Home Extension Builder Hillsdale — Approved in 60 Days
Hillsdale 2036 extensions with tight approval timelines. CDC where eligible (~15 days), DA via Randwick City Council in 40–60 days. Construction 12–24 weeks depending on scope.
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MBA NSW0476 300 300Quick Answer
A home extension in Hillsdale costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Randwick City Council approvals, and construction under one fixed-price contract.
Hillsdale Home Extensions & Additions
A home extension in Hillsdale runs about the gentlest maths in the eastern suburbs. It is post-war homes on 500 to 650m² blocks at the accessible end of the Randwick LGA, right beside Eastgardens, so a rear wing shifts value meaningfully for money that would not get you far closer to the beach.
The read on the house comes first: sound brick takes the wing, tired fibro gets a rebuild comparison rather than good money after bad, and the post-war fabric gets a licensed asbestos strip-out where the work opens it up. The sandstone underneath keeps the footings straightforward.
At a $1.6M to $2.5M median, the sums for staying are clear — you keep the Eastgardens amenity on the doorstep and add the space the post-war house was never built with.
We build these fixed-price, licence HBL 487805C. Ask us to measure what your block can hold.
Buildana manages the complete home extension process in Hillsdale — 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 Hillsdale from $150K
- Randwick City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — 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 Light Rail Kingsford (4 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The east's gentle entry grows
Hillsdale's accessible entry into the eastern suburbs makes a wing genuinely additive — bedrooms and living added beside Eastgardens' amenity, at a cost the median rewards.
If the original is too tired to carry the work, I put the rebuild comparison in front of you first.
Era and ground handled
Asbestos in the post-war fabric is stripped out under licence wherever the work opens it up.
The sandstone keeps footings straightforward, and every part of it is priced into the job from the outset.
Home extension builder in Hillsdale — key facts
- Suburb
- Hillsdale, NSW 2036
- Council / LGA
- Randwick City Council (Randwick)
- Primary zoning
- R2 Low
- Typical lot size
- 500–650m²
- Soil class
- M
- Median house price
- $1.6M–$2.5M
- 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
The first job on an extension is finding out what you're extending onto. Hillsdale homes from the 1950s–1970s were built to different standards — we open walls, check footings, verify load paths. The existing house has to carry the new work.
⏱Design follows the existing roof. A bad extension looks like a bolt-on; a good one reads as original. Matched brickwork or contrasting render (whichever the architecture calls for), tied-in roofline, continuous flooring where it should be continuous.
⏱Construction happens while you live in the house. That means weatherproofing every night, staging the works so kitchens and bathrooms don't disappear on the same week, and keeping the site clean of debris that doesn't belong in a family home.
⏱Finish is seamless. Paint match, floor match, roofline match, brick match where possible. The only way to tell the extension is new is the date on the plans.
⏱Quality Promise
Hillsdale home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $83,000 – $180,000 |
| Moderate extension (multiple openings, roof extended) | $180,000 – $350,000 |
| Complex extension (structural steel portals, re-roofing) | $350,000 – $550,000 |
| Second-storey tie-in (existing house re-engineered) | $320,000 – $600,000 |
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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Frequently Asked Questions
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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
Add Space to Your Hillsdale Home
Free design consultation for Hillsdale 2036. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Hillsdale
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Hillsdale 2036. Randwick City Council regulations and local controls are covered on each page.