Home Extension Builder St Ives — Approved in 60 Days
St Ives 2075 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Ku-ring-gai Council in 40–60 days. Construction 12–24 weeks depending on scope.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in St Ives 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.
St Ives Home Extensions — Fixed Price
A home extension in St Ives is bushland work, and the first honest question is whether to extend at all. The stock is 1960s to 1980s on big 1,000 to 2,000m² blocks, and some of it has quietly reached the point where extending is throwing money at a house that wants replacing. I run that comparison with you before anything is drawn.
Where the wing wins — and on sound bones it usually does — those blocks give it room few suburbs can match. The catch here is the trees: preservation orders sit on virtually every lot, so the arborist report joins the DA from day one, planned rather than discovered halfway through.
At a $2.6M to $3.8M median, a wing on a house worth keeping beats the cost of upsizing inside the same school run, which is what keeps families building here.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the arborist planned, before you commit.
Buildana manages the complete home extension process in St Ives — 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 from $150K
- Ku-ring-gai Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M soil — structural engineering included
- 1960s–1980s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — 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
The honest fork, first
St Ives' 1960s to 1980s stock genuinely splits — homes with the bones for a generous wing, and homes that have reached the replacement point where extending is money misplaced. I run both numbers before you commit either way.
Where the wing wins, the 1,000 to 2,000m² blocks give it room few suburbs can offer.
Trees planned from day one
Tree preservation orders sit on virtually every lot, so the arborist report joins the DA from the start rather than surfacing as a mid-project problem.
That, and any fabric handling the older homes need, is priced into the job from the outset.
Home extension 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
- $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.
How It Works
From First Call to Final Key
Extension feasibility comes down to two things: what the existing structure can carry, and what Ku-ring-gai Council will let you build. We assess both at the consultation — no point designing for a second storey if the slab can't take the load.
⏱Extension designed to integrate with your existing St Ives home — matching roof lines, materials, and flow between old and new sections. Floor plans, elevations, and 3D renders.
⏱All approval documentation prepared: structural drawings, BASIX, shadow analysis, stormwater, and statement of environmental effects (if DA). Lodged and managed through to Construction Certificate.
⏱Extension construction takes 3–6 months on average. Footings excavated and poured to match existing depth on Class M soil, frame stand, roof tie-in (most weather-critical phase), lock-up, then internal fit-out at the same standard as the existing house.
⏱Defect-free inspection, OC issued, 6-year warranty on all new work. Junction between old and new sections waterproofed and warranted. Maintenance guide covers care of new and existing areas.
⏱Quality Promise
Buildana's St Ives home extension process: assess the existing structure, design the addition, approve, build. Fixed price throughout.
Cost Guide
| Item | Estimated Range |
|---|---|
| Single-room addition (bedroom/study) | $75,000 – $180,000 |
| Kitchen/living extension | $190,000 – $440,000 |
| Master suite + ensuite addition | $160,000 – $350,000 |
| Second storey (full or partial) | $350,000 – $690,000 |
| Multi-room ground floor wrap | $440,000 – $750,000 |
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
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 April 2026
Extend, Don't Move — St Ives
Free design consultation for St Ives 2075. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in St Ives
Other Buildana services in St Ives
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in St Ives 2075. Ku-ring-gai Council regulations and local controls are covered on each page.