Home Extension South Coogee — Design, Approval, Structural, Build
Full-service extensions in South Coogee 2034: structural survey of existing 1900s–1960s home, design, Randwick City Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
HIA Member
MBA NSW0476 300 300South Coogee Home Extensions & Additions
On the clifftops of South Coogee, a home extension is really a view acquisition. The suburb's Federation and inter-war homes on 350–700m² blocks sit along an ocean ridge where one additional level captures the coastline from Lurline Bay south — and in a market running $2.8M–$6M with clifftop past $7M, that level is worth more than any room you could add at ground level.
Salt-grade specification is mandatory here, not a nice-to-have: the cliff-edge exposure destroys standard fixings and finishes within years, so marine-grade steel, coatings and sealed detailing go into everything we build this close to the water. Sandstone underneath gives additions a solid base but makes excavation a test-dig conversation. Heritage streets get front elevations reviewed. Price a view level with us and see what it returns.
Buildana manages the complete home extension process in South Coogee — 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 South Coogee from $150K
- Randwick City 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 Light Rail Randwick (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
A view acquisition, not just a room
On South Coogee's ridge, one additional level captures the coastline from Lurline Bay south — worth more than anything you could add at ground level, in a market where clifftop runs past $7M.
The heritage streets get front elevations reviewed while the set-back level moves more freely.
Marine grade, mandatory
The cliff-edge exposure destroys standard fixings within years — marine-grade steel, coatings and sealed detailing go into everything this close to the water.
The sandstone base makes excavation a test-dig conversation, priced upfront.
Home extension builder in South Coogee — key facts
- Suburb
- South Coogee, NSW 2034
- Council / LGA
- Randwick City Council (Randwick)
- Primary zoning
- R2 Low
- Typical lot size
- 350–700m²
- Soil class
- M
- Median house price
- $2.8M–$6M (clifftop $7M+)
- 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.
Quality Promise
Every Buildana home extension in South Coogee is delivered under a fixed-price contract — from design consultation through to defect-free handover.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. South Coogee homes from the 1900s–1960s 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.
⏱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
South Coogee Extension — Free Consultation
Free design consultation for South Coogee 2034. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in South Coogee
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in South Coogee 2034. Randwick City Council regulations and local controls are covered on each page.