Home Extension Builder Granville — From $150K Fixed Price
Fixed-price home extensions in Granville 2142. Rear extension $150K–$300K, second storey $300K–$500K. Cumberland City Council approvals managed. Free site consult.
HIA Member
MBA NSW0476 300 300Home Extension Builder in Granville
A home extension in Granville respects the character first — the heritage precinct's 1920s-60s homes extend best with the period frontage untouched and the new wing working behind it.
The rear addition suits the stock: extra bedrooms, second living and a modern kitchen across the back, with the pre-war fabric's lead and asbestos handled by licensed process.
On the R3 pockets, the zoning is checked before the spend. At the $950K to $1.2M median, extending keeps the character home and the station walk.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the heritage position checked, before you commit.
Buildana manages the complete home extension process in Granville — 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 Granville from $150K
- Cumberland City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M soil — structural engineering included
- 1920s–1960s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Granville station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Behind the character, not through it
Granville's character homes extend the right way — the period frontage stays untouched and the new wing builds behind: modern kitchen, living and bedrooms across the rear, invisible from the street.
In the heritage precinct, the position is checked before design so the approval path is clean.
Pre-war fabric handled
Lead paint joins asbestos in the pre-war checks, licensed processes both, and the old footings are assessed where the new wing ties in.
Both the licensed processing and the footing assessment sit in the quote up front.
Home extension builder in Granville — key facts
- Suburb
- Granville, NSW 2142
- Council / LGA
- Cumberland City Council (Cumberland City)
- Primary zoning
- R2 Low Density & R3 Medium Density
- Typical lot size
- 450–700m²
- Soil class
- Class M
- Median house price
- $950K–$1.2M
- Home era
- 1920s–1960s
- 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.
Quality Promise
Every Buildana home extension in Granville is delivered under a fixed-price contract — from design consultation through to defect-free handover.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. Free consultation at your Granville home. We inspect the existing structure, check Cumberland City Council's controls, measure available space, and discuss what you need. You get a clear scope, budget range, and timeline before committing. 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.
⏱The Granville construction phase. Fixed price, programmed, supervised. CDC (10–15 business days) or DA through Cumberland City Council depending on scope. Structural engineering, BASIX, and all documentation prepared and lodged. Construction Certificate obtained. 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 Granville.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. 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.
⏱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
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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 Granville
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Granville 2142. Cumberland City Council regulations and local controls are covered on each page.