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.
HIA Member
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
Engadine homeowners with 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore)-era properties are increasingly turning to home extensions to gain space without the disruption of a full move. With typical lots of 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), most Engadine properties can accommodate ground-floor or second-storey extensions under Sutherland Shire Council's planning controls. Buildana manages feasibility, design, approvals, and construction for Engadine extension projects under one fixed-price contract.
Engadine's housing stock is mostly from the 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore), which is the era where structural bones either hold up or don't — and we see plenty of both across the suburb. For extending here, that history matters: asbestos survey before any demolition is non-negotiable, and licensed removal lands somewhere between $5,000 and $25,000 depending on what's actually there. Median price $1.4M–$2.2M mid-tier; $1.8M–$3.8M foreshore; $2.5M–$6.0M+ Cronulla/Burraneer/Lilli Pilli/Caringbah South premium beachside on typical 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) blocks. Class Hawkesbury Sandstone bedrock predominant (saw-cutting, rock-anchoring $30K–$120K above standard substructure) / Class P/E coastal alluvial on Cronulla/Kurnell sand bodies / coastal hazard + Coastal Management Act 2016 overlay on beachfront lots / Port Hacking foreshore building line on water-frontage ground, foundation cost band $45,000–$80,000.
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
- Class Hawkesbury Sandstone bedrock predominant (saw-cutting, rock-anchoring $30K–$120K above standard substructure) / Class P/E coastal alluvial on Cronulla/Kurnell sand bodies / coastal hazard + Coastal Management Act 2016 overlay on beachfront lots / Port Hacking foreshore building line on water-frontage soil — 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
Why Extend Your Home in Engadine?
Engadine is the bushland-fringe residential suburb backing onto Royal National Park — 1960s–1990s fibro and brick veneer on 550–800m² R2 blocks with BAL-19 to BAL-29 typical, BAL-40/FZ on the eastern bushland edge. RFS BPA mandatory on most rebuilds. Hawkesbury Sandstone bedrock with rock-cutting and BAL-rated substructure detailing required.
Engadine's mix of 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore)-era housing on 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) blocks creates strong opportunity for property improvement. Median prices of $1.4M–$2.2M mid-tier; $1.8M–$3.8M foreshore; $2.5M–$6.0M+ Cronulla/Burraneer/Lilli Pilli/Caringbah South premium beachside support quality build investment. Engadine benefits from Engadine station on the doorstep — walkable rail access lifts both rental demand and property values. 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore)-era homes in Engadine often have good structural foundations worth building on. Extensions add living space at a fraction of the full rebuild cost. Soil conditions in Engadine (Class Hawkesbury Sandstone bedrock predominant (saw-cutting, rock-anchoring $30K–$120K above standard substructure) / Class P/E coastal alluvial on Cronulla/Kurnell sand bodies / coastal hazard + Coastal Management Act 2016 overlay on beachfront lots / Port Hacking foreshore building line on water-frontage, extremely reactive) are factored into every Buildana foundation design.
Extensions in Sutherland Shire are dominant scope across most of the LGA given sandstone substructure complexity and BAL/Coastal Management/heritage controls that complicate KDR. Common scope: rear kitchen-living additions, second-storey additions on solid post-war footings, master suite wings, alfresco enclosures, foreshore deck/pool work. Sandstone rock excavation $20K–$80K on second-storey/footing-strengthening work. BAL-rated specs on Engadine/Heathcote/Bundeena/Menai/Bangor bushland-fringe extensions exceeding 50% original floor area. Coastal Management Act applies to extensions on Port Hacking/Burraneer Bay/Gunnamatta Bay foreshore — coastal hazard reports, NSW Crown Lands referral, restricted setback alteration. Heritage Conservation Areas in Cronulla beach village core, Sutherland CBD restrict scope on protected stock. Realistic budget $300K–$650K for 60–120m² inland; $500K–$1.4M premium foreshore with Coastal Management/sandstone/heritage layered. Pre-construction 4–8 months on standard sites; 9–14 months on Coastal Management/foreshore.
Home extension builder in Engadine — key facts
- Suburb
- Engadine, NSW 2233
- Council / LGA
- Sutherland Shire Council (Sutherland Shire)
- Primary zoning
- R2 Low Density predominant / R3 Medium Density on Cronulla/Caringbah/Miranda/Kirrawee/Sutherland/Engadine station precincts / E3/E4 Environmental on Royal NP fringe
- 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
- Class Hawkesbury Sandstone bedrock predominant (saw-cutting, rock-anchoring $30K–$120K above standard substructure) / Class P/E coastal alluvial on Cronulla/Kurnell sand bodies / coastal hazard + Coastal Management Act 2016 overlay on beachfront lots / Port Hacking foreshore building line on water-frontage
- 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 (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore)
- 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
Building in Engadine — Local Context
Foundations & Slab Design for Engadine
Engadine's ground is extremely reactive clay (Class Hawkesbury Sandstone bedrock predominant (saw-cutting, rock-anchoring $30K–$120K above standard substructure) / Class P/E coastal alluvial on Cronulla/Kurnell sand bodies / coastal hazard + Coastal Management Act 2016 overlay on beachfront lots / Port Hacking foreshore building line on water-frontage). On a 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) block, that translates to engineered slab work in the $45,000–$80,000 bracket for a extension. Double-check any quote that doesn't itemise the slab — 'slab as per engineering' usually means the builder will hit you with a variation once the soil report comes back. We commission the geotech upfront, before pricing, so the cost in your contract reflects what your block actually needs. If your neighbour's home shows movement cracks above architraves or below window sills, that's a signal worth knowing before you finalise design — Buildana's site assessment looks at adjacent stock too.
Sutherland Shire Council & Approval Pathway
Engadine sits inside the Sutherland Shire LGA, governed by Sutherland Shire Council. For a home extension, the approval question is usually CDC vs DA. Extensions in Engadine usually need a full DA through Sutherland Shire Council — typically 40–90+ days from lodgement, longer if neighbour notification triggers objections. Either way, we manage submission, RFIs, and re-lodgement in-house — you don't deal with the council.
Where the Money Goes on a Engadine Extension
Cost breakdown for a typical extension in Engadine: structure and frame around 30%, slab and foundations 8–14% (driven by Class Hawkesbury Sandstone bedrock predominant (saw-cutting, rock-anchoring $30K–$120K above standard substructure) / Class P/E coastal alluvial on Cronulla/Kurnell sand bodies / coastal hazard + Coastal Management Act 2016 overlay on beachfront lots / Port Hacking foreshore building line on water-frontage soil), roofing and external 10–12%, services (plumbing, electrical, HVAC) 12–18%, fit-out (kitchen, bathrooms, joinery) 18–25%, and finishes (paint, tiles, flooring) 8–12%. The remaining 4–6% covers approvals, certifications, and site establishment. Buildana itemises every line so you see what you're paying for — no lump sums hiding margin.
Designing for the Engadine Streetscape
Engadine's housing stock is predominantly from the 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore).. The local anchor is Engadine Town Centre + Royal National Park entry + The Kingsway. For a home extension, the streetscape question matters more than most builders admit — a brand-new double-storey on a street of single-storey 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore) weatherboards will draw council attention on bulk and scale, even if technically compliant. Buildana designs the front elevation to read appropriately for the street while modernising the floor plan and structure behind it. Materials palette, roof pitch, fenestration rhythm — all chosen to settle into the existing rhythm rather than fight it.
Why Some Engadine Builds Stall
Builds in Engadine stall for predictable reasons. Lodgement defects (missing BASIX, wrong drawing scale, undeclared overlays). Soil surprises on Class Hawkesbury Sandstone bedrock predominant (saw-cutting, rock-anchoring $30K–$120K above standard substructure) / Class P/E coastal alluvial on Cronulla/Kurnell sand bodies / coastal hazard + Coastal Management Act 2016 overlay on beachfront lots / Port Hacking foreshore building line on water-frontage ground when the builder didn't commission a borehole upfront. Variation creep when the contract was light on inclusions. Trade scheduling gaps when the builder is over-committed across too many sites. Sutherland Shire Council delays when neighbour objection triggers committee review. Buildana protects against each of these at contract stage — fully documented lodgement pack, geotech in the price, itemised inclusions instead of allowances, and a tight project-manager-to-job ratio that keeps trades moving.
Builder's Take on Engadine
Timing on Engadine extensions typically runs 14–24 weeks for ground-floor additions, 20–32 weeks for second-storey. Living in the house during the build is possible but requires staging — we plan around it so the kitchen and main bathroom aren't out at the same time.
Matching brick on a Engadine extension: 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore) brick is often discontinued. We specify a close-match or deliberately contrast with render or cladding so the extension reads as intentional, not as a failed match. Done well, an intentional contrast looks better than a forced match.
Have a question about your project?
Talk to our team — free site assessment and fixed-price quote.
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
Estimate Your Build Cost
Use our free calculator to get an instant cost estimate for your project
Ready to take the next step?
Free consultation — no obligation, no pressure.
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.
Last updated: 1 April 2026
Add Space to Your Engadine Home
Free design consultation for Engadine 2233. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your Project