20 x 12 Summerhouses

10% offCode GM10

Grandmaster Diplomat "Classic" G1000 Summerhouse - 11mm Pressure Treated Tongue and Groove

From £1,631 £1,468

35 sizes: from 8ft × 8ft to 24ft × 14ft

10% offCode GM10

Grandmaster Alpine G1000 Summerhouse Cabin - Long Windows - 11mm Pressure Treated Tongue and Groove

From £5,107 £4,596

8 sizes: from 16ft × 9ft to 20ft × 16ft

10% offCode GM10

Grandmaster Diplomat "Classic" G1000 Summerhouse - Offset Door - 11mm Pressure Treated Tongue and Groove

From £1,631 £1,468

35 sizes: from 8ft × 8ft to 24ft × 14ft

10% offCode GM10

Grandmaster Duke "Classic" G1000 Summerhouse - 11mm Pressure Treated Tongue and Groove

From £1,861 £1,675

11 sizes: from 8ft × 10ft to 20ft × 12ft

10% offCode GM10

Grandmaster Alpine G1000 Summerhouse Cabin - 11mm Pressure Treated Tongue and Groove

From £4,956 £4,460

8 sizes: from 16ft × 9ft to 20ft × 16ft

10% offCode GM10

Grandmaster Alpine G1000 Summerhouse Cabin - Plain Side - 11mm Pressure Treated Tongue and Groove

From £4,956 £4,460

8 sizes: from 16ft × 9ft to 20ft × 16ft

10% offCode GM10

Grandmaster Diplomat "Classic" G1000 Summerhouse - Long Window - 11mm Pressure Treated Tongue and Groove

From £1,681 £1,513

36 sizes: from 8ft × 8ft to 24ft × 14ft

10% offCode GM10

Grandmaster Fusion "Classic" G1000 Summerhouse with Side Shed - 11mm Pressure Treated Tongue and Groove

From £2,127 £1,914

25 sizes: from 12ft × 8ft to 24ft × 14ft

10% offCode GM10

Grandmaster Diplomat Pavilion G1000 Summerhouse - 11mm Pressure Treated Tongue and Groove

From £9,607 £8,646

7 sizes: from 12ft × 16ft to 20ft × 16ft

10% offCode GM10

Grandmaster Clockhouse Classic G1000 Summerhouse - 11mm Pressure Treated Tongue and Groove

From £1,999 £1,799

27 sizes: from 8ft × 10ft to 24ft × 14ft

Showing all 10 products

20 x 12 Summerhouses

Would you like to maximise the use of your garden? Then why not create the perfect outdoor space to enjoy in any weather with our 20 x 12 summer houses? From extra seating to a creative space, whatever you wish to use them for, these quality built wooden summer houses are the perfect addition to any garden and built with such care and attention that they’ll withstand the elements for years to come.

With a minimum of 15 years anti-rot guarantee, these summer houses really are not only a fantastic investment, but a great way to extend your living space. With finance option and free delivery on selected postcodes, they’ve never been more affordable. For more information on our quality 20 x 12 summer houses, simply contact our friendly team of staff today.