Home Extension Builder Woolwich — From $150K Fixed Price
Fixed-price home extensions in Woolwich 2110. Rear extension $150K–$300K, second storey $300K–$500K. Hunters Hill Council approvals managed. Free site consult.
HIA Member
MBA NSW0476 300 300Second-Storey & Rear Additions in Woolwich
A home extension in Woolwich is built to the harbour-front standard — heritage mansions on 700 to 2,000m² blocks at the peninsula tip, where the addition claims the water properly and the conservation controls set the frame.
The sandstone fall shapes the engineering, foreshore lines apply at the water, and the pre-war fabric gets licensed handling.
In the $5M to $15M+ harbour-front market, conservation-grade execution is the baseline.
We build these fixed-price, licence HBL 487805C. Walk us over the block and we will show you what the position allows.
Buildana manages the complete home extension process in Woolwich — 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 Woolwich from $150K
- Hunters Hill Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone bedrock — structural engineering included
- 1880s–1940s heritage mansions + premium contemporary-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Wollstonecraft (6 km, ferry from Woolwich wharf) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Claim the harbour properly
Woolwich's peninsula-tip positions reward additions that open to the water with intent — view levels, glazed living, terraces stepped down the fall — engineered on the sandstone and held within the foreshore line.
The heritage mansions extend behind their conserved character.
The standard is the standard
At this market's level, marine-grade materials, exact detailing and heritage-literate design are baseline, not upgrade.
None of it is an upgrade line item — it is in the fixed price from the outset.
Home extension builder in Woolwich — key facts
- Suburb
- Woolwich, NSW 2110
- Council / LGA
- Hunters Hill Council (Hunters Hill Council)
- Primary zoning
- R2 Low Density
- Typical lot size
- 700–2,000m²
- Soil class
- Hawkesbury Sandstone bedrock
- Median house price
- $5M–$15M+ (harbour-front)
- Home era
- 1880s–1940s heritage mansions + 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 Woolwich 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. Woolwich homes from the 1880s–1940s heritage mansions + 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
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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Extend Your Home in Woolwich
Free design consultation for Woolwich 2110. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Woolwich
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Woolwich 2110. Hunters Hill Council regulations and local controls are covered on each page.