Home Extension Builder Oatley — Approved in 60 Days
Oatley 2223 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Georges River Council in 40–60 days. Construction 12–24 weeks depending on scope.
HIA Member
MBA NSW0476 300 300Extending Homes in Oatley
A home extension in Oatley works the river fall — heritage homes on 500 to 800m² blocks where the ground drops toward the Georges River and the level up claims water the originals never saw.
The heritage streets extend behind their conserved faces, the sandstone fall shapes the engineering, and the premium contemporary infill sets the bar.
At the $2.2M to $3.5M river-fall premium, the addition done exactly is the natural investment.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the view line checked, before you commit.
Buildana manages the complete home extension process in Oatley — 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 Oatley from $150K
- Georges River Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1900s–1950s heritage + premium contemporary-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Oatley station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The river is one level up
Oatley's fall toward the Georges River puts water views a storey above most original rooflines — and the set-back addition claims them while the conserved heritage face keeps the street.
The village-and-park position holds every metre added.
Rock and fabric handled
The sandstone gets read before any dig, and on the pre-war fabric lead paint sits alongside asbestos — both licensed processes.
Both the rock read and the licensed strip-out are costed up front.
Home extension builder in Oatley — key facts
- Suburb
- Oatley, NSW 2223
- Council / LGA
- Georges River Council (Georges River Council)
- Primary zoning
- R2 Low Density
- Typical lot size
- 500–800m²
- Soil class
- M
- Median house price
- $2.2M–$3.5M (river-fall premium)
- Home era
- 1900s–1950s heritage + premium contemporary
- 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
We extend Oatley homes with a structural engineer on every job. Second storey, rear addition, multi-room — engineered and priced upfront.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. Oatley homes from the 1900s–1950s heritage + premium contemporary 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
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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
Add Space to Your Oatley Home
Free design consultation for Oatley 2223. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Oatley
Other Buildana services in Oatley
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Oatley 2223. Georges River Council regulations and local controls are covered on each page.