Duplex Builder Artarmon — CDC-Ready Designs, 15-Day Approval
Artarmon 2064 duplex specialists. Compliant design means CDC approval in ~15 business days, construction complete in 10–14 months. Feasibility within 48 hours.
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A duplex in Artarmon costs $750,000–$1,500,000+ for dual occupancy construction. Attached duplex from $750K, detached from $1M. Buildana manages feasibility, Willoughby City Council approvals, construction and subdivision under one fixed-price contract.
Dual Occupancy Developments in Artarmon
A duplex in Artarmon depends on the block and its heritage, on a tightly held pocket near Chatswood. The residential grid runs Federation, inter-war and post-war stock on 450 to 700m2 blocks, and on an eligible non-heritage lot clearing the Willoughby minimum a dual-occupancy is feasible. On a contributory heritage lot around Hampden Road the honest answer is a single sympathetic home.
Off the heritage streets the ground is a shale and sandstone mix, so footings are engineered off geotech and rock is priced honestly on both dwellings. The location near Chatswood supports the yield, but the block area and heritage status decide feasibility first, and I would rather confirm those than assume. Where the existing home carries fibro a licensed asbestos strip-out comes first.
What I would check first on your Artarmon block: the heritage status, whether the lot clears the minimum, and the rock. Those decide dual-occ versus single.
We build these fixed-price, licence HBL 487805C. Send me the address and I will tell you honestly whether it is a duplex site.
Buildana manages the full duplex development process in Artarmon — 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 Artarmon from $750K
- Willoughby City Council DA and CDC approvals managed
- R2 and R3 zones — established dual occ. provisions
- Minimum lot size 650m² in Artarmon
- M — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Artarmon station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Block and heritage decide
The residential grid runs Federation, inter-war and post-war stock on 450 to 700m2 blocks in a tightly held pocket near Chatswood.
On an eligible non-heritage lot clearing the Willoughby minimum a dual-occupancy is feasible; on a contributory heritage lot a single home is the answer.
Ground and rock
Off the heritage streets the ground is a shale and sandstone mix, so footings are engineered off geotech on both dwellings.
Rock on the sandstone pockets is priced honestly, and older fibro gets a licensed asbestos strip-out first.
Duplex builder in Artarmon — key facts
- Suburb
- Artarmon, NSW 2064
- Council / LGA
- Willoughby City Council (Willoughby)
- Primary zoning
- R2 Low Density
- Typical lot size
- 450–700m²
- Soil class
- M
- Median house price
- $2.6M–$3.6M
- Home era
- 1920s–1970s
- 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.
Cost Guide
| Item | Estimated Range |
|---|---|
| Attached duplex (side-by-side) | $900,000 – $1,320,000 |
| Attached duplex (stepped/offset) | $1,080,000 – $1,500,000 |
| Detached duplex (two fully separate dwellings) | $1,440,000 – $1,920,000 |
| Luxury detached duplex | $1,920,000+ |
| Party-wall acoustic & fire upgrade | Included |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Free feasibility check on your Artarmon block. We measure frontage width, confirm zoning (R2 Low Density), check minimum lot size against 650m² requirement, and review Willoughby City Council's DCP controls. Written feasibility report within 5 business days.
⏱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. We work the design until both sides feel like proper homes, not mirror-image apartments.
⏱DA through Willoughby City Council (40–90 days) or CDC (10–15 business days). Artarmon is zoned R2 Low Density. Construction Certificate obtained before works commence.
⏱Dual construction runs 9–14 months. Engineered slabs sized for Class M soil, simultaneous frame-up, staggered fit-out for efficiency. Your project manager coordinates all trades and inspections.
⏱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. Whatever the next owner or buyer asks for is in the file.
⏱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
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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 Artarmon 2064. Willoughby City Council regulations and local controls are covered on each page.