Palm Beach Home Extension Builder — Live In, Build On
Buildana extends homes across Palm Beach 2108 while you stay in place. 1920s–1960s heritage + Sydney School modernist + premium contemporary-era structure, Northern Beaches Council rules, weatherproofing during build — all managed locally from Fairfield.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Palm Beach costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Northern Beaches Council approvals, and construction under one fixed-price contract.
Palm Beach Home Extensions — Fixed Price
A home extension in Palm Beach adds to houses that matter — heritage weekenders, Sydney School modernism and contemporary architecture on 600 to 2,500m² blocks between ocean and Pittwater.
The additions that succeed extend the original architecture, the steep sandstone is engineered through, and BAL and hazard zonings are mapped block by block.
In the $8M to $30M+ market, conservation-grade execution is the baseline, not the upgrade.
We build these fixed-price, licence HBL 487805C. Bring us the house and we will design an addition worthy of it.
Buildana manages the complete home extension process in Palm Beach — 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 Palm Beach from $150K
- Northern Beaches Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone — structural engineering included
- 1920s–1960s heritage + Sydney School modernist + premium contemporary-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near B-Line bus terminus at Mona Vale (12 km, then connecting bus) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The architecture leads
Palm Beach's houses — weekenders, modernist, contemporary — deserve additions in their own language, and the peninsula's review culture expects exactly that.
The design conversation precedes the structural one on every job here.
Serious ground, engineered
Steep sandstone, flame-zone edges, hazard-mapped beachfront — every constraint is engineered through at the standard the market demands.
Every one of those constraints is costed up front, not discovered mid-build.
Home extension builder in Palm Beach — key facts
- Suburb
- Palm Beach, NSW 2108
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 600–2,500m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $8M–$30M+ (oceanfront/Pittwater)
- Home era
- 1920s–1960s heritage + Sydney School modernist + 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. Palm Beach homes from the 1920s–1960s heritage + Sydney School modernist + 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
Every Buildana home extension in Palm Beach is delivered under a fixed-price contract — from design consultation through to defect-free handover.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $119,000 – $260,000 |
| Moderate extension (multiple openings, roof extended) | $260,000 – $500,000 |
| Complex extension (structural steel portals, re-roofing) | $500,000 – $790,000 |
| Second-storey tie-in (existing house re-engineered) | $460,000 – $860,000 |
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.
Start a Palm Beach Home Extension
Free design consultation for Palm Beach 2108. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Palm Beach
Other Buildana services in Palm Beach
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Palm Beach 2108. Northern Beaches Council regulations and local controls are covered on each page.