Knockdown Rebuild North Narrabeen — From $450K All-In
Fixed-price knockdown rebuild in North Narrabeen 2101. Demolition, new home, all Northern Beaches Council approvals under one contract. No surprises, no variation trail.
HIA Member
MBA NSW0476 300 300North Narrabeen KDR — Single Contract, New Home
A knockdown rebuild in North Narrabeen suits the tired post-war stock on this oceanfront and lagoon-fringe suburb, but the coastal overlays and lagoon soils shape any rebuild. The homes sit on 450 to 800m² blocks, and the direct beachfront sits in a Coastal Hazard zone while the lagoon-edge lots carry coastal acid sulfate soils. The Federation beach houses on some streets carry character worth checking.
The Hawkesbury Sandstone means rock excavation is common on the new slab, the lagoon-edge lots carry Narrabeen Lagoon coastal acid sulfate soils requiring specific management, and coastal-facing rebuilds carry salt-grade specs. Where the older home carries asbestos, a licensed strip-out and clearance certificate lead the demolition.
What I check first on your North Narrabeen knockdown rebuild: whether you sit in a Coastal Hazard zone or on lagoon-edge acid sulfate soils, the depth to rock, and asbestos in the demolition. Those decide the play and the price.
We rebuild fixed-price, licence HBL 487805C. Get our knockdown rebuild feasibility before you commit.
Buildana manages the complete knockdown rebuild process in North Narrabeen — from site assessment and architectural design through to DA or CDC approval, demolition management, and fixed-price construction to handover. One builder, one contract, one new home.
Read our KDR Cost Guide 2026 or use the Renovation vs KDR Calculator to compare options.
- New home in North Narrabeen from $450K
- Northern Beaches Council DA and CDC approvals managed
- Demolition and asbestos removal included
- Hawkesbury Sandstone — engineered slab design included
- Typical blocks 450–800m² in North Narrabeen
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — 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
Coastal and lagoon overlays shape the rebuild
North Narrabeen sits between the ocean and Narrabeen Lagoon, and those two edges shape any knockdown rebuild. The direct beachfront sits in a Coastal Hazard zone with erosion and inundation design requirements, and the lagoon-edge lots carry coastal acid sulfate soils that need specific management on excavation and footings. Any builder who quotes without mapping these is guessing.
Some Federation beach houses on the older streets carry character worth checking before demolition. Where a rebuild does stack up, the beach-and-lagoon setting gives a new home a genuinely desirable location.
Acid sulfate soils, rock and salt
The Narrabeen Lagoon coastal acid sulfate soils on lagoon-edge lots require specific management, because disturbing them without treatment causes real problems, so they get assessed and managed properly. The Hawkesbury Sandstone brings rock excavation on the new slab, and coastal-facing rebuilds carry salt-grade specs. Where the older home carries asbestos, a licensed strip-out and clearance certificate lead the demolition. I price all of it from real assessments.
Knockdown-rebuild 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
- $450,000 – $1,200,000+
- Typical timeline
- 14–22 months including demolition
- Approval pathway
- CDC where eligible or DA for complex sites
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 knockdown rebuild done cleanly: licensed demolition, compliant slab, new home built to NCC 2025. Fixed-price contract.
How It Works
From First Call to Final Key
Site visit covers everything that affects the build cost: vehicle access for trucks and crane, services (sewer depth, water connection, electrical service rating), soil exposure for borehole, neighbouring construction, and any obvious heritage or tree constraints. Real numbers, not estimates.
⏱Architectural design for your replacement home, structural engineering for Class Hawkesbury Sandstone soil, BASIX certification, and all approval documentation. Lodged as CDC (10–15 days) or DA (40–90 days) depending on design.
⏱Demolition runs 5–10 working days for a standard North Narrabeen cottage — longer if asbestos volume is significant or the structure includes a brick chimney or solid-block walls. Asbestos work happens first under a controlled removal program before mechanical demo starts.
⏱New home built from engineered slab (Class Hawkesbury Sandstone soil) to keys — fixed-price, milestone-based progress payments. Your project manager provides weekly updates.
⏱Walk through your finished home on your original North Narrabeen block. OC issued, all services live, 6-year structural warranty, appliance manuals, and maintenance schedule. Move in.
⏱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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