St Ives Chase Home Extension Builder — Live In, Build On
Buildana extends homes across St Ives Chase 2075 while you stay in place. 1970s–1990s-era structure, Ku-ring-gai Council rules, weatherproofing during build — all managed locally from Fairfield.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in St Ives Chase costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Ku-ring-gai Council approvals, and construction under one fixed-price contract.
Extending Homes in St Ives Chase
A home extension in St Ives Chase is a bushfire job before it is a building job. This rural-residential pocket on the edge of Garigal National Park runs 1970s to 1990s homes on 1,200 to 3,000m² lots, many backing directly onto bushland reserves, and BAL ratings from 19 to flame zone apply across most of the suburb. That rating flows into every new external element and adds real cost, so it is priced in from the start, not discovered later.
The land itself is generous, so space is never the issue. A large ground-floor addition fits most blocks without touching the bush setback, and with this much room, going out beats going up on cost and disruption. Hawkesbury Sandstone means rock can turn up in the dig, so we test before pricing. At a $2.4M to $3.4M median, owners here are buying the land and the trees, and improving what they hold.
What I would check first on your St Ives Chase block: the BAL rating and RFS path, the sandstone under the addition, and the bush setback. Those shape the feasibility.
We build these fixed-price, licence HBL 487805C. Ask for a BAL-aware quote priced on a test dig.
Buildana manages the complete home extension process in St Ives Chase — from design consultation and structural engineering through to DA or CDC approval, and fixed-price construction to handover. Extend your home without the stress.
Read our Home Extension Cost Guide 2026 or explore extension approval pathways in NSW.
- Home extensions in St Ives Chase from $150K
- Ku-ring-gai Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M soil — structural engineering included
- 1970s–1990s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Mount Colah (4 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Bushfire comes first
This rural-residential pocket on the edge of Garigal National Park runs 1970s to 1990s homes on 1,200 to 3,000m² lots, many backing directly onto bushland reserves.
BAL ratings from 19 to flame zone apply across most of the suburb, flowing into every new external element and adding real cost, so it is priced in from the start.
Generous land, go out
A large ground-floor addition fits most blocks without touching the bush setback, and with this much room to spare, going out beats going up on cost and disruption.
Hawkesbury Sandstone means rock can surface in the dig, so we test before pricing. At a $2.4M to $3.4M median, owners are improving land they bought for the trees.
Home extension builder in St Ives Chase — key facts
- Suburb
- St Ives Chase, NSW 2075
- Council / LGA
- Ku-ring-gai Council (Ku-ring-gai)
- Primary zoning
- R2 Low Density
- Typical lot size
- 1,200–3,000m²
- Soil class
- Class M
- Median house price
- $2.4M–$3.4M
- Home era
- 1970s–1990s
- Typical price range
- $150,000 – $600,000+
- Typical timeline
- 6–12 months design to handover
- Approval pathway
- CDC for most rear extensions, DA for second-storey
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 |
|---|---|
| Small rear extension (up to 30m²) | $110,000 – $220,000 |
| Medium rear/side extension (30–60m²) | $220,000 – $390,000 |
| Large ground-floor extension (60–100m²) | $390,000 – $610,000 |
| Second-storey addition (60–120m²) | $340,000 – $670,000 |
| Wrap-around (ground + 1st floor) | $610,000+ |
| Structural engineering & tie-in | 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
Everything that has to be right before we touch the ground. Free consultation at your St Ives Chase home. We inspect the existing structure, check Ku-ring-gai Council's controls, measure available space, and discuss what you need. You get a clear scope, budget range, and timeline before committing. Two design moves are usually on the table: match the existing house so the extension reads as original, or contrast with it so the new section is clearly modern. Both work — choice is aesthetic, and we'll show 3D renders of both before you commit.
⏱The St Ives Chase construction phase. Fixed price, programmed, supervised. CDC (10–15 business days) or DA through Ku-ring-gai Council depending on scope. Structural engineering, BASIX, and all documentation prepared and lodged. Construction Certificate obtained. Construction phase connects new to existing — footings, frame, roof tie-in, waterproofing at junction, internal fit-out and external finish. Staged works minimise disruption to your daily routine in St Ives Chase.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Final inspection focuses on the integration: paint blend, flooring transitions, ceiling height, junction waterproofing, sound transmission. The extension shouldn't feel bolted on — it should feel like the house was always meant to be this size.
⏱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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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 April 2026
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