Home Extension Builder Wentworthville — Approved in 60 Days
Wentworthville 2145 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Cumberland City Council in 40–60 days. Construction 12–24 weeks depending on scope.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in 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.
Second-Storey & Rear Additions in Wentworthville
A home extension in Wentworthville weighs the zoning first — the R3 pockets carry development value that can outvote the wing, while the R2 streets extend confidently on the era read.
The post-war stock takes the rear wing where the bones are brick, with the asbestos handled by licensed strip-out and the footings engineered.
At the $1.0M to $1.3M median with the rail keeping demand strong, the staying maths works where the zoning supports it.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the zoning checked, before you commit.
Buildana manages the complete home extension process in 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 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 station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The check before the wing
Wentworthville's R3 pockets can carry value the extension cannot match — checked first. On the R2 streets, the post-war brick takes the rear wing confidently and the rail-side demand holds the result.
Tired fibro gets the rebuild comparison before the design is drawn.
Era handled properly
The post-war asbestos gets licensed strip-out, and the footings are engineered.
The strip-out and the footing work both sit in the quote up front.
Home extension builder in Wentworthville — key facts
- Suburb
- 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.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. 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.
⏱Quality Promise
Our Wentworthville home extensions connect old-to-new cleanly. Matched brickwork, tied roofline, no awkward transitions.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $92,000 – $200,000 |
| Moderate extension (multiple openings, roof extended) | $200,000 – $390,000 |
| Complex extension (structural steel portals, re-roofing) | $390,000 – $610,000 |
| Second-storey tie-in (existing house re-engineered) | $360,000 – $660,000 |
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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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
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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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Other Buildana services in Wentworthville
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Wentworthville 2145. Cumberland City Council regulations and local controls are covered on each page.