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01777 802300
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50 years experience
Manufactured in Great Britain
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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 10 years anti-rot guarantee, these summer houses really are not only a fantastic investment, but a great way to extend your living space. With 0% finance 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.

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  • Project Timber Evolution Apex Garden Room

    From £149.51 / month
    From Total£6,530
    Now Only £5877

    New Year Promo

    Was £6530

    Now Only
    £5877
    Save £653

    10% Off
    WITH CODE NEWYEAR10
    Sizes
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    20 x 12
    14 x 12
    16 x 12
    18 x 12
    Free delivery from Fri 8 Feb*
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  • The Project Timber Evolution Insulated Garden Room

    From £73.06 / month
    From Total£3,191
    Now Only £2872

    New Year Promo

    Was £3191

    Now Only
    £2872
    Save £319

    10% Off
    WITH CODE NEWYEAR10
    Sizes
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    20 x 12
    8 x 6
    10 x 6
    12 x 6
    8 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • The Project Timber Evolution Insulated Garden Room with Partition Wall

    From £89.09 / month
    From Total£3,891
    Now Only £3502

    New Year Promo

    Was £3891

    Now Only
    £3502
    Save £389

    10% Off
    WITH CODE NEWYEAR10
    Sizes
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    20 x 12
    10 x 8
    12 x 8
    14 x 8
    16 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • The Project Timber Evolution Offset Door Insulated Garden Room

    From £90.12 / month
    From Total£3,936
    Now Only £3542

    New Year Promo

    Was £3936

    Now Only
    £3542
    Save £394

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    14 x 8
    16 x 8
    18 x 8
    20 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Diplomat Grandmaster Long Window Summerhouse

    From £44.67 / month
    From Total£1,951
    Now Only £1756

    New Year Promo

    Was £1951

    Now Only
    £1756
    Save £195

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    14 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Alpine Grandmaster Long Window Summerhouse Cabin

    From £43.85 / month
    From Total£1,915
    Now Only £1724

    New Year Promo

    Was £1915

    Now Only
    £1724
    Save £192

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    16 x 9
    20 x 9
    16 x 12
    16 x 14
    Free delivery from Fri 8 Feb*
    View Product

  • Diplomat Offset Grandmaster Summerhouse

    From £43.62 / month
    From Total£1,905
    Now Only £1715

    New Year Promo

    Was £1905

    Now Only
    £1715
    Save £191

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    14 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Diplomat Grandmaster Summerhouse

    From £43.39 / month
    From Total£1,895
    Now Only £1706

    New Year Promo

    Was £1895

    Now Only
    £1706
    Save £190

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    14 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Alpine Grandmaster Summerhouse Cabin

    From £48.77 / month
    From Total£2,130
    Now Only £1917

    New Year Promo

    Was £2130

    Now Only
    £1917
    Save £213

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    16 x 9
    20 x 9
    16 x 12
    16 x 14
    Free delivery from Fri 8 Feb*
    View Product

  • Grandmaster Clockhouse Garden Room

    From £67.77 / month
    From Total£2,960
    Now Only £2664

    New Year Promo

    Was £2960

    Now Only
    £2664
    Save £296

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    14 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Duke Grandmaster Summerhouse

    From £43.02 / month
    From Total£1,879
    Now Only £1691

    New Year Promo

    Was £1879

    Now Only
    £1691
    Save £188

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    16 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Pressure Treated Diplomat Offset Grandmaster Summerhouse

    From £27.70 / month
    From Total£1,210
    Now Only £1089

    New Year Promo

    Was £1210

    Now Only
    £1089
    Save £121

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    14 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Pressure Treated Alpine Grandmaster Summerhouse Cabin

    From £72.35 / month
    From Total£3,160
    Now Only £2844

    New Year Promo

    Was £3160

    Now Only
    £2844
    Save £316

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    16 x 9
    20 x 9
    16 x 12
    16 x 14
    Free delivery from Fri 8 Feb*
    View Product

  • Pressure Treated Diplomat Grandmaster Summerhouse

    From £31.73 / month
    From Total£1,386
    Now Only £1247

    New Year Promo

    Was £1386

    Now Only
    £1247
    Save £139

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    16 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Pressure Treated Grandmaster Clockhouse Garden Room

    From £36.91 / month
    From Total£1,612
    Now Only £1451

    New Year Promo

    Was £1612

    Now Only
    £1451
    Save £161

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    14 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Pressure Treated Duke Grandmaster Summerhouse

    From £36.84 / month
    From Total£1,609
    Now Only £1448

    New Year Promo

    Was £1609

    Now Only
    £1448
    Save £161

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    8 x 8
    10 x 8
    12 x 8
    16 x 8
    Free delivery from Fri 8 Feb*
    View Product

  • Pressure Treated Grandmaster Fusion With Partition Wall

    From £117.16 / month
    From Total£5,117
    Now Only £4605

    New Year Promo

    Was £5117

    Now Only
    £4605
    Save £512

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    14 x 10
    16 x 10
    18 x 10
    20 x 10
    Free delivery from Fri 8 Feb*
    View Product

  • Diplomat Grandmaster Insulated Garden Room

    From £129.22 / month
    From Total£5,644
    Now Only £5080

    New Year Promo

    Was £5644

    Now Only
    £5080
    Save £564

    10% Off
    WITH CODE NEWYEAR10
    Sizes
    Show All Sizes
    20 x 12
    12 x 8
    16 x 8
    20 x 8
    12 x 10
    Free delivery from Tue 5 Feb*
    View Product
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