Home Extension Builder Naremburn — Approved in 60 Days
Naremburn 2065 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Willoughby City 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 Naremburn costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Willoughby City Council approvals, and construction under one fixed-price contract.
Extending Homes in Naremburn
A home extension in Naremburn is workers'-cottage work under a close eye. The heritage conservation areas cover most of the inner streets, so the little cottage frontages are protected — which means the wing goes in behind them, designed to the metre on 350 to 550m² blocks where there is no room to be casual.
Old cottages carry their history in the fabric. Pre-war walls put lead paint alongside asbestos, both handled as licensed processes, and the footings can be a century old, so where the new wing ties in they are assessed rather than trusted.
At a $2.4M to $3.4M median, it is the cottage-and-wing combination — character out front, a light-filled modern rear — that the village market actually pays for.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the HCA position checked, before you commit.
Buildana manages the complete home extension process in Naremburn — 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 Naremburn from $150K
- Willoughby City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1900s–1930s (heritage cottages)-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near St Leonards (1.5 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Behind the cottage, to the metre
Naremburn's HCA streets keep their frontages, so the wing works behind — designed to the metre on the tight blocks, opening the kitchen and living, adding bedrooms, drawing light deep into a cottage that never had much.
That village character is exactly why the combination holds its premium.
Century fabric handled
On the pre-war fabric, lead paint and asbestos are handled together under licence, done properly rather than disturbed and left.
The old footings are assessed where the new wing ties in, and every part of it is priced into the job from the outset.
Home extension builder in Naremburn — key facts
- Suburb
- Naremburn, NSW 2065
- Council / LGA
- Willoughby City Council (Willoughby)
- Primary zoning
- R2 Low Density
- Typical lot size
- 350–550m²
- Soil class
- M
- Median house price
- $2.4M–$3.4M
- Home era
- 1900s–1930s
- 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 |
|---|---|
| Small rear extension (up to 30m²) | $110,000 – $220,000 |
| Medium rear/side extension (30–60m²) | $220,000 – $390,000 |
| Large ground-floor extension (60–100m²) | $390,000 – $610,000 |
| Second-storey addition (60–120m²) | $340,000 – $670,000 |
| Wrap-around (ground + 1st floor) | $610,000+ |
| Structural engineering & tie-in | Included |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. We assess your Naremburn home — existing structure, block size (350–550m²), R2 Low Density 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 Naremburn home's streetscape. Multiple design options presented.
⏱The Naremburn construction phase. Fixed price, programmed, supervised. 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. Weekly updates from your project manager.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. 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
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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
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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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Naremburn 2065. Willoughby City Council regulations and local controls are covered on each page.