Home Extension Builder South Turramurra — From $150K Fixed Price
Fixed-price home extensions in South Turramurra 2074. Rear extension $150K–$300K, second storey $300K–$500K. Ku-ring-gai Council approvals managed. Free site consult.
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A home extension in South Turramurra 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.
South Turramurra Home Extensions & Additions
A home extension in South Turramurra is an engineering job before it is a design one, and the reason is the ground. This is Lane Cove valley country, and the clay grades reactive where the land deepens — so the wing's footing junction starts from a geotech report, not an assumption, because that is the discipline that keeps a valley addition from cracking a couple of winters on.
Get that right and the rest is a pleasure. The 800 to 1,500m² blocks take generous wings, and the forest edge at Browns Forest rewards a design that opens toward the green. The heritage-era fabric gets licensed lead and asbestos handling where the work touches it.
At a $2.8M to $4.2M median, a wing beats the cost of upsizing out of a quiet cul-de-sac pocket that long-stay families rarely want to leave.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the geotech done, before you commit.
Buildana manages the complete home extension process in South Turramurra — 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 South Turramurra from $150K
- Ku-ring-gai Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M–H soil — structural engineering included
- 1920s–1960s (heavy heritage stock)-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Turramurra (2 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The valley sets the engineering
South Turramurra's valley clay grades reactive where the ground deepens, so the wing's junction is engineered off a geotech report before any slab — the discipline that keeps valley additions crack-free for good.
The forest-edge setting rewards a wing opened toward the green.
Fabric handled properly
The heritage-era fabric gets licensed lead and asbestos handling wherever the work touches it.
That, and the engineered valley junction, are priced into the job from the outset.
Home extension builder in South Turramurra — key facts
- Suburb
- South Turramurra, NSW 2074
- Council / LGA
- Ku-ring-gai Council (Ku-ring-gai)
- Primary zoning
- R2 Low Density
- Typical lot size
- 800–1,500m²
- Soil class
- Class M–H
- Median house price
- $2.8M–$4.2M
- Home era
- 1920s–1960s
- 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 |
|---|---|
| Single-room addition (bedroom/study) | $72,000 – $170,000 |
| Kitchen/living extension | $180,000 – $420,000 |
| Master suite + ensuite addition | $160,000 – $340,000 |
| Second storey (full or partial) | $340,000 – $660,000 |
| Multi-room ground floor wrap | $420,000 – $720,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
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 South Turramurra 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–H 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.
⏱Our Team
Oliver Alameri
Founder / Director / Builder · MPropDev · PhD Student
Ahmad Alameri
Accounts Manager
Claire Wendell
Project Manager
Estimate Your Build Cost
Use our free calculator to get an instant cost estimate for your project
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
We Build Across Sydney
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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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in South Turramurra 2074. Ku-ring-gai Council regulations and local controls are covered on each page.