Forest Garden Xtend 4 Plus Insulated Garden Building

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Product ID: 61836
Dispatch Time Stock expected in 6 to 7 weeks
FREE Delivery (postcode specific)*
Need help? +44 (0) 1305 231 231

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Forest Garden Xtend 4 Plus Insulated Garden Building

You'll love it because...

Extend your living space with the Forest Garden Xtend 4 Plus Insulated Garden Building. Enjoy your garden space in all weather, relax during the summer months, with the windows and double doors open wide creating a refreshing brisk breeze and during those colder months cosy up under a few blankets with a hot chocolate in hand whilst listening to the rhythm of falling rain. Multiple options are definitely what this beauty provides, whether to hook up some electric and work from home or just to be used as a gadget-free zone. Having this secret retreat within your garden is ultra-stylish, super secure and completely luxurious. With so much room to play around with, decorate with blankets, cushions and home decor and create the escape you've been longing for. Constructed from the highest quality, energy-efficient materials, whilst being completely weatherproof and fully insulated, the possibilities for this contemporary building are endless. What more could you want?

Features and Benefits:

  • Create a garden studio, home office, gym or workshop
  • Constructed from high quality, pre-cut energy efficient SIPs panels 
  • Waterproof roof covering made from EPDM black rubber 
  • Primed interior so can be painted or stained if desired 
  • Lockable glazed 7 point multi lock single door entrance 
  • Able to route electrical wiring and recess roof lights internally 
  • Anthracite grey outer windows and doors with white inner frame
  • Two double clasp window locking device
  • Double door opening
  • Features 2 x double glazed 1/2 opening windows
  • Double glazing helps insulate the cabin during the winter months


  • Height: 250cm
  • Width: 404cm
  • Depth: 342cm
  • Wall cladding thickness: External 15mm / internal 9mm
  • Roof thickness: 122mm
  • Floor thickness: 108mm 
  • Glazing thickness: 4mm
  • Door size: 195 x 80cm (each door)
  • Internal dimensions: 207 x 367 x 268cm

Good to know:

  • Available in other sizes and configurations
  • 15 year structural guarantee
  • 50 years roof life expectancy 
  • Self-assembly required
  • Installation available separately 
  • All fixtured, fittings and step-by-step instructions included
  • EPC energy rating of 78 category C
  • Xtend buildings arrive untreated - please see instructions for recommended treatments
  • Wooden buildings must not be placed directly on soil or grass - we recommend building the log cabin upon a firm and level surface such as a poured concrete base

Delivery and Returns

Please note that some of our EU manufacturers are still dealing with the legacy of Covid and Brexit. In addition to this there has been a huge surge in orders for the home which impacts on the supply of raw materials. Whilst we will always endeavour to commit to our advertised lead times, please be aware that delays are still possible. Our dedicated customer service team will do their very best to keep you updated. Please see our FAQs for more information.


We offer FREE Mainland UK Delivery on Orders over £70*

We offer a 30 Day Money Back Returns Policy. Click here for our Returns Table and T's & C's

Delivery Table:

Orders over £70 FREE 1-3 working days
Std UK (under £70) £4.95 1-3 working days
Express £6.95 next working day if ordered before 2pm Mon - Thurs
Saturday £12.95 next day if ordered before 2pm on Friday

*Our FREE Mainland UK Delivery Service applies to orders over £70 but excludes Scottish Highlands and other remote areas. Due to additional courier charges, a surcharge may apply to Scotland, ROI, and areas outside Mainland UK for furniture deliveries and orders over 20kg and with a carton size larger than 61cm x 46cm x 46cm. For more information please refer to our Delivery Costs and Services here.

*Furniture and Made to Order items are excluded from Express, Click & Collect and Saturday delivery options. 

Please note:

  • Our couriers and furniture delivery teams deliver between the hours of 8am and 8pm, Monday - Friday. If you would prefer a weekend delivery or if you would like to specify morning or afternoon  this can be arranged for an extra charge.
  • For Delivery charges of Beds & Furniture outside Mainland UK (N. Ireland, Isle of White etc) or for all other International Destinations please contact us for a quote on or call us on +44 (0) 1305 231 231 Mon-Fri 9-6pm UK time.
  • For all other International orders outside the UK please see our Overseas/Rest of the World Delivery Rates & Timescales here.

Off Shore

For Zone C and Zone D postcodes (including Offshore Islands, Scottish Highlands & Remote Areas, Channel Islands and Ireland), delivery could take up to 14 working days from the date advertised on the product detail page. Please refer to our Delivery Costs and Services here.

Delivery Timescales

Deliveries occur during weekdays between 8am and 8pm. We do use carriers that offer a Saturday or Sunday delivery option – feel free to select this option (where applicable).

Please Note: We do charge extra for weekend deliveries or pre 10am or post 6pm deliveries. The charge for this service is £30.00 (if this service is available in your area).


Product Specifications

Brand Forest Garden
Name Forest Garden Xtend 4 Plus Insulated Garden Building
Condition New
Colour Natural Wood
Price Match Guarantee Yes
Price £15,180.95
Dimensions 250cm x 404cm x 342cm
EAN 5013053183632
Availability Stock expected in 6 to 7 weeks
Designed in United Kingdom.

Brand: Forest Garden Based and Made in: United Kingdom

The UK’s leading manufacturer and distributor of quality wooden furniture and garden buildings, Forest Garden know a thing or two about timber! With over 50 years of experience they offer practical and gorgeous designs for every garden. From pavilions and pergolas to spacious summerhouses and security sheds, there is something for every outdoor space. As all of their structures, furniture and planters are made from wood; protecting this natural resource is something Forest Garden are very passionate about. By modifying the way they run their business, Forest Garden strive to make as little impact on the environment as possible. Preventing pollution, minimizing waste and managing their energy output – from harvesting to distribution they continue to combat key environmental, social and economic issues. Forest Garden are fully committed to using wood in a responsible and efficient way, ensuring all timber has been ethically sourced from well-managed FSC Certified woodlands helping sustain and support this essential resource for future generations. Most of the timber has been grown in UK forests – British grown and manufactured, quality is also at the core of Forest Garden. Not forgetting their association with the national charity Thrive, Forest Garden have specially designed a selection of planters and raised beds for people with disabilities and wheelchair users, enabling everyone to make the most of their outside space. Forward thinking and adhering to the highest standards, we’re proud to work with Forest Garden. 

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