Knockdown Rebuild North Balgowlah — From $450K All-In
Fixed-price knockdown rebuild in North Balgowlah 2093. Demolition, new home, all Northern Beaches Council approvals under one contract. No surprises, no variation trail.
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MBA NSW0476 300 300Quick Answer
A knockdown rebuild in North Balgowlah costs $450,000–$1,200,000+. Standard single-storey from $450K, two-storey from $650K. Buildana manages demolition, Northern Beaches Council approvals, and construction under one fixed-price contract.
New Home on Your North Balgowlah Block
North Balgowlah quietly runs one of the strongest knockdown rebuild and duplex markets on the lower Northern Beaches. The stock is 1950s to 1980s brick on 500 to 800m² R2 blocks, the streets are quiet, and Stockland Balgowlah is minutes away, families rebuild here to stay in the pocket, not to leave it. Medians of $2.6M to $3.8M make an original brick house the cheapest part of the asset.
Sandstone topography means rock excavation typically between $40K and $100K, which the geotech pins down before contract. Duplex minimums on the Beaches vary by legacy council area, 600m² or 700m² depending on your precinct, so dual-occupancy feasibility needs a proper LEP check, not a guess. Both paths work on the right block.
What I would check first on a North Balgowlah block: the sandstone rock cost from a geotech, the land value against the old brick house, and whether your precinct wants 600m² or 700m² for a duplex. Those set the path.
We build these fixed-price, licence HBL 487805C. Bring us your address and we will tell you which one your land supports.
Buildana manages the complete knockdown rebuild process in North Balgowlah — 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 Balgowlah from $450K
- Northern Beaches Council DA and CDC approvals managed
- Demolition and asbestos removal included
- Hawkesbury Sandstone — engineered slab design included
- Typical blocks 500–800m² in North Balgowlah
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near B-Line bus to CBD via Mosman station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Rebuild to stay in the pocket
North Balgowlah quietly runs one of the strongest KDR and duplex markets on the lower Northern Beaches. The stock is 1950s to 1980s brick on 500 to 800m² R2 blocks, the streets are quiet, and Stockland Balgowlah is minutes away.
Families rebuild here to stay in the pocket, not to leave it, and medians of $2.6M to $3.8M make an original brick house the cheapest part of the asset.
Rock, and the duplex question
Sandstone topography means rock excavation typically between $40K and $100K, which the geotech pins down before contract.
Duplex minimums on the Beaches vary by legacy council area, 600m² or 700m² depending on your precinct, so dual-occupancy feasibility needs a proper LEP check, not a guess. Both paths work on the right block. Bring us your address.
Knockdown-rebuild builder in North Balgowlah — key facts
- Suburb
- North Balgowlah, NSW 2093
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 500–800m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.6M–$3.8M
- Home era
- 1950s–1980s + 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.
Cost Guide
| Item | Estimated Range |
|---|---|
| Single storey rebuild (150–200m²) | $550,000 – $780,000 |
| Double storey rebuild (200–300m²) | $780,000 – $1,210,000 |
| Premium rebuild (300m²+) | $1,210,000+ |
| Demolition (1950s–1980s + premium contemporary North Balgowlah home) | $21,000 – $46,000 |
| Asbestos removal (if present) | $9,000 – $29,000 |
| Service disconnections & reinstatement | $3,000 – $9,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. 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.
⏱The North Balgowlah construction phase. Fixed price, programmed, supervised. Demolition runs 5–10 working days for a standard North Balgowlah 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.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Walk through your finished home on your original North Balgowlah 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
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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
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