Knockdown Rebuild Davidson — One Contract, Demo to Keys
Everything under one agreement in Davidson 2085: demolition, asbestos removal, site prep, design, approvals, engineering, new home construction, landscaping and Occupation Certificate.
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MBA NSW0476 300 300Quick Answer
A knockdown rebuild in Davidson 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.
Davidson Knockdown Rebuilds
A knockdown rebuild in Davidson is a bushland-edge project — 1960s to 1980s brick and contemporary on 600 to 1,000m² blocks backing Garigal National Park. The generous blocks suit a substantial rebuild, with bushfire the defining design factor.
BAL-19 to Flame Zone applies on most lots, so the RFS Bushfire Protection Assessment is standard and the design meets its rating. The sandstone means deep rock excavation of $50,000 to $130,000 is typical, priced from a geotech bore.
The older homes can carry asbestos, so a licensed strip-out leads the demolition.
We rebuild fixed-price, licence HBL 487805C. Get our feasibility, with the bushfire and rock costed, before you commit.
Buildana manages the complete knockdown rebuild process in Davidson — 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 Davidson from $450K
- Northern Beaches Council DA and CDC approvals managed
- Demolition and asbestos removal included
- Hawkesbury Sandstone — engineered slab design included
- Typical blocks 600–1,000m² in Davidson
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near B-Line bus to CBD (Frenchs Forest interchange) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Bushfire is the defining factor
Davidson backs Garigal National Park, so BAL-19 to Flame Zone ratings apply on most lots and the RFS Bushfire Protection Assessment is standard. The design meets its rating — materials, glazing, screening — designed in from the start.
On 600 to 1,000m² blocks, the bushfire-compliant design has room to work, and the quiet bush setting rewards it.
Deep rock, priced from the bore
The sandstone means deep rock excavation of $50,000 to $130,000 is typical, priced from a real geotech bore so it is in the fixed price.
The older homes can carry asbestos, so a licensed strip-out leads the demolition.
Knockdown-rebuild builder in Davidson — key facts
- Suburb
- Davidson, NSW 2085
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 600–1,000m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.4M–$3.6M
- Home era
- 1960s–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.
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 Davidson 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 Davidson block. OC issued, all services live, 6-year structural warranty, appliance manuals, and maintenance schedule. Move in.
⏱Quality Promise
Davidson knockdown rebuild done cleanly: licensed demolition, compliant slab, new home built to NCC 2025. Fixed-price contract.
Cost Guide
| Item | Estimated Range |
|---|---|
| Entry-level single storey KDR | $540,000 – $730,000 |
| Mid-range double storey KDR | $810,000 – $1,130,000 |
| Architectural KDR | $1,130,000 – $1,690,000 |
| Luxury KDR (high-spec finishes) | $1,690,000+ |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
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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