Licensed Knockdown Rebuild Builder North Rocks
NSW licensed KDR specialist in North Rocks 2151. Asbestos-accredited demolition, Class M engineered slab, BASIX 2025, 6-year structural warranty on the new home.
HIA Member
MBA NSW0476 300 300Quick Answer
A knockdown rebuild in North Rocks costs $450,000–$1,200,000+. Standard single-storey from $450K, two-storey from $650K. Buildana manages demolition, The Hills Shire Council approvals, and construction under one fixed-price contract.
Demolish and Rebuild in North Rocks
A knockdown rebuild in North Rocks is a clean, strong play on the 1960s to 1980s brick stock that has aged past renovating. The homes sit on generous 600 to 900m² R2 blocks in an established south-Hills suburb adjacent to Parramatta, so a rebuild gives you a large modern custom home. This is already a strong knockdown rebuild and duplex market.
The Wianamatta Shale ground is reactive Class M to H, so the new slab is engineered off geotech. Where the older home carries asbestos in eaves or additions, a licensed strip-out and clearance certificate lead the demolition. The larger blocks can suit a duplex where the numbers favour it.
What I check first on your North Rocks knockdown rebuild: whether a single home or a duplex suits the block, any asbestos in the demolition, and the reactive clay for the new slab. Those decide the play.
We rebuild fixed-price, licence HBL 487805C. Get our knockdown rebuild feasibility before you commit.
Buildana manages the complete knockdown rebuild process in North Rocks — 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 Rocks from $450K
- The Hills Shire Council DA and CDC approvals managed
- Demolition and asbestos removal included
- M — engineered slab design included
- Typical blocks 600–900m² in North Rocks
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near Bus to Carlingford T2 / Parramatta (4 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Rebuild or duplex on a generous block
North Rocks' 1960s to 1980s brick homes on generous 600 to 900m² blocks have largely aged past renovating, and a knockdown rebuild gives you a large modern custom home in an established south-Hills suburb adjacent to Parramatta with good schools. On the larger blocks, a duplex can be the better play where the numbers favour it, so I run both first.
This is already a strong rebuild and duplex market, which tells you the blocks and the numbers work. It resets a tired home entirely rather than renovating around aged bones.
Reactive clay and asbestos
The reactive shale under North Rocks means the new slab is engineered off a real geotech to stay stable against clay movement. Where the older home carries asbestos in eaves or additions, a licensed strip-out and clearance certificate lead the demolition before the rebuild. I map both as part of the feasibility.
Knockdown-rebuild builder in North Rocks — key facts
- Suburb
- North Rocks, NSW 2151
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 600–900m²
- Soil class
- M
- Median house price
- $1.6M–$2.3M
- Home era
- 1960s–1980s
- 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 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 North Rocks 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 North Rocks block. OC issued, all services live, 6-year structural warranty, appliance manuals, and maintenance schedule. Move in.
⏱Quality Promise
Buildana handles North Rocks KDR end-to-end — old house out, new house in, one contract, one contractor, one defined timeline.
Cost Guide
| Item | Estimated Range |
|---|---|
| Entry-level single storey KDR | $480,000 – $650,000 |
| Mid-range double storey KDR | $720,000 – $1,000,000 |
| Architectural KDR | $1,000,000 – $1,500,000 |
| Luxury KDR (high-spec finishes) | $1,500,000+ |
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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