Birrong Home Extension Builder — Live In, Build On
Buildana extends homes across Birrong 2143 while you stay in place. 1940s–1970s-era structure, Canterbury-Bankstown Council rules, weatherproofing during build — all managed locally from Fairfield.
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MBA NSW0476 300 300Quick Answer
A home extension in Birrong costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Canterbury-Bankstown Council approvals, and construction under one fixed-price contract.
Birrong Home Extensions — Fixed Price
A home extension in Birrong gives you a lot of return for a modest starting point. These are post-war homes on standard blocks a short walk from the station, and at this end of the market the money you put into a rear wing tends to move the needle further than the same spend would in a dearer suburb. You keep the train on your doorstep and add the room the family has run out of.
The house has to be worth it, mind. Brick with sound bones takes the wing; fibro that is genuinely tired gets a rebuild comparison instead. Fibro exposed during the work is stripped out under licence before framing, and the footings are engineered to your ground.
At a $950K to $1.15M median the value maths leans hard in favour of building. The rail keeps demand steady underneath whatever the read on your particular house turns out to be.
We build these fixed-price, licence HBL 487805C. Ask us to measure what your block can hold.
Buildana manages the complete home extension process in Birrong — 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 Birrong from $150K
- Canterbury-Bankstown Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M soil — structural engineering included
- 1940s–1970s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Birrong station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Value with the rail attached
Birrong's accessible entry and the walk to the station make the extension maths generous — bedrooms and living added at a cost the median rewards, with the rail keeping demand steady.
Before drawing anything I read the house honestly, so the spend goes into a home that will actually return it.
Fibro and footings, cleared first
If fibro shows up as we open the walls, it is stripped out under licence before new framing goes in.
The footings are engineered to the ground under your slab, and both jobs sit inside the fixed price from the start.
Home extension builder in Birrong — key facts
- Suburb
- Birrong, NSW 2143
- Council / LGA
- Canterbury-Bankstown Council (Canterbury-Bankstown)
- Primary zoning
- R2 Low Density
- Typical lot size
- 500–700m²
- Soil class
- Class M
- Median house price
- $950K–$1.15M
- Home era
- 1940s–1970s
- 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
Walk through your Birrong home with our designer and structural engineer. We measure, photograph, and check the bones — footings, frame condition, roof structure. The cost estimate that follows is grounded in what we found, not a generic per-m² number.
⏱Our designer works with your existing home's layout — connecting new living areas to existing rooms, matching materials and roof pitch, and maximising natural light. You approve floor plans and 3D renders before we proceed.
⏱Most rear extensions in Birrong qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through Canterbury-Bankstown Council because of overshadowing and privacy assessments. We choose based on your design, not on what's easier to lodge.
⏱Extension built from new footings to completion — connecting structurally to your existing home. Class M soil design managed. Temporary weatherproofing maintains liveability where possible.
⏱Walk through the completed extension, confirm finishes, collect your OC. Six-year structural warranty covers all new work including the junction with your existing home. Maintenance guide provided.
⏱Quality Promise
Buildana's Birrong home extension process: assess the existing structure, design the addition, approve, build. Fixed price throughout.
Cost Guide
| Item | Estimated Range |
|---|---|
| Single-room addition (bedroom/study) | $63,000 – $150,000 |
| Kitchen/living extension | $160,000 – $370,000 |
| Master suite + ensuite addition | $140,000 – $290,000 |
| Second storey (full or partial) | $290,000 – $580,000 |
| Multi-room ground floor wrap | $370,000 – $630,000 |
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
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
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
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