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
A duplex in Longueville is rarely the play, because near-total heritage coverage and a premium harbour market favour a single home. This harbour-fall peninsula on Tambourine Bay and Woodford Bay runs Federation mansions and inter-war heritage on 600 to 1,400m2 blocks with substantial fall to the water, and Heritage Conservation Areas cover most streets, so a dual-occupancy is constrained or precluded on contributory lots. At a $3.5M to $7.5M market a single premium residence usually returns more than splitting a block.
The sandstone-dominant soil and harbour fall mean deep rock and engineered retaining, so a duplex spreads a high site cost across two footprints. I would rather give you the honest read than push the wrong product. Where the existing home carries fibro a licensed asbestos strip-out comes first.
What I would check first on your Longueville block: the heritage status, whether a single premium home is the clear best use, and the deep rock and harbour-fall retaining. That decides the direction.
We build these fixed-price, licence HBL 487805C. Send me the address and I will tell you honestly what the block suits.
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
- M — 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
Heritage and premium harbour
This harbour-fall peninsula runs Federation mansions and inter-war heritage on 600 to 1,400m2 blocks with substantial harbour fall.
Conservation Areas cover most streets, so a dual-occupancy is constrained or precluded, at a $3.5M to $7.5M market.
Deep rock and retaining
The sandstone-dominant soil and harbour fall mean deep rock and engineered retaining across both dwellings.
A duplex spreads a high site cost across two footprints, with older fibro stripped under licence first.
Duplex builder in Longueville — key facts
- Suburb
- Longueville, NSW 2066
- Council / LGA
- Lane Cove Council (Lane Cove)
- Primary zoning
- R2 Low Density
- Typical lot size
- 600–1,400m²
- Soil class
- M
- 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
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.
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), 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.
⏱Dual construction runs 9–14 months. Engineered slabs sized for Class M 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
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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
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Fatima Al-Rashid
Liverpool, NSW
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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.
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Other Buildana services in Longueville
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Longueville 2066. Lane Cove Council regulations and local controls are covered on each page.