Mascot Knockdown Rebuild — Stay on Your Street
Buildana handles KDR across Mascot 2020. 1940s–1970s + apartment towers homes on 300–600m² blocks — we know the soil, the Bayside Council rules, and the neighbours' expectations.
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MBA NSW0476 300 300Quick Answer
A knockdown rebuild in Mascot costs $450,000–$1,200,000+. Standard single-storey from $450K, two-storey from $650K. Buildana manages demolition, Bayside Council approvals, and construction under one fixed-price contract.
Mascot Knockdown Rebuilds
A knockdown rebuild in Mascot is usually the wrong product, because this is apartment-tower and R4 redevelopment territory next to the airport. The post-war stock sits among former industrial conversions and high-rise towers, and R4 zoning around the station makes a density redevelopment the dominant play. On the rare standard residential block, a rebuild runs into the sandy ground, contamination and severe flight path.
The Botany Sands ground can carry an elevated water table, some parcels carry industrial-legacy contamination, and the ANEF flight-path overlays are severe, bringing significant acoustic requirements. Where the older home carries asbestos, a licensed strip-out and clearance certificate lead the demolition.
What I check first on your Mascot knockdown rebuild: whether R4 zoning makes redevelopment the play, the sandy ground and any contamination, and the severe flight-path acoustics. 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 Mascot — 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 Mascot from $450K
- Bayside Council DA and CDC approvals managed
- Demolition and asbestos removal included
- M — engineered slab design included
- Typical blocks 300–600m² in Mascot
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near Mascot (T8, in suburb) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
R4 density usually beats a single rebuild
Mascot is a major commercial precinct next to the airport, dominated by apartment towers and R4 redevelopment around the station. On most parcels, a density redevelopment far outperforms a single knockdown rebuild, so building one house rarely makes sense. If your block sits in that R4 zone, the honest advice is to look at the redevelopment yield.
The rebuild conversation only really applies on the rare standard residential block away from the redevelopment core, and even there the ground and the flight path make it a considered job.
Sandy ground, contamination and flight path
Where a rebuild does apply, three things shape it. The Botany Sands ground can carry an elevated water table, so any new slab is engineered against groundwater. Some parcels near the former industrial land carry contamination worth checking from a site history. And the severe ANEF flight-path overlays bring significant acoustic construction requirements. Where the older home carries asbestos, a licensed strip-out and clearance certificate lead the demolition. I map all of it first.
Knockdown-rebuild builder in Mascot — key facts
- Suburb
- Mascot, NSW 2020
- Council / LGA
- Bayside Council (Bayside)
- Primary zoning
- R2 Low
- Typical lot size
- 300–600m²
- Soil class
- M
- Median house price
- $1.5M–$2.3M
- Home era
- 1940s–1970s + apartment towers
- 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) | $470,000 – $660,000 |
| Double storey rebuild (200–300m²) | $660,000 – $1,020,000 |
| Premium rebuild (300m²+) | $1,020,000+ |
| Demolition (1940s–1970s + apartment towers Mascot home) | $17,000 – $39,000 |
| Asbestos removal (if present) | $8,000 – $24,000 |
| Service disconnections & reinstatement | $3,000 – $8,000 |
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. 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.
⏱The Mascot construction phase. Fixed price, programmed, supervised. Demolition runs 5–10 working days for a standard Mascot 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.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Walk through your finished home on your original Mascot block. OC issued, all services live, 6-year structural warranty, appliance manuals, and maintenance schedule. Move in.
⏱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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Last updated: 1 April 2026
Knockdown Rebuild in Mascot
Free KDR site assessment for Mascot 2020. We'll assess your block, estimate cost, and provide a fixed-price budget.
Start Your ProjectMore in Mascot
Other Buildana services in Mascot
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Mascot 2020. Bayside Council regulations and local controls are covered on each page.