Dual Occupancy Specialists Engadine — Licensed Duplex Builder
NSW licensed duplex builder in Engadine 2233. Torrens or strata subdivision, Sutherland Shire Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Dual Occupancy Developments in Engadine
A duplex in Engadine works on the larger lots that clear the Sutherland 700m2 minimum, with bushfire and rock to plan for. This bushland-fringe suburb backing Royal National Park runs 1960s to 1990s fibro and brick veneer on 550 to 800m2 R2 blocks, so the larger lots clear 700 while smaller ones fall short. BAL-19 to BAL-29 is typical, with BAL-40 or Flame Zone on the eastern bushland edge, so an RFS Bushfire Protection Assessment is mandatory on most rebuilds.
The ground is Hawkesbury Sandstone with rock-cutting, so a duplex spreads that across two footprints, and both dwellings would carry BAL-rated substructure detailing where the rating applies. On a qualifying lot off the worst bushfire ratings a side-by-side works cleanly. Where the existing home carries fibro a licensed asbestos strip-out comes first.
What I would check first on your Engadine block: whether it clears the 700m2 Sutherland minimum, the BAL rating, and the rock. 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 Engadine — 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 Engadine from $750K
- Sutherland Shire Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 700m² under Sutherland Shire DCP 2015 (higher than most LGAs) in Engadine
- Hawkesbury Sandstone bedrock — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Engadine station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Feasibility against 700m2
This bushland-fringe suburb runs 1960s to 1990s stock on 550 to 800m2 R2 blocks, so the larger lots clear the Sutherland 700m2 minimum.
BAL-19 to BAL-29 is typical, with BAL-40 or Flame Zone on the eastern bushland edge, so a bushfire assessment is mandatory.
Rock and BAL detailing
The Hawkesbury Sandstone means rock-cutting spread across both dwellings on a duplex.
Both dwellings carry BAL-rated substructure detailing where the rating applies, with older fibro stripped under licence.
Duplex builder in Engadine — key facts
- Suburb
- Engadine, NSW 2233
- Council / LGA
- Sutherland Shire Council (Sutherland Shire)
- Primary zoning
- R2 Low Density predominant
- Typical lot size
- 550–800m² typical; 600–1,000m² premium beachside/foreshore (Cronulla/Burraneer/Lilli Pilli/Yowie Bay/Caringbah South/Sylvania Waters); 700–2,000m² bushland-fringe (Bundeena, Maianbar, Bangor, Menai)
- Soil class
- Hawkesbury Sandstone bedrock
- Median house price
- $1.4M–$2.2M mid-tier; $1.8M–$3.8M foreshore; $2.5M–$6.0M+ Cronulla/Burraneer/Lilli Pilli/Caringbah South premium beachside
- Home era
- 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick
- 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
Every Buildana duplex in Engadine is built under a fixed-price contract — feasibility through to dual handover and subdivision.
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 Engadine block against Sutherland 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 Density predominant 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
Use our free calculator to get an instant cost estimate for your project
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
We Build Across Sydney
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.
Duplex in Engadine — Book Site Assessment
Free duplex feasibility assessment for Engadine 2233. We'll check your block, estimate yield, and provide a fixed-price budget.
Start Your ProjectMore in Engadine
Other Buildana services in Engadine
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Engadine 2233. Sutherland Shire Council regulations and local controls are covered on each page.