Knockdown Rebuild Chatswood — One Contract, Demo to Keys
Everything under one agreement in Chatswood 2067: demolition, asbestos removal, site prep, design, approvals, engineering, new home construction, landscaping and Occupation Certificate.
HIA Member
MBA NSW0476 300 300Quick Answer
A knockdown rebuild in Chatswood costs $450,000–$1,200,000+. Standard single-storey from $450K, two-storey from $650K. Buildana manages demolition, Willoughby City Council approvals, and construction under one fixed-price contract.
New Home on Your Chatswood Block
A knockdown rebuild in Chatswood is worth weighing carefully, because this is the commercial heart of the lower North Shore, with a major Metro and T1 interchange and strong R3 zoning along the Help Street corridor. On a lot of blocks, a duplex or townhouse build beats a single rebuild, so the higher-yield option is often the one to look at first.
The residential streets either side of the Pacific Highway run R2 and R3, with Federation and Californian Bungalow stock east of the highway and post-war on the western flats, on 500 to 800m² blocks. Where a block is R3 and clears the 650m² minimum, I show you the duplex or townhouse numbers alongside the single rebuild.
The ground is Class M on the ridges, grading Class H to E in the Middle Harbour valleys, so the slab is designed off a real geotech. The older stock can carry asbestos and lead paint, so a licensed strip-out leads the demolition.
We rebuild fixed-price, licence HBL 487805C. Get our feasibility — rebuild, duplex or townhouse — before you commit.
Buildana manages the complete knockdown rebuild process in Chatswood — 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 Chatswood from $450K
- Willoughby City Council DA and CDC approvals managed
- Demolition and asbestos removal included
- M — engineered slab design included
- Typical blocks 500–800m² in Chatswood
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near Chatswood station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Yield is the first question
Chatswood's Metro and T1 interchange and its R3 zoning along the Help Street corridor change the calculation. On a block that is R3 and clears the 650m² minimum, a duplex or townhouse build often returns more than a single rebuild, so I show you those numbers first.
A single custom home still works where that is genuinely your goal, particularly on the R2 streets, but on land zoned for more it would be a disservice not to run the yield option.
Valley soil and old stock
The ground is Class M on the ridges, grading Class H to E in the Middle Harbour valleys, so the slab is designed off a real geotech for your block. The Federation and Californian Bungalow stock east of the highway can carry asbestos and lead paint, so a licensed strip-out leads the demolition.
I price the ground and the demolition into the feasibility whichever way you build.
Knockdown-rebuild builder in Chatswood — key facts
- Suburb
- Chatswood, NSW 2067
- Council / LGA
- Willoughby City Council (Willoughby)
- Primary zoning
- R2
- Typical lot size
- 500–800m²
- Soil class
- M
- Median house price
- $2.6M–$3.8M
- Home era
- 1920s–1970s
- 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 |
|---|---|
| Demolish 1920s–1970s (Federation, inter-war, mid-century) fibro → modern brick double storey | $620,000 – $1,200,000 |
| Demolish brick veneer → new brick veneer (like-for-like uplift) | $580,000 – $1,020,000 |
| Demolish to downsize (smaller footprint) | $550,000 – $860,000 |
| Demolish to upsize (growing family) | $840,000 – $1,440,000 |
| Demolish older home, rebuild investment-grade | $670,000 – $1,080,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
We assess your Chatswood block — lot size (typical 500–800m²), R2 zoning, setbacks, FSR, and existing dwelling condition. Asbestos survey included.
⏱Complete design package: floor plans, elevations, 3D renders, structural engineering, geotech, BASIX, stormwater, and all documentation Willoughby City Council requires. Approval managed start to finish.
⏱Pre-demolition: dilapidation report on adjoining properties (protects you against unfounded damage claims), service disconnections, asbestos clearance, neighbour notification. Then 1–2 weeks of physical demolition with material sorted at site for recycling where possible.
⏱Fixed-price construction: engineered slab, frame, lock-up, fit-out, external works. 8–12 months depending on size.
⏱Same address, completely different home. Permanent gas, water, electrical, NBN reconnected and tested.
⏱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
Book a Chatswood Knockdown Rebuild Assessment
Free KDR site assessment for Chatswood 2067. We'll assess your block, estimate cost, and provide a fixed-price budget.
Start Your ProjectMore in Chatswood
Other Buildana services in Chatswood
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Chatswood 2067. Willoughby City Council regulations and local controls are covered on each page.