Dual Occupancy Specialists Dundas — Licensed Duplex Builder
NSW licensed duplex builder in Dundas 2117. Torrens or strata subdivision, City of Parramatta Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Quick Answer
A duplex in Dundas costs $750,000–$1,500,000+ for dual occupancy construction. Attached duplex from $750K, detached from $1M. Buildana manages feasibility, City of Parramatta Council approvals, construction and subdivision under one fixed-price contract.
Building Duplexes in Dundas
A duplex in Dundas works on the R2 lots that clear the Parramatta 600m2 minimum and sit off the heritage streets, with the light rail adding value. This established hill-fall suburb above the Parramatta River runs Federation cottages, inter-war heritage and post-war brick on 500 to 800m2 R2 lots, and at a $1.5M to $2.0M market a Torrens-title duplex on a qualifying lot is a sound play with Parramatta Light Rail Stage 2 on the alignment. Heritage Conservation Areas sit in pockets, so the status check comes first.
The ground is Wianamatta Shale with sandstone outcrops on the river-fall edge, so footings are engineered off geotech and the fall handled in the siting on both dwellings. On a qualifying non-heritage lot a side-by-side works cleanly, and some smaller lots fall short of 600. Where older homes carry fibro a licensed asbestos strip-out comes first.
What I would check first on your Dundas block: whether it clears the 600m2 minimum, the heritage status, and the sandstone outcrops on the river-fall edge. 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 Dundas — 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 Dundas from $750K
- City of Parramatta Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 600m² (R2) under Parramatta DCP 2023 in Dundas
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Dundas (Parramatta Light Rail, in suburb) 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 hill-fall suburb runs Federation, inter-war and post-war stock on 500 to 800m2 R2 lots, so the larger lots clear the Parramatta 600m2 minimum.
At a $1.5M to $2.0M market a Torrens-title duplex on a qualifying lot is a sound play with Parramatta Light Rail Stage 2 on the alignment.
River-fall and heritage
The Wianamatta Shale with sandstone outcrops on the river-fall edge means footings engineered off geotech with the fall handled in the siting.
Heritage sits in pockets, so the status check comes first, with older fibro stripped under licence.
Duplex builder in Dundas — key facts
- Suburb
- Dundas, NSW 2117
- Council / LGA
- City of Parramatta Council (City of Parramatta)
- Primary zoning
- R2 Low
- Typical lot size
- 500–800m²
- Soil class
- M
- Median house price
- $1.5M–$2.0M
- Home era
- 1900s–1960s
- 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
A duplex is really a feasibility problem wearing a construction outfit. Before anything else, we verify your Dundas block against City of Parramatta 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.
⏱Quality Promise
Buildana delivers Dundas duplexes as a single project — one contractor accountable from site check to subdivision.
Cost Guide
| Item | Estimated Range |
|---|---|
| Standard attached duplex — base spec | $750,000 – $950,000 |
| Upgraded finishes (stone, ducted A/C, upgraded kitchens) | $950,000 – $1,200,000 |
| Premium duplex (architect design, hydronic, landscape package) | $1,200,000 – $1,550,000 |
| Luxury detached dual occupancy | $1,550,000+ |
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
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Fatima Al-Rashid
Liverpool, NSW
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Last updated: 1 July 2025
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