Licensed Home Extension Builder Narraweena
NSW licensed extension specialist. Narraweena 2099 extensions on 1950s–1970s-era homes require structural sign-off, Class Hawkesbury Sandstone footings, and matched connection — we engineer and document properly.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Narraweena 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.
Extending Homes in Narraweena
A home extension in Narraweena grows the post-war home on the hill — 1950s-1970s stock on 500 to 750m² blocks where the fall opens district and ocean glimpses one level up.
The era fabric gets licensed handling, the junctions are engineered, and the beaches-adjacent entry keeps the maths generous.
At the $2.0M to $2.8M median, the wing — or the view level — beats the friction of upsizing coastward.
We build these fixed-price, licence HBL 487805C. Ask us to measure what your block can hold.
Buildana manages the complete home extension process in Narraweena — 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 Narraweena from $150K
- Northern Beaches Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone — structural engineering included
- 1950s–1970s-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
The hill gives options
Narraweena's fall opens glimpses one storey up on the right orientations — and where the block faces the water, the view level outearns the rear wing.
The flatter streets take generous ground-floor additions instead.
Era handled properly
Asbestos gets the licensed strip-out where the post-war fabric is disturbed, and the junctions are engineered.
Both are costed into the scope before the first cut.
Home extension builder in Narraweena — key facts
- Suburb
- Narraweena, NSW 2099
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 500–750m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.0M–$2.8M
- Home era
- 1950s–1970s
- 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. Narraweena homes from the 1950s–1970s 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
Our Narraweena home extensions connect old-to-new cleanly. Matched brickwork, tied roofline, no awkward transitions.
Cost Guide
| Item | Estimated Range |
|---|---|
| Simple rear extension (single wall removal, no roof change) | $96,000 – $210,000 |
| Moderate extension (multiple openings, roof extended) | $210,000 – $410,000 |
| Complex extension (structural steel portals, re-roofing) | $410,000 – $640,000 |
| Second-storey tie-in (existing house re-engineered) | $370,000 – $700,000 |
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
Add Space to Your Narraweena Home
Free design consultation for Narraweena 2099. We'll assess your home, design the extension, and provide a fixed-price quote.
Start Your ProjectMore in Narraweena
Other Buildana services in Narraweena
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Narraweena 2099. Northern Beaches Council regulations and local controls are covered on each page.