Licensed Home Extension Builder Kellyville Ridge
NSW licensed extension specialist. Kellyville Ridge 2155 extensions on 2000s–2010s-era homes require structural sign-off, Class M footings, and matched connection — we engineer and document properly.
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MBA NSW0476 300 300Quick Answer
A home extension in Kellyville Ridge costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, The Hills Shire Council approvals, and construction under one fixed-price contract.
Extending Homes in Kellyville Ridge
A home extension in Kellyville Ridge is often a genuine line-ball call, and we will tell you so honestly. This 2000s to 2010s master-planned suburb sits on 400 to 700m² R2 lots with contemporary brick and rendered homes that have decades of structural life left, so a rework or a modest rear addition frequently beats a large extension on the numbers. The case for a bigger build opens when a household genuinely outgrows the footprint.
Where it does stack up, the fundamentals hold. The contemporary stock extends cleanly at ground level, the Wianamatta Shale soil behaves so footings stay routine, and at a $1.4M to $1.9M median in a strong young-family market, reinvestment holds its value. Tighter master-planned blocks mean the rear addition has to be efficient, with every square metre earning its place.
What I would check first on your Kellyville Ridge house: whether the footprint truly needs extending over reworking, and how much the compact rear yard can take. Those decide the scope.
We build these fixed-price, licence HBL 487805C. Ask us for the honest extend-or-rework read first.
Buildana manages the complete home extension process in Kellyville Ridge — 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 Kellyville Ridge from $150K
- The Hills Shire Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 2000s–2010s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Bus to Kellyville Metro (2 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
An honest read on modern stock
This 2000s to 2010s master-planned suburb sits on 400 to 700m² R2 lots with contemporary homes that have decades of life left, so a rework or modest rear addition often beats a large extension on the numbers.
The case for a bigger build opens when a household genuinely outgrows the footprint, and we say so honestly rather than defaulting to the biggest job.
Efficient where the numbers stack up
The contemporary brick and rendered stock extends cleanly at ground level, the Wianamatta Shale soil behaves, and at a $1.4M to $1.9M median in a strong young-family market, reinvestment holds its value.
Tighter master-planned blocks keep the rear addition efficient, with every square metre earning its place.
Home extension builder in Kellyville Ridge — key facts
- Suburb
- Kellyville Ridge, NSW 2155
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 400–700m²
- Soil class
- M
- Median house price
- $1.4M–$1.9M
- Home era
- 2000s–2010s
- 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 |
|---|---|
| Single-room addition (bedroom/study) | $59,000 – $140,000 |
| Kitchen/living extension | $150,000 – $340,000 |
| Master suite + ensuite addition | $130,000 – $270,000 |
| Second storey (full or partial) | $270,000 – $540,000 |
| Multi-room ground floor wrap | $340,000 – $590,000 |
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 Kellyville Ridge home with our designer and structural engineer. We measure, photograph, and check the bones — footings, frame condition, roof structure. The cost estimate that follows is grounded in what we found, not a generic per-m² number.
⏱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 Kellyville Ridge qualify for CDC — cleaner, faster, no neighbour notification. Second-storey additions typically need DA through The Hills Shire Council because of overshadowing and privacy assessments. We choose based on your design, not on what's easier to lodge.
⏱Extension built from new footings to completion — connecting structurally to your existing home. Class M soil design managed. Temporary weatherproofing maintains liveability where possible.
⏱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. Maintenance guide provided.
⏱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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Other Buildana services in Kellyville Ridge
Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Kellyville Ridge 2155. The Hills Shire Council regulations and local controls are covered on each page.