Dual Occupancy Specialists Northwood — Licensed Duplex Builder
NSW licensed duplex builder in Northwood 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 Northwood 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.
Dual Occupancy Developments in Northwood
A duplex in Northwood is almost never the play, because near-total heritage coverage and a premium harbour market favour a single home. This small harbour-fall enclave on 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 virtually all streets, so a dual-occupancy is precluded on contributory lots. At a $4.0M to $8.0M market a single premium residence is the honest call in a tightly-held enclave.
The sandstone-dominant soil and harbour fall mean deep rock and engineered retaining, so a duplex would double a very high site cost. 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 Northwood 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 Northwood — 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 Northwood from $750K
- Lane Cove Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 550m² in Northwood
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Wollstonecraft (3 km, ferry from Longueville) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Near-total heritage, premium harbour
This small harbour-fall enclave on Woodford Bay runs Federation mansions and inter-war heritage on 600 to 1,400m2 blocks.
Conservation Areas cover virtually all streets, so a dual-occupancy is precluded on contributory lots, at a $4.0M to $8.0M market.
Deep rock and retaining
The sandstone-dominant soil and harbour fall mean deep rock and engineered retaining across both dwellings.
A duplex would double a very high site cost, so a single home is the honest call, with older fibro stripped under licence.
Duplex builder in Northwood — key facts
- Suburb
- Northwood, 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
- $4.0M–$8.0M
- 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
Site visit, title search, and planning assessment for your Northwood block. We check lot dimensions against Lane Cove Council's minimum (550m²), review overlays, drainage, access, and services. You get a clear yes/no on duplex feasibility plus estimated yield.
⏱Design has to satisfy four audiences at once: Lane Cove Council, the future buyer or tenant, the certifier, and you. Each pull in a different direction — our job is to land plans that work for all four. Solar access, privacy, parking, POS, FSR, all balanced.
⏱We lodge and chase your approval — DA through Lane Cove Council for most duplexes, or CDC where eligible. R2 Low Density zoning in Northwood. CC issued, conditions cleared, ready to build.
⏱Building both sides in parallel halves the loan interest holding cost vs sequential builds. Bulk material orders for cabinetry, tiles, fixtures cut unit cost. Single site setup, single supervisor, single insurance period — efficiency compounds across the whole programme.
⏱Strata or Torrens title subdivision completed. Separate OCs, individual metering, 6-year structural warranty per dwelling. Strong rental demand near Wollstonecraft (3 km, ferry from Longueville).
⏱Quality Promise
Northwood dual occupancy construction: feasibility assessment first, then fixed-price build to dual handover. No surprises.
Cost Guide
| Item | Estimated Range |
|---|---|
| Attached duplex (side-by-side) | $980,000 – $1,430,000 |
| Attached duplex (stepped/offset) | $1,170,000 – $1,630,000 |
| Detached duplex (two fully separate dwellings) | $1,560,000 – $2,080,000 |
| Luxury detached duplex | $2,080,000+ |
| Party-wall acoustic & fire upgrade | Included |
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
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
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
Headquartered in Western Sydney's Fairfield. Active across all 28 metropolitan Sydney LGAs — from Penrith to the Eastern Suburbs, the Hills to the Sutherland Shire.
Last updated: 1 July 2025
Northwood Dual Occupancy — Free Feasibility
Free duplex feasibility assessment for Northwood 2066. We'll check your block, estimate yield, and provide a fixed-price budget.
Start Your ProjectMore in Northwood
Other Buildana services in Northwood
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Northwood 2066. Lane Cove Council regulations and local controls are covered on each page.