Centennial Park Home Extension Builder — Live In, Build On
Buildana extends homes across Centennial Park 2021 while you stay in place. 1880s–1920s heritage mansions-era structure, Woollahra Municipal Council rules, weatherproofing during build — all managed locally from Fairfield.
HIA Member
MBA NSW0476 300 300Extending Homes in Centennial Park
A home extension in Centennial Park is grand heritage beside the parklands — 1880s to 1920s mansions on 300 to 800m² blocks, where the park frontage drives the premium and the wing has to be conservation-grade to belong. This is not a place for a quick bolt-on; the architecture and the address both demand better.
The heritage position leads every decision and is mapped before design. The oldest fabric gets licensed lead and asbestos handling, and the original footings — well over a century old on many of these — are assessed wherever the new wing ties in.
At a $4M to $10M median, the wing is finished to the market's exacting bar, opened toward the parklands where the siting allows so the addition draws on what makes the address what it is.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the heritage position mapped, before you commit.
Buildana manages the complete home extension process in Centennial Park — 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 Centennial Park from $150K
- Woollahra Municipal Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1880s–1920s heritage mansions-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Bondi Junction (2 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Grand heritage, grand standard
Centennial Park's mansions deserve conservation-grade wings — additions matched to the 1880s to 1920s architecture, opened toward the parklands where the siting allows, finished to the market's exacting bar.
The park frontage underwrites every metre you add.
Oldest fabric, exact method
Lead paint joins asbestos in the licensed processes on fabric that is often more than a century old.
The original footings are assessed where the wing ties in, and every part of it is priced into the job from the outset.
Home extension builder in Centennial Park — key facts
- Suburb
- Centennial Park, NSW 2021
- Council / LGA
- Woollahra Municipal Council (Woollahra)
- Primary zoning
- R2 Low
- Typical lot size
- 300–800m²
- Soil class
- M
- Median house price
- $4M–$10M
- Home era
- 1880s–1920s heritage mansions
- 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 Centennial Park 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. Centennial Park homes from the 1880s–1920s heritage mansions 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
Extend Your Home in Centennial Park
Free design consultation for Centennial Park 2021. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Centennial Park
Other Buildana services in Centennial Park
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Centennial Park 2021. Woollahra Municipal Council regulations and local controls are covered on each page.