Home Extension Builder Strathfield — Approved in 60 Days
Strathfield 2135 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Strathfield Council in 40–60 days. Construction 12–24 weeks depending on scope.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Strathfield costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Strathfield Council approvals, and construction under one fixed-price contract.
Strathfield Home Extensions & Additions
A home extension in Strathfield is built to the heritage estate's standard — Federation mansions and inter-war Tudor on 550 to 1,000m² blocks, extended behind conserved frontages where the HCAs cover the grand streets.
The pre-war fabric gets licensed handling, the station-precinct R3/R4 gets the zoning check, and the conservation-grade market rewards the addition done exactly.
At the $3.0M to $5.5M heritage estate median, the wing protects a position rarely rebought.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with heritage and zoning checked, before you commit.
Buildana manages the complete home extension process in Strathfield — 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 Strathfield from $150K
- Strathfield Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1900s–1940s Federation mansion/Californian Bungalow heritage + inter-war Tudor + 2010s+ R3/R4 redevelopment around Strathfield/Homebush stations-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Strathfield station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The heritage estate's standard
Strathfield's grand Federation and Tudor homes extend behind their conserved frontages — wings that match the mansion's proportions and detail, because anything less devalues the estate.
The generous blocks give the design the room to do it right.
Heritage and zoning handled
The HCAs cover the grand streets, the station R3/R4 gets the value check, and lead paint joins asbestos on the pre-war fabric.
The heritage review, the zoning check and the licensed strip-out all sit in the quote up front.
Home extension builder in Strathfield — key facts
- Suburb
- Strathfield, NSW 2135
- Council / LGA
- Strathfield Council (Strathfield Council)
- Primary zoning
- R2 Low Density
- Typical lot size
- 550–1,000m² (premium Federation/inter-war heritage estate predominant); 250–500m² (Homebush/Homebush West/Strathfield South tighter terraces)
- Soil class
- M
- Median house price
- $3.0M–$5.5M heritage estate; $2.4M–$3.5M Homebush/Strathfield South; $1.8M–$2.6M Belfield
- Home era
- 1900s–1940s Federation mansion/Californian Bungalow heritage + inter-war Tudor + 2010s+ R3/R4 redevelopment around Strathfield/Homebush stations
- 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
Everything that has to be right before we touch the ground. On-site assessment of your 1900s–1940s Federation mansion/Californian Bungalow heritage + inter-war Tudor + 2010s+ R3/R4 redevelopment around Strathfield/Homebush stations-era home in Strathfield. We check structural condition, block dimensions (550–1,000m² (premium Federation/inter-war heritage estate predominant); 250–500m² (Homebush/Homebush West/Strathfield South tighter terraces)), setback availability, and Strathfield Council's DCP requirements. Written feasibility and cost estimate provided. Designing an extension is half about the new space and half about how it joins the old one. Doorway position, ceiling height transition, floor level matching, light wells — the junction makes or breaks how the finished home feels.
⏱The Strathfield construction phase. Fixed price, programmed, supervised. We lodge your extension approval — CDC for eligible designs or DA through Strathfield Council. Full documentation including structural engineering for Class M soil, BASIX, and shadow diagrams. CC issued before works start. For ground-floor rear extensions you usually stay in the house during the build, with temporary weatherproofing at the junction wall until the new section is locked up. Second-storey additions need a 4–8 week relocation during the roof-off and frame-up phase.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. Final inspection, Occupation Certificate, 6-year structural warranty. Your Strathfield home now has the space your family needs.
⏱Quality Promise
Every Buildana home extension in Strathfield is delivered under a fixed-price contract — from design consultation through to defect-free handover.
Cost Guide
| Item | Estimated Range |
|---|---|
| Small rear extension (up to 30m²) | $90,000 – $180,000 |
| Medium rear/side extension (30–60m²) | $180,000 – $320,000 |
| Large ground-floor extension (60–100m²) | $320,000 – $500,000 |
| Second-storey addition (60–120m²) | $280,000 – $550,000 |
| Wrap-around (ground + 1st floor) | $500,000+ |
| Structural engineering & tie-in | Included |
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
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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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Strathfield 2135. Strathfield Council regulations and local controls are covered on each page.