Home Extension Hammondville — Design, Approval, Structural, Build
Full-service extensions in Hammondville 2170: structural survey of existing 1950s–1970s home, design, Liverpool City Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
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MBA NSW0476 300 300Quick Answer
A home extension in Hammondville 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.
Second-Storey & Rear Additions in Hammondville
A home extension in Hammondville runs the era check honestly — the post-war and 1970s stock splits between brick worth extending and fibro where the rebuild comparison wins, and I say which yours is first.
Where the extension proceeds, the post-war asbestos gets licensed strip-out, the Class H clay gets engineered junctions, and the river-side blocks get the flood mapping checked.
At the $900K to $1.1M median with Holsworthy station close, the staying maths works where the house deserves it.
We build these fixed-price, licence HBL 487805C. Ask us to measure what your block can hold.
Buildana manages the complete home extension process in Hammondville — 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 Hammondville from $150K
- Liverpool City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class H soil — structural engineering included
- 1950s–1970s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Holsworthy station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The honest era conversation
Hammondville's post-war stock is old enough that the extend-or-rebuild question is real — solid brick rewards the wing, tired fibro often does not, and the answer decides the spend.
The station keeps the location practical either way.
Asbestos, clay and the river edge
The post-war asbestos gets licensed strip-out, the Class H junctions are engineered, and the flood mapping is checked on the Georges River side.
All three are costed up front.
Home extension builder in Hammondville — key facts
- Suburb
- Hammondville, NSW 2170
- Council / LGA
- Liverpool City Council (Liverpool City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 500–650m²
- Soil class
- Class H
- Median house price
- $900K–$1.1M
- Home era
- 1950s–1970s
- 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.
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 1950s–1970s-era home in Hammondville. We check structural condition, block dimensions (500–650m²), setback availability, and Liverpool City 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 Hammondville construction phase. Fixed price, programmed, supervised. We lodge your extension approval — CDC for eligible designs or DA through Liverpool City Council. Full documentation including structural engineering for Class H 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 Hammondville home now has the space your family needs.
⏱Quality Promise
Hammondville home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
Cost Guide
| Item | Estimated Range |
|---|---|
| Small rear extension (up to 30m²) | $87,000 – $170,000 |
| Medium rear/side extension (30–60m²) | $170,000 – $310,000 |
| Large ground-floor extension (60–100m²) | $310,000 – $490,000 |
| Second-storey addition (60–120m²) | $270,000 – $530,000 |
| Wrap-around (ground + 1st floor) | $490,000+ |
| Structural engineering & tie-in | Included |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
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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
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