Licensed Home Extension Builder Balgowlah
NSW licensed extension specialist. Balgowlah 2093 extensions on 1900s–1940s + post-war + premium replacements-era homes require structural sign-off, Class Hawkesbury Sandstone footings, and matched connection — we engineer and document properly.
HIA Member
MBA NSW0476 300 300Balgowlah Home Extensions & Additions
A home extension in Balgowlah grows the village home — Federation and inter-war stock on 450 to 800m² blocks, extended behind conserved frontages in the heritage pockets while the post-war streets move freely.
The premium replacements around you set the finish bar, the pre-war fabric gets licensed handling, and the harbour-adjacent village holds every metre added.
At the $3.0M to $5M+ median, the wing beats trading out of the village position.
We build these fixed-price, licence HBL 487805C. Get our extension scope, with the heritage position checked, before you commit.
Buildana manages the complete home extension process in Balgowlah — 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 Balgowlah from $150K
- Northern Beaches Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone — structural engineering included
- 1900s–1940s + post-war + premium replacements-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 via Mosman station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The village bar is high
Balgowlah's premium replacements have lifted the finish standard — and the extension has to meet it: proportions, materials and detail that sit beside the new builds without apology.
The heritage pockets extend behind their conserved frontages; the post-war streets move freely.
Fabric handled properly
Lead paint joins asbestos on the pre-war fabric, licensed processes both.
Both come out under licence, and the cost sits in the quote from the outset.
Home extension builder in Balgowlah — key facts
- Suburb
- Balgowlah, NSW 2093
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 450–800m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $3.0M–$5M+
- Home era
- 1900s–1940s + post-war + premium replacements
- 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
Balgowlah home extension specialists: we work on your home while you live in it, weatherproof the site nightly, finish clean.
How It Works
From First Call to Final Key
We assess your Balgowlah 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 Balgowlah 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.
⏱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
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
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Balgowlah Extension — Free Consultation
Free design consultation for Balgowlah 2093. We'll assess your home, design the extension, and provide a fixed-price quote.
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Other Buildana services in Balgowlah
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Balgowlah 2093. Northern Beaches Council regulations and local controls are covered on each page.