Home Extension Builder Clareville — From $150K Fixed Price
Fixed-price home extensions in Clareville 2107. Rear extension $150K–$300K, second storey $300K–$500K. Northern Beaches Council approvals managed. Free site consult.
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MBA NSW0476 300 300Quick Answer
A home extension in Clareville 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.
Second-Storey & Rear Additions in Clareville
A home extension in Clareville serves the beach-lane quiet — 1920s-1970s homes on 600 to 1,500m² blocks beside Pittwater's calmest sand, extended in the enclave's understated language.
Foreshore lines apply at the water, BAL ratings on the vegetated edges, and marine-grade materials are standard — with the design kept quiet because that is the suburb's whole point.
In the $3.5M to $10M+ waterfront market, the understated addition done exactly is what the enclave rewards.
We build these fixed-price, licence HBL 487805C. Walk us over the block and we will design around it.
Buildana manages the complete home extension process in Clareville — 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 Clareville from $150K
- Northern Beaches Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone — structural engineering included
- 1920s–1970s + 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 to CBD (Avalon interchange) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Quiet is the standard
Clareville's premium is its understatement — and the addition holds it: quiet forms, natural materials, living opened to the water without shouting at the lane.
The generous blocks give the designs room to stay calm.
Water and bush conditions
Foreshore lines cap the water-side push, BAL ratings shape the vegetated edges, and marine-grade materials are standard down at the tideline.
All of it is mapped into the price before we start.
Home extension builder in Clareville — key facts
- Suburb
- Clareville, NSW 2107
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 600–1,500m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $3.5M–$10M+ (waterfront)
- Home era
- 1920s–1970s + 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.
Cost Guide
| Item | Estimated Range |
|---|---|
| Adding a master suite (1920s–1970s + premium contemporary Clareville home) | $160,000 – $340,000 |
| Kitchen/living open-out to backyard | $180,000 – $430,000 |
| Second storey for teenagers/office | $340,000 – $670,000 |
| Extension + bathroom (growing family) | $240,000 – $490,000 |
| Full rear + roof tie-in (entertainer's zone) | $430,000 – $730,000 |
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 Clareville home with our designer and structural engineer. We measure, photograph, and check the bones — footings, frame condition, roof structure.
⏱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 Clareville qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through Northern Beaches Council because of overshadowing and privacy assessments.
⏱Extension built from new footings to completion — connecting structurally to your existing home. Class Hawkesbury Sandstone soil design managed.
⏱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.
⏱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.
Last updated: 1 April 2026
Clareville Extension — Free Consultation
Free design consultation for Clareville 2107. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Clareville
Other Buildana services in Clareville
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Clareville 2107. Northern Beaches Council regulations and local controls are covered on each page.