Home Extension Kirrawee — Design, Approval, Structural, Build
Full-service extensions in Kirrawee 2232: structural survey of existing 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore) home, design, Sutherland Shire Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
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MBA NSW0476 300 300Quick Answer
A home extension in Kirrawee 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.
Extending Homes in Kirrawee
Kirrawee is changing fast around the station, with apartment towers on the old Brick Pit and R3 zoning spreading through the precinct, but the home extension logic on the suburb's residential streets has not changed at all. The 1960s to 1990s fibro and brick veneer houses on 550 to 800m² blocks extend rearward beautifully and go upward reluctantly. That era's framing needs real steel before it carries a second storey.
So the standard Kirrawee project is a ground-floor rear extension: living space, extra bedroom, sometimes a full parents' retreat across the back, sitting on sandstone bedrock that occasionally needs cutting, which we price with a test dig rather than a guess. Sutherland Shire's controls are particular but predictable once you know them. We do.
What I would check first on your Kirrawee house: the frame's capacity to carry a storey, and where the sandstone starts under a rear dig. Those decide the approach and the price.
We build these fixed-price, licence HBL 487805C. Ask us for a feasibility figure on your block.
Buildana manages the complete home extension process in Kirrawee — 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 Kirrawee 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 Kirrawee station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The streets extend out, not up
Kirrawee is changing fast around the station, but the residential streets have not. Its 1960s to 1990s fibro and brick veneer houses on 550 to 800m² blocks extend rearward beautifully and go upward with reluctance.
That era's framing needs real steel before it carries a second storey, so the standard project here runs across the back rather than over the top.
Priced on a test dig
The typical build is a ground-floor rear extension: living space, an extra bedroom, sometimes a full parents' retreat, sitting on sandstone bedrock that occasionally needs cutting.
We price that rock with a test dig rather than a guess. Sutherland Shire's controls are particular but predictable once you know them, and we do.
Home extension builder in Kirrawee — key facts
- Suburb
- Kirrawee, NSW 2232
- 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
The first job on an extension is finding out what you're extending onto. Kirrawee homes from the 1960s–1990s fibro/brick veneer predominant + 1990s–2010s brick (Menai/Bangor/Illawong/Alfords Point) + 2010s+ premium contemporary (Cronulla beachside/foreshore) were built to different standards — we open walls, check footings, verify load paths. The existing house has to carry the new work.
⏱Design follows the existing roof. A bad extension looks like a bolt-on; a good one reads as original. Matched brickwork or contrasting render (whichever the architecture calls for), tied-in roofline, continuous flooring where it should be continuous.
⏱Construction happens while you live in the house. That means weatherproofing every night, staging the works so kitchens and bathrooms don't disappear on the same week, and keeping the site clean of debris that doesn't belong in a family home.
⏱Finish is seamless. Paint match, floor match, roofline match, brick match where possible. The only way to tell the extension is new is the date on the plans.
⏱Quality Promise
Kirrawee home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $90,000 – $200,000 |
| Moderate extension (multiple openings, roof extended) | $200,000 – $380,000 |
| Complex extension (structural steel portals, re-roofing) | $380,000 – $600,000 |
| Second-storey tie-in (existing house re-engineered) | $350,000 – $650,000 |
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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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.
Last updated: 1 April 2026
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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Kirrawee 2232. Sutherland Shire Council regulations and local controls are covered on each page.