Lewisham Home Extension Builder — Live In, Build On
Buildana extends homes across Lewisham 2049 while you stay in place. 1880s–1920s + apartments-era structure, Inner West Council rules, weatherproofing during build — all managed locally from Fairfield.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Lewisham costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Inner West Council approvals, and construction under one fixed-price contract.
Lewisham Home Extensions — Fixed Price
A home extension in Lewisham has connectivity most inner-west pockets would envy — two stations, heavy rail and light rail, within reach of the same 1880s to 1920s terraces and semis on 150 to 400m² blocks. That twin-rail position keeps demand steady, and the addition works backwards with craft under the heritage pockets to meet it.
The method is terrace method: party walls assessed before any structural move, the oldest fabric handled under licence, and a rear rework — sometimes with an attic level where the roof allows — opening the narrow plan to light. The build is sequenced because access is tight.
At a $1.7M to $2.7M median, an addition beats trading out of a pocket this well connected — you keep both rail lines on the doorstep and add the space the terrace never had.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the sequencing planned, before you commit.
Buildana manages the complete home extension process in Lewisham — 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 Lewisham from $150K
- Inner West Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1880s–1920s + apartments-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Lewisham (T2, in suburb) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Twin rails, tight craft
Lewisham's terraces and semis extend backwards with craft — kitchen-living opened up, attic levels where the roof allows — with two stations holding the position's demand.
The 150 to 400m² blocks reward a design worked to the metre.
Fabric and walls handled
Party walls get assessed across the attached stock before anything structural starts.
Lead and asbestos are stripped under licence, costed into the fixed price up front.
Home extension builder in Lewisham — key facts
- Suburb
- Lewisham, NSW 2049
- Council / LGA
- Inner West Council (Inner West)
- Primary zoning
- R1/R2 General/Low
- Typical lot size
- 150–400m²
- Soil class
- M
- Median house price
- $1.7M–$2.7M
- Home era
- 1880s–1920s + 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
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) | $90,000 – $200,000 |
| Moderate extension (multiple openings, roof extended) | $200,000 – $380,000 |
| Complex extension (structural steel portals, re-roofing) | $380,000 – $600,000 |
| Second-storey tie-in (existing house re-engineered) | $350,000 – $650,000 |
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. Lewisham homes from the 1880s–1920s + apartments 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
Add Space to Your Lewisham Home
Free design consultation for Lewisham 2049. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Lewisham
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Lewisham 2049. Inner West Council regulations and local controls are covered on each page.