Home Extension Builder Holroyd — From $150K Fixed Price
Fixed-price home extensions in Holroyd 2142. Rear extension $150K–$300K, second storey $300K–$500K. Cumberland City Council approvals managed. Free site consult.
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A home extension in Holroyd costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Cumberland City Council approvals, and construction under one fixed-price contract.
Holroyd Home Extensions — Fixed Price
A home extension in Holroyd puts the cost of moving into rooms instead. This quiet residential suburb runs post-war housing on standard blocks with backyard depth, and sitting between the Merrylands and Granville centres, it holds the kind of location owners would rather improve than leave. A rear addition adds the living space and bedroom a growing household needs without the exit fees.
The post-war stock extends best rearward. The era's framing suits ground-floor additions and resists second storeys without significant steel, so out is the standard call, and the block depth makes it easy. Where the older homes carry fibro, sheeting and eaves can hold asbestos, so our strip-out package includes licensed removal and clearance certification as standard.
What I would check first on your Holroyd house: the frame type, any asbestos in older fibro, and the rear yard depth. Those set the safe, priced scope.
We build these fixed-price, licence HBL 487805C. Get us out for a look before you talk to an agent.
Buildana manages the complete home extension process in Holroyd — 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 Holroyd from $150K
- Cumberland City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M soil — structural engineering included
- 1950s–1970s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Merrylands (1.5 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Improve the location you hold
This quiet suburb runs post-war housing on standard blocks with backyard depth, and sitting between the Merrylands and Granville centres, it holds a location owners would rather improve than leave.
A rear addition adds the living space and bedroom a growing household needs without the exit fees of moving.
Out, and asbestos handled
The post-war framing suits ground-floor additions and resists second storeys without significant steel, so out is the standard call and the block depth makes it easy.
Where the older homes carry fibro, sheeting and eaves can hold asbestos, so our strip-out package includes licensed removal and clearance certification as standard.
Home extension builder in Holroyd — key facts
- Suburb
- Holroyd, NSW 2142
- Council / LGA
- Cumberland City Council (Cumberland City)
- Primary zoning
- R2 Low Density & R3 Medium Density
- Typical lot size
- 450–650m²
- Soil class
- Class M
- Median house price
- $1.0M–$1.3M
- Home era
- 1950s–1970s
- 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
Free consultation at your Holroyd home. We inspect the existing structure, check Cumberland City 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.
⏱CDC (10–15 business days) or DA through Cumberland City 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 Holroyd.
⏱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.
⏱Quality Promise
Holroyd home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
Cost Guide
| Item | Estimated Range |
|---|---|
| Single-room addition (bedroom/study) | $62,000 – $140,000 |
| Kitchen/living extension | $150,000 – $360,000 |
| Master suite + ensuite addition | $130,000 – $290,000 |
| Second storey (full or partial) | $290,000 – $570,000 |
| Multi-room ground floor wrap | $360,000 – $620,000 |
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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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
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Fatima Al-Rashid
Liverpool, NSW
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Last updated: 1 April 2026
Extend, Don't Move — Holroyd
Free design consultation for Holroyd 2142. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Holroyd
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Holroyd 2142. Cumberland City Council regulations and local controls are covered on each page.