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
Duplex in Northwood is effectively impossible — Heritage Conservation Areas cover virtually all blocks. Realistic advice is extension/restoration on tightly-held heritage character.
On the ground in Northwood (2066), the practical numbers shape every duplex development. Class M (sandstone ridges) / H–E (river fall) soil — extremely reactive clay — pushes engineered foundation work into the $45,000–$80,000 bracket on most 600–1,400m² blocks. R2 Low Density / R3 Medium (Lane Cove village) zoning under Lane Cove Council sets the building envelope, with R3 Medium Density pockets that open up dual occupancy options on qualifying lots. Median sale price across Northwood sits at $4.0M–$8.0M, which frames the build-versus-buy decision from the start. Nearest rail is Wollstonecraft (3 km, ferry from Longueville), and that proximity affects everything from rental demand to construction site access.
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
- 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 (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
Why Build a Duplex in Northwood?
Northwood is the small harbour-fall enclave between Longueville and Greenwich on Woodford Bay. Federation mansions and inter-war heritage on 600–1,400m² blocks. Heritage Conservation Areas cover virtually all streets. Sandstone-dominant with substantial harbour fall. Premium for protected harbour outlook and tightly-held character.
Northwood's established streetscape and median house prices of $4.0M–$8.0M 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 (3 km, ferry from Longueville) connects Northwood to the wider Sydney network. Dual occupancy is well-established in Northwood's R3 zones. Minimum lot size for duplex: 550m². Soil conditions in Northwood (Class M (sandstone ridges) / H–E (river fall), extremely reactive) are factored into every Buildana foundation design.
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 Northwood — key facts
- Suburb
- Northwood, 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
- $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
Building in Northwood — Local Context
Foundations & Slab Design for Northwood
Northwood's ground is extremely reactive clay (Class M (sandstone ridges) / H–E (river fall)). On a 600–1,400m² block, that translates to engineered slab work in the $45,000–$80,000 bracket for a duplex. 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.
Planning Controls in Northwood
Northwood is zoned R2 Low Density / R3 Medium (Lane Cove village) with R3 Medium Density pockets. Lane Cove Council controls FSR, height limits (typically 8.5–9m), site coverage, landscaped area minimums, and setbacks. For a duplex, the binding constraints on most 600–1,400m² blocks here are: front setback (around 4.5–6m), side setbacks (1.0–1.5m articulated), rear (3–6m depending on lot depth), and landscaped area (usually 35–40%). Buildana's design team works to those numbers from the first sketch — no late re-design when council comes back with comments.
Cost vs Value in Northwood
Median sale price in Northwood is $4.0M–$8.0M. For a duplex, the decision tree runs through three numbers: build cost, expected post-completion value, and how long you plan to hold. Duplex builds in Lane Cove cost $750K–$1.5M total and typically sell at $1.35M–$1.85M per dwelling — net margin sits in the $200K–$500K range after holding costs and contributions, depending on Torrens vs strata title. We map this in feasibility before you commit.
Building to Suit Northwood
Northwood's R2 Low Density / R3 Medium (Lane Cove village) zoning, 600–1,400m² blocks, and 1880s–1940s heritage housing stock set the design context. For a duplex, the practical implications: dual occupancy designs need to fit two dwellings within an envelope that doesn't dominate single-dwelling neighbours — articulation, materials, and roof form do most of the work. Buildana's design phase resolves all of this before you commit to construction pricing.
Building Activity in Northwood Right Now
Northwood 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 Northwood
Strata vs Torrens in Northwood: Torrens is cleaner if your block supports the subdivision (typically needs 550m² or larger), and each dwelling sits on its own lot. Strata is the fallback when Torrens isn't feasible — still separately saleable but with shared structure title. Buildana draws both options into the initial feasibility.
Rental yield analysis for Northwood: attached duplexes typically rent about 95% of what a detached would — the cost saving on construction (roughly $200K–$300K less than detached) usually outweighs the rental difference. For investors, attached is almost always the better play unless the land premium supports detached.
Northwood vs Nearby Suburbs
Northwood vs nearby suburbs — key metrics for building a duplex.
| Suburb | Median Price | Typical Lot | Soil Class | Min Duplex Lot | Station |
|---|---|---|---|---|---|
| Northwood2066this suburb | $4.0M–$8.0M | 600–1,400m² | Class M (sandstone ridges) / H–E (river fall) | 550m² | Wollstonecraft (3 km, ferry from Longueville) |
| Longueville2066 | $3.5M–$7.5M | 600–1,400m² | Class M (sandstone ridges) / H–E (river fall) | 550m² | Wollstonecraft (4 km, ferry) |
| Greenwich2065 | $3.5M–$8.0M | 500–1,200m² | Class M (sandstone ridges) / H–E (river fall) | 550m² | Wollstonecraft (1.5 km, ferry) |
| 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.
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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 / R3 Medium (Lane Cove village) 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
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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.
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