Hargrave SIP Build

A faster, smarter way to build
book your free consultation
High-performance garden rooms, annexes, home offices and extensions using Structural Insulated Panels (SIPs) - designed for faster build times, better thermal performance and a more efficient route to completion.

Build faster. Live sooner.

Hargrave SIP Build offers a modern alternative to traditional construction. Using Structural Insulated Panels (SIPs), we deliver high-quality structures that are faster to install, highly insulated, energy efficient and built to last.

Whether you're planning a garden room, home extension, annexe or full new build, SIPs offer a smarter way to build, with less time on site, less disruption and faster progress from day one.

Why choose SIPs?

• Faster build times
• Excellent thermal performance
• Less on-site disruption
• Highly durable construction
• Low-maintenance, long-life structures
• Manufactured in the UK
• A more efficient route from build to finish
book your free consultation

What can we build?

Gym rooms

Hobby rooms

Cinema rooms

Studios

Beauty treatment rooms

Golf simulators

If you can design it, SIPs can build it.

Built for speed, built to last

Our SIP structures can be made weathertight in as little as 5 days, allowing internal works to begin far sooner than traditional build methods. That means:

• Faster progress on site
• Reduced programme time
• Earlier use of your new space
• Less disruption to your home

A faster build should never mean a compromise in quality. With Hargrave SIP Build, it doesn’t.

Planning a Garden Room, Annexe or Home Office?

Whether you’re exploring ideas for a garden room, annexe, home office or extension, we’d be happy to discuss your project.

We’ll help you understand:

• Whether SIP construction is right for your project

• Likely build costs

• Expected build times

• Planning and design considerations

We’re currently discussing projects across Kent, the South East and London.

Start your project conversation

Fill out your details in the form and we’ll be happy to discuss your project.