Licensed Home Extension Builder Sydenham
NSW licensed extension specialist. Sydenham 2044 extensions on 1880s–1930s + industrial-era homes require structural sign-off, Class M footings, and matched connection — we engineer and document properly.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Sydenham costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Inner West Council approvals, and construction under one fixed-price contract.
Extending Homes in Sydenham
Sydenham is a small suburb about to matter more. The Metro conversion put it on Sydney's fastest rail line, and the redevelopment around the station upgrade is repricing everything nearby. For owners of the 1880s to 1930s terraces and cottages on 150 to 400m² blocks, that is the argument for a home extension now: adding space to a landholding the infrastructure keeps revaluing beats selling into the change.
The build itself follows inner-west terrace rules: rear extensions behind heritage-pocket frontages, party wall agreements, materials through the house when side access does not exist. Former industrial parcels carry contamination histories that get checked before anyone digs. It is exacting work on tight ground, and it is work we know well.
What I would check first on your Sydenham block: the heritage pocket status, side access or lack of it, and any industrial contamination history before excavation. Those decide how it all proceeds.
We build these fixed-price, licence HBL 487805C. Ask us what your block can take before the Metro effect finishes pricing you into it.
Buildana manages the complete home extension process in Sydenham — 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 Sydenham from $150K
- Inner West Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1880s–1930s + industrial-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Sydenham Metro/T3 (in suburb) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Extend before the reprice finishes
The Metro conversion put Sydenham on Sydney's fastest rail line, and the redevelopment around the station upgrade is repricing everything nearby.
For owners of the 1880s to 1930s terraces and cottages on 150 to 400m² blocks, adding space to a landholding the infrastructure keeps revaluing beats selling into the change.
Inner-west terrace rules
The build follows the familiar pattern: rear extensions behind heritage-pocket frontages, party wall agreements, and materials through the house where side access does not exist.
Former industrial parcels carry contamination histories, checked before anyone digs. It is exacting work on tight ground, and we know it well.
Home extension builder in Sydenham — key facts
- Suburb
- Sydenham, NSW 2044
- Council / LGA
- Inner West Council (Inner West)
- Primary zoning
- R1/R2 General/Low
- Typical lot size
- 150–400m²
- Soil class
- M
- Median house price
- $1.5M–$2.4M
- Home era
- 1880s–1930s + industrial
- 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) | $57,000 – $130,000 |
| Kitchen/living extension | $140,000 – $330,000 |
| Master suite + ensuite addition | $120,000 – $270,000 |
| Second storey (full or partial) | $270,000 – $520,000 |
| Multi-room ground floor wrap | $330,000 – $570,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Walk through your Sydenham home with our designer and structural engineer. We measure, photograph, and check the bones — footings, frame condition, roof structure. The cost estimate that follows is grounded in what we found, not a generic per-m² number.
⏱Our designer works with your existing home's layout — connecting new living areas to existing rooms, matching materials and roof pitch, and maximising natural light. You approve floor plans and 3D renders before we proceed.
⏱Most rear extensions in Sydenham qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through Inner West Council because of overshadowing and privacy assessments. We choose based on your design, not on what's easier to lodge.
⏱Extension built from new footings to completion — connecting structurally to your existing home. Class M soil design managed. Temporary weatherproofing maintains liveability where possible.
⏱Walk through the completed extension, confirm finishes, collect your OC. Six-year structural warranty covers all new work including the junction with your existing home. Maintenance guide provided.
⏱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
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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.
Sydenham Extension — Free Consultation
Free design consultation for Sydenham 2044. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Sydenham
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Sydenham 2044. Inner West Council regulations and local controls are covered on each page.