Knockdown Rebuild Seven Hills — From $450K All-In
Fixed-price knockdown rebuild in Seven Hills 2147. Demolition, new home, all Blacktown City Council approvals under one contract. No surprises, no variation trail.
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MBA NSW0476 300 300Quick Answer
A knockdown rebuild in Seven Hills costs $450,000–$1,200,000+. Standard single-storey from $450K, two-storey from $650K. Buildana manages demolition, Blacktown City Council approvals, and construction under one fixed-price contract.
Seven Hills Knockdown Rebuilds
A knockdown rebuild in Seven Hills is a sound play on the 1960s to 1980s stock, on generous 550 to 700m² R2 blocks close to the station and the M2 and M7 motorways. Many of these homes are ready for renewal, so a rebuild gives you a modern family home in a well-linked pocket.
The main technical driver here is the Class H reactive clay, which moves with moisture and needs a properly engineered slab. The new home sits on a stiffened raft designed off a real geotech, not an assumed footing — that is the detail that matters most on a Seven Hills rebuild.
The older homes can carry asbestos, so a licensed strip-out and clearance certificate lead the demolition where needed. Seven Hills is R2, so this is a single-home rebuild suburb rather than a duplex one.
We rebuild fixed-price, licence HBL 487805C. Get our knockdown rebuild feasibility, with the slab designed off geotech, before you commit.
Buildana manages the complete knockdown rebuild process in Seven 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 Seven Hills from $450K
- Blacktown City Council DA and CDC approvals managed
- Demolition and asbestos removal included
- Class H soil — engineered slab design included
- Typical blocks 550–700m² in Seven Hills
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near Seven Hills station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Well-linked family blocks
Seven Hills' 550 to 700m² blocks and its position near the station and the M2 and M7 make it a practical rebuild suburb for families. Much of the 1960s to 1980s stock is ready for renewal, so a knockdown rebuild resets a dated home into a modern one without leaving the area.
It is a settled, family-friendly pocket, so a well-planned rebuild that uses the block properly holds up well.
Reactive clay drives the slab
The Class H reactive clay under Seven Hills expands and contracts with moisture, so the new home needs a stiffened raft engineered off a real geotech. Skimp on the slab and reactive clay will find the weakness — it is exactly where cheap builders cut.
The older homes can carry asbestos, so a licensed strip-out and clearance certificate lead the demolition where needed. I price both the slab and the strip-out into the feasibility.
Knockdown-rebuild builder in Seven Hills — key facts
- Suburb
- Seven Hills, NSW 2147
- Council / LGA
- Blacktown City Council (Blacktown City)
- Primary zoning
- R2 Low Density
- Typical lot size
- 550–700m²
- Soil class
- Class H
- Median house price
- $900K–$1.15M
- 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
KDR feasibility is two questions: what can the block legally support, and is it cheaper to build new than fix old. We answer both in writing within a week, with cost ranges grounded in current Seven Hills market data — not generic Sydney averages.
⏱New home designed for your Seven Hills block — maximising FSR, orientation, and streetscape. Working drawings, engineering, and BASIX prepared. CDC or DA lodged with Blacktown City Council.
⏱Full demolition management: asbestos survey report, licensed removal where required, structural demolition, site clearing, temporary fencing, and dust/noise management. Blacktown City Council demolition permit obtained beforehand.
⏱Build sequence: site prep, slab pour, frame stand, roof, brickwork, lock-up, plumbing and electrical rough-in, plaster, internal fit-out, kitchen install, tiling, flooring, painting, external works, final clean. Each stage signed off before payment release.
⏱Defect-free handover inspection, OC issued, keys in hand. Permanent services reconnected, landscaping complete, 6-year structural warranty, and full maintenance guide provided.
⏱Quality Promise
Seven Hills KDR projects run on one contract: demolition, asbestos clearance, approvals, construction, handover. One builder accountable.
Cost Guide
| Item | Estimated Range |
|---|---|
| Entry-level single storey KDR | $450,000 – $600,000 |
| Mid-range double storey KDR | $670,000 – $930,000 |
| Architectural KDR | $930,000 – $1,400,000 |
| Luxury KDR (high-spec finishes) | $1,400,000+ |
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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