Home Extension Drummoyne — Design, Approval, Structural, Build
Full-service extensions in Drummoyne 2047: structural survey of existing 1900s–1940s + apartments home, design, City of Canada Bay Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
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MBA NSW0476 300 300Quick Answer
A home extension in Drummoyne costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, City of Canada Bay Council approvals, and construction under one fixed-price contract.
Home Extension Builder in Drummoyne
A home extension in Drummoyne works a peninsula sitting between two stretches of water. The Federation and inter-war homes on 350 to 700m² blocks often have a water story to tell, so the wing is built to open the living toward the bay — designed to the metre on the tighter blocks, where light and layout do the work the footprint cannot.
On the conservation streets the frontage is kept and the work goes behind it, and where the blocks drop toward the water the fall is engineered. The pre-war fabric carries lead paint alongside asbestos, both stripped under licence.
At a $2.5M to $6M median, an addition beats trading out of a peninsula position with the Bay Run at the door and the ferry a short walk — you keep the lifestyle and build the house up to it.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with heritage and fall resolved, before you commit.
Buildana manages the complete home extension process in Drummoyne — 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 Drummoyne from $150K
- City of Canada Bay Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M–H — structural engineering included
- 1900s–1940s + apartments-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Drummoyne ferry / Lilyfield Light Rail (across bridge) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Between two waters
Drummoyne's peninsula gives many blocks a water story, and the wing tells it — living opened toward the bay, designed to the metre on the tighter blocks, behind conserved frontages on the conservation streets.
The Bay Run and ferry lifestyle hold every metre you add.
Fall and fabric handled
The fall is engineered where the blocks drop toward the water.
The pre-war fabric's lead and asbestos are removed under licence, every dollar of it in the quote upfront.
Home extension builder in Drummoyne — key facts
- Suburb
- Drummoyne, NSW 2047
- Council / LGA
- City of Canada Bay Council (City of Canada Bay)
- Primary zoning
- R2 Low
- Typical lot size
- 350–700m²
- Soil class
- M–H
- Median house price
- $2.5M–$6M
- Home era
- 1900s–1940s + 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
Everything that has to be right before we touch the ground. Walk through your Drummoyne home with our designer and structural engineer. We measure, photograph, and check the bones — footings, frame condition, roof structure. The cost estimate that follows is grounded in what we found, not a generic per-m² number. Our designer works with your existing home's layout — connecting new living areas to existing rooms, matching materials and roof pitch, and maximising natural light. You approve floor plans and 3D renders before we proceed.
⏱The Drummoyne construction phase. Fixed price, programmed, supervised. Most rear extensions in Drummoyne qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through City of Canada Bay Council because of overshadowing and privacy assessments. We choose based on your design, not on what's easier to lodge. Extension built from new footings to completion — connecting structurally to your existing home. Class M–H soil design managed. Temporary weatherproofing maintains liveability where possible.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Walk through the completed extension, confirm finishes, collect your OC. Six-year structural warranty covers all new work including the junction with your existing home. Maintenance guide provided.
⏱Quality Promise
We extend Drummoyne homes with a structural engineer on every job. Second storey, rear addition, multi-room — engineered and priced upfront.
Cost Guide
| Item | Estimated Range |
|---|---|
| Small rear extension (up to 30m²) | $101,000 – $200,000 |
| Medium rear/side extension (30–60m²) | $200,000 – $360,000 |
| Large ground-floor extension (60–100m²) | $360,000 – $560,000 |
| Second-storey addition (60–120m²) | $310,000 – $620,000 |
| Wrap-around (ground + 1st floor) | $560,000+ |
| Structural engineering & tie-in | Included |
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
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
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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Drummoyne 2047. City of Canada Bay Council regulations and local controls are covered on each page.