Licensed Home Extension Builder Forestville
NSW licensed extension specialist. Forestville 2087 extensions on 1950s–1980s + premium contemporary-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 Forestville 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 Forestville
A home extension in Forestville uses the Forest district's generosity — 1950s-1980s homes on 600 to 900m² blocks where the rear wing fits without crowding and the premium infill sets the bar.
BAL ratings apply on the reserve-backing lots, the era fabric gets licensed handling, and the junctions are engineered where new meets old.
At the $2.2M to $3.4M median, the wing beats the friction of upsizing across the district.
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 Forestville — 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 Forestville from $150K
- Northern Beaches Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Hawkesbury Sandstone — structural engineering included
- 1950s–1980s + 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 (Frenchs Forest interchange) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Room the district is known for
Forestville's blocks hold full family wings — second living, parents' suites, opened kitchens — with the post-war brick taking the additions confidently once engineered.
The premium replacements around you set a finish bar worth meeting.
Edges and era handled
BAL ratings shape the reserve-backing lots, and asbestos gets the licensed strip-out wherever the era fabric is disturbed.
The BAL materials and the strip-out both sit in the fixed price from the outset.
Home extension builder in Forestville — key facts
- Suburb
- Forestville, NSW 2087
- Council / LGA
- Northern Beaches Council (Northern Beaches)
- Primary zoning
- R2 Low
- Typical lot size
- 600–900m²
- Soil class
- Hawkesbury Sandstone
- Median house price
- $2.2M–$3.4M
- Home era
- 1950s–1980s + 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 (1950s–1980s + premium contemporary Forestville home) | $150,000 – $310,000 |
| Kitchen/living open-out to backyard | $170,000 – $390,000 |
| Second storey for teenagers/office | $310,000 – $620,000 |
| Extension + bathroom (growing family) | $220,000 – $450,000 |
| Full rear + roof tie-in (entertainer's zone) | $390,000 – $670,000 |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
On-site assessment of your 1950s–1980s + premium contemporary-era home in Forestville. We check structural condition, block dimensions (600–900m²), setback availability, and Northern Beaches Council's DCP requirements.
⏱Designing an extension is half about the new space and half about how it joins the old one. Doorway position, ceiling height transition, floor level matching, light wells — the junction makes or breaks how the finished home feels.
⏱We lodge your extension approval — CDC for eligible designs or DA through Northern Beaches Council. Full documentation including structural engineering for Class Hawkesbury Sandstone soil, BASIX, and shadow diagrams.
⏱For ground-floor rear extensions you usually stay in the house during the build, with temporary weatherproofing at the junction wall until the new section is locked up. Second-storey additions need a 4–8 week relocation during the roof-off and frame-up phase.
⏱Final inspection, Occupation Certificate, 6-year structural warranty. Your Forestville home now has the space your family needs.
⏱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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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Forestville 2087. Northern Beaches Council regulations and local controls are covered on each page.