Home Extension Cromer — Design, Approval, Structural, Build
Full-service extensions in Cromer 2099: structural survey of existing 1960s–1980s home, design, Northern Beaches Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
HIA Member
MBA NSW0476 300 300Extending Homes in Cromer
A home extension in Cromer grows the family brick home — 1960s-1980s stock on 550 to 800m² blocks where the wing adds the living the originals rationed and the lagoon-valley setting stays.
The era fabric gets licensed handling, the junctions are engineered, and the golf-course green belt keeps the streets settled.
At the $2.0M to $2.8M median, the wing beats the friction of upsizing on the beaches.
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 Cromer — 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 Cromer from $150K
- Northern Beaches Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone — structural engineering included
- 1960s–1980s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near B-Line bus to CBD (Brookvale interchange) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The family suburb's wing
Cromer's brick homes take the rear wing confidently — second living, bedrooms, an opened kitchen — on blocks with genuine room and a green-belt setting worth staying for.
The beaches' upsizing friction makes the maths straightforward.
Era and edges handled
Asbestos gets the licensed strip-out where the era fabric is disturbed, and the lagoon-side lows get the drainage check.
Both sit in the quote up front, not tacked on as the work opens up.
Home extension builder in Cromer — key facts
- Suburb
- Cromer, NSW 2099
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 550–800m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.0M–$2.8M
- Home era
- 1960s–1980s
- 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 Cromer 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. Cromer homes from the 1960s–1980s 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
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Free design consultation for Cromer 2099. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Cromer
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Cromer 2099. Northern Beaches Council regulations and local controls are covered on each page.