Home Extension Builder Engadine — From $150K Fixed Price
Fixed-price home extensions in Engadine 2233. Rear extension $150K–$300K, second storey $300K–$500K. Sutherland Shire Council approvals managed. Free site consult.
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MBA NSW0476 300 300Quick Answer
A home extension in Engadine costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Sutherland Shire Council approvals, and construction under one fixed-price contract.
Second-Storey & Rear Additions in Engadine
A fair chunk of Engadine's housing stock will not take a second storey as it stands, and any builder who quotes a first-floor home extension without saying so is quoting blind. The suburb's 1960s to 1990s fibro and brick veneer homes were framed for one level. Adding another means steel posts and beams carried down to new footings, often in Hawkesbury sandstone that needs cutting. The honest answer is that going out is usually smarter here.
Fortunately the blocks allow it. At 550 to 800m², most Engadine yards absorb a rear family-room extension easily. Lots on the eastern edge backing the Royal National Park carry BAL ratings up to flame zone, so extension materials get specified accordingly. We handle that paperwork routinely in the Shire.
What I would check first on your Engadine house: whether the frame can carry a storey at all, the rock under any dig, and the BAL rating if you back the park. Those set the scope and the budget.
We build these fixed-price, licence HBL 487805C. Get a structural assessment before you fall in love with a second-storey sketch.
Buildana manages the complete home extension process in Engadine — 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 Engadine from $150K
- Sutherland Shire Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone bedrock — structural engineering included
- 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore)-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Engadine station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Most of the stock goes out
Engadine's 1960s to 1990s fibro and brick veneer homes were framed for one level. Going up means steel posts and beams carried down to new footings, often through Hawkesbury sandstone that needs cutting.
Any builder quoting a first-floor addition without flagging that is quoting blind. The honest answer for most of this stock is that a rear extension is the smarter spend.
The blocks make it easy
At 550 to 800m², most Engadine yards absorb a rear family-room extension without crowding anything.
Lots on the eastern edge backing the Royal National Park carry BAL ratings up to flame zone, so windows, cladding and decking get specified to match. We handle that Shire paperwork routinely.
Home extension 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
- $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.
How It Works
From First Call to Final Key
Free consultation at your Engadine home. We inspect the existing structure, check Sutherland Shire Council's controls, measure available space, and discuss what you need.
⏱Two design moves are usually on the table: match the existing house so the extension reads as original, or contrast with it so the new section is clearly modern. Both work — choice is aesthetic, and we'll show 3D renders of both before you commit.
⏱CDC (10–15 business days) or DA through Sutherland Shire Council depending on scope. Structural engineering, BASIX, and all documentation prepared and lodged.
⏱Construction phase connects new to existing — footings, frame, roof tie-in, waterproofing at junction, internal fit-out and external finish. Staged works minimise disruption to your daily routine in Engadine.
⏱Final inspection focuses on the integration: paint blend, flooring transitions, ceiling height, junction waterproofing, sound transmission. The extension shouldn't feel bolted on — it should feel like the house was always meant to be this size.
⏱Quality Promise
We extend Engadine homes with a structural engineer on every job. Second storey, rear addition, multi-room — engineered and priced upfront.
Cost Guide
| Item | Estimated Range |
|---|---|
| Adding a master suite (1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore) Engadine home) | $130,000 – $280,000 |
| Kitchen/living open-out to backyard | $150,000 – $350,000 |
| Second storey for teenagers/office | $280,000 – $550,000 |
| Extension + bathroom (growing family) | $200,000 – $400,000 |
| Full rear + roof tie-in (entertainer's zone) | $350,000 – $600,000 |
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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Last updated: 1 April 2026
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Free design consultation for Engadine 2233. We'll assess your home, design the extension, and provide a fixed-price quote.
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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.