Dual Occupancy Specialists Longueville — Licensed Duplex Builder
NSW licensed duplex builder in Longueville 2066. Torrens or strata subdivision, Lane Cove Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Quick Answer
A duplex in Longueville costs $750,000–$1,500,000+ for dual occupancy construction. Attached duplex from $750K, detached from $1M. Buildana manages feasibility, Lane Cove Council approvals, construction and subdivision under one fixed-price contract.
Longueville Dual Occ. — Feasibility to Handover
Duplex in Longueville is effectively impossible — Heritage Conservation Areas cover most streets, Council defaults to retention of harbour-fall heritage character. Realistic advice is extension/restoration. Mandatory paid feasibility.
Practical realities of building a duplex in Longueville: Nearest rail is Wollstonecraft (4 km, ferry), which influences site access during construction (deliveries, cranage, skip placement). 600–1,400m² blocks usually have enough room for proper site set-up, but tight battle-axe lots and narrow frontages need staging plans factored into the build program. Lane Cove Council processes a steady volume of residential applications — clean documentation moves fast, and Buildana lodges everything at full standard the first time. Class M (sandstone ridges) / H–E (river fall) soil (extremely reactive clay) sets foundation cost in the $45,000–$80,000 range; budget allocation for that line item is fixed in your contract, not estimated.
Buildana manages the full duplex development process in Longueville — from feasibility assessment and architectural design through to DA or CDC approval, and fixed-price construction to dual handover. One builder, one contract, two homes.
Read our Complete Duplex Building Guide or explore duplex developments across Sydney.
- Dual occupancy in Longueville from $750K
- Lane Cove Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 550m² in Longueville
- Class M (sandstone ridges) / H–E (river fall) soil — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Wollstonecraft (4 km, ferry) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Why Build a Duplex in Longueville?
Longueville is the harbour-fall peninsula on the north side of Tambourine Bay and Woodford Bay. Federation mansions, inter-war heritage and contemporary harbour-fall builds on 600–1,400m² blocks. Heritage Conservation Areas cover most streets. Sandstone-dominant with substantial fall to the water. Lane Cove River and Woodford Bay frontage. Premium for harbour outlook.
Longueville's established streetscape and median house prices of $3.5M–$7.5M reflect a premium location within Lane Cove. Building costs sit above the metro average, offset by stronger capital growth and rental returns. Transport access via Wollstonecraft (4 km, ferry) connects Longueville to the wider Sydney network. Dual occupancy is well-established in Longueville's R3 zones. Minimum lot size for duplex: 550m². Ground conditions (Class M (sandstone ridges) / H–E (river fall)) across Longueville are well understood by local builders — Buildana's engineering accounts for extremely reactive soil movement.
Duplex feasibility in Lane Cove sits in R2 detached pockets meeting 550m² minimum across Lane Cove proper, Lane Cove North and inland portions of Riverview and Lane Cove West. R3 medium-density along Burns Bay Road and Longueville Road permits attached duplex — most sites already developed as apartments though. Crows Nest Metro 2024 SEPP TOD precinct in Lane Cove North redirects density to higher-form redevelopment. End values $2.5M–$4.5M per attached dwelling. Heritage Conservation Areas effectively rule out duplex on Greenwich, Longueville, Northwood, Linley Point. Mandatory paid feasibility — site selection determines everything.
Planning Controls — Lane Cove Council
Lane Cove LEP 2009 & Lane Cove DCP 2010. R2 Low Density dominates the LGA: FSR 0.5:1, building height 9.5m, front setback 7.5–9m varying by streetscape, landscaped area 35–40%. R3 Medium Density along Burns Bay Road, Longueville Road and the Lane Cove village core permits FSR up to 0.8:1. R4 High Density and B4 Mixed Use along the St Leonards / Crows Nest fringe in Lane Cove North. The 2024 Crows Nest Metro SEPP TOD precinct overlay reaches the south-eastern portion of Lane Cove North, opening density bonuses inside 400m of Crows Nest Metro station. Heritage Conservation Areas cover most older streets in Greenwich, Longueville, Northwood, Linley Point, Lane Cove West, Riverview and parts of Lane Cove village. Tree Preservation Order applies LGA-wide. River-fall and harbour-fall sites on the Lane Cove River and Sydney Harbour peninsulas (Greenwich, Longueville, Northwood, Linley Point) require engineered slab and retaining design — sandstone rock excavation $20K–$60K standard. Lane Cove National Park frontage on Lane Cove West and Riverview adds bushfire BAL ratings on bush-edge lots.
Duplex builder in Longueville — key facts
- Suburb
- Longueville, NSW 2066
- Council / LGA
- Lane Cove Council (Lane Cove)
- Primary zoning
- R2 Low Density / R3 Medium (Lane Cove village)
- Typical lot size
- 600–1,400m²
- Soil class
- Class M (sandstone ridges) / H–E (river fall)
- Median house price
- $3.5M–$7.5M
- Home era
- 1880s–1940s heritage
- Typical price range
- $750,000 – $1,500,000+
- Typical timeline
- 14–22 months design to handover
- Approval pathway
- CDC for compliant dual-occupancy, else DA
Building in Longueville — Local Context
Longueville Block Realities
Typical Longueville blocks are 600–1,400m² on Class M (sandstone ridges) / H–E (river fall) ground (extremely reactive clay). For a duplex, 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 Longueville blocks: $45,000–$80,000.
Lane Cove Planning Context
Lane Cove has its own LEP and DCP layered over State planning controls. For building a duplex in Longueville, the practical impact: Lane Cove Council's DCP sets local rules for streetscape character, materials palette in some precincts, vehicle crossover widths, and tree retention. R2 Low Density / R3 Medium (Lane Cove village) zoning on most Longueville blocks permits dual occupancy subject to lot size (550m² minimum) and frontage. Buildana checks every overlay (heritage, bushfire, flood, acid sulfate soil, biodiversity) before quoting.
What a Duplex Costs in Longueville
Longueville's median house price sits at $3.5M–$7.5M. That's the number that decides whether a duplex development stacks up financially. New duplex sales in Lane Cove are tracking $1.35M–$1.85M per dwelling — strong gap above $3.5M–$7.5M for the original house, which is what drives the development margin. Buildana provides itemised quotes — no provisional sums, no allowances, no "as per engineering" line items.
Longueville Housing Stock & What That Means
Most homes in Longueville were built 1880s–1940s heritage. That puts asbestos risk firmly in play — sheeting, eaves linings, vinyl floor tiles, and pipe lagging are likely. Licensed removal adds $5,000–$25,000 to a duplex where demolition is involved, and Buildana manages SafeWork NSW notifications, removal, and clearance certificates as part of the contract.
Building Activity in Longueville Right Now
Longueville is seeing steady residential activity — the July 2024 R2 duplex reform opened up dozens of blocks across the suburb that previously couldn't develop, and Lane Cove Council is processing dual occupancy DAs at a higher volume than at any point in the last decade. Buildana sits inside that pipeline — we know what's getting approved, what's stalling, and why.
Builder's Take on Longueville
Longueville duplex feasibility comes down to three numbers: lot size, street frontage, and R2 Low Density / R3 Medium (Lane Cove village) zoning. 550m² is the council threshold. Frontage under 15m is where designs start getting awkward. If your block ticks both, you're likely feasible — but the feasibility report still has to check FSR, setbacks, and landscape area under Lane Cove Council's DCP.
One Longueville mistake I see: duplex owners trying to maximise floor area and ending up with zero garden. Buyers and tenants in this area value a usable backyard more than an extra 15m² of living room. Good dual occ. design leaves both dwellings with genuine private open space.
Longueville vs Nearby Suburbs
Longueville vs nearby suburbs — key metrics for building a duplex.
| Suburb | Median Price | Typical Lot | Soil Class | Min Duplex Lot | Station |
|---|---|---|---|---|---|
| Longueville2066this suburb | $3.5M–$7.5M | 600–1,400m² | Class M (sandstone ridges) / H–E (river fall) | 550m² | Wollstonecraft (4 km, ferry) |
| Lane Cove2066 | $2.4M–$4.0M | 400–700m² | Class M (sandstone ridges) / H–E (river fall) | 550m² | St Leonards (2.5 km) |
| Northwood2066 | $4.0M–$8.0M | 600–1,400m² | Class M (sandstone ridges) / H–E (river fall) | 550m² | Wollstonecraft (3 km, ferry from Longueville) |
| Riverview2066 | $3.0M–$5.5M | 500–1,200m² | Class M (sandstone ridges) / H–E (river fall) | 550m² | Wollstonecraft (3 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.
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
Free feasibility check on your Longueville block. We measure frontage width, confirm zoning (R2 Low Density / R3 Medium (Lane Cove village)), check minimum lot size against 550m² requirement, and review Lane Cove Council's DCP controls.
⏱Two dwellings, one site — design is mostly about geometry. Frontage split, party wall position, garage stacking, private courtyard size, and the streetscape elevation a certifier will actually approve.
⏱DA through Lane Cove Council (40–90 days) or CDC (10–15 business days). Longueville is zoned R2 Low Density / R3 Medium (Lane Cove village).
⏱Dual construction runs 9–14 months. Engineered slabs sized for Class M (sandstone ridges) / H–E (river fall) soil, simultaneous frame-up, staggered fit-out for efficiency.
⏱Two homes, two titles, two OCs, two warranty packs. We hand over a clean documentation set per dwelling: certifier reports, BASIX certs, structural sign-offs, appliance warranties, maintenance schedules.
⏱Quality Promise
Every Buildana duplex in Longueville is built under a fixed-price contract — feasibility through to dual handover and subdivision.
Cost Guide
| Item | Estimated Range |
|---|---|
| Vacant R2/R3 block in Longueville — duplex build | $960,000 – $1,920,000 |
| KDR duplex (demo 1880s–1940s heritage home + dual build) | $1,050,000 – $2,050,000 |
| Subdivision-ready block (existing survey & titles) | $960,000 – $1,790,000 |
| Corner block dual-frontage duplex | $1,150,000 – $2,050,000 |
| Investor scenario (neutral-gear focus, rental-ready) | $1,090,000 – $1,600,000 |
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
Estimate Your Build Cost
Use our free calculator to get an instant cost estimate for your project
Ready to take the next step?
Free consultation — no obligation, no pressure.
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
We Build Across Sydney
Buildana builds across greater Sydney — with deep roots in Western Sydney's Fairfield, Liverpool, Cumberland, Canterbury-Bankstown, and Blacktown LGAs.
Last updated: 1 July 2025
Longueville Dual Occupancy — Free Feasibility
Free duplex feasibility assessment for Longueville 2066. We'll check your block, estimate yield, and provide a fixed-price budget.
Start Your Project