Home Extension Builder Dundas Valley — Approved in 60 Days
Dundas Valley 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.
HIA Member
MBA NSW0476 300 300Dundas Valley Home Extensions & Additions
A home extension in Dundas Valley grows the mid-century home — 1950s-1970s stock on 550 to 750m² blocks where the original plans are small and the wing fixes exactly that.
The era fabric gets licensed handling, the valley clay gets engineered junctions, and the green-belt setting holds the result.
At the $1.4M to $1.9M median, the wing shifts liveability meaningfully at an entry the district rarely offers.
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 Dundas Valley — 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 Valley from $150K
- City of Parramatta Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — 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 Dundas (Parramatta Light Rail, 1.2 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Small plans, real room
Dundas Valley's mid-century homes were built compact, but the blocks were not — the rear wing adds the living and bedrooms the era never included, with the valley's green setting kept.
The entry pricing makes the addition genuinely additive.
Era and clay handled
Asbestos gets the licensed strip-out where the fabric is disturbed, and the junctions are engineered on the reactive ground.
The strip-out and the engineering both sit in the quote from the start.
Home extension builder in Dundas Valley — key facts
- Suburb
- Dundas Valley, NSW 2117
- Council / LGA
- City of Parramatta Council (City of Parramatta)
- Primary zoning
- R2 Low
- Typical lot size
- 550–750m²
- Soil class
- M
- Median house price
- $1.4M–$1.9M
- 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.
Quality Promise
Dundas Valley home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
How It Works
From First Call to Final Key
We assess your Dundas Valley home — existing structure, block size (550–750m²), R2 Low zoning, setbacks, FSR, and your space requirements. You'll know what's achievable before spending on detailed design.
⏱Design phase covers the extension layout, junction with existing structure, window and door placement, and external finish to match your Dundas Valley home's streetscape. Multiple design options presented.
⏱Documentation pack covers structural engineering for the new footings sized to match existing depths on Class M soil, BASIX 2025 compliance, shadow diagrams to neighbours' POS, hydraulic, and detailed sections through the wall-tie junction. Approval-grade, not concept-grade.
⏱Fixed-price construction of your extension. New footings engineered for Class M soil, structural connection to existing home, frame, fit-out, and finishes.
⏱Handover documentation covers the new work specifically — OC for the extension, structural certs, BASIX certificate updates, and warranty for the new section plus the junction detailing. Existing house remains under whatever warranty position applied before.
⏱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
Start a Dundas Valley Home Extension
Free design consultation for Dundas Valley 2117. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Dundas Valley
Other Buildana services in Dundas Valley
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Dundas Valley 2117. City of Parramatta Council regulations and local controls are covered on each page.