Home Extension Builder Beaumont Hills — From $150K Fixed Price
Fixed-price home extensions in Beaumont Hills 2155. Rear extension $150K–$300K, second storey $300K–$500K. The Hills Shire Council approvals managed. Free site consult.
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MBA NSW0476 300 300Quick Answer
A home extension in Beaumont Hills 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.
Second-Storey & Rear Additions in Beaumont Hills
A home extension in Beaumont Hills gets the honest read first — the 1990s-2000s homes are reaching the age where a targeted wing genuinely adds, but many floor plans here already work and do not need $200K thrown at them.
Where the addition earns its place — a rear family room, a ground-floor suite for parents — the 500 to 800m² blocks hold it, and the shale junctions are engineered.
At the $1.7M to $2.5M median, the right wing beats the friction of upsizing within The Ponds corridor.
We build these fixed-price, licence HBL 487805C. Walk me through what you need and I will read it straight.
Buildana manages the complete home extension process in Beaumont Hills — 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 Beaumont Hills from $150K
- The Hills Shire Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- M — structural engineering included
- 1990s–2000s-era homes assessed for extension suitability
- Connect new to existing — clean, matched finish
- 6-year structural warranty
- Free design consultation — near Bus to Rouse Hill Metro (3 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
Only where it earns its place
Beaumont Hills' homes are young enough that I sometimes advise against the big extension — a targeted wing, a suite, an opened rear often does the job at half the spend.
Where the family has genuinely outgrown the plan, the blocks hold a proper addition.
Junctions engineered
The Wianamatta clay moves seasonally, so new footings are engineered to move with the originals at the junction.
The engineering and the wing are costed together in the quote, not itemised as surprises later.
Home extension builder in Beaumont Hills — key facts
- Suburb
- Beaumont Hills, NSW 2155
- Council / LGA
- The Hills Shire Council (The Hills)
- Primary zoning
- R2 Low
- Typical lot size
- 500–800m²
- Soil class
- M
- Median house price
- $1.7M–$2.5M
- Home era
- 1990s–2000s
- 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 |
|---|---|
| Small rear extension (up to 30m²) | $90,000 – $180,000 |
| Medium rear/side extension (30–60m²) | $180,000 – $320,000 |
| Large ground-floor extension (60–100m²) | $320,000 – $500,000 |
| Second-storey addition (60–120m²) | $280,000 – $550,000 |
| Wrap-around (ground + 1st floor) | $500,000+ |
| Structural engineering & tie-in | Included |
Prices are indicative for Western Sydney (2025). Actual costs depend on site, specifications, and approvals.
How It Works
From First Call to Final Key
Everything that has to be right before we touch the ground. Walk through your Beaumont Hills 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.
⏱The Beaumont Hills construction phase. Fixed price, programmed, supervised. Most rear extensions in Beaumont Hills 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.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. 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
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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
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Costs, approval pathway and fixed-price contract detail for every other build type we deliver in Beaumont Hills 2155. The Hills Shire Council regulations and local controls are covered on each page.