Home Extension Sadleir — Design, Approval, Structural, Build
Full-service extensions in Sadleir 2168: structural survey of existing 1960s–1970s home, design, Liverpool City Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
HIA Member
MBA NSW0476 300 300Second-Storey & Rear Additions in Sadleir
A home extension in Sadleir is one of the more affordable ways to gain real space in the Liverpool LGA. The suburb runs established 1960s to 1970s stock on standard blocks, and at a $700K to $850K median the cost of selling, buying bigger and paying stamp duty would swallow most of a decent rear addition. Close to Liverpool CBD, it is an attractive spot to build into rather than leave.
Two things shape the work. This is Liverpool LGA on reactive clay, so new footings must be engineered to move with the old ones rather than crack against them, and where the older homes carry fibro, sheeting and eaves get a licensed asbestos strip-out before anything bolts on. The era's framing points the job to a ground-floor rear addition, which the block depth makes easy.
What I would check first on your Sadleir house: the reactive-clay footing junction, any asbestos in older fibro, and the rear yard depth. Those set the safe, priced scope.
We build these fixed-price, licence HBL 487805C. Compare our quote against an agent's appraisal and decide from there.
Buildana manages the complete home extension process in Sadleir — 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 Sadleir from $150K
- Liverpool City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class H soil — structural engineering included
- 1960s–1970s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Liverpool (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Affordable space
The suburb runs established 1960s to 1970s stock on standard blocks, and at a $700K to $850K median, selling and buying bigger would swallow most of a rear addition in friction.
Close to Liverpool CBD, it is an attractive spot to build into rather than leave.
Clay and asbestos
This is Liverpool LGA on reactive clay, so new footings must be engineered to move with the old ones rather than crack against them.
Where the older homes carry fibro, sheeting and eaves get a licensed asbestos strip-out before anything bolts on, and the era's framing points the job to a ground-floor rear addition.
Home extension builder in Sadleir — key facts
- Suburb
- Sadleir, NSW 2168
- Council / LGA
- Liverpool City Council (Liverpool City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 500–650m²
- Soil class
- Class H
- Median house price
- $700K–$850K
- Home era
- 1960s–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.
Quality Promise
We extend Sadleir 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. Sadleir homes from the 1960s–1970s 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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Free design consultation for Sadleir 2168. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Sadleir
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Sadleir 2168. Liverpool City Council regulations and local controls are covered on each page.