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Configure your Grosfillex 3D Shed and visualise it in your garden!
The app lets you position your shed virtually at the place you want to build it in your garden. Use your smartphone or tablet in your garden! This makes it easy to take measurements on site. You can also take photos and send them via email to your friends or local authorities for planning permission if required.
Convenient links will point you to our website https://www.grosfillex.com where you will find assembly videos, manuals and a FAQ section.

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We will contact you within 3 business days for delivery within 14 business days from the date of your order (excluding weekends and bank holidays). Postcode restrictions may apply. Find out more in the Delivery & Returns Tab below


This Grosfillex Deco PVC garden building is designed to grace your outdoor space for many years. The unique design allows for a virtually maintenance free outdoor building, requiring only the occasional wash down with warm water and a soft brush. This building is easily installed onto a prepared concrete slab or timber deck base (not included). The fixings supplied ensure the building will withstand all the elements and all the panels are extruded in the highest quality UV resistant resin so they will not fade or crack in the sunlight.

This building offers increased internal space with the benefit of adding a covered external area to the front. This deco building is perfect for a summer house and will make a great addition to any garden. 


  • Material: PVC and metal window frames
  • Inside surface area: 16.2m2 + 3.07m2 outside terrace
  • Outside surface area required: 19.87m2
  • Assembly required: 2-3 people, approx. 2 days
  • Floor Included: No
  • Weight: 450kg
  • Dimensions: H 3.03 x W 4.93 x D 4.03 m

Please check contents, footprint and measurements before installation. If you are enlisting the help of a third party to install this product, please ensure that all contents have been received in full and undamaged prior to arranging and paying for installation to take place. If you have damaged or missing parts, please contact our Customer Care team at: customercare@costco.co.uk

Premium Installation Service:

Choose our Premium Installation Service with your chosen shed and enjoy the comfort of knowing that installation is taken care of by skilled and trained installers.
The installation office will contact you to guide you smoothly through the process and ensure you are happy with your purchase.
Prior to booking your install date (within 10 working days of delivery) the installers will telephone you to check the following:
1. That you have a suitable base for your shed. It needs to be firm, flat & level. We recommend concrete, slabs or a timber frame. Please note that your shed cannot be placed directly onto a base of grass, earth, sand etc as natural movement will affect the stability of the building.
2. That there is enough space to build your chosen shed and that access to the build area is clear of obstruction. A minimum of 24” (61cm) space is needed around the shed for the installers to work in.
3. That the contents have been checked in full and free from damage.
4. Please note that the installation company is unable to carry the shed through your home so if there is not adequate access, provision for this must be made. Please note that the installation service does not include the removal of packaging, but will leave it tidily for the member to dispose of.

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