Duplex Builder Sans Souci — CDC-Ready Designs, 15-Day Approval
Sans Souci 2219 duplex specialists. Compliant design means CDC approval in ~15 business days, construction complete in 10–14 months. Feasibility within 48 hours.
HIA Member
MBA NSW0476 300 300Sans Souci Duplex Construction
A duplex in Sans Souci works on the larger blocks, though the waterfront premium shapes the decision. This peninsula between the Georges River and Botany Bay runs 500 to 900m2 blocks against the 600m2 Bayside duplex minimum, so most clear it. On a $2.0M to $4.0M market, rising to $6M-plus on the waterfront, an inland block suits a duplex while a waterfront block usually makes more as a single home.
The ground is a Botany Sands and Wianamatta Shale interface, so footings and the slab are engineered to suit, and coastal salt-grade specifications apply near the water. R3 along Rocky Point Road adds a medium-density option, and the inter-war and post-war stock carries asbestos, stripped under licence.
What I would check first on your Sans Souci block: the area against 600m2, the distance to the water, and the salt-grade specs, because those decide between a duplex and a single home.
We build these fixed-price, licence HBL 487805C. Send me the block and I will tell you honestly what makes the most of it.
Buildana manages the full duplex development process in Sans Souci — 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 Sans Souci from $750K
- Bayside Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 600m² (Bayside DCP — R2 dual occupancy) in Sans Souci
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Bus to Kogarah (T4, 5 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Peninsula premium shapes the call
Sans Souci blocks run 500 to 900m2 against the 600m2 minimum, so most clear it.
An inland block suits a duplex; a Georges River or Botany Bay waterfront block usually makes more as a single home.
Sand-shale ground and salt specs
The Botany Sands and Wianamatta Shale interface means footings and slab engineered to suit the site.
Coastal salt-grade specifications apply near the water, setting the materials on any waterfront build.
Duplex builder in Sans Souci — key facts
- Suburb
- Sans Souci, NSW 2219
- Council / LGA
- Bayside Council (Bayside)
- Primary zoning
- R2 Low
- Typical lot size
- 500–900m²
- Soil class
- M
- Median house price
- $2.0M–$4.0M (waterfront $3M–$6M+)
- Home era
- 1930s–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.
Quality Promise
Buildana delivers Sans Souci duplexes as a single project — one contractor accountable from site check to subdivision.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. Site visit, title search, and planning assessment for your Sans Souci block. We check lot dimensions against Bayside Council's minimum (600m² (Bayside DCP — R2 dual occupancy)), review overlays, drainage, access, and services. You get a clear yes/no on duplex feasibility plus estimated yield. Design has to satisfy four audiences at once: Bayside Council, the future buyer or tenant, the certifier, and you. Each pull in a different direction — our job is to land plans that work for all four. Solar access, privacy, parking, POS, FSR, all balanced.
⏱The Sans Souci construction phase. Fixed price, programmed, supervised. We lodge and chase your approval — DA through Bayside Council for most duplexes, or CDC where eligible. R2 Low zoning in Sans Souci. CC issued, conditions cleared, ready to build. Building both sides in parallel halves the loan interest holding cost vs sequential builds. Bulk material orders for cabinetry, tiles, fixtures cut unit cost. Single site setup, single supervisor, single insurance period — efficiency compounds across the whole programme.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Strata or Torrens title subdivision completed. Separate OCs, individual metering, 6-year structural warranty per dwelling. Strong rental demand near Bus to Kogarah (T4, 5 km).
⏱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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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 Sans Souci 2219. Bayside Council regulations and local controls are covered on each page.