Licensed Home Extension Builder Mays Hill
NSW licensed extension specialist. Mays Hill 2145 extensions on 1950s–1970s-era homes require structural sign-off, Class M footings, and matched connection — we engineer and document properly.
HIA Member
MBA NSW0476 300 300Quick Answer
A home extension in Mays Hill costs $150,000–$600,000+. Rear extension from $150K, second-storey addition from $300K. Buildana manages design, Cumberland City Council approvals, and construction under one fixed-price contract.
Second-Storey & Rear Additions in Mays Hill
A home extension in Mays Hill trades almost entirely on where it sits — right on the doorstep of the Parramatta CBD, wedged between the city and Merrylands. The post-war homes on standard blocks here are worth lifting to match that position, because the address is doing a lot of the heavy lifting for value already. A rear wing turns a modest post-war house into something that actually suits the location.
That said, the house still has to be worth the spend. Brick with sound footings takes the wing; tired fibro gets the rebuild numbers laid out instead. Any fibro we run into as the work opens up is removed under licence before framing goes in, and the new footings are engineered to your ground.
At a $1.0M to $1.3M median the position makes staying and building an easy argument. The addition is designed so the original and the new part sit level and move together.
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 Mays Hill — 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 Mays Hill from $150K
- Cumberland City Council DA and CDC approvals managed
- Ground floor, rear and second-storey additions
- Class M soil — 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 Westmead (1 km) station
Reviewed by Oliver Alameri
Licensed Builder (NSW 487805C) · Master of Property Development · PhD Student · Building across Western Sydney since 2010
The address earns the wing
Sitting between Parramatta and Merrylands keeps demand for Mays Hill real, and a rear wing — extra bedrooms, a second living room, a rear that finally matches the street — makes the house worthy of where it stands.
I lay out the honest rebuild comparison first if the original is too tired to carry the work.
Fibro and footings, sorted first
Fibro exposed during the build is stripped out under a licensed strip-out before any new framing, handled properly rather than left in place.
The footings are engineered to the ground your house sits on, and both that and the strip-out are inside the fixed price from the start.
Home extension builder in Mays Hill — key facts
- Suburb
- Mays Hill, NSW 2145
- Council / LGA
- Cumberland City Council (Cumberland City)
- Primary zoning
- R2 Low Density & R3 Medium Density
- Typical lot size
- 450–650m²
- Soil class
- Class M
- Median house price
- $1.0M–$1.3M
- 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
Everything that has to be right before we touch the ground. We assess your Mays Hill home — existing structure, block size (450–650m²), R2 Low Density & R3 Medium Density 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 Mays Hill home's streetscape. Multiple design options presented.
⏱The Mays Hill construction phase. Fixed price, programmed, supervised. Documentation pack covers structural engineering for the new footings sized to match existing depths on Class M 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 M soil, structural connection to existing home, frame, fit-out, and finishes. Weekly updates from your project manager.
⏱The job isn't done when the site's clean; it's done when you have keys, certificates and warranties. 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.
⏱Quality Promise
Every Buildana home extension in Mays Hill is delivered under a fixed-price contract — from design consultation through to defect-free handover.
Cost Guide
| Item | Estimated Range |
|---|---|
| Small rear extension (up to 30m²) | $93,000 – $190,000 |
| Medium rear/side extension (30–60m²) | $190,000 – $330,000 |
| Large ground-floor extension (60–100m²) | $330,000 – $520,000 |
| Second-storey addition (60–120m²) | $290,000 – $570,000 |
| Wrap-around (ground + 1st floor) | $520,000+ |
| Structural engineering & tie-in | Included |
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
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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 Mays Hill 2145. Cumberland City Council regulations and local controls are covered on each page.