Dulwich Hill Home Extension Builder — Live In, Build On
Buildana extends homes across Dulwich Hill 2203 while you stay in place. 1900s–1930s + 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 Dulwich Hill 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.
Second-Storey & Rear Additions in Dulwich Hill
A home extension in Dulwich Hill is inner-west semi-and-cottage work with the light rail running through it. The Federation stock sits on 200 to 450m² blocks around a genuine village strip, so the addition goes backwards with craft — the frontage stays, and the rear becomes the light-filled living the narrow original never had.
On the attached semis the party walls are assessed before any structural move, and the pre-war fabric gets its lead and asbestos handled under licence. A rear rework opened to the courtyard, sometimes with an attic level where the roof allows, is where these homes gain the most.
At a $1.9M to $2.9M median, an addition beats trading out of the village orbit — the light rail and the strip are the lifestyle, and building keeps you in it.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the heritage position checked, before you commit.
Buildana manages the complete home extension process in Dulwich Hill — 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 Dulwich Hill from $150K
- Inner West Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1900s–1930s + apartments-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Dulwich Hill (T3 + Light Rail, in suburb) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The village grows backwards
Dulwich Hill's semis and cottages extend backwards with craft — kitchen-living opened onto the courtyard, attic levels where the roof allows — with the light rail and village strip holding demand.
The 200 to 450m² blocks reward a design worked to the metre.
Fabric and walls handled
On the attached stock, party walls are assessed before any structural move.
Lead and asbestos come out under licence, with the cost in the fixed price from the outset.
Home extension builder in Dulwich Hill — key facts
- Suburb
- Dulwich Hill, NSW 2203
- Council / LGA
- Inner West Council (Inner West)
- Primary zoning
- R1/R2 General/Low
- Typical lot size
- 200–450m²
- Soil class
- M
- Median house price
- $1.9M–$2.9M
- Home era
- 1900s–1930s + 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.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. Dulwich Hill homes from the 1900s–1930s + 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.
⏱Quality Promise
Every Buildana home extension in Dulwich Hill is delivered under a fixed-price contract — from design consultation through to defect-free handover.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $95,000 – $210,000 |
| Moderate extension (multiple openings, roof extended) | $210,000 – $400,000 |
| Complex extension (structural steel portals, re-roofing) | $400,000 – $630,000 |
| Second-storey tie-in (existing house re-engineered) | $370,000 – $680,000 |
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
Extend, Don't Move — Dulwich Hill
Free design consultation for Dulwich Hill 2203. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Dulwich Hill
Other Buildana services in Dulwich Hill
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Dulwich Hill 2203. Inner West Council regulations and local controls are covered on each page.