18 x 12 Summerhouses

Does your garden space feel empty? Do you find yourself not enjoying your outdoor space through lack of shade and shelter? Then take a peek at our fabulous 18 x 12 summer houses. These quality built wooden summer houses are the perfect addition to any garden, quite literally transforming any space by offering the perfect place to relax and unwind with seating, or even house that all-important outdoor bar.

Our wooden summer houses are made using the best materials available and treated with a specialist anti-rot treatment to allow it to withstand the elements, giving you the perfect place to enjoy your garden for years to come. Our 18 x 12 summer houses have become a particularly popular choice, offering a great amount of space without taking up too deep a footprint in your garden. For more information on our free delivery, 0% finance or of course, our professional assembly service, simply contact us today.

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Project Timber Evolution Long Window Pent Garden Room

From £119.36 / month

From£5,213

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18 x 12

12 x 12

14 x 12

16 x 12

20 x 12

Free delivery from Fri 26 Jul*

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The Project Timber Evolution Cedar Insulated Garden Room

From £176.25 / month

From£7,698

Sizes

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18 x 12

16 x 10

8 x 8

10 x 8

12 x 8

14 x 8

16 x 8

18 x 8

20 x 8

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

Free delivery from Fri 26 Jul*

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The Project Timber Evolution Insulated Garden Room

From £77.82 / month

From£3,399

Sizes

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18 x 12

16 x 10

8 x 6

10 x 6

12 x 6

8 x 8

10 x 8

12 x 8

14 x 8

16 x 8

18 x 8

20 x 8

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

Free delivery from Fri 26 Jul*

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The Project Timber Evolution Insulated Garden Room with Partition Wall

From £107.59 / month

From£4,699

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18 x 12

16 x 10

10 x 8

12 x 8

14 x 8

16 x 8

18 x 8

20 x 8

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

Free delivery from Fri 26 Jul*

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The Project Timber Evolution Offset Door Insulated Garden Room

From £89.64 / month

From£3,915

Sizes

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18 x 12

16 x 10

14 x 8

16 x 8

18 x 8

20 x 8

14 x 10

18 x 10

20 x 10

14 x 12

16 x 12

20 x 12

Free delivery from Fri 26 Jul*

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Project Timber Evolution Apex Garden Room

From £148.80 / month

From£6,499

Sizes

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18 x 12

14 x 12

16 x 12

20 x 12

Free delivery from Fri 26 Jul*

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Pressure Treated Diplomat Grandmaster Long Window Summerhouse

From £47.97 / month

From£2,095

Sizes

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18 x 12

16 x 10

8 x 10

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

22 x 10

24 x 10

8 x 12

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

22 x 12

24 x 12

8 x 14

10 x 14

12 x 14

14 x 14

16 x 14

18 x 14

20 x 14

22 x 14

Free delivery from Fri 26 Jul*

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Pressure Treated Grandmaster Fusion With Partition Wall

From £29.47 / month

From£1,287

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18 x 12

16 x 10

12 x 8

14 x 8

16 x 8

18 x 8

22 x 8

14 x 10

18 x 10

20 x 10

22 x 10

24 x 10

14 x 12

16 x 12

20 x 12

22 x 12

24 x 12

14 x 14

16 x 14

18 x 14

20 x 14

22 x 14

24 x 14

Free delivery from Fri 26 Jul*

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Pressure Treated Diplomat Grandmaster Summerhouse

From £25.46 / month

From£1,112

Sizes

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18 x 12

16 x 10

8 x 8

10 x 8

12 x 8

16 x 8

8 x 10

10 x 10

12 x 10

18 x 10

20 x 10

22 x 10

24 x 10

8 x 12

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

22 x 12

24 x 12

8 x 14

10 x 14

12 x 14

14 x 14

16 x 14

18 x 14

20 x 14

22 x 14

24 x 14

Free delivery from Fri 26 Jul*

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Pressure Treated Diplomat Offset Grandmaster Summerhouse

From £25.46 / month

From£1,112

Sizes

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18 x 12

16 x 10

8 x 8

10 x 8

12 x 8

14 x 8

16 x 8

18 x 8

20 x 8

22 x 8

24 x 8

8 x 10

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

22 x 10

24 x 10

8 x 12

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

22 x 12

24 x 12

10 x 14

12 x 14

14 x 14

16 x 14

18 x 14

20 x 14

22 x 14

24 x 14

Free delivery from Fri 26 Jul*

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Pressure Treated Grandmaster Clockhouse Garden Room

From £25.46 / month

From£1,112

Sizes

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18 x 12

16 x 10

8 x 10

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

22 x 10

24 x 10

8 x 12

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

22 x 12

24 x 12

8 x 14

10 x 14

12 x 14

14 x 14

16 x 14

18 x 14

20 x 14

22 x 14

24 x 14

Free delivery from Fri 26 Jul*

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Diplomat Grandmaster Summerhouse

From £22.87 / month

From£999

Sizes

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18 x 12

16 x 10

8 x 8

10 x 8

12 x 8

14 x 8

16 x 8

18 x 8

20 x 8

22 x 8

24 x 8

8 x 10

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

22 x 10

24 x 10

8 x 12

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

22 x 12

24 x 12

10 x 14

12 x 14

14 x 14

16 x 14

18 x 14

20 x 14

22 x 14

24 x 14

Free delivery from Fri 26 Jul*

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Diplomat Offset Grandmaster Summerhouse

From £22.90 / month

From£1,000

Sizes

Show All Sizes

18 x 12

16 x 10

8 x 8

10 x 8

12 x 8

14 x 8

16 x 8

18 x 8

20 x 8

22 x 8

24 x 8

8 x 10

10 x 10

12 x 10

14 x 10

18 x 10

20 x 10

22 x 10

24 x 10

8 x 12

10 x 12

12 x 12

14 x 12

16 x 12

20 x 12

22 x 12

24 x 12

10 x 14

12 x 14

14 x 14

16 x 14

18 x 14

20 x 14

22 x 14

24 x 14

Free delivery from Fri 26 Jul*

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