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Ground Floor Additions Marsden Park – Practical Space Solutions for Family Homes

With over 20+ years’ experience in Sydney’s north-west, we transform homes to complement our client’s lifestyles and budgets.

At Keystone Building, we offer ground-floor additions in Marsden Park that help families create more space without the need to relocate. If your home feels crowded, a single-storey extension is a cost-effective way to add bedrooms, expand your living area, or extend your kitchen and bathroom. With over 20 years of experience in residential ground-floor additions across Western Sydney, our team understands how to deliver projects on time, within budget, and with minimal disruption.

Who We Are

We work closely with homeowners to design custom ground-floor extensions that connect seamlessly with your existing structure. Whether you need an open-plan living space, an en-suite, or a family entertainment area, we build with care and attention to detail. Most clients remain in their homes throughout construction thanks to our clean and safe building practices. With licensed builders for ground floor additions, you can trust us for clear pricing, professional management, and quality results.

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?

  • Local Expertise – Family-run builders based in Marsden Park, serving Western Sydney for decades.
  • Proven Specialists – Skilled in single-storey and second-storey additions.
  • Fixed-Price Contracts – No hidden costs, clear timelines, and penalties for late delivery.
  • Low Disruption – Many homeowners remain in their homes during the construction process.
  • Full Project Management – From council approvals to final handover.

Our focus is always on safe work sites, reliable communication, and durable finishes.

How We Can Help

Keystone Building offers a wide range of building and renovation solutions:

  • Ground Floor Additions & Single-Storey Extensions – Increase living space for growing families.
  • Second-Storey Additions – Add extra rooms without reducing your yard space.
  • Home Extensions & Renovations – Interior and exterior upgrades for a modern living experience.
  • Custom Home Builds – Tailored homes designed and constructed from scratch.
  • Kitchen & Bathroom Refits – Functional, modern updates with quality finishes.
  • Outdoor Structures – Decks, pergolas, and retaining walls.
  • Project Management & Approvals – Drafting, engineering, and council documentation.

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Our Process

Our building process is simple and transparent:

  1. Free Consultation – We discuss your ideas, needs, and budget to ensure a tailored solution.
  2. Design & Documentation – Drafting, engineering, and council approvals managed by us.
  3. Fixed Contract – Clear scope of work with set pricing and timelines.
  4. Construction Phase – Safe and clean sites; most clients stay at home while we work.
  5. Final Handover – Quality checks, finishes, and on-time delivery.

This approach ensures that your ground-floor home renovations are well-planned and stress-free.

Facts About Us

Keystone Building proudly delivers ground-floor additions and extensions across Western Sydney. From Marsden Park, we service nearby suburbs and beyond, ensuring local families have reliable building options.

We provide services in:

  • Campbelltown
  • Camden
  • Oran Park
  • Narellan
  • Harrington Park
  • Mount Annan
  • Liverpool
  • Penrith
  • Blacktown
  • Parramatta

Wherever you are in Western Sydney, our team brings experience and practical solutions.

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