Licensed Home Extension Builder Sylvania
NSW licensed extension specialist. Sylvania 2224 extensions on 1970s–1990s brick veneer-era homes require structural sign-off, Class Hawkesbury Sandstone bedrock footings, and matched connection — we engineer and document properly.
HIA Member
MBA NSW0476 300 300Sylvania Home Extensions & Additions
A home extension in Sylvania suits a settled residential corridor between Miranda and Sylvania Waters. The 1970s to 1990s brick veneer homes here sit on 550 to 750m² R2 blocks with real backyard depth, and at a $1.6M to $2.4M median, close to Westfield Miranda and the Princes Highway corridor, extending to stay beats trading up in a tightly held pocket.
Hawkesbury Sandstone bedrock is the line item to respect, with rock-cutting common on substructure, so we test the dig before pricing groundwork. The brick veneer era extends cleanly at ground level and needs steel to go up, so out is the sensible direction on these blocks, and the depth makes a rear family-room addition straightforward without crowding the yard.
What I would check first on your Sylvania house: where the sandstone starts under a rear addition, the frame type, and the rear yard depth. Those decide the method and the final number.
We build these fixed-price, licence HBL 487805C. Ask us for a feasibility read priced on a test dig.
Buildana manages the complete home extension process in Sylvania — from design consultation and structural engineering through to DA or CDC approval, and fixed-price construction to handover. Extend your home without the stress.
Read our Home Extension Cost Guide 2026 or explore extension approval pathways in NSW.
- Home extensions in Sylvania from $150K
- Sutherland Shire Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone bedrock — structural engineering included
- 1970s–1990s brick veneer-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Miranda (2 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
A settled corridor
The 1970s to 1990s brick veneer homes sit on 550 to 750m² R2 blocks with real backyard depth, close to Westfield Miranda and the Princes Highway corridor.
At a $1.6M to $2.4M median, extending to stay beats trading up in a tightly held pocket.
Respect the sandstone
Hawkesbury Sandstone bedrock means rock-cutting is common on substructure, so we test the dig before pricing groundwork.
The brick veneer era extends cleanly at ground level and needs steel to go up, so out is the sensible direction, and the depth makes a rear addition straightforward.
Home extension builder in Sylvania — key facts
- Suburb
- Sylvania, NSW 2224
- 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
- $1.6M–$2.4M
- Home era
- 1970s–1990s brick veneer
- Typical price range
- $150,000 – $600,000+
- Typical timeline
- 6–12 months design to handover
- Approval pathway
- CDC for most rear extensions, DA for second-storey
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 home extension in Sylvania is delivered under a fixed-price contract — from design consultation through to defect-free handover.
How It Works
From First Call to Final Key
Extension feasibility comes down to two things: what the existing structure can carry, and what Sutherland Shire Council will let you build. We assess both at the consultation — no point designing for a second storey if the slab can't take the load.
⏱Extension designed to integrate with your existing Sylvania home — matching roof lines, materials, and flow between old and new sections. Floor plans, elevations, and 3D renders.
⏱All approval documentation prepared: structural drawings, BASIX, shadow analysis, stormwater, and statement of environmental effects (if DA). Lodged and managed through to Construction Certificate.
⏱Extension construction takes 3–6 months on average. Footings excavated and poured to match existing depth on Class Hawkesbury Sandstone bedrock soil, frame stand, roof tie-in (most weather-critical phase), lock-up, then internal fit-out at the same standard as the existing house.
⏱Defect-free inspection, OC issued, 6-year warranty on all new work. Junction between old and new sections waterproofed and warranted. Maintenance guide covers care of new and existing areas.
⏱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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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.
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Free design consultation for Sylvania 2224. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Sylvania
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Sylvania 2224. Sutherland Shire Council regulations and local controls are covered on each page.