Designed, Delivered, and Installed

Insulated Garden

The UK’s leading insulation installers are bringing their expertise to your back garden. Our ultra-modern garden rooms are designed for comfort and built to last, installed in just one day.
Experience the joy of a home away from home, no matter the season. With our QuadCore technology, your garden room will be just as comfortable as your house, providing a versatile space for work, play, or relaxation.

A Room For Every Occasion

Your lawn and patio are just the beginning. Transform your garden into a home office away from the 9-to-5, a bar for good times with friends, or a summerhouse primed to soak up the sun. Whatever your vision, we have the insulated garden room to match.

Insulated Garden Offices

Tired of working from the kitchen table? Our insulated workspaces offer a comfortable environment filled with natural light and fresh air – the perfect place to focus. No more commuting, no more distractions – just a peaceful, productive environment.

Insulated Garden Bars

Bring the pub home; transform your garden into a custom-built garden bar. Our insulated designs ensure year-round comfort, meaning you can enjoy your favourite drinks and good company no matter the weather.

Insulated Summer Houses

Forget cramped, damp, wooden designs – our fully insulated, modern summer houses are a year-round retreat. Sleek finishes, comfortable temperatures, and ample space create the perfect pool house, entertainment hub, or hideaway.

Choose a Style

The Snug

Micro Garden Room

  • Fully Insulated
  • Dimensions: 3.3 x 2.2m
  • Starting Price: £12,999 + VAT

The Studio

Mini Garden Room

  • Fully Insulated
  • Dimensions: 4.4m x 3.3m
  • Starting Price: £13,393 + VAT

The Lodge

Small Garden Room

  • Fully Insulated
  • Dimensions: 5.5m x 3.3m
  • Starting Price: £15,305 + VAT

The Lodge Plus

Medium Garden Room

  • Fully Insulated
  • Dimensions: 6.6m x 3.3m
  • Starting Price: £16,077 + VAT

The Retreat

Large Garden Room

  • Fully Insulated
  • Dimensions: 5.5m x 4.4m
  • Starting Price: £16,439 + VAT

The Retreat Plus

Extra-Large Garden Room

  • Fully Insulated
  • Dimensions: 6.6m x 4.4m
  • Starting Price: £16,722 + VAT

The Estate

XXL Garden Room

  • Fully Insulated
  • Dimensions: 7.7m x 3.3m
  • Starting Price: £22,999 + VAT


Fixtures And Fittings

Make your garden office your own. From industry-leading insulation to elegant French doors and sturdy double handles, our standard models offer the essentials for a comfortable and productive environment. Want to upgrade? See our options below, or browse our free online brochure.

Standard Inclusions

  • QuadCore Insulation (Roof, Wall,and Floor Panels)
  • Mains Connection Ready* (2x Power Outlets)
  • Standard Double French Doors
  • 2x Standard French Door Handles
  • Floor Boarding

Optional Add-Ons:

  • RADIX Ground Screw Foundation (see brochure to learn more)
  • Heating and Air Conditioning
  • Woodgrain Effect Composite Decking
  • Additional Power Outlets
  • Premium Bifold Doors
  • 2x Premium Handles
  • Finished Flooring
  • Internal Lighting
  • External Lighting
Download Free Brochure

Why Choose an RJ Insulated Garden Room?

At RJ Insulation, we know garden rooms. Why settle for less when you could have more?

Which? Approved Garden Room Installer

You may be wondering if our service is truly trustworthy. To assuage any concerns, several TrustMark organisations have glowingly approved our service. RJ Insulation is a Which? Trusted Trader and Trading Standards Approved.

Full list of organisations that we are members of, or have been approved by:

  • Which?
  • PAS
  • Trading Standards 
  • British Assessment Bureau
  • Qualitymark Protection
  • IWA Deposit and Guarantee Protection
  • BBA
  • AECB
  • The Retrofit Academy

Our Process


Download a Free Brochure

Immerse yourself in the possibilities with detailed photos of our garden room range, finishes, fixtures, and fittings. Explore dimensions and starting prices to get your project planning underway


Reach Out to Our Team

Have a vision in mind? Share it with us over the phone. We’ll gather essential details about your site and requirements and will be happy to make recommendations aligned with your needs.


Virtual Site Survey

Immediately following your call, our team will use satellite imagery technology and your provided information to recommend the ideal garden room type, size, and placement. We’ll even discuss foundation options if needed.


Get an Estimated Quotation

Receive a comprehensive and accurate estimated quotation of within a couple of hundred pounds, detailing your garden room specifics, standard inclusions, additional work (if any), and a projected timeline.


Assessor Visit and Sign-Off

Once you’re happy with the quotation, give us the green light, and we’ll confirm a date for our Assessor to visit your home to undertake a RAMS (risk assessment and method statement), and confirm the price to the penny. Upon a signed completion of the paperwork and paid deposit, we’ll start the manufacturing process.


Manufacturing and Delivery

Your garden room will be constructed using premium materials, including steel facing, QuadCore insulation, and double-glazed doors. Expect delivery within 4-6 weeks.


(Optional) Foundation Laying

Whilst you’re waiting for delivery, If needed, our team will efficiently install a durable timber-suspended base using ground screws, designed to support even the most demanding uses.


1-Day Install

Once your foundation is ready, our expert team will have your garden room fully assembled and weatherproofed within a single day.



It’s time to relax, create, and make the most of your garden room. Add furniture and decor, and have an electrician connect it to mains electricity if needed.

Case Studies

Discover RJ Insulation Projects

Sheep Wool Loft Insulation Installation in Bures

This customer lived in a 12th-century cottage in Bures with a freezing cold loft. He came to us looking for a natural, s [...]
Learn More

SuperFOIL Loft Insulation Installation in Welton

This SuperFOIL loft insulation installation took a 1960s home into the new millennium, boosting both efficiency and comf [...]
Learn More

Recycled Plastic Loft Insulation Installation in Chelmsford

These customers had a lovely, modern mid-terrace house. They wanted to get rid of all their old fibreglass in favour of [...]
Learn More

Customer and Which? Testimonials

Both our previous customers and the accreditors at Which? have given us glowing feedback! We are very grateful to have been given so many well-earned 5-star reviews.

Get Started with an RJ Garden Room

Ready to book a call or start your garden room project? Download our brochure to see our full range, or fill in the contact form for a callback

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    Garden Room FAQs

    Our garden rooms are designed with permitted development in mind, so you usually won’t need planning permission. That’s the case for most houses, even in protected areas like conservation areas or areas of outstanding natural beauty. But, if you live in a flat or a listed building, the rules are different – you’ll always need planning permission.

    Our garden rooms are typically designed to meet permitted development guidelines, with heights ranging between 2.48m and 2.5m.

    Generally, if your garden room is positioned more than 2 metres away from any boundary, you can have a flat roof up to 2.5 metres high or a pitched roof up to 3 metres high. However, if your garden room is within 2 metres of a boundary, the maximum permitted height is 2.5 metres, regardless of the roof type.

    Our garden rooms are designed to suit a variety of budgets and needs. Our starting prices, inclusive of VAT, are as follows:

    • The Snug: Micro Garden Room, 3.3 x 2.2m, £17,146 inc. VAT
    • The Studio: Mini Garden Room,  4.4m x 3.3m, £19,890 inc. VAT
    • The Lodge: Small Garden Room, 5.5m x 3.3m,  £24,480 inc. VAT
    • The Lodge Plus: Medium Garden Room, 6.6m x 3.3m, £26,350 inc. VAT
    • The Retreat: Large Garden Room, 5.5m x 4.4m, £27,200.00 inc. VAT
    • The Retreat Plus: Extra Large Garden Room, 6.6m x 4.4m, £27,880.00 inc. VAT
    • The Estate: XXL Garden Room, 7.7m x 3.3m, £27,818 inc. VAT

    These prices provide a starting point. Your final cost will depend on your chosen finishes, fixtures, and any additional features or customisation. Contact our team for an estimated quotation today.

    Unlike most garden room providers, we believe insulation is a must-have, not an afterthought. Our insulation experts understand the importance of year-round comfort, which is why every garden room we offer comes fully insulated as standard.

    We don’t just insulate the walls; we go the extra mile, ensuring your floor and ceiling are protected with leading QuadCore technology. This means your garden room stays warm in winter, cool in summer, and comfortable all year round, no matter the weather outside.

    We’ve already done the hard work for you. Your new garden room arrives with two power sockets, neatly recessed into the floor and wired for mains electricity (if you require more outlets, we’re happy to install them as an option at your request). This means it’s ready for you to connect to the grid, eliminating the need for messy extension cables or relying on battery-powered devices.

    All that’s left is to call in a qualified electrician to complete the final hookup and safely connect your garden room to your home’s electrical system.