Home Extension Builder Dundas — Approved in 60 Days
Dundas 2117 extensions with tight approval timelines. CDC where eligible (~15 days), DA via City of Parramatta 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 Dundas costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, City of Parramatta Council approvals, and construction under one fixed-price contract.
Dundas Home Extensions — Fixed Price
A home extension in Dundas builds into land the light rail is about to reprice. The new Parramatta Light Rail runs through the suburb, and the Federation cottages, inter-war homes and post-war brick on 500 to 800m² R2 lots sit at a $1.5M to $2.0M median that the connection is likely to lift. Holding and improving beats selling into that change.
The suburb falls toward the Parramatta River, so the ground is Wianamatta Shale with sandstone outcrops on the river-fall edge, and lots down the slope need footings priced to the rock. The era mix decides up or out, with early double brick carrying a storey and post-war stock favouring a rear addition. Heritage Conservation Area pockets watch certain frontages.
What I would check first on your Dundas block: the sandstone on the river-fall edge, the era of the walls, and any heritage pocket. Those three shape both the method and the budget.
We build these fixed-price, licence HBL 487805C. Get us to read your block before the light rail finishes pricing it.
Buildana manages the complete home extension process in Dundas — 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 Dundas from $150K
- City of Parramatta Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1900s–1960s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Dundas (Parramatta 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
Ahead of the light rail
The new Parramatta Light Rail runs through Dundas, and the Federation, inter-war and post-war stock on 500 to 800m² R2 lots sits at a $1.5M to $2.0M median the connection is likely to lift.
Holding and improving what you own beats selling into that change.
River-fall ground
Dundas falls toward the Parramatta River, so the ground is Wianamatta Shale with sandstone outcrops along the river-fall edge, and lots down the slope need footings priced to the rock.
Home extension builder in Dundas — key facts
- Suburb
- Dundas, NSW 2117
- Council / LGA
- City of Parramatta Council (City of Parramatta)
- Primary zoning
- R2 Low
- Typical lot size
- 500–800m²
- Soil class
- M
- Median house price
- $1.5M–$2.0M
- Home era
- 1900s–1960s
- 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 |
|---|---|
| Adding a master suite (1900s–1960s Dundas home) | $130,000 – $280,000 |
| Kitchen/living open-out to backyard | $150,000 – $350,000 |
| Second storey for teenagers/office | $280,000 – $550,000 |
| Extension + bathroom (growing family) | $200,000 – $400,000 |
| Full rear + roof tie-in (entertainer's zone) | $350,000 – $600,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
On-site assessment of your 1900s–1960s-era home in Dundas. We check structural condition, block dimensions (500–800m²), setback availability, and City of Parramatta Council's DCP requirements.
⏱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.
⏱We lodge your extension approval — CDC for eligible designs or DA through City of Parramatta Council. Full documentation including structural engineering for Class M soil, BASIX, and shadow diagrams.
⏱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.
⏱Final inspection, Occupation Certificate, 6-year structural warranty. Your Dundas home now has the space your family needs.
⏱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
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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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