Home Extension Builder Austral — Approved in 60 Days
Austral 2179 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Liverpool City Council in 40–60 days. Construction 12–24 weeks depending on scope.
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MBA NSW0476 300 300Quick Answer
A home extension in Austral costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Liverpool City Council approvals, and construction under one fixed-price contract.
Extending Homes in Austral
A home extension in Austral gets the straight answer — the 2015-onwards release stock rarely needs extending yet, and on the 300 to 450m² blocks the addition has to be designed to the metre when it genuinely does.
The legacy homes predating the release are the other story: those take generous wings with real freedom, and the growth precinct keeps lifting the land beneath them.
The Class H junctions are engineered either way.
We build these fixed-price, licence HBL 487805C. Tell me what you have and I will give you the honest read.
Buildana manages the complete home extension process in Austral — 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 Austral from $150K
- Liverpool City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class H soil — structural engineering included
- 2015–present-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Leppington (2 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Two Australs, two answers
The release stock rarely needs extending yet, and I tell you that plainly. The legacy homes on the bigger holdings take generous wings — and the precinct's growth keeps lifting the value beneath the work.
Where a release plan is genuinely outgrown, the addition is designed to the metre.
The Class H junction
Reactive Class H clay sits under these blocks, so the junction is engineered to keep the wing and the house moving together.
The junction is engineered and priced from the outset.
Home extension builder in Austral — key facts
- Suburb
- Austral, NSW 2179
- Council / LGA
- Liverpool City Council (Liverpool City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 300–450m²
- Soil class
- Class H
- Median house price
- $800K–$1.0M
- Home era
- 2015–present
- 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.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $81,000 – $180,000 |
| Moderate extension (multiple openings, roof extended) | $180,000 – $340,000 |
| Complex extension (structural steel portals, re-roofing) | $340,000 – $540,000 |
| Second-storey tie-in (existing house re-engineered) | $320,000 – $590,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. Austral homes from the 2015–present 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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Other Buildana services in Austral
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Austral 2179. Liverpool City Council regulations and local controls are covered on each page.