Dual Occupancy Specialists Narrabeen — Licensed Duplex Builder
NSW licensed duplex builder in Narrabeen 2101. Torrens or strata subdivision, Northern Beaches Council planning expertise, full contract management for investor-grade builds.
HIA Member
MBA NSW0476 300 300Dual Occupancy Developments in Narrabeen
A duplex in Narrabeen depends on where the block sits, because the beachfront carries a Coastal Hazard zone and lagoon-edge lots carry acid sulphate soils, while inland lots clear the Northern Beaches 600m2 minimum. This oceanfront and lagoon-edge suburb runs Federation beach houses, inter-war heritage and contemporary on 450 to 800m2 blocks, and direct beachfront is heavily constrained while Narrabeen Lagoon coastal acid sulphate soils affect lagoon-edge lots. On an inland lot off both a Torrens-title duplex can work, though the village Heritage Conservation Area adds a status check.
The ground is Hawkesbury Sandstone with rock excavation typical, so a duplex spreads that across two footprints, and lagoon-edge lots need acid sulphate soil management. On a qualifying inland non-heritage lot a side-by-side works cleanly. Where older homes carry fibro a licensed asbestos strip-out comes first.
What I would check first on your Narrabeen block: whether it sits in the Coastal Hazard zone or the lagoon acid sulphate soils, whether it clears the 600m2 minimum, and the rock. 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 Narrabeen — 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 Narrabeen from $750K
- Northern Beaches Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 600m² (Manly/Pittwater legacy R2) / 700m² (Warringah legacy R2) / varies by precinct under Northern Beaches LEP in Narrabeen
- Hawkesbury Sandstone — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near B-Line bus to CBD (Narrabeen interchange) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Beachfront and lagoon constraints
This oceanfront and lagoon-edge suburb runs beach houses, heritage and contemporary on 450 to 800m2 blocks, with a Coastal Hazard zone on the beachfront.
Narrabeen Lagoon acid sulphate soils affect lagoon-edge lots, while inland lots off both may clear the Northern Beaches 600m2 minimum.
Rock and heritage
The Hawkesbury Sandstone means rock excavation spread across both dwellings, with acid sulphate soil management on lagoon-edge lots.
The village Heritage Conservation Area adds a status check, with older fibro stripped under licence first.
Duplex builder in Narrabeen — key facts
- Suburb
- Narrabeen, NSW 2101
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 450–800m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.6M–$5.5M+ (oceanfront)
- Home era
- 1920s–1960s heritage + premium contemporary
- 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.
Quality Promise
We build duplexes in Narrabeen end-to-end — feasibility, design, DA/CDC, dual-slab construction, subdivision. One contract.
How It Works
From First Call to Final Key
Feasibility covers the planning side and the financial side. Yes-or-no on whether the block supports dual occupancy under Northern Beaches Council controls, plus indicative end values, build cost, and likely yield. The point is to kill bad sites before you spend on design — not after.
⏱Dual occupancy floor plans designed for your Narrabeen block — attached or detached configuration, vehicle access, private open space, and full Northern Beaches Council compliance.
⏱Full approval management: Statement of Environmental Effects, plans, reports, and all supporting documentation lodged with Northern Beaches Council or private certifier. We handle RFIs and conditions. CC follows.
⏱Construction follows a tight programme: dual slabs in one mobilisation, paired frame stand, simultaneous lock-up, then trades rotate between sides for fit-out so no day is lost waiting on availability. The schedule is engineered, not optimistic.
⏱Both dwellings handed over with individual Occupation Certificates. Subdivision lodged for separate titles. Separate metering installed. 6-year structural warranty per dwelling.
⏱Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
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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
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
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Last updated: 1 July 2025
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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Narrabeen 2101. Northern Beaches Council regulations and local controls are covered on each page.