Dual Occupancy Specialists North Kellyville — Licensed Duplex Builder
NSW licensed duplex builder in North Kellyville 2155. Torrens or strata subdivision, The Hills Shire Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Quick Answer
A duplex in North Kellyville 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.
North Kellyville Dual Occ. — Feasibility to Handover
A duplex in North Kellyville is feasible on the larger lots that clear the Hills 600m2 minimum, though many estate blocks fall short. This 2010s master-planned new-release suburb runs contemporary brick and rendered homes on 350 to 650m2 R2 lots adjacent to the Box Hill growth corridor, 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 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 North Kellyville 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 North 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 North 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 North Kellyville
- 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 (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 2010s master-planned suburb runs contemporary homes on 350 to 650m2 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 2010s stock there is usually no asbestos to strip.
Duplex builder in North Kellyville — key facts
- Suburb
- North Kellyville, NSW 2155
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 350–650m²
- Soil class
- M
- Median house price
- $1.4M–$1.9M
- Home era
- 2010s+ contemporary
- 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
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 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 North Kellyville block — attached or detached configuration, vehicle access, private open space, and full The Hills Shire Council compliance.
⏱The North Kellyville construction phase. Fixed price, programmed, supervised. 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.
⏱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.
⏱Quality Promise
Every Buildana duplex in North Kellyville is built under a fixed-price contract — feasibility through to dual handover and subdivision.
Cost Guide
| Item | Estimated Range |
|---|---|
| Attached duplex (2 × 180–220m²) | $770,000 – $1,020,000 |
| Attached duplex (2 × 220–260m²) | $1,020,000 – $1,330,000 |
| Detached duplex (2 × 220–280m²) | $1,220,000 – $1,580,000 |
| Strata/Torrens subdivision | $15,000 – $31,000 |
| Demolition (if KDR duplex) | $18,000 – $41,000 |
| Council contributions | $10,000 – $61,000+ |
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
Buildana built our granny flat in just 12 weeks. Fast approvals, great communication, and a beautiful final product. Highly recommend.
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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Other Buildana services in North Kellyville
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in North Kellyville 2155. The Hills Shire Council regulations and local controls are covered on each page.