Home Extension North Curl Curl — Design, Approval, Structural, Build
Full-service extensions in North Curl Curl 2099: structural survey of existing 1920s–1960s heritage + premium contemporary home, design, Northern Beaches Council approval, engineering, weatherproofed construction, matched finish to original dwelling.
HIA Member
MBA NSW0476 300 300Second-Storey & Rear Additions in North Curl Curl
Half the houses in North Curl Curl are one storey short of an ocean view, and their owners know it. A first-floor home extension on the suburb's Federation beach houses and post-war brick — sitting on 450–800m² blocks a walk from the sand — is the defining local project, and in a $2.8M–$5.5M+ market it's also the highest-value one. The eastern streets especially reward going up.
Heritage Conservation Area coverage on the older streets means front-facing changes get council's attention, so successful additions here set the new level back from the street line and keep the original cottage face intact — a discipline that also happens to look better. Beachfront lots inside the coastal hazard zone need specific engineering. Salt-grade materials throughout, no exceptions. Talk through your street's rules with us early.
Buildana manages the complete home extension process in North Curl Curl — 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 North Curl Curl 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 + 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 (Brookvale interchange) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
One storey short of the ocean
North Curl Curl's defining project is the set-back first floor — the level that claims the ocean the original beach houses never did, and in a $2.8M to $5.5M+ market, the highest-value build available.
The eastern streets in particular reward a second storey.
Discipline that passes review
The HCA watches the frontages, so the new level sets back and keeps the cottage face — a discipline that also looks better. Beachfront hazard-zone lots get specific engineering, and salt-grade materials are non-negotiable.
The hazard engineering and the salt-grade spec are both in the quote up front.
Home extension builder in North Curl Curl — key facts
- Suburb
- North Curl Curl, NSW 2099
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 450–800m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.8M–$5.5M+ (oceanfront)
- Home era
- 1920s–1960s heritage + 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.
Quality Promise
Our North Curl Curl home extensions connect old-to-new cleanly. Matched brickwork, tied roofline, no awkward transitions.
How It Works
From First Call to Final Key
We assess your North Curl Curl home — existing structure, block size (450–800m²), R2 Low zoning, setbacks, FSR, and your space requirements. You'll know what's achievable before spending on detailed design.
⏱Design phase covers the extension layout, junction with existing structure, window and door placement, and external finish to match your North Curl Curl home's streetscape. Multiple design options presented.
⏱Documentation pack covers structural engineering for the new footings sized to match existing depths on Class Hawkesbury Sandstone soil, BASIX 2025 compliance, shadow diagrams to neighbours' POS, hydraulic, and detailed sections through the wall-tie junction. Approval-grade, not concept-grade.
⏱Fixed-price construction of your extension. New footings engineered for Class Hawkesbury Sandstone soil, structural connection to existing home, frame, fit-out, and finishes. Weekly updates from your project manager.
⏱Handover documentation covers the new work specifically — OC for the extension, structural certs, BASIX certificate updates, and warranty for the new section plus the junction detailing. Existing house remains under whatever warranty position applied before.
⏱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
Extend, Don't Move — North Curl Curl
Free design consultation for North Curl Curl 2099. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in North Curl Curl
Other Buildana services in North Curl Curl
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in North Curl Curl 2099. Northern Beaches Council regulations and local controls are covered on each page.