Mortlake Home Builder — Custom Homes, KDR, Duplex
Licensed NSW builder (HBL 487805C) · Fixed-price contracts · Canada Bay DA + CDC managed in-house
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 is shaped by its lot pattern — R2 Low default, 600m² for duplex where it's permitted — and by 1900s–1960s housing stock that's increasingly being rebuilt rather than extended. Mortlake ferry wharf sits at the suburb's centre of gravity.
Council
City of Canada Bay
Median price
$1.9M–$3.5M
Build cost (mid-spec)
$2,000–$3,000/m²
Typical lot
400–800m²
Soil class
M–H
DA timing
11–15 wks
Builder perspective
Building in Mortlake — what we actually look at first
Mortlake sits on the river next to Breakfast Point with a ferry to Putney, and a builder in Mortlake works a riverside suburb that's a touch more affordable than the premium peninsula names. Federation cottages, inter-war heritage, post-war stock and contemporary homes sit on 400–800m² blocks, with Heritage Conservation Areas over several streets and a $1.9M–$3.5M median that opens the door a little wider than Abbotsford or Cabarita.
The mixed stock and the slightly softer median mean more scope for a genuine rebuild alongside the heritage-respectful work — where a block sits clear of the Conservation Areas, a clean-sheet home is on the table, and the 600m² duplex minimum is reachable on the larger lots. Heritage controls shape the listed streets, and Wianamatta Shale keeps footings predictable. The Mortlake wharf and the Putney ferry set the lifestyle. We check heritage status and lot size first, then design to what your Mortlake block can carry.
Oliver Alameri — Founder & licensed builder
HBL 487805C · Reading Mortlake sites since day one
Mortlake build context
The data we use to feasibility-check a Mortlake lot before quoting.
Council
City of Canada Bay
Postcode
2137
Primary zoning
R2 Low
Typical lot size
400–800m²
Predominant home era
1900s–1960s
Soil class (AS 2870)
M–H
Duplex minimum lot
600m²
Median price band
$1.9M–$3.5M
Granny flat rental
$550–$850/week
Train station
North Strathfield (2 km) / Mortlake ferry to Putney
Build cost (mid-spec)
$2,000–$3,000/m² · Rawlinsons 2026
Why owners build with Buildana in Mortlake
Same six facts on every contract — we just write them down so you can hold us to them.
- Licensed NSW builder (HBL 487805C) with HIA fixed-price contracts — provisional sums kept to a minimum and itemised when used.
- City of Canada Bay we project-manage the approval, not just the build — design, certifier, BASIX, council, all sequenced by us.
- BASIX, structural certification and any referral agency work (RFS, Heritage, Sydney Water) handled in-house — you sign one contract.
- Asbestos clearance handled by SafeWork NSW licensed contractors — pre-1990 fibro stock priced into the contract.
- Demolition through handover on a fixed contract — costing benchmarked to Rawlinsons, not back-of-envelope.
- Anchored on the amanah principle — the scope on contract day is the scope at handover. Local landmark: Mortlake ferry wharf. Train: North Strathfield (2 km) / Mortlake ferry to Putney.
Mortlake build economics
Indicative cost ranges for a Buildana build in Mortlake, benchmarked against the Rawlinsons Australian Construction Handbook 2026 Sydney baseline and adjusted for the local cost profile (Mortlake sits below the Sydney median by 5%). Every figure is a starting point — a real feasibility shifts it by site condition, brief and finish spec.
| Build type | Indicative range | Spec assumptions |
|---|---|---|
| Single-storey custom home (200m² GFA, mid-spec) | $2,000–$3,000/m² × 200m² | Brick veneer, ColorBond roof, mid-tier joinery and finishes — Rawlinsons 2026 Sydney medium-spec baseline. |
| Double-storey custom home (300m² GFA, mid-spec) | $2,000–$3,000/m² × 300m² | Two-storey brick veneer, light-frame upper, ColorBond or tile, mid-spec finishes — first-floor adds engineering and access loadings. |
| Premium custom home (350m²+, full-brick or rendered) | $3,000–$5,000/m² × 350m²+ | Full-brick or rendered structure, hardwood or stone external, custom joinery throughout — Rawlinsons high-spec baseline. |
| Detached duplex (combined 350m² GFA) | $2,000–$3,000/m² combined | Twin-slab on separate footings or party-wall slab; independent services; BCA Vol 2 acoustic separation. |
| Knockdown rebuild (200m², mid-spec, includes demo) | $2,000–$3,000/m² × 200m² + $0–$0K demo | Demolition (incl. SafeWork-licensed asbestos clearance), geotech, slab, frame, full mid-spec finish. |
| Granny flat (60m², Class 1a) | $180,000–$250,000 turnkey | Class 1a secondary dwelling, full kitchen + bathroom, BASIX-compliant, SEPP-pathway CDC where lot qualifies. |
Source: Rawlinsons Australian Construction Handbook 2026 (Sydney section), adjusted for Mortlake cost profile via Buildana's internal suburb cost-adjustment matrix. Figures exclude land, professional fees, council contributions and FF&E.
Free Mortlake feasibility
Thinking about building in Mortlake? Start with the numbers, not a sales pitch.
Send us your address and rough brief. We'll come back with a straight read on your block — zoning, soil class, frontage, approval path and a real cost range against Rawlinsons 2026. No obligation, no pressure, just the facts you need before you spend a dollar on design.
Buildana services in Mortlake
All six core services delivered across the Canada Bay — each one priced against Mortlake's specific site context, not a generic Sydney baseline.
Knockdown Rebuild
Demo to keys on a fixed price. Asbestos handled by licensed contractors, slab engineered to the report, build sequenced properly.
Mortlake knockdown rebuild approachDuplex
Attached or detached duplex on R2/R3 lots that meet local DCP minimum lot size — twin-slab engineering and approvals managed.
Mortlake duplex approachGranny Flat
Detached secondary dwelling on R2 — if the lot complies it's CDC, if it doesn't we lodge the DA.
Mortlake granny flat approachCustom Home
Brief, block and budget — we balance the three at concept stage so the design doesn't get value-engineered into something you didn't want.
Mortlake custom home approachExtension
Adding to an existing home is harder than starting fresh — we pre-investigate slab, frame and roof before quoting.
Mortlake extension approachRenovation
Renovations scoped properly upfront — waterproofing, electrical compliance, smoke alarms, hardwired CO detectors, all to current BCA.
Mortlake renovation approachApproval pathway in Mortlake
Canada Bay Council, the Parramatta River foreshore municipality.
In Mortlake, the approval pathway depends on whether the design ticks every box of State Environmental Planning Policy (Exempt and Complying Development Codes) 2008. If it does, a Complying Development Certificate (CDC) through a private certifier is faster — 15–25 working days for code-compliant rebuilds, no neighbour notification. Where the design pushes setbacks, height or site-coverage limits, we lodge a Development Application (DA) with City of Canada Bay Council. 11–15 weeks for a single-dwelling DA. DA application fees fall in the $2,000–$3,400 base for a class 1a residential da band. Buildana runs both pathways in-house. Knockdown rebuilds on standard R2 Low lots are usually CDC; duplex on 600m²+ blocks is usually DA unless it's a battle-axe configuration.
CDC pathway
Private certifier · 15–25 working days for code-compliant rebuilds · no neighbour notification. Design must comply exactly with the Codes SEPP.
DA pathway
City of Canada Bay merit assessment · 11–15 weeks for a single-dwelling DA · DA fees $2,000–$3,400 base for a Class 1a residential DA. Used where the design pushes a code limit.
Section 7.11 / 7.12 developer contributions in Mortlake: Typically $8K–$18K per dwelling.
Mortlake site considerations
Costing a Mortlake build properly means pricing site conditions first, finishes second. The M–H soil profile sets the slab type — that's a $15K–$45K swing on its own. Trees protected under City of Canada Bay Council's tree preservation order create exclusion zones around root protection areas; engineered building setbacks can remove 5–10% of buildable footprint on some lots. Pre-1990 1900s–1960s stock means asbestos clearance under a Class B licence — non-negotiable, priced upfront. The number we quote on day one is the number you pay at handover.
Soil & footings
Class M–H (Wianamatta Shale) / H (river/bay fall) reactivity drives waffle-pod, stiffened raft or piered slab — engineered to a real geotech, not a desktop guess.
Demolition
Pre-1990 1900s–1960s stock means SafeWork-licensed asbestos clearance — priced into the contract upfront, with the clearance certificate before slab pour.
Flood & bushfire
Flood risk: low. Bushfire risk: very low. Heritage exposure: moderate. We map your lot against each before quoting.
Local overlays the City of Canada Bay planner will check first
- Heritage (Concord, Cabarita, Five Dock pockets)
- Foreshore Scenic Protection Area (Parramatta River, Iron Cove, Hen and Chicken Bay)
- Acid sulfate soils on river flats
- Industrial-legacy contamination
Recent builds nearby
Buildana projects in the Canada Bay
We work continuously across Canada Bay — single-storey customs, double-storey rebuilds, side-by-side duplex on R2 lots that comply with City of Canada Bay's DCP minimum frontage, granny flats on SEPP secondary-dwelling pathways. Most projects start with the same conversation we'd have about your Mortlake site: title, zone, slope, frontage, soil. Then design. Then fixed-price contract.
Real project case studies
Read full Buildana builds — the challenge, the fixed-price solution, the real timeline and cost — across Western Sydney.
Read case studiesCanada Bay hub
Full Canada Bay builder hub — every suburb we work in, every service, council pathway notes.
Open Canada Bay hubFree Mortlake site check
Send your Mortlake address — we'll run title, zone, slope, frontage and soil before you spend a dollar.
Book a site checkMortlake build FAQs
The questions we get asked most often on a first Mortlake site walk.
- Do you do extensions and renovations in Mortlake?
- Yes — ground-floor additions, second-storey adds, full-house renovations, kitchens and bathrooms in Mortlake. The complication on 1900s–1960s housing stock is that you can't price an extension off the plans alone — we pre-investigate the existing slab, frame, roof tie-in and wet-area waterproofing before quoting. Surprises during demolition are the most common reason renos blow their budget; we eliminate that by inspecting first.
- How long does a DA take with City of Canada Bay Council?
- 11–15 weeks for a single-dwelling DA. CDC through a private certifier is the alternative where the design complies with the Codes SEPP — 15–25 working days for code-compliant rebuilds. Council DA application fees fall in the $2,000–$3,400 base for a class 1a residential da range. Buildana lodges either pathway and runs all RFI responses through to determination.
- Why does Mortlake cost different from a generic Sydney average?
- Mortlake sits very close to the Sydney metropolitan median build cost, with small adjustments for local site access and trade availability.
- How long does a custom home build take in Mortlake?
- From contract signed to handover, a single-storey 4-bedroom custom home in Mortlake typically takes 9–11 months on a CDC pathway, or 12–14 months if the design needs a DA through City of Canada Bay Council. Add 4–6 weeks for double-storey. Pre-construction (design, engineering, BASIX, approval, contract) runs in parallel and adds another 8–16 weeks before site start. Buildana sequences both phases so the design effort and the approval effort don't sit waiting on each other.
- Can I build a duplex in Mortlake?
- Duplex feasibility in Mortlake depends on lot size and zoning. The minimum lot for dual occupancy under City of Canada Bay Council's DCP is 600m², and R3 Medium Density lots in the suburb can support attached duplex or townhouse configurations. We run a feasibility check on title, zone, area, frontage and slope before quoting — no point designing what won't approve.
- What's the granny flat pathway in Mortlake?
- Granny flats in Mortlake are usually built under State Environmental Planning Policy (Affordable Rental Housing) 2009 — secondary dwellings up to 60m², CDC pathway, no DA required on most compliant R2 Low lots. Typical rental return is $550–$850/week. The block needs minimum 450m², a primary dwelling already on it, and compliance with side/rear setbacks. Where the lot doesn't comply with SEPP, we lodge a DA with City of Canada Bay Council.
- What soil class is typical in Mortlake 2137?
- Mortlake ground is typically M–H based on the AS 2870 site classifications and geotech we've worked with in the suburb. That drives slab design — waffle-pod, stiffened raft or a piered system depending on the report. We never assume it; every Buildana build commissions a geotechnical investigation before slab engineering. The geotech report is yours to keep, regardless of which builder you use after.
- What does it cost to knock down and rebuild in Mortlake?
- End values in Mortlake sit in the $1.9M–$3.5M range based on recent sales. A typical knockdown rebuild — demo, asbestos clearance, geotech, slab, frame, full mid-spec finish for a 200m² single-storey — runs $2,000–$3,000/m² × 200m² + $0–$0k demo as a Rawlinsons-aligned 2026 baseline. We benchmark every line to the Rawlinsons Australian Construction Handbook, not back-of-envelope figures. Send through your block address and we'll run a proper feasibility against what's actually achievable on the lot.
Nearby Canada Bay suburbs we build in
Adjacent Canada Bay suburbs covered by the same City of Canada Bay approval pathway and a similar site-cost profile.
Ready to talk about your Mortlake build?
Free site feasibility, honest cost framing against $2,000–$3,000/m²/m² baseline, fixed-price contract. City of Canada Bay pathway managed in-house — no surprise variations.