Downtown Insulated Garden Room - 3m (W) x 3m (D)
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Downtown Insulated Garden Room

Item Number: 9000792081




from £5899.99
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With it's contemporary style and modular design the Downtown Insulated Garden Room will create a valuable room in your garden while keeping with the needs of modern living. This versatile garden building can be used as a summer house to entertain guests, an outdoor home office that's away from all the distractions or a guest annex to provide your guests with their own relaxing space while visiting. The Downtown Insulated Garden Room can be customised to best suit you and your home, with a variety of sizes and ironmongery available as standard and electric packs and treatments available at an additional charge you will be able to choose the perfect garden room for you.

To provide you with optimal levels of comfort the Downtown Garden Room has been fully insulated and features double glazing in both the windows and double doors. Each room features Mercia's patented Shoplap+ cladding which benefits from a unique dual profile designed to extend the life of your Downtown Insulated Garden Room. Each panel is locked together to form a solid, weatherproof board with ample runoff for rainwater.

Product Features

  • Under 2.5m tall
  • Customisable modular design
  • Insulated walls, roof and floor
  • Double glazed windows
  • Long lasting dark grey EPDM roof
  • Installed and delivered by trained experts
  • Treatment service available
  • Frame constructed using European Soft Wood
  • Double Glazed windows
  • Double doors as standard
  • Pent roof
  • Selection of ironmongery available

Basic Electric Pack

  • Veranda down-lighting
  • Unit strip light
  • Switch with socket

Product Information 

  • Colour: Natural Wood
  • Choice of 3m or 4m depth
  • Eaves Height: 2.2m
  • Framing: 44 x 44mm

*As these garden buildings are below 2.5m tall they usuall do not require planning permission however, planning permission varies by council, we recommend checking with your local council to identify whether planning permission is or isn't required.

**Basic Electric pack will be fitted to the building but not connected to the mains supply. If you would like to arrange installation please contact the website team for a quote.

***Additional Electrical pack (40A RCS (6A/32A), 2 x 13A DBL socket, 2G 2Way Switch, 1 x 1kW Heater, 3 x Wall Light, 1x Ceiling Light and Cabling) available at request. If you wish to receive a quote for the Additional Electrical pack please contact a member of the website team.

****All images have been dressed and painted for display purposes. Treatment service is available but not standard. If you would like to find out what treatments are available and receive a quote please contact the website team.

*****Customer is required to lay suitable foundations for the Downtown Insulated Garden Room before delivery and assembly.

Tips on Base Preparation

When purchasing any garden building it is necessary to construct a base for your building to be erected on. This does not need to be elaborate as long as it is level and firm. Mercia recommends the two bases below, these base preparations will ensure that once your new building arrives it can be erected right away onto secure even ground.


Possibly the best and most effective way to have a base put in place for a garden room. We would suggest a hardcore base approx 2" deep and the shutter up to allow a further 2" of concrete to be laid onto this. Always make sure your base 70cm larger all around the sides of the building i.e. a 4m x 5m would need to be 4.7m x 5.7m to allow any overhang.

Paving slabs

This is another method that will enable the building to sit level and flat, the ground area would need to be levelled out before laying sharp sand down then tamper down the slabs leaving a small gap between the slabs.


We hope you are satisfied with your purchase but if you ever need to return an item, you can do so within 30 days of receipt.

Please note, we cannot offer refunds on perishable goods, pierced jewellery, duvets, pillows, mattresses, underwear or on swimwear if the hygiene seal is not in place or has been broken. Items which are made to order will also be non returnable unless faulty or not as described. Your legal rights are not affected.

Goods can be returned to your nearest Oldrids & Downtown store, or alternatively, tell us about the product you want to return by emailing us at or phoning us on 03452 505502, remembering to include your order number, 10 digit item code and the reason for return and whether you would like a full refund or a replacement.

We recommend that a verifiable method of return delivery is used, as proof of posting cannot be taken as proof of receipt.

For larger items we can organise for a courier to come and collect the product you wish to return and will discuss collection charges with you at the time.

Click here to view our full Returns Policy.