South Wentworthville Home Extension Builder — Live In, Build On
Buildana extends homes across South Wentworthville 2145 while you stay in place. 1950s–1970s-era structure, Cumberland City Council rules, weatherproofing during build — all managed locally from Fairfield.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in South Wentworthville costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Cumberland City Council approvals, and construction under one fixed-price contract.
South Wentworthville Home Extensions — Fixed Price
A home extension in South Wentworthville is a quiet, sensible upgrade. The suburb runs established post-war and 1960s housing on standard blocks with real backyard depth, close to Wentworthville station and shops, and for most owners a rear addition adds the living space and bedroom a growing family needs without the friction of moving out of the pocket.
The stock extends best rearward. That era's framing suits ground-floor additions and resists second storeys without significant steel, so out is the standard call, and the block depth makes it easy. Where the older homes carry fibro, sheeting and eaves get a licensed asbestos strip-out before new work goes on. No heritage overlays complicate most of the suburb.
What I would check first on your South Wentworthville house: the frame type, any asbestos in older fibro, and the rear yard depth. Those set the clean scope.
We build these fixed-price, licence HBL 487805C. Ask us out for a look before you talk to an agent.
Buildana manages the complete home extension process in South Wentworthville — 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 South Wentworthville from $150K
- Cumberland City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M soil — structural engineering included
- 1950s–1970s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Wentworthville (1 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
A sensible upgrade
The suburb runs established post-war and 1960s housing on standard blocks with real backyard depth, close to Wentworthville station and shops.
For most owners a rear addition adds the living space and bedroom a growing family needs without the friction of moving out of the pocket.
Out, and asbestos handled
That era's framing suits ground-floor additions and resists second storeys without significant steel, so out is the standard call and the block depth makes it easy.
Where the older homes carry fibro, sheeting and eaves get a licensed asbestos strip-out before new work goes on.
Home extension builder in South Wentworthville — key facts
- Suburb
- South Wentworthville, NSW 2145
- Council / LGA
- Cumberland City Council (Cumberland City)
- Primary zoning
- R2 Low Density & R3 Medium Density
- Typical lot size
- 450–650m²
- Soil class
- Class M
- Median house price
- $1.0M–$1.3M
- Home era
- 1950s–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.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $93,000 – $210,000 |
| Moderate extension (multiple openings, roof extended) | $210,000 – $390,000 |
| Complex extension (structural steel portals, re-roofing) | $390,000 – $620,000 |
| Second-storey tie-in (existing house re-engineered) | $360,000 – $670,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. South Wentworthville homes from the 1950s–1970s 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.
⏱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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Other Buildana services in South Wentworthville
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in South Wentworthville 2145. Cumberland City Council regulations and local controls are covered on each page.