Five Dock Home Extension Builder — Live In, Build On
Buildana extends homes across Five Dock 2046 while you stay in place. 1900s–1960s-era structure, City of Canada Bay Council rules, weatherproofing during build — all managed locally from Fairfield.
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A home extension in Five Dock costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, City of Canada Bay Council approvals, and construction under one fixed-price contract.
Second-Storey & Rear Additions in Five Dock
Extension in Five Dock is Federation and inter-war cottage additions on 450–800m² blocks. HCAs restrict scope on character streets. Sydney Metro West 2030 reshaping value across the suburb. Realistic budget $280K–$780K for 70–130m² addition. Pre-construction 5–7 months.
For a extension in Five Dock, the economics are the framing question. Median price $2.0M–$3.8M; build cost on 450–800m² blocks scales by site conditions and specification. Class M–H (Wianamatta Shale) / H (river/bay fall) ground (moderately to highly reactive clay) keeps foundations honest — $24,000–$42,000 band — and blowouts on that line are the single most common reason fixed-price contracts elsewhere don't stay fixed. Buildana itemises the slab, structural engineering, and geotech work upfront so you see the actual cost in the contract. R3 zoning in pockets of Five Dock opens up dual occupancy potential — worth exploring even if you're not initially considering it.
Buildana manages the complete home extension process in Five Dock — from design consultation and structural engineering through to DA or CDC approval, and fixed-price construction to handover. Extend your home without the stress.
Read our Home Extension Cost Guide 2026 or explore extension approval pathways in NSW.
- Home extensions in Five Dock from $150K
- City of Canada Bay Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M–H (Wianamatta Shale) / H (river/bay fall) soil — structural engineering included
- 1900s–1960s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Five Dock Metro (Sydney Metro West, opening 2030) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Why Extend Your Home in Five Dock?
Five Dock is the inland village heart of the LGA — Federation and inter-war cottages, Italian-Australian post-war stock and contemporary infill on 450–800m² blocks. Heritage Conservation Areas cover several streets. R3 along Great North Road and Lyons Road permits medium-density. Wianamatta Shale soil. The Sydney Metro West (under construction) will deliver Five Dock station 2030.
Five Dock's mix of 1900s–1960s-era housing on 450–800m² blocks creates strong opportunity for property improvement. Median prices of $2.0M–$3.8M support quality build investment. Five Dock benefits from Five Dock Metro (Sydney Metro West, opening 2030) station on the doorstep — walkable rail access lifts both rental demand and property values. 1900s–1960s-era homes in Five Dock often have good structural foundations worth building on. Extensions add living space at a fraction of the full rebuild cost. Soil conditions in Five Dock (Class M–H (Wianamatta Shale) / H (river/bay fall), moderately to highly reactive) are factored into every Buildana foundation design.
Extension is the dominant scope across the Canada Bay riverside heritage peninsulas (Abbotsford, Chiswick, Cabarita, parts of Drummoyne, Mortlake) where KDR is restricted. Federation cottage additions, inter-war heritage extensions, river-fall heritage-grade work all common. Suspended slabs on river-fall sites; foreshore consent on direct waterfront lots. Heritage Council expects retention of stained glass, ornate plasterwork, slate roofing on protected streets. Apartment renovations the other major category — Rhodes high-rise, Concord West / North Strathfield station precincts, Liberty Grove townhouses. Realistic budget $300K–$900K for thoughtful 60–130m² addition; $700K–$1.8M premium river-fall heritage-grade work.
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.
Home extension builder in Five Dock — key facts
- Suburb
- Five Dock, NSW 2046
- Council / LGA
- City of Canada Bay Council (City of Canada Bay)
- Primary zoning
- R2 Low / R3 Medium / R4 (Rhodes/Concord West)
- Typical lot size
- 450–800m²
- Soil class
- Class M–H (Wianamatta Shale) / H (river/bay fall)
- Median house price
- $2.0M–$3.8M
- Home era
- 1900s–1960s
- Typical price range
- $150,000 – $600,000+
- Typical timeline
- 6–12 months design to handover
- Approval pathway
- CDC for most rear extensions, DA for second-storey
Building in Five Dock — Local Context
Foundations & Slab Design for Five Dock
Five Dock's ground is moderately to highly reactive clay (Class M–H (Wianamatta Shale) / H (river/bay fall)). On a 450–800m² block, that translates to engineered slab work in the $24,000–$42,000 bracket for a extension. Double-check any quote that doesn't itemise the slab — 'slab as per engineering' usually means the builder will hit you with a variation once the soil report comes back. We commission the geotech upfront, before pricing, so the cost in your contract reflects what your block actually needs. If your neighbour's home shows movement cracks above architraves or below window sills, that's a signal worth knowing before you finalise design — Buildana's site assessment looks at adjacent stock too.
Approval Timeline for Five Dock
Realistic timeline for a extension in Five Dock: 8–14 weeks for DA through City of Canada Bay Council. Add 2–4 weeks before lodgement for documentation, BASIX certificate, geotech report, and survey if you don't already have one. Construction Certificate is issued separately before works commence.
Five Dock Build Economics
Five Dock sits in the $2.0M–$3.8M price band, which is the framing for any home extension decision. On a 450–800m² block here, the build-versus-buy maths usually favours extension when the existing slab and frame are sound and you only need 30–50% more floor area. Free Buildana feasibility runs the numbers against your actual block before any commitment.
Designing for the Five Dock Streetscape
Five Dock's housing stock is predominantly from the 1900s–1960s. Five Dock Metro (Sydney Metro West, opening 2030) station is the rail anchor for the suburb. The local anchor is Great North Road shopping village. For a home extension, 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.
Why Some Five Dock Builds Stall
Builds in Five Dock stall for predictable reasons. Lodgement defects (missing BASIX, wrong drawing scale, undeclared overlays). Soil surprises on Class M–H (Wianamatta Shale) / H (river/bay fall) ground when the builder didn't commission a borehole upfront. Variation creep when the contract was light on inclusions. Trade scheduling gaps when the builder is over-committed across too many sites. City of Canada Bay Council delays when neighbour objection triggers committee review. Buildana protects against each of these at contract stage — fully documented lodgement pack, geotech in the price, itemised inclusions instead of allowances, and a tight project-manager-to-job ratio that keeps trades moving.
Builder's Take on Five Dock
Matching brick on a Five Dock extension: 1900s–1960s brick is often discontinued. We specify a close-match or deliberately contrast with render or cladding so the extension reads as intentional, not as a failed match. Done well, an intentional contrast looks better than a forced match.
Extension or move? In Five Dock, the maths usually favours extension once you factor in stamp duty ($40K–$60K), agent fees ($25K–$40K), and moving costs. An extension of $200K–$350K often delivers the space without the 12-week disruption of moving.
Five Dock vs Nearby Suburbs
Five Dock vs nearby suburbs — key metrics for extending.
| Suburb | Median Price | Typical Lot | Soil Class | Era | Station |
|---|---|---|---|---|---|
| Five Dock2046this suburb | $2.0M–$3.8M | 450–800m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 1900s–1960s | Five Dock Metro (Sydney Metro West, opening 2030) |
| Russell Lea2046 | $2.2M–$4M | 450–800m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 1900s–1940s | Drummoyne ferry (1.5 km) |
| Drummoyne2047 | $2.5M–$6M | 350–700m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 1900s–1940s + apartments | Drummoyne ferry / Lilyfield Light Rail (across bridge) |
| Canada Bay2046 | $2.0M–$4M | 450–800m² | Class M–H (Wianamatta Shale) / H (river/bay fall) | 1900s–1940s | Concord West (2.5 km) / Drummoyne ferry |
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.
Have a question about your project?
Talk to our team — free site assessment and fixed-price quote.
How It Works
From First Call to Final Key
The first job on an extension is finding out what you're extending onto. Five Dock homes from the 1900s–1960s were built to different standards — we open walls, check footings, verify load paths. The existing house has to carry the new work.
⏱Design follows the existing roof. A bad extension looks like a bolt-on; a good one reads as original. Matched brickwork or contrasting render (whichever the architecture calls for), tied-in roofline, continuous flooring where it should be continuous.
⏱Construction happens while you live in the house. That means weatherproofing every night, staging the works so kitchens and bathrooms don't disappear on the same week, and keeping the site clean of debris that doesn't belong in a family home.
⏱Finish is seamless. Paint match, floor match, roofline match, brick match where possible. The only way to tell the extension is new is the date on the plans.
⏱Quality Promise
Every Buildana home extension in Five Dock is delivered under a fixed-price contract — from design consultation through to defect-free handover.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $90,000 – $200,000 |
| Moderate extension (multiple openings, roof extended) | $200,000 – $380,000 |
| Complex extension (structural steel portals, re-roofing) | $380,000 – $600,000 |
| Second-storey tie-in (existing house re-engineered) | $350,000 – $650,000 |
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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Last updated: 1 April 2026
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