Knockdown Rebuild Baulkham Hills — Demo to Handover in 12 Months
Baulkham Hills 2153 KDR with tight programme: demolition (3–4 weeks), new home (24–40 weeks). CDC fast-track or The Hills Shire Council DA. Weekly progress updates.
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MBA NSW0476 300 300Quick Answer
A knockdown rebuild in Baulkham Hills 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.
New Home on Your Baulkham Hills Block
A knockdown rebuild in Baulkham Hills is one of the Hills District's strongest plays — 1970s to 1990s brick on generous 600 to 900m² R2 lots, established schools and shopping, and a strong duplex and granny flat market already running. The aging stock and generous blocks give a rebuild real potential.
Against the Hills' 600m² duplex minimum (700m² preferred), most Baulkham Hills blocks qualify, so I run the duplex numbers alongside the single rebuild as standard. The R3 around Old Northern Road opens medium-density on some blocks.
The ground is Wianamatta Shale, so the slab is designed off a real geotech. On the older 1970s homes there can be asbestos, needing a licensed strip-out; the newer stock is usually clear.
We rebuild fixed-price, licence HBL 487805C. Get our feasibility — rebuild or duplex — before you commit.
Buildana manages the complete knockdown rebuild process in Baulkham Hills — 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 Baulkham Hills 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 Baulkham Hills
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near Bus to Castle Hill Metro (3 km) / T-Way station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The Hills' established heartland
Baulkham Hills' 600 to 900m² blocks, established schools and shopping, and aging 1970s-90s brick stock make it one of the strongest rebuild suburbs in the Hills. A knockdown resets a dated home into a modern one in a suburb families already want.
The duplex and granny flat market here is active, and most blocks clear the 600m² minimum, so I run those numbers as standard.
Shale and era-dependent demolition
The Wianamatta Shale takes a slab designed off a real geotech. The demolition depends on the era: 1970s homes can carry asbestos and need a licensed strip-out, while the newer stock is usually clear.
On the R3 around Old Northern Road, medium-density can be worth costing where a block qualifies.
Knockdown-rebuild builder in Baulkham Hills — key facts
- Suburb
- Baulkham Hills, NSW 2153
- 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–$2.4M
- Home era
- 1970s–1990s
- 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 1970s–1990s fibro → modern brick double storey | $520,000 – $1,000,000 |
| Demolish brick veneer → new brick veneer (like-for-like uplift) | $480,000 – $850,000 |
| Demolish to downsize (smaller footprint) | $460,000 – $720,000 |
| Demolish to upsize (growing family) | $700,000 – $1,200,000 |
| Demolish older home, rebuild investment-grade | $560,000 – $900,000 |
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 Baulkham Hills block — lot size (typical 600–900m²), R2 Low 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 The Hills Shire 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
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