Dunster House Ltd.
Incorporated. 1994
Search results
Lines are open until 8:00PM
Lines are open until 8:00PM
01234 272 445
2-3 WEEKS*
inc. VAT
  • High internal eaves
    The high internal eaves (1.97m/6'5") give a spacious, light and airy feel once you're inside. There'll be no worry about bumping your head... unless you're taller than 6'5" of course.
    Heavy duty frames
    The chunky 60mm or 86mm thick corner posts coupled with the 45mm thick framework either side makes our summerhouses very solid. The 16mm thick cladding adds to this rigidity and gives a substantial look and feel.
  • 4mm Toughened Glass
    We use 4mm toughened glass in our windows and doors for increased safety and security. It's much better than 3mm horticultural glass, commonly found in garden buildings, as it's a lot harder to break, and if ever it is broken it breaks into small pieces rather than large shards. It is also much harder to scratch than the plastic alternatives, styrene, acrylic and perspex, so will preserve your clear view out for far longer.
    Strong cylinder lock
    A strong cylinder lock will help keep your summerhouse secure. It'll keep your belongings safe from unwanted visitors, and it'll stop the kids from messing up your relaxation space.
  • No glued together offcuts
    We only use full lengths of timber in our buildings - we don't glue separate pieces together with finger joints. Not only are they stronger, but they look much better too.
  • Georgian Bars
    Our windows and doors come with optional sculpted Georgian bars that sit firmly against the glass, rather than float in front of them. When applied to the windows and doors they add a traditional, elegant charm to your cabin. The Georgian bars are easily removed for maintenance, or if you decide you prefer the look of the building without them.
  • Avoid Planning permission
    This building is under 2.5m high.
    Why does this matter? Well, under permitted development rights buildings under 2.5m high can be placed as close as you want to a boundary (eg. a fence line) without planning permission. Buildings that are over 2.5m high, however, need to be placed over 2m away from any boundary
    (eg. a fence line), which means that with taller buildings you end up with a lot of space behind them. If you want to find out more about permitted development rights see our planning guide
  • 10 year guarantee
    The bearers of your garden building are pressure treated to help protect your garden building from the ground up. We provide a 10 year guarantee against rot and insect infestation for all pressure treated timbers.
    Fixing pack Included
    We include all of the screws, nails and fixings needed to put your garden building together, not everyone is that thoughtful! So there's no need to worry about the type of screws, or length of nails etc you might need to get started, it's all there in the pack!
  • Avoid sagging roof
    Our summerhouses have robust 70mm x 35mm roof beams, which are reinforced by additional supports at the sides of each roof panel. With the metal spider brackets and 19mm roof boards this gives a very strong roof structure to make sure that roof sagging is an issue that will only be suffered by the customers of companies that supply lesser products.
  • Easy to build panel system
    The 16mm shiplap walls come in panels, so each piece of timber is cut to size. These panels are easy to slot in-between the solid 60mm or 86mm corner posts, making the construction of your summerhouse quick and simple, almost like a giant jigsaw puzzle.
  • Pressure treated floor bearers
    By pressure treating our floor bearers we protect the lowest part of the building from rot and insect infestation. This forces the treatment deep into the timber using a large pressure treatment tank. Due to this costly but effective process we can offer our customers a genuine 10 year guarantee against rot and insect infestation on the bearers with no need for the customer to re-treat this timber at any point during that time.

Now personalise your product

Enter delivery postcode
Enter your UK postcode for Delivery
One Person Delivery
Two Person Delivery
Installation Inc. Two Person Delivery
inc. VAT
Chosen options
Additional Information
Need Planning Permission?
Delivery Online Tracking

We deliver our garden buildings to mainland United Kingdom (England, Wales and Scotland). Some exceptions apply; these are illustrated on the map below.

Scottish areas may be subjected to slightly longer delivery turnarounds, please contact us for details. FREE delivery on selected products over £199 to mainland England and Wales.
*Excludes rabbit products which are subject to a delivery charge.

Delivery Price

Green - £19.99 delivery fee on all orders under £200.
Yellow - £59.99 delivery fee, was £119.99 prior to 10/09/15
Orange - £84.99 delivery fee. was £169.99 prior to 10/09/15
Red - We do not deliver to these areas.

Assisted Delivery

If you cannot provide an able bodied person to offload the vehicle with the help of our driver, we can provide additional manpower with our Assisted Delivery Service. The driver will arrive with some help to unload the lorry, meaning that you can put your feet up.

We offer this service on all items that are delivered, we do not offer this on our couriered products. Prices for this service can be found on individual products.

Should you require further information on our standard or assisted delivery services, please contact a member of our Sales Team.

Scottish areas may be subjected to slightly longer delivery turnarounds, please contact us for details.

Valiant 350 Summerhouse W3.5m x D2.5m

The image above shows a brief reference to how your products will arrive. All of our garden buildings are made from kiln dried quality graded timber, if it is to be stored prior to construction and treatment all parts must be covered to prevent moisture from warping and rotting the timber.

Case Studies and Reviews
Reviews for this product are shown below. To see all reviews and also case studies to help inspire you click here
To submit a new review, click here
Reviews for this product are shown below.
Average Seller Rating:

Excellent purchase, very happy with the quality and the customer service I experienced Would highly recommend the product and all associated with Dunsterhouse.
By - robert sparks on Aug 30,16

Successfully installed with care and attention, many thanks
By - Iain Reichwald on Jul 13,16

We are really pleased with our Valiant 350 summerhouse. It was easily installed over 2 days by 2 people. We added some strengthening pieces of wood to ensure no warp.To finish of the floor we put some B & Q laminate flooring - all looks great.
By - Peter Baxter on Jun 30,16

I';m very pleased with this summer house. I was looking for something large enough for an art studio and this fitted the bill. It was very easy to construct and once I'd sealed treated and painted it it looked lovely. This arrived the week before Christmas and I put it up at this time. This is a very nicely put together package I had no issues with the quality of the materials used for the summerhouse so all round 5stars a good quality summerhouse that can be used throughout the winter months if adequately sealed and insulated. Like I said I use this as my art studio and even in the worst of the weather I'm as snug as a bug! A very spacious building for the price.
By - Tony Finlay on Jan 13,15

Very pleased with this summerhouse. Delivery was as stated by you and on time and driver couldn't have been any more helpful than he was. My husband and two friends assembled this without too much trouble in about 8 hours.
By - Christine Henderson on Sep 06,14 Dunster House reply:
Thank you for taking the time to write your review. We will make sure your thanks are passed on to the driver, we love to hear that our customers have enjoyed their service.

Pleased with the summerhouse. Comprehensive build instructions made it easy to assemble. Two people required for some of the build. One suggestion to aid the build of the roof purlins would be to use the roof trims to obtain the correct spacing for the purlins as they can be easily positioned incorrectly.
By - graeme verney on Sep 01,14 Dunster House reply:
Dear Graeme, thank you for your review. Glad you enjoyed the build.

Hello I am very pleased with my summer house, In fact I am over the moon with it cant wait to sit in it with my glass of wine. I was very pleased with the staff who put it together lovely guys, Will recommend Dunster House to people, merry Christmas to you all.
By - Geraldine Colcutt on Jul 07,14

Excellent - we had seen some previous reviews which did not seem good but our experience has been great from initial purchase through to build completion. Customer service (Sam) responded very quickly to technical queries I had before delivery. The delivery man was extremely helpful ( I wish I had got his name because he is an asset that Dunster should recognise)very helpful and far better than expected. We built the house ourselves and all went smoothly - no problems no bits missing. As this is pine wood we coated everything before the build just to give that bit of extra protection at all the joints. We are very happy with the end result. Dunster have received some poor reviews and we can only assume they have taken these on board because the service was Excellent and I do not normally do reviews. We first saw a similar house at a location for 4 times our cost to complete. I would definitely buy from Dunster again.
By - Tony Craig on Jun 09,14

Fantastic ! Dunster not only supply a great product..their service is efficient and polite from start to finish. The only addition I would add...unless you are a DIY enthusiast ,get someone to erect it !
By - Stephen Robson on Mar 29,14

Delivery time was with two weeks. Delivered with no damages. Came in sections and no problem erecting with instructions given. Changed the door position with no problems. Now it is painted and roof finnished and looks fantastic. Really Pleased
By - matthew turner on Oct 10,13

Absolutely delighted with our Summer House that we've turned into a home gym (see pics).
By - Simon Steeden on Sep 16,13

Thank you so much for our beautiful Summerhouse. The quality is first class, The service was excellent I was kept informed every step of the way. The man who erected the 350 Valiant Summerhouse were very professional worked very hard for two days. The finished job was perfect. The price of the Summerhouse was not to be beaten I do not know how they do it for the price excellent value. Once again thank you so much. Linda White Bingley.
By - linda white on Jul 22,13

This is the prettiest summerhouse on the market, elegant and well-proportioned, and admired by all my richer neighbours, I love it. Easy to put together, everything fitted together perfectly. I added an all round guttering and I virtually live in it. I will send you some pics when I get time to take some decent shots. This is the main feature in my garden now, Thanks a lot, a wonderful little house.
By - Ken Evans on Aug 15,12

Employees at both Dunster House sales office and despatch office when ordering were excellent and competent, which gave me confidence prior to delivery. The Summerhouse was delivered on time by a helpfull driver. We have errected, easy assemble instructions to follow,and are very happy with the quality of the product. All neighbours, family and friends have enquired "who supplied" and we have been pleased to say Dunster House - i am sure more orders will be received. Excellent - sounds like a happy customer to me - correction "very" happy customer.
By - Raymond Pearce on Aug 03,12

I have been delighted with my Valiant 350 and now it's varnished in willow with white window frames it's been getting a lot of admiration. Excluding levelling the ground and laying a base of paving slabs it has probably taken about 6 man days to finish, of which probably 2 were applying the varnish. Putting it up was all pretty straightforward. We separated all the pieces first, mapped them against everything in the instructions and it all went up fairly quickly - there were only a couple of times when we put things in the wrong way, but it's a fairly forgiving design and you can undo things pretty quickly. You can put the panels, doors and windows in pretty much any configuration - we have glass along the front and the whole of one side. I chose the felt rolls for the roof, which I think was right because the slope is so flat I don't think the tiles would really be that visible. The instructions for the felt rolls come separately and I didn't read them properly, which is my own stupid fault, so the felt took longer than necessary and needed some fixing afterwards. This is the hardest bit so I would suggest you don't do it at the end of the day. But overall a very easy thing to put up with moderate DIY skills and a really impressive summerhouse when all is done and dusted.
By - Maurice Millen on Jul 07,11

Show all Reviews and Case Studies