Duplex Builder St Ives — CDC-Ready Designs, 15-Day Approval
St Ives 2075 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 St Ives costs $750,000–$1,500,000+ for dual occupancy construction. Attached duplex from $750K, detached from $1M. Buildana manages feasibility, Ku-ring-gai Council approvals, construction and subdivision under one fixed-price contract.
St Ives Dual Occ. — Feasibility to Handover
A duplex in St Ives is one of the few genuine dual-occupancy opportunities in Ku-ring-gai, because the blocks are big enough. The 1960s to 1980s stock sits on large 1,000 to 2,000m² blocks, so many clear the council's high 1,200m² dual-occupancy minimum that rules out most of the LGA. The catch is the trees: tree preservation orders sit on virtually every lot, and every DA needs an arborist report.
There is no train, bus only, which keeps prices a touch below the rail-line suburbs while the schools and amenities stay equal. The sandstone-influenced ground behaves once geotech is in, with rock excavation possible. Where an older home carries fibro, a licensed asbestos strip-out leads the demolition.
What I check first on your St Ives block: whether it clears the 1,200m² minimum, the arborist and tree constraints on siting the two dwellings, and the depth to rock. Those decide the play.
We build fixed-price, licence HBL 487805C. Get our site-yield feasibility before you commit.
Buildana manages the full duplex development process in St Ives — 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 St Ives from $750K
- Ku-ring-gai Council DA and CDC approvals managed
- R2 zoning — eligible under July 2024 reform
- Minimum lot size 1,200m² in St Ives
- Class M soil — engineered dual-slab design included
- Strata or Torrens title subdivision available
- 6-year structural warranty per dwelling
- Free feasibility check — near Pymble (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Big enough for a duplex, unlike most of Ku-ring-gai
Ku-ring-gai's 1,200m² dual-occupancy minimum rules out most of the LGA, but St Ives is the bushland half with genuinely large blocks. At 1,000 to 2,000m², many clear that high bar, which makes St Ives one of the real duplex pockets on the upper north shore. The survey check still leads, because not every block reaches 1,200m², but on a qualifying parcel a duplex is on the table.
The bus-only access keeps St Ives land a touch cheaper per m² than the rail-line suburbs, while the schools and the St Ives Village amenities stay equal. That is a genuine value angle for a duplex here.
Trees run the siting
Tree preservation orders sit on virtually every St Ives lot, and every DA needs an arborist report. On a duplex that matters, because significant trees can dictate where the two dwellings, their driveways and their separation can go, and you design around the canopy rather than clearing it. On these large blocks there is usually room to do it well, but it takes real site planning against the arborist report. That is exactly what our feasibility maps before you commit.
Duplex builder in St Ives — key facts
- Suburb
- St Ives, NSW 2075
- Council / LGA
- Ku-ring-gai Council (Ku-ring-gai)
- Primary zoning
- R2 Low Density
- Typical lot size
- 1,000–2,000m²
- Soil class
- Class M
- Median house price
- $2.6M–$3.8M
- Home era
- 1960s–1980s
- 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
Everything that has to be right before we touch the ground. Free feasibility check on your St Ives block. We measure frontage width, confirm zoning (R2 Low Density), check minimum lot size against 1,200m² requirement, and review Ku-ring-gai 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.
⏱The St Ives construction phase. Fixed price, programmed, supervised. DA through Ku-ring-gai Council (40–90 days) or CDC (10–15 business days). St Ives 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.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. 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.
⏱Quality Promise
Every Buildana duplex in St Ives is built under a fixed-price contract — feasibility through to dual handover and subdivision.
Cost Guide
| Item | Estimated Range |
|---|---|
| Attached duplex (2 × 180–220m²) | $940,000 – $1,250,000 |
| Attached duplex (2 × 220–260m²) | $1,250,000 – $1,630,000 |
| Detached duplex (2 × 220–280m²) | $1,500,000 – $1,940,000 |
| Strata/Torrens subdivision | $19,000 – $38,000 |
| Demolition (if KDR duplex) | $23,000 – $50,000 |
| Council contributions | $13,000 – $75,000+ |
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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Liverpool, NSW
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Last updated: 1 July 2025
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