Basebox garden rooms by Green Retreats are available in a range of sizes and finishes. Each building is individually crafted at our Buckinghamshire factory by our specially trained staff to your chosen specification.
Contact the team on 01296 328260 or email costco@greenretreats.co.uk who will be happy to help with your project.
Basebox: The most cost-effective quality garden room in the market. Working exclusively with Costco to offer their members an exclusive 10% discount.

Costco Member Benefits

10% Off
Exclusive to Costco Members

Receive an extra 2% reward (ex VAT)
when using your Executive membership card
What Our Customers Say
We are highly rated on Trust Pilot by our customers

The Latest Garden Rooms By Green Retreats
Basebox is the latest garden room design from Green Retreats, and takes over from Garden Studio as our most cost-effective quality garden room.
Garden Studio is now discontinued to make space for this new Basebox design which offers better value for money vs quality using the latest in innovative materials.
If you’re still looking for the Garden Studio designs we will be honouring orders for a limited time only. To see the details of the Garden Studio range from Green Retreats and Costco, please contact us.
Contact UsUse our 3D configurator to design your space
How to order your Basebox:
Step 1 - Visit the Costco website and select the building size you’re looking for
Step 2 - Fill out your details on the website to place your order
Step 3 - Contact us on 01296 328260 or costco@greenretreats.co.uk at your earliest convenience to confirm your order and to discuss any additions, delivery and your installation date
Get StartedFrom £8,799.99
Basebox is made with high-quality, value-engineered materials that offer a combination of luxury with cost-effectiveness for the perfect garden room solution suitable for any home.
Basebox's versatility makes it the ideal 'blank canvas' for your garden, allowing you to create a space perfectly tailored to your needs. Whether you need an office, gym or lounge, Basebox gives you the space to expand your home.

Basebox
With 10 different size configurations available, Basebox can accommodate any garden size. So, whether you need a cosy 2.4m x 2.4m garden office or a spacious 4.8m x 3.8 garden gym, Basebox covers your needs.
Inc. VAT Price
D W |
---|
2.4m |
3.6m |
2.4m | 3.0m | 3.6m | 4.2m | 4.8m |
---|---|---|---|---|
£8,799.99 Ex VAT | £10.599.99 Inc VAT | Item: 449280 |
£9,899.99 Ex VAT | £11,879.99 Inc VAT | Item: 449278 |
£10,699.99 Ex VAT | £12,839.99 Inc VAT | Item: 449279 |
£11,899.99 Ex VAT | £14,279.99 Inc VAT | Item: 461209 |
£12,499.99 Ex VAT | £14,999.99 Inc VAT | Item: 461212 |
£10,299.99 Ex VAT | £12,359.99 Inc VAT | Item: 449276 |
£11,799.99 Ex VAT | £14,159.99 Inc VAT | Item: 449277 |
£12,499.99 Ex VAT | £14,999.99 Inc VAT | Item: 449275 |
£13,999.99 Ex VAT | £16,799.99 Inc VAT | Item: 449273 |
£15,299.99 Ex VAT | £18,359.99 Inc VAT | Item: 449272 |
your space to…
… live, create, design, discover, build, relax, exercise, draw, invent, work, inspire, listen, dream, express, collaborate, escape, plan, play, watch, forget, entertain, paint, doodle…
Our Features
Delivery Is Included In Band 1
Delivery is calculated on distance from our factory and showroom located in HP18 0XB. Where we can, we include delivery within the cost of your building. Please see the map below for delivery charges.

Our Showrooms
See our new Basebox building for yourself by visiting our Bucks showroom! With 17 buildings on display in our indoor and outdoor showroom, visit us to see the quality of our garden rooms.
Costco