Home Extension Builder North Narrabeen — From $150K Fixed Price
Fixed-price home extensions in North Narrabeen 2101. Rear extension $150K–$300K, second storey $300K–$500K. Northern Beaches Council approvals managed. Free site consult.
HIA Member
MBA NSW0476 300 300North Narrabeen Home Extensions & Additions
The rockpool end of the peninsula has a specific extension problem: ground you can't casually dig. North Narrabeen's lagoon-fringe lots carry coastal acid sulphate soils that turn a simple slab excavation into a managed process, and the direct beachfront sits inside the coastal hazard zone. For a home extension on those streets, the path of least resistance — and often best value — runs upward, not outward.
A first-floor addition on the suburb's 1920s–1960s beach houses trades yard disruption for ocean and lagoon views, and the early brick stock carries the load well once checked. Streets back from the water on stable sandstone extend in either direction, with rock in the dig priced by test hole. At $2.6M–$5M+ this is a market worth building into rather than out of. Have us walk your block before you commit.
Buildana manages the complete home extension process in North Narrabeen — 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 North Narrabeen from $150K
- Northern Beaches Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone — structural engineering included
- 1920s–1960s + premium contemporary-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 (Narrabeen interchange) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The ground votes up
North Narrabeen's lagoon-fringe acid sulphate soils turn simple slabs into managed processes, and the beachfront sits in the hazard zone — so the best-value path on those streets runs upward.
The first floor trades yard disruption for ocean and lagoon views the originals never claimed.
Back streets extend freely
Off the water on stable sandstone, both directions work — with rock in the dig priced by test hole rather than guessed.
The early brick carries the upper level well once checked. All priced upfront.
Home extension builder in North Narrabeen — key facts
- Suburb
- North Narrabeen, NSW 2101
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 450–800m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.6M–$5M+ (oceanfront)
- Home era
- 1920s–1960s + premium contemporary
- 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
North Narrabeen 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
The first job on an extension is finding out what you're extending onto. North Narrabeen homes from the 1920s–1960s + premium contemporary 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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Last updated: 1 April 2026
Explore Related Topics
Extend Your Home in North Narrabeen
Free design consultation for North Narrabeen 2101. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in North Narrabeen
Other Buildana services in North Narrabeen
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in North Narrabeen 2101. Northern Beaches Council regulations and local controls are covered on each page.