Knockdown Rebuild Mortlake — One Contract, Demo to Keys
Everything under one agreement in Mortlake 2137: demolition, asbestos removal, site prep, design, approvals, engineering, new home construction, landscaping and Occupation Certificate.
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A knockdown rebuild in Mortlake costs $450,000–$1,200,000+. Standard single-storey from $450K, two-storey from $650K. Buildana manages demolition, City of Canada Bay Council approvals, and construction under one fixed-price contract.
Mortlake KDR — Single Contract, New Home
KDR in Mortlake works inland riverside stock outside HCAs. Wianamatta Shale soil; minimal rock excavation. Demolition $35K–$60K. Realistic premium turnkey $1.3M–$2.5M for 280–450m² build. Pre-construction 4–7 months.
On the ground in Mortlake (2137), the practical numbers shape every knockdown rebuild. Class M–H (Wianamatta Shale) / H (river/bay fall) soil — moderately to highly reactive clay — pushes engineered foundation work into the $24,000–$42,000 bracket on most 400–800m² blocks. R2 Low / R3 Medium / R4 (Rhodes/Concord West) zoning under City of Canada Bay Council sets the building envelope, with R3 Medium Density pockets that open up dual occupancy options on qualifying lots. Median sale price across Mortlake sits at $1.9M–$3.5M, which frames the build-versus-buy decision from the start. Nearest rail is North Strathfield (2 km) / Mortlake ferry to Putney, and that proximity affects everything from rental demand to construction site access.
Buildana manages the complete knockdown rebuild process in Mortlake — 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 Mortlake from $450K
- City of Canada Bay Council DA and CDC approvals managed
- Demolition and asbestos removal included
- Class M–H (Wianamatta Shale) / H (river/bay fall) soil — engineered slab design included
- Typical blocks 400–800m² in Mortlake
- Single and two-storey designs available
- 6-year structural warranty
- Free site assessment — near North Strathfield (2 km) / Mortlake ferry to Putney station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Why Knockdown Rebuild in Mortlake?
Mortlake is the riverside suburb adjacent to Breakfast Point — Federation cottages, inter-war heritage, post-war stock and contemporary on 400–800m² blocks. Heritage Conservation Areas cover several streets. Wianamatta Shale soil. Mortlake Wharf with Putney ferry connection.
Mortlake's mix of 1900s–1960s-era housing on 400–800m² blocks creates strong opportunity for property improvement. Median prices of $1.9M–$3.5M support quality build investment. Transport access via North Strathfield (2 km) / Mortlake ferry to Putney connects Mortlake to the wider Sydney network. 1900s–1960s-era housing stock across Mortlake is prime for knockdown rebuild — replacing dated layouts and materials with modern, NCC-compliant homes that maximise block potential. Soil conditions in Mortlake (Class M–H (Wianamatta Shale) / H (river/bay fall), moderately to highly reactive) are factored into every Buildana foundation design.
KDR in Canada Bay works inland village stock outside Heritage Conservation Areas — Concord, Five Dock, Russell Lea, Canada Bay, Wareemba and the inland portions of Mortlake and North Strathfield. Riverside heritage peninsulas (Abbotsford, Chiswick, Cabarita, parts of Drummoyne) are extension-restricted. Wianamatta Shale soil; rock excavation rare and shallow ($5K–$20K) on inland lots, deeper on sandstone-outcrop river-fall lots. Demolition $35K–$70K with asbestos prevalent in 50s–70s stock. Realistic premium turnkey $1.4M–$2.8M for 280–450m² build, peaking at $2.5M–$4.5M on river-fall premium blocks in Drummoyne and Abbotsford. Pre-construction 4–7 months.
Planning Controls — City of Canada Bay Council
Canada Bay LEP 2013 & Canada Bay DCP 2017. R2 Low Density covers most older residential streets: FSR 0.5–0.55:1, building height 8.5–9m, front setback 6–7.5m, landscaped area 35–40%. R3 Medium Density along Lyons Road, Great North Road, Concord Road and Parramatta Road permits FSR up to 0.85:1. R4 High Density and B4 Mixed Use concentrated on Rhodes peninsula (Rhodes Waterside, Concord Road towers), Concord West / North Strathfield station precincts, and Five Dock village (gearing up for Sydney Metro West 2030 — Five Dock station precinct already designated TOD). Heritage Conservation Areas cover the riverside peninsulas (Abbotsford, Chiswick, Cabarita, Mortlake, Drummoyne) plus pockets in Concord, Five Dock, Russell Lea, Wareemba, Rodd Point. Tree Preservation Order LGA-wide. Wianamatta Shale soil with sandstone outcrops on the river-fall peninsulas — fall to Parramatta River, Iron Cove, Hen and Chicken Bay, Canada Bay drives suspended slab engineering on premium river-fall lots. Five Dock Sydney Metro West (under construction, opening 2030) is the LGA's signature planning event — station-precinct overlay opens density bonuses inside 400m of Five Dock station. Rhodes peninsula has industrial-legacy soil contamination management protocols on remediated former Union Carbide site.
Knockdown-rebuild builder in Mortlake — key facts
- Suburb
- Mortlake, NSW 2137
- Council / LGA
- City of Canada Bay Council (City of Canada Bay)
- Primary zoning
- R2 Low / R3 Medium / R4 (Rhodes/Concord West)
- Typical lot size
- 400–800m²
- Soil class
- Class M–H (Wianamatta Shale) / H (river/bay fall)
- Median house price
- $1.9M–$3.5M
- Home era
- 1900s–1960s
- 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
Building in Mortlake — Local Context
Mortlake Block Realities
Typical Mortlake blocks are 400–800m² on Class M–H (Wianamatta Shale) / H (river/bay fall) ground (moderately to highly reactive clay). For a rebuild, the structural envelope is more constrained than the headline lot size suggests — once you subtract setbacks, easements, landscaped area requirements, and any tree preservation, the actual buildable area is usually 35-45% of the block. We map that early in the feasibility stage so you're designing to what's actually allowed, not what looks possible from the title plan. Foundation cost band on most Mortlake blocks: $24,000–$42,000.
Planning Controls in Mortlake
Mortlake is zoned R2 Low / R3 Medium / R4 (Rhodes/Concord West) with R3 Medium Density pockets. City of Canada Bay Council controls FSR, height limits (typically 8.5–9m), site coverage, landscaped area minimums, and setbacks. For a rebuild, the binding constraints on most 400–800m² blocks here are: front setback (around 4.5–6m), side setbacks (1.0–1.5m articulated), rear (3–6m depending on lot depth), and landscaped area (usually 35–40%). Buildana's design team works to those numbers from the first sketch — no late re-design when council comes back with comments.
Where the Money Goes on a Mortlake Rebuild
Cost breakdown for a typical rebuild in Mortlake: structure and frame around 30%, slab and foundations 8–14% (driven by Class M–H (Wianamatta Shale) / H (river/bay fall) soil), roofing and external 10–12%, services (plumbing, electrical, HVAC) 12–18%, fit-out (kitchen, bathrooms, joinery) 18–25%, and finishes (paint, tiles, flooring) 8–12%. The remaining 4–6% covers approvals, certifications, and site establishment. Buildana itemises every line so you see what you're paying for — no lump sums hiding margin.
Designing for the Mortlake Streetscape
Mortlake's housing stock is predominantly from the 1900s–1960s. North Strathfield (2 km) / Mortlake ferry to Putney from the nearest station. The local anchor is Mortlake ferry wharf. For a knockdown rebuild, the streetscape question matters more than most builders admit — a brand-new double-storey on a street of single-storey 1900s–1960s weatherboards will draw council attention on bulk and scale, even if technically compliant. Buildana designs the front elevation to read appropriately for the street while modernising the floor plan and structure behind it. Materials palette, roof pitch, fenestration rhythm — all chosen to settle into the existing rhythm rather than fight it.
What Recent Approvals Show
City of Canada Bay Council's recent decisions for Rebuilds in Mortlake reveal a clear pattern — applications that demonstrate genuine understanding of City of Canada Bay Council's DCP — not just the State controls — progress materially faster. Sloppy lodgement adds 4-8 weeks of round-trip; clean lodgement doesn't.
Builder's Take on Mortlake
One-contract KDR in Mortlake vs two-contractor (demo + builder separately): two-contractor looks cheaper on paper but the site risk transfers to you between the crews. Old footings, buried tanks, boundary disputes — all your problem. Buildana's single contract keeps the risk with the contractor.
KDR maths in Mortlake usually wins against deep renovation once renovation costs cross $300K. Below that, renovation is competitive. Above it, you're paying renovation pricing for a home that's still structurally 1970s. New build gives you 6-year warranty, NCC 2025 performance, and a genuine reset on property value.
Mortlake vs Nearby Suburbs
Mortlake vs nearby suburbs — key metrics for knocking down and rebuilding.
| Suburb | Median Price | Typical Lot | Soil Class | Era | Station |
|---|---|---|---|---|---|
| Mortlake2137this suburb | $1.9M–$3.5M | 400–800m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 1900s–1960s | North Strathfield (2 km) / Mortlake ferry to Putney |
| Cabarita2137 | $2.5M–$5M | 500–1,000m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 1900s–1940s | North Strathfield (2 km) |
| Breakfast Point2137 | $2.0M–$4M | 200–500m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 2000s+ master-planned | North Strathfield (3 km) |
| Concord2137 | $2.2M–$4M | 500–900m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 1900s–1960s | Concord West (1 km) |
Median price, soil class, and lot size shape build feasibility and final cost. Buildana assesses every site against these and other constraints during the free feasibility stage.
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How It Works
From First Call to Final Key
KDR starts with an honest look at the existing house. Sometimes it's worth keeping. Most Mortlake homes from the 1900s–1960s — especially fibro and brick-veneer — are beyond the point where renovation makes sense. We tell you straight.
⏱Demolition is pre-approved to run parallel with rebuild design. Asbestos cleared, services abolished, site stripped in a single mobilisation. Geotech reconfirms Class M–H (Wianamatta Shale) / H (river/bay fall) soil with the old house gone.
⏱New house goes up on the same footprint or a better one, whichever serves the block. Modern NCC envelope, better orientation, fit-for-purpose room sizes. The suburb stays the same; the house finally fits it.
⏱Final handover: new OC, six-year structural warranty, all the documentation on your Mortlake block you'd get on a greenfield build. The only difference is you still live in the street you chose.
⏱Quality Promise
Mortlake knockdown rebuild done cleanly: licensed demolition, compliant slab, new home built to NCC 2025. Fixed-price contract.
Cost Guide
| Item | Estimated Range |
|---|---|
| Clean demolition + standard rebuild | $460,000 – $710,000 |
| Asbestos-affected demolition + rebuild | $480,000 – $760,000 |
| Sloping site + cut/fill + rebuild | $530,000 – $860,000 |
| Heritage-affected or complex site | $570,000 – $1,050,000 |
| Premium finishes & architectural design | $900,000+ |
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
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Liverpool, NSW
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Last updated: 1 April 2026
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