Duplex Chifley — Feasibility, Design, Approval & Build
End-to-end duplex delivery in Chifley 2036: yield analysis, design for R2 Low zoning, Randwick City Council approvals, subdivision coordination, construction, separate services and handover.
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A duplex in Chifley costs $750,000–$1,500,000+ for dual occupancy construction. Attached duplex from $750K, detached from $1M. Buildana manages feasibility, Randwick City Council approvals, construction and subdivision under one fixed-price contract.
Building Duplexes in Chifley
A duplex in Chifley is a dual-occupancy question best answered by a feasibility check, because Randwick's attached-dwelling controls turn on frontage and lot area, not a single simple minimum. The post-war fibro and brick on 500 to 700m² blocks in this quiet inland pocket can suit a dual-occupancy where the frontage and area work, and at a $1.8M to $2.8M median in the Randwick LGA, two dwellings deliver strong eastern-suburbs value.
The ground is sandstone-dominant, so excavation is a test-dig matter and the duplex slab and footings off geotech stay predictable. Where the older homes carry fibro, a licensed asbestos strip-out comes first, and the coastal proximity means durable material selection. We confirm the dual-occupancy controls against your specific block before design.
What I would check first on your Chifley block: whether the frontage and area suit a dual-occupancy, the sandstone under the footprint, and any asbestos before demolition. Those decide the play.
We build these fixed-price, licence HBL 487805C. Get our dual-occupancy feasibility before you commit.
Buildana manages the full duplex development process in Chifley — 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 Chifley from $750K
- Randwick City Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 600m² in Chifley
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Light Rail Kingsford (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
A feasibility question
Randwick's attached-dwelling controls turn on frontage and lot area, not a single simple minimum, so a dual-occupancy in Chifley starts with a feasibility check.
The post-war fibro and brick on 500 to 700m² blocks can suit two dwellings where the frontage and area work, at a $1.8M to $2.8M median with strong eastern-suburbs value.
Rock and asbestos
The sandstone-dominant ground means excavation is a test-dig matter, and the duplex slab and footings off geotech stay predictable.
Older fibro gets a licensed asbestos strip-out first, and the coastal proximity means durable material selection.
Duplex builder in Chifley — key facts
- Suburb
- Chifley, NSW 2036
- Council / LGA
- Randwick City Council (Randwick)
- Primary zoning
- R2 Low
- Typical lot size
- 500–700m²
- Soil class
- M
- Median house price
- $1.8M–$2.8M
- Home era
- 1950s–1970s
- 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 (side-by-side) | $710,000 – $1,050,000 |
| Attached duplex (stepped/offset) | $860,000 – $1,190,000 |
| Detached duplex (two fully separate dwellings) | $1,140,000 – $1,520,000 |
| Luxury detached duplex | $1,520,000+ |
| Party-wall acoustic & fire upgrade | Included |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
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 Randwick City 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 Chifley block — attached or detached configuration, vehicle access, private open space, and full Randwick City Council compliance.
⏱Full approval management: Statement of Environmental Effects, plans, reports, and all supporting documentation lodged with Randwick City 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
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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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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.
Chifley Dual Occupancy — Free Feasibility
Free duplex feasibility assessment for Chifley 2036. We'll check your block, estimate yield, and provide a fixed-price budget.
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Other Buildana services in Chifley
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Chifley 2036. Randwick City Council regulations and local controls are covered on each page.