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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Evolution Large Overhang Insulated Garden Room

From £213.13 / month

From£10,230

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18 x 12

16 x 10

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

10 x 14

12 x 14

14 x 14

16 x 14

18 x 14

20 x 14

Free delivery from Fri 12 Mar*

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Pressure Treated Evolution Insulated Garden Room

From £160.56 / month

From£7,707

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 12 Mar*

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The Project Timber Evolution Insulated Garden Room

From £146.65 / month

From£7,039

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 12 Mar*

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Pressure Treated Grandmaster Fusion With Partition Wall

From £46.63 / month

From£2,238

Sizes

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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 12 Mar*

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Pressure Treated Diplomat Grandmaster Garden Room

From £54.63 / month

From£2,622

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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

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 12 Mar*

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Project Timber Evolution Apex Garden Room

From £333.92 / month

From£16,028

Sizes

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18 x 12

14 x 12

16 x 12

20 x 12

Free delivery from Fri 12 Mar*

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The Project Timber Evolution Cedar Insulated Garden Room

From £317.33 / month

From£15,232

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 12 Mar*

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The Project Timber Evolution Offset Door Insulated Garden Room

From £253.08 / month

From£12,148

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 12 Mar*

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Pressure Treated Diplomat Offset Grandmaster Summerhouse

From £49.23 / month

From£2,363

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 12 Mar*

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Project Timber Evolution Garden Pod

From £224.38 / month

From£10,770

Sizes

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18 x 12

16 x 10

12 x 10

14 x 10

12 x 12

14 x 12

16 x 12

20 x 12

Free delivery from Fri 12 Mar*

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Evolution Western Red Cedar Insulated Garden Room with Partition Wall

From £475.54 / month

From£22,826

Sizes

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18 x 12

16 x 10

16 x 8

18 x 8

20 x 8

18 x 10

20 x 10

22 x 10

24 x 10

26 x 10

28 x 10

30 x 10

16 x 12

20 x 12

22 x 12

24 x 12

26 x 12

28 x 12

30 x 12

Free delivery from Fri 12 Mar*

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The Project Timber Evolution Insulated Garden Room with Partition Wall

From £189.27 / month

From£9,085

Sizes

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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 12 Mar*

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The Project Timber Evolution High Window Insulated Garden Room

From £190.38 / month

From£9,138

Sizes

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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 12 Mar*

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Pressure Treated Diplomat Grandmaster Long Window Summerhouse

From £62.08 / month

From£2,980

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 12 Mar*

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Pressure Treated Grandmaster Clockhouse Garden Room

From £59.15 / month

From£2,839

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 12 Mar*

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