Knockdown Rebuild Wahroonga — From $450K All-In
Fixed-price knockdown rebuild in Wahroonga 2076. Demolition, new home, all Ku-ring-gai Council approvals under one contract. No surprises, no variation trail.
HIA Member
MBA NSW0476 300 300Knockdown Rebuild Builder in Wahroonga
A knockdown rebuild in Wahroonga is a premium upper North Shore project in one of Sydney's strongest school catchments — Knox Grammar, the surrounding private schools, and the San hospital precinct all frame the suburb. On 800 to 1,500m² blocks holding 1920s to 1960s heritage stock, a quality rebuild sits in genuine demand.
The heritage Federation streetscapes east of the Pacific Highway carry real controls, so the first question on many blocks is whether to rebuild or restore. On a well-kept character home in the catchment, a sympathetic restoration often preserves value better than a knockdown, and I will tell you so honestly.
The ground is Class M, taking a standard engineered slab off a geotech. The pre-war stock almost always carries asbestos and can carry lead paint, so a licensed strip-out leads the demolition. On the western edge, the hospital precinct adds some zoning complexity worth checking.
We rebuild fixed-price, licence HBL 487805C. Get our feasibility — rebuild or restore — before you commit.
Buildana manages the complete knockdown rebuild process in Wahroonga — 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 Wahroonga from $450K
- Ku-ring-gai Council DA and CDC approvals managed
- Demolition and asbestos removal included
- Class M soil — engineered slab design included
- Typical blocks 800–1,500m² in Wahroonga
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near Wahroonga station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
A catchment worth building in
Wahroonga's school catchment — Knox Grammar and the surrounding private schools — is one of the strongest in Sydney, and it draws families who want to build and stay. On 800 to 1,500m² blocks with a station putting the city around 32 minutes away, a quality rebuild holds real value.
It is a premium single-home suburb where the build needs to match the address.
Heritage, restore-or-rebuild, and old stock
The heritage Federation streetscapes east of the Pacific Highway carry controls, and on a well-kept character home a sympathetic restoration often preserves value better than a knockdown. I give you a straight read on which your block suits.
The Class M ground takes a standard engineered slab off a geotech. The pre-war stock almost always carries asbestos and can carry lead paint, so a licensed strip-out leads any demolition. On the western edge, the hospital precinct adds zoning complexity worth checking.
Knockdown-rebuild builder in Wahroonga — key facts
- Suburb
- Wahroonga, NSW 2076
- Council / LGA
- Ku-ring-gai Council (Ku-ring-gai)
- Primary zoning
- R2 Low Density
- Typical lot size
- 800–1,500m²
- Soil class
- Class M
- Median house price
- $3.0M–$4.6M
- Home era
- 1920s–1960s
- 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
Every Buildana knockdown rebuild in Wahroonga is delivered under a fixed-price contract — site assessment through to defect-free handover.
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 M 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 Wahroonga 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 M soil) to keys — fixed-price, milestone-based progress payments. Your project manager provides weekly updates.
⏱Walk through your finished home on your original Wahroonga block. OC issued, all services live, 6-year structural warranty, appliance manuals, and maintenance schedule.
⏱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
We Build Across Sydney
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
Wahroonga KDR — Start Here
Free KDR site assessment for Wahroonga 2076. We'll assess your block, estimate cost, and provide a fixed-price budget.
Start Your ProjectMore in Wahroonga
Other Buildana services in Wahroonga
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Wahroonga 2076. Ku-ring-gai Council regulations and local controls are covered on each page.