TGB™ DELIVERY: 2-4 Weeks*

*The current lead time for TGB Delivery & Installation to most areas is 2-4 weeks, although bespoke buildings, Tanalised® pressure-treatment, and delivery to remote postcode areas may take longer. At the moment, we are offering a FREE assembly service with these buildings, which will be done at the same time as delivery.

TGB Sunningdale Summerhouse *FREE ASSEMBLY*

TGB Sheds Sunningdale Summerhouse is a high quality pent building, DELIVERED AND INSTALLED FREE in your garden! It features a 15" roof overhang, large toughened windows and double doors, and is available in 9 popular sizes, 8x6 up to 12x10. OFFICIAL STOCKIST.


TGB Sunningdale Summerhouse *FREE ASSEMBLY*

tgb lead timeThe TGB Sunningdale Summerhouse is a high quality, wooden, pent-roofed summer house, made by one of the UK’s most respected timber garden building manufacturers.

The TGB Sunningdale Summerhouse is a traditionally built British summerhouse, featuring a delightful 15″ (40cm) roof canopy to the front. It has large toughened glass windows and double doors with ornate antique ironmongery.

The TGB Sheds Sunningdale Summerhouse is available in 9 popular sizes – 8×6 up to 12×10, all combining a clean, light, airy, modern style with an unbeatable price.

Our TGB Sheds product range is second to none, featuring hundreds of great quality buildings, accessories and optional extras, however it is difficult to show everything fully on a single web page. We are an OFFICIAL PREMIER STOCKIST of all TGB products, therefore you are welcome to visit our Edinburgh display site to see the buildings in person.



  • FREE delivery*
  • Professionally INSTALLED IN YOUR GARDEN*
  • FREE Brown preservative treatment
  • Large toughened glass windows
  • 15″ roof canopy to front
  • Mortice lock c/w 2x keys
  • Plain roof fascias
  • Antique style black hinges and lever handles
  • 16mm nominal (12mm finish) tongue & groove shiplap cladding
  • High quality, slow growing Scandinavian timber
  • T&G floor and roof
  • 9x sizes from 8×6 up to 12×10
  • Bespoke options available


Quality Construction

The TGB Sunningdale Summerhouse is manufactured using high quality, slow-growing, sustainable Scandinavian Pine from well managed, sustainably certified forests.

TGB Sunningdale Summerhouse are constructed using 16mm nominal (approx. 12mm finished) tongue and groove shiplap timber walls, along with tongue and groove roofs AND floors, however this can be upgraded to a massive 22mm nominal thickness (approx. 18mm finished) if required.

Please note that NO chipboard or OSB is used in the construction of ANY TGB building. These TGB buildings are supplied pre-treated with a Light Brown, Eco-Friendly preservative basecoat. Strong, smoothed, rounded and planed framing has been used internally, which is doubled at the corners for extra strength.

For security, an internal lock c/w key is fitted as standard, and mineral roofing felt is supplied to keep the roof watertight.



TGB Sunningdale Summerhouses are supplied pre-treated with a quality brown, non-toxic preservative base coat. This ensures that your garden building is ready to accept any preservative colour of your choice.

Alternatively we can supply them made from long-lasting Tanalised pressure-treated timber with a 15-year anti-rot warranty, or you can have your building factory-painted in a choice of 12x popular colours (maximum 2x colours per building). These look great, and don’t require any additional painting immediately… please contact us for details. Please remember that the colours shown below will look slightly different on your device, and from batch to batch.

Brown PreservativeTanalised Pressure-treated PreservativePaint Colour OptionsPaint Colour Options 2024


Doors, Locking System & Windows

The TGB Sunningdale has double doors (1170mm wide) are supplied complete with a mortice lock c/w 2x keys and ornate, antique-style black hinges and lever handles. This building features 6x large 1647mm x 515mm toughened glass windows fitted in the walls, with another 2x matching panes in the doors, giving a total of 8x windows guaranteeing a light, airy garden room.


Professional Assembly Included

We will install the TGB Sunningdale Summerhouse at NO ADDITIONAL CHARGE although some geographical limitations apply. Our FREE ASSEMBLY SERVICE covers approx. 90% of the UK mainland population, and requires non-restrictive access and a suitable base/site.

A1 Sheds FREE Assembly Logo


DIY Assembly Video

Assembling the TGB Sunningdale yourself can be very satisfying and it has several advantages: you probably won’t have to wait as long for delivery, you can assemble it on a day suitable to you, you can pre-treat the panels beforehand allowing the best possible protection for your building.

TGB Sheds, Playhouses and Summerhouses come with all the fixings and fastenings you need, but to make things even easier, here is an installation video that you can follow showing the assembly of a typical TGB building.



Optional Extras

This TGB Sunningdale Summerhouse is supplied as a full kit, complete with all necessary fixings, fastenings, glazing and roofing materials. Optional extras include professional assembly, framing and wall thickness upgrades, double doors, opening windows, heavy flooring, verandas, log-lap cladding, toughened glass etc.

The Sunningdale can also be made to a bespoke size or configuration… please call for details.



Please contact us prior to purchase if you have any queries regarding the dimensions, or if you require exact sizes. Roof overhangs will extend beyond the Body Size shown below (all dimensions are finished sizes).

Model Frame Body Size (mm) Height (mm)  Double Door Fixed Windows
TGB Sunningdale Summerhouse (mm) Length Depth Eaves Ridge Height Width Walls Door
8×6 TGBSUNDALE0806 44×32 2438 1829 1950 2220 1790 1170 6 2
10×6 TGBSUNDALE1006 44×32 3048 1829 1950 2220 1790 1170 6 2
12×6 TGBSUNDALE1206 44×44 3658 1829 1950 2220 1790 1170 6 2
8×8 TGBSUNDALE0808 44×32 2438 2438 1950 2220 1790 1170 6 2
10×8 TGBSUNDALE1008 44×32 3048 2438 1950 2220 1790 1170 6 2
12×8 TGBSUNDALE1208 44×44 3658 2438 1950 2220 1790 1170 6 2
8×10 TGBSUNDALE0810 44×32 2438 3048 1950 2220 1790 1170 6 2
10×10 TGBSUNDALE1010 44×32 3048 3048 1950 2220 1790 1170 6 2
12×10 TGBSUNDALE1210 44×44 3658 3048 1950 2220 1790 1170 6 2

Please contact us prior to purchase if you have any queries regarding the dimensions. Sizes shown above are finished sizes (not nominal), however you should note that the roof will extend beyond the Body Size shown above.

Information shown above has been supplied by the manufacturer, and is as accurate as possible (errors and omissions excepted), however it is intended only as a guide. This high quality building has an expected lifespan well in excess of 15-years. We recommend that you install the building on a solid, free-draining base, with at least 60cm free space all around for maintenance and to avoid splashback.

You should treat all sections with a high quality, spirit-based preservative prior to assembly, and subsequently every year in accordance with the manufacturers instructions. Please ensure that regular general maintenance is carried out on all moving parts, and that the roofing felt is regularly inspected, and replaced if required.