Knockdown Rebuild Allambie Heights — From $450K All-In
Fixed-price knockdown rebuild in Allambie Heights 2100. 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 Allambie Heights 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.
Allambie Heights Knockdown Rebuilds
A knockdown rebuild in Allambie Heights is a Northern Beaches project with the classic Beaches drivers — 1960s to 1980s brick on 600 to 900m² blocks with substantial sandstone topography, elevated above Manly Vale with the hospital close. The premium replacement market here is already active.
The sandstone does the heavy lifting on cost: rock excavation typically runs $40,000 to $120,000 on these lots, priced from a real geotech bore. On the perimeter lots backing Manly Dam Reserve and Garigal, BAL-12.5 to BAL-29 bushfire ratings shape the design.
The older homes can carry asbestos, so a licensed strip-out leads the demolition. The Northern Beaches Hospital proximity keeps demand strong, including from medical staff.
We rebuild fixed-price, licence HBL 487805C. Get our feasibility, with the rock and bushfire costed, before you commit.
Buildana manages the complete knockdown rebuild process in Allambie Heights — 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 Allambie Heights from $450K
- Northern Beaches Council DA and CDC approvals managed
- Demolition and asbestos removal included
- Hawkesbury Sandstone — engineered slab design included
- Typical blocks 600–900m² in Allambie Heights
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near B-Line bus to CBD via Mosman / Brookvale (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Elevated blocks, active replacement market
Allambie Heights' 600 to 900m² blocks, elevated position and hospital proximity have made the premium replacement market here genuinely active — the 1960s-80s brick is steadily giving way to modern homes. A rebuild fits exactly where the suburb is heading.
The elevation rewards a two-storey design that captures the outlook.
Rock and bushfire drive the cost
The Hawkesbury Sandstone means rock excavation typically runs $40,000 to $120,000 on these lots, priced from a real geotech bore so it is in the fixed price. On the perimeter lots backing Manly Dam Reserve and Garigal, BAL-12.5 to BAL-29 ratings shape the design.
The older homes can carry asbestos, so a licensed strip-out leads the demolition.
Knockdown-rebuild builder in Allambie Heights — key facts
- Suburb
- Allambie Heights, NSW 2100
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 600–900m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.4M–$3.6M
- Home era
- 1960s–1980s + 2010s+ premium replacements
- 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
Free site inspection of your Allambie Heights property. We check lot dimensions, Northern Beaches Council's planning controls, existing home condition, and potential asbestos. Written assessment with budget estimate within 5 business days.
⏱KDR is the chance to get the design right — the new build doesn't have to mimic the original layout. We start from your block's strengths (orientation, slope, views) and your family's brief, then design the home the original lot always deserved.
⏱Licensed demolition of existing 1960s–1980s + 2010s+ premium replacements-era dwelling. Asbestos removal by certified contractors (if present). Site cleared, levelled, and ready for new slab. Typically 1–2 weeks.
⏱Your new home goes up on the cleared site. Engineered slab sized for Class Hawkesbury Sandstone soil, frame, roof, fit-out, kitchen, bathrooms, flooring, painting, driveway, and landscaping. Quality inspections at every stage.
⏱Handover pack: OC, structural certificates, BASIX, appliance manuals and warranties, paint colour schedule, maintenance plan, and the keys. Six-year structural warranty kicks in from OC date — keep the documentation safe for any future sale.
⏱Quality Promise
Allambie Heights 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 | $530,000 – $720,000 |
| Mid-range double storey KDR | $790,000 – $1,100,000 |
| Architectural KDR | $1,100,000 – $1,650,000 |
| Luxury KDR (high-spec finishes) | $1,650,000+ |
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
Explore Related Topics
Book a Allambie Heights Knockdown Rebuild Assessment
Free KDR site assessment for Allambie Heights 2100. We'll assess your block, estimate cost, and provide a fixed-price budget.
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Other Buildana services in Allambie Heights
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Allambie Heights 2100. Northern Beaches Council regulations and local controls are covered on each page.