Home Extension Builder Cherrybrook — From $150K Fixed Price
Fixed-price home extensions in Cherrybrook 2126. Rear extension $150K–$300K, second storey $300K–$500K. Hornsby Shire Council approvals managed. Free site consult.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Cherrybrook costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Hornsby Shire Council approvals, and construction under one fixed-price contract.
Extending Homes in Cherrybrook
A home extension in Cherrybrook reads the estate's age — the 1980s-1990s brick is well into extension territory as families outgrow it, while the newer premium stock gets the honest not-yet.
The 600 to 900m² blocks hold generous wings, the Metro keeps the finished homes in deep demand, and the junctions are engineered.
At the $2.4M to $3.4M premium median, the wing beats the friction of upsizing in the sought catchments.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the age read, before you commit.
Buildana manages the complete home extension process in Cherrybrook — 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 Cherrybrook from $150K
- Hornsby Shire Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone bedrock — structural engineering included
- 1980s–2010s + premium contemporary-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Cherrybrook (Sydney Metro Northwest) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The estate ages into it
Cherrybrook's earlier brick is well into the age extensions serve best — families that outgrew the original plan — while the newer premium homes get the honest not-yet.
The Metro and the catchments keep demand deep for the finished homes.
Generous blocks, engineered junctions
The 600 to 900m² blocks hold a proper wing, and the junctions are engineered where new meets old.
That junction engineering is in the quote up front.
Home extension builder in Cherrybrook — key facts
- Suburb
- Cherrybrook, NSW 2126
- Council / LGA
- Hornsby Shire Council (Hornsby Shire)
- Primary zoning
- R2 Low Density predominant
- Typical lot size
- 600–900m²
- Soil class
- Hawkesbury Sandstone bedrock
- Median house price
- $2.4M–$3.4M premium master-planned
- Home era
- 1980s–2010s + premium contemporary
- 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. Cherrybrook homes from the 1980s–2010s + premium contemporary 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
Buildana's Cherrybrook home extension process: assess the existing structure, design the addition, approve, build. Fixed price throughout.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $90,000 – $200,000 |
| Moderate extension (multiple openings, roof extended) | $200,000 – $380,000 |
| Complex extension (structural steel portals, re-roofing) | $380,000 – $600,000 |
| Second-storey tie-in (existing house re-engineered) | $350,000 – $650,000 |
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
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
Explore Related Topics
Cherrybrook Extension — Free Consultation
Free design consultation for Cherrybrook 2126. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Cherrybrook
Other Buildana services in Cherrybrook
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Cherrybrook 2126. Hornsby Shire Council regulations and local controls are covered on each page.