Licensed Home Extension Builder Arncliffe
NSW licensed extension specialist. Arncliffe 2205 extensions on 1920s–1970s + apartments-era homes require structural sign-off, Class M footings, and matched connection — we engineer and document properly.
HIA Member
MBA NSW0476 300 300Home Extension Builder in Arncliffe
A home extension in Arncliffe usually beats trading up, and the reason is stamp duty: on a $1.5M to $2.4M purchase it runs well past $60K before you have moved a single box. The stock splits cleanly. Inter-war brick around the older streets will carry a first-floor addition on its original walls, while the post-war fibro pockets need steel before they take anything above the ceiling line. Two very different jobs, same suburb.
Blocks run 350 to 650m², so plenty of Arncliffe owners have rear yard to spare for a ground-floor extension instead. Watch the alluvial pockets near the Cooks River. Footings there need proper geotech before you add load, or the old part of the house pays for it in cracks. Flight-path acoustic requirements shape glazing choices too.
What I would check first on your Arncliffe house: whether the walls are inter-war brick or post-war fibro, the yard depth, and the soil if you are near the river. Those decide up or out.
We build these fixed-price, licence HBL 487805C. Send us your address and we will tell you which way your house wants to go.
Buildana manages the complete home extension process in Arncliffe — 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 Arncliffe from $150K
- Bayside Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1920s–1970s + apartments-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Arncliffe (T4, in suburb) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Two houses, two methods
Arncliffe's stock splits cleanly. The inter-war brick around the older streets carries a first-floor addition on its original walls, while the post-war fibro pockets need steel before anything goes above the ceiling line.
Knowing which you own is the whole budget conversation, and it is not always obvious from the street. A home extension usually beats trading up here because stamp duty on a $1.5M to $2.4M purchase runs past $60K before you move in.
Out the back, and watch the river
Blocks run 350 to 650m², so plenty of owners have rear yard to spare for a ground-floor extension instead of going up.
The catch is the alluvial ground near the Cooks River. Those footings need proper geotech before any load goes on, or the old part of the house wears it in cracks. Flight-path acoustic glazing on new rooms is worth building in, not retrofitting.
Home extension builder in Arncliffe — key facts
- Suburb
- Arncliffe, NSW 2205
- Council / LGA
- Bayside Council (Bayside)
- Primary zoning
- R2 Low
- Typical lot size
- 350–650m²
- Soil class
- M
- Median house price
- $1.5M–$2.4M
- Home era
- 1920s–1970s + apartments
- 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
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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
Arncliffe home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. On-site assessment of your 1920s–1970s + apartments-era home in Arncliffe. We check structural condition, block dimensions (350–650m²), setback availability, and Bayside Council's DCP requirements. Written feasibility and cost estimate provided. Designing an extension is half about the new space and half about how it joins the old one. Doorway position, ceiling height transition, floor level matching, light wells — the junction makes or breaks how the finished home feels.
⏱The Arncliffe construction phase. Fixed price, programmed, supervised. We lodge your extension approval — CDC for eligible designs or DA through Bayside Council. Full documentation including structural engineering for Class M soil, BASIX, and shadow diagrams. CC issued before works start. For ground-floor rear extensions you usually stay in the house during the build, with temporary weatherproofing at the junction wall until the new section is locked up. Second-storey additions need a 4–8 week relocation during the roof-off and frame-up phase.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Final inspection, Occupation Certificate, 6-year structural warranty. Your Arncliffe home now has the space your family needs.
⏱Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
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Frequently Asked Questions
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Liverpool, NSW
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Last updated: 1 April 2026
Extend, Don't Move — Arncliffe
Free design consultation for Arncliffe 2205. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Arncliffe
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Arncliffe 2205. Bayside Council regulations and local controls are covered on each page.