Knockdown Rebuild Mosman — Demo to Handover in 12 Months
Mosman 2088 KDR with tight programme: demolition (3–4 weeks), new home (24–40 weeks). CDC fast-track or Mosman Council DA. Weekly progress updates.
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MBA NSW0476 300 300Quick Answer
A knockdown rebuild in Mosman costs $450,000–$1,200,000+. Standard single-storey from $450K, two-storey from $650K. Buildana manages demolition, Mosman Council approvals, and construction under one fixed-price contract.
New Home on Your Mosman Block
A knockdown rebuild in Mosman is a premium harbourside project in the cultural heart of the lower North Shore — Federation mansions, inter-war homes and harbourside contemporary builds on 500 to 1,000m² blocks. At Mosman values, the first question on many blocks is whether to rebuild or restore, and I will give you an honest read.
Heritage Conservation Areas cover virtually all the older streets, so a rebuild generally goes down the DA path with a sympathetic design, and on a well-kept heritage mansion a restoration often preserves value better than a knockdown. The substantial harbour fall on the Mosman Bay and Sirius Cove streets means suspended slabs, retaining and rock excavation on those blocks.
The ground is sandstone-dominant, so rock features on the substructure, priced from a real geotech. The pre-war 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 or restore — before you commit.
Buildana manages the complete knockdown rebuild process in Mosman — 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 Mosman from $450K
- Mosman Council DA and CDC approvals managed
- Demolition and asbestos removal included
- M — engineered slab design included
- Typical blocks 500–1,000m² in Mosman
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near North Sydney (4 km, ferry from Mosman Bay) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Premium heritage, restore-or-rebuild
Mosman is the cultural heart of the lower North Shore — Military Road village, premium harbourside heritage, Federation mansions on 500 to 1,000m² blocks. Heritage Conservation Areas cover virtually all the older streets, so a rebuild generally goes down the DA path with a sympathetic design.
At these values, on a well-kept heritage mansion, a restoration often preserves value better than a knockdown. I give you an honest read on which your block suits.
Harbour fall and sandstone rock
The substantial harbour fall on the Mosman Bay and Sirius Cove streets means suspended slabs, retaining and rock excavation on those blocks. The sandstone-dominant ground means rock features on the substructure generally, priced from a real geotech.
The pre-war stock can carry asbestos and lead paint, so a licensed strip-out leads the demolition.
Knockdown-rebuild builder in Mosman — key facts
- Suburb
- Mosman, NSW 2088
- Council / LGA
- Mosman Council (Mosman)
- Primary zoning
- R2 Low Density
- Typical lot size
- 500–1,000m²
- Soil class
- M
- Median house price
- $4.5M–$8.0M
- Home era
- 1880s–1940s heritage
- 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 |
|---|---|
| Single storey rebuild (150–200m²) | $630,000 – $900,000 |
| Double storey rebuild (200–300m²) | $900,000 – $1,390,000 |
| Premium rebuild (300m²+) | $1,390,000+ |
| Demolition (1880s–1940s heritage Mosman home) | $24,000 – $53,000 |
| Asbestos removal (if present) | $11,000 – $33,000 |
| Service disconnections & reinstatement | $4,000 – $11,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. 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 Mosman market data — not generic Sydney averages. New home designed for your Mosman block — maximising FSR, orientation, and streetscape. Working drawings, engineering, and BASIX prepared. CDC or DA lodged with Mosman Council.
⏱The Mosman construction phase. Fixed price, programmed, supervised. Full demolition management: asbestos survey report, licensed removal where required, structural demolition, site clearing, temporary fencing, and dust/noise management. Mosman 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.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Defect-free handover inspection, OC issued, keys in hand. Permanent services reconnected, landscaping complete, 6-year structural warranty, and full maintenance guide provided.
⏱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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