Ground Floor Additions Gregory Hills – Custom Extensions for Your Home
Who We Are
At Keystone Building, we specialise in ground floor additions in Gregory Hills that provide your family with more living space without the need to move. Whether you need extra bedrooms, a larger kitchen, or an open-plan living area, our team has the experience to design and deliver practical solutions. With over 20 years in home extensions across Western Sydney, we know how to build efficiently, meet council requirements, and keep projects on budget.
Preserve Outdoor Space
Build vertically to maintain your backyard, garden, or pool area— ideal for smaller blocks.
Add Views and Light
Second levels can open up elevated outlooks and bring in more sunlight, enhancing both value and lifestyle.
Get More Privacy
Create spacious master suites or quiet study areas completely separated from the main living zone.
Boost Property Value
Second storey additions are a strong investment, often delivering a higher return by substantially increasing usable floor area.
Why Us?
- Family-Owned Builders – Based in Gregory Hills, with decades of local experience.
- Specialists in Additions – Focused on single-storey and second-storey extensions.
- Transparent Pricing – Fixed-price contracts with no hidden costs.
- Minimal Disruption – Stay in your home while we work.
- Complete Service – From plans and approvals to handover.
Our reputation is built on quality artistry, reliable timelines, and respectful trades.
About Our Services
Keystone Building delivers a full range of building and renovation services, including:
- Ground Floor Additions & Single-Storey Extensions – Create more room for living, dining, or entertaining.
- Second Storey Additions – Add extra bedrooms and space without losing your backyard.
- Home Extensions & Renovations – Tailored Updates Inside and Out.
- Custom Home Builds – From design to completion.
- Kitchen & Bathroom Refits – Practical Upgrades with Modern Finishes.
- Outdoor Structures – Decking, pergolas, and retaining walls.
- Project Management – Approvals, engineering, and trade coordination.
Our Process
We follow a structured process to keep your project simple and stress-free:
- Initial Consultation – Free meeting to discuss your ideas and budget.
- Design & Planning – Our team arranges drafting, engineering, and council approvals.
- Fixed Contract – Detailed pricing with timelines and penalty clauses for delays.
- Construction – Safe, clean worksites where you can usually stay in your home.
- Finishes & Handover – Final touches, inspections, and delivery on time.
This step-by-step method ensures that your ground-floor home renovations are smooth and predictable.
