A Spacious Garden Room with a Stylish Apex Roof

Glevum Garden Building


The Glevum is an exciting addition to our range, incorporating an apex roof with a maximum exterior height of 3ms. This allows more internal room, while still achieving height requirements for permitted development if 2 metres from boundaries.

The appealing look of this room is a great stylish addition to any garden.

Standard householder planning permission submission is included in the price if within 2 metres of boundaries.

All of our Glevum rooms can be built to a design and specification that meets your requirements and budget.

Our garden rooms can be adapted to create your perfect space and you can choose features that are included in both ranges.

Key Features

  • Apex Design Which is 3 Metres High
  • Glazed Front Aspect with French or Patio Doors
  • Commercial Grade Laminate Flooring
  • UPVC Glazing
  • Fully Insulated
  • 10 Year Insurance Backed Guarantee
  • Fully Decorated
  • Lights and Sockets Wired to Part P Regulations
DIY Version
Glevum Garden Rooms

Build Specification

We use 100mm insulated SIP panels in all of our garden rooms.

A structural insulated panel (SIP) is an insulating layer of rigid core insulation adhered to two layers of structural board. They are then pressed together under a uniform force until the glue has set, resulting in an extremely strong and thermally efficient SIP.

Our standard roof construction is SIPs, insulated and covered with an EPDM rubber membrane, which is incredibly strong and resistant. The rubber has a guarantee of 20 years with a life expectancy of 30 years plus.

Wood Finishes / External Cladding Options

Glevum Prices

All of our rooms can be built to the size and specification you require. We’ve shown example prices for set sizes to give you a guide. If the exact size you need isn’t here, please discuss your requirements with us and we’ll provide a cost for the size of garden room you’re looking for.

W x D x H
Cladding A Cladding B
4m x 3m £20,133.00 + VAT
£24,159.60 inc VAT
£21,133.00 + VAT
£25,359.60 inc VAT
4m x 3.5m £21,122.00 + VAT
£25,346.40 inc VAT
£22,122.00 + VAT
£26,546.40 inc VAT
5m x 3m £21,617.00 + VAT
£25,940.40 inc VAT
£22,617.00 + VAT
£27,140.40 inc VAT
5m x 3.5m £22,160.00 + VAT
£26,592.00 inc VAT
£23,160.00 + VAT
£27,792.00 inc VAT
6m x 3m £22,863.00 + VAT
£27,435.60 inc VAT
£23,863.00 + VAT
£28,635.60 inc VAT
6m x 3.5m £24,712.00 + VAT
£29,654.00 inc VAT
£25,712.00 + VAT
£30,854.00 inc VAT


  • Fully Decorated, Plaster-Boarded & Skimmed Interior Walls
  • SIP Panel Construction with 100mm Rigid Foam Insulation to Walls, Floor & Roof. (Panel Thickness 122mm)
  • Internal & External Cavities for Heat Control & Hidden Services
  • Internal Downlights
  • External Lights
  • 4 Twin Flush White Sockets
  • White Light Switches
  • Fuse Board
  • Anthracite Grey UPVC Glazing (White Internally)
  • Anthracite Grey UPVC Opening Window – 800mm x 600mm (White Internally)
  • Anthracite Grey Metal Roof Sheets
  • Commercial Grade Laminate Flooring
  • Ground Screw or Pad Foundations
  • Insulated Floor
  • Decked Step
  • Standard householder planning permission submitted if within 2 metres of boundaries
  • Fully Installed
  • Small Delivery Charge, Based on Postcode
  • 10 Year Structural Guarantee to Room
  • Insurance Backed Guarantee
Download Price List

Extras and Upgrades

We offer extras and upgrades to create the perfect garden room for your needs, whether you’re looking for additional workspace, a separate leisure area, a place for hobbies or a multi-functional room for a range of uses by all the family.




Acoustic Walls

Luxury Garden Building Payment Terms

Payment Terms

We offer structured terms to support you with the purchase of your garden room, with a four stage payment plan as follows:

Stage 1: £1,000 deposit to secure your order, built slot and installation date.

Stage 2: 35% of the total room cost due 4 weeks before your agreed installation date (this amount includes the £1,000 deposit already paid).

Stage 3: 55% of the total room cost will be due for payment once the room is on site and being installed, usually on Day 3 of the installation.

Stage 4: 10% of the total room cost is payable when the room has been fully completed. This is usually 4 weeks following completion of the installation, giving time to allow your room to settle and any post-installation issues to be addressed. When the final payment has been received, we will issue all the relevant certification and guarantees.

Download Price List
Ground Screws For Garden Room


Typically, we would expect you to need one of the three types of foundation for your garden room: pad, ground screws or existing/new concrete base.

Ground Screws

Galvanised pins that screw into the ground create a strong level platform for your garden room, offering a number of benefits:

  • Speed: ready to use, so same day installation
  • Strength: create a strong, solid base
  • Levelling: ideal for use on uneven ground
  • Unintrusive: causing less impact to tree roots and ground
  • Cost: less having to be spent on materials, time and labour

Pad Foundation:

Pad foundations are used where rocky conditions are found. We remove the topsoil, dig a hole out of the hard ground and back fill with a quick dry concrete to form a pad foundation. Our adjustable feet are then used to level off the base of the room.

Existing Hard Standing:

When a room is installed onto existing hard standing, our adjustable pads are used to level the base of the room.

Installed Garden Rooms

Our Service

We offer a complete service, which includes ground screw or pad foundations, installation and finishing, to the specification you’ve ordered.

Throughout your project, every stage will be managed by our experienced team, from discussing your requirements and suitable garden room models through to manufacturing at our purpose-built facility and installation and finishing on site.

Attention to detail, professionalism and customer service are at the heart of every project we deliver and we’re proud of our reputation for designing, manufacturing and installing stunning garden rooms, offices and pods built with SIPs.

All of our garden room models can be adapted for different needs and optional extras and upgrades can be specified.

Glevum Garden Building

What’s Included

As experienced garden room manufacturers and installers, we carry out the installation of your garden room for you. We will take care of every stage of your project, ensuring that it’s installed on time and on budget, to the highest of standards.

We have a straightforward pricing policy and there will never be any hidden extras. The only additions will be any upgrades and extras you may choose and the delivery charge, which is subject to your location.

The price of your room is dependent on size, finish and location and will be supplied as a quote and confirmed with your order and will include:

  • Installation
  • Finishes as per Your Specification
  • Ground Screw or Pad Foundation

Our Garden Rooms

Permissions & Important Information:

Planning Permission
Permitted Development
Outbuildings & Permitted Development
Price List
Terms & Conditions
Installed Home Office

Information and Guidance

We have a range of important information on our beautifully designed and built garden rooms, along with useful frequently asked questions.

Find Out More
Premier Studio Garden Room

How to Order from Us

If you would like to find out more, discuss a project you’re planning or request a quote, please call us on 01452 501455 or email us at [email protected].

Alternatively, please complete the enquiry form and we’ll be in touch.

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Case Studies

What Our Clients Think

I’m absolutely thrilled with the room

The build has gone better than I could have expected and I’m absolutely thrilled with the room. A lovely bunch of guys too. I can’t wait to have it finished and start to use it, it will certainly get a lot of use. Thank you again for such a fantastic addition to our home.

4m x 3m Garden Room installed in York

It looks totally amazing!

It looks totally amazing! Honestly. I wanted to go and have another look in the middle of the night (!)... they’re doing a great job. So, so happy with it.

6m x 3m Garden Room installed Wotton-under-Edge

We have been very impressed with all your workforce

We have been very impressed with all your workforce, they have all been very pleasant and helpful to deal with and have worked hard. Matt has worked hard today and done a splendid job finishing off, as far as he could go. Last, but not least, we must thank you, the lynchpin of the whole exercise, for your help and advice and quick replies. I sometimes thought you were operating by telepathy as the replies came back almost as soon as I’d pressed send on the questions.

6m x 4m Garden Room installed in Gloucester

I am delighted with the room and how efficiently everything was organised

Just to say I am delighted with the room and how efficiently everything was organised. It is going to be a great art space and I am looking forward to getting power linked up shortly.

3m x 2.5m Garden Room installed in Bath

We LOVE the Art Shed

We LOVE the Art Shed. Will send some images soon, I’m painting in it and running workshops, it’s perfect.

5m x 3m Garden Room installed in Stratford

Everyone, from the crew who did the initial build to the plasterer, electrician and painting team, were absolutely amazing

I wanted to take the opportunity to thank you and all the team who installed our garden office at the end of November. I was delighted that EVERYONE from the crew who did the initial build (in just two days!), to the plasterer (a true "old school " artisan!) and the electrician and painting team were absolutely amazing, VERY professional, cheerful, quick and left the site very tidy indeed! I really appreciated their flexibility and attention to detail too.

4m x 3m Garden Room installed in Chichester