls may apply, so I check those too.
What I would check first on your Kellyville Ridge block: whether it clears the 600m2 minimum, any estate design controls, 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 Kellyville Ridge — 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 Ridge 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 Ridge
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Bus to Kellyville Metro (2 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 master-planned suburb runs 2000s to 2010s brick and rendered homes on 400 to 700m2 R2 lots, so the larger lots clear the Hills 600m2 minimum.
At a $1.4M to $1.9M market a Torrens-title duplex on a qualifying lot is a sound play, with many estate blocks falling short.
Engineered for the shale
The Wianamatta Shale means footings engineered off geotech and the slab detailed to suit on both dwellings.
Estate design controls may apply, and being newer stock there is usually no asbestos to strip.
Duplex builder in Kellyville Ridge — key facts
- Suburb
- Kellyville Ridge, NSW 2155
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 400–700m²
- Soil class
- M
- Median house price
- $1.4M–$1.9M
- Home era
- 2000s–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.
Cost Guide
| Item | Estimated Range |
|---|---|
| Attached duplex (2 × 180–220m²) | $740,000 – $980,000 |
| Attached duplex (2 × 220–260m²) | $980,000 – $1,270,000 |
| Detached duplex (2 × 220–280m²) | $1,180,000 – $1,520,000 |
| Strata/Torrens subdivision | $15,000 – $29,000 |
| Demolition (if KDR duplex) | $18,000 – $39,000 |
| Council contributions | $10,000 – $59,000+ |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. Quick desktop check first — lot size, zoning, frontage — then full site visit if it stacks. Drainage path, neighbour overlooking, slope, services, easements. 600m² (R2) / 700m² preferred under Hills DCP minimum is just the entry ticket; the real feasibility is whether two compliant dwellings actually fit and sell. Our architect designs both dwellings to maximise your Kellyville Ridge block's yield — floor plans, elevations, 3D renders, and landscape concept. We optimise for rental return and sale value under The Hills Shire Council's DCP.
⏱The Kellyville Ridge construction phase. Fixed price, programmed, supervised. Most Kellyville Ridge duplexes go DA route through The Hills Shire Council — CDC pathways for dual occupancy are restrictive on most R2 blocks. We pre-meet with council planners on borderline sites to confirm support before lodgement, which avoids a 3-month round trip on RFIs. Both dwellings built simultaneously — engineered slabs (Class M soil), frame, lock-up, fit-out. Milestone updates from your project manager.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Final inspections, dual OCs issued, subdivision registered with LRS. Each dwelling gets its own title, services, and 6-year structural warranty. Ready to rent, sell, or occupy.
⏱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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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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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Kellyville Ridge 2155. The Hills Shire Council regulations and local controls are covered on each page.