Octagonal Summer Houses

Looking for a summer house with a sociable shape? You are in the right place. Enjoy the view of your garden with our range of octagonal summer houses from leading brands such as Rowlinson.

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  1. Mercia 3m x 4m Insulated Garden Room (with FREE Installation)
    Mercia 3m x 4m Insulated Garden Room (with FREE Installation)
    £9,099.99
    £8,599.99
    More info

    Mercia 3m x 4m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 3m x 4m Insulated Garden Room is perfect as a home office, a place to entertain guests or simply an area to relax and unwind all year round, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise from the outside is grea...
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    Save £500.00
  2. Mercia 4m x 6m Insulated Garden Room (with FREE Installation)
    Mercia 4m x 6m Insulated Garden Room (with FREE Installation)
    £12,100.99
    £11,499.99
    More info

    Mercia 4m x 6m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 4m x 6m is perfect if you're in need of a home office, additional living space or somewhere to accommodate guests. has been designed and built for year round use, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise fr...
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    Save £601.00
  3. Mercia 3m x 2m Insulated Garden Room (with FREE Installation)
    Mercia 3m x 2m Insulated Garden Room (with FREE Installation)
    £6,399.99
    £5,999.99
    More info

    Mercia 3m x 2m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 3m x 2m Insulated Garden Room creates the perfect way to make the most of your garden, while in the comfort of the indoors all year round, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise from the outside is greatl...
    View Product
    Save £400.00
  4. Mercia 2m x 3m Insulated Garden Room (with FREE Installation)
    Mercia 2m x 3m Insulated Garden Room (with FREE Installation)
    £6,399.99
    £5,999.99
    More info

    Mercia 2m x 3m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 2m x 3m Insulated Garden Room creates the perfect way to make the most of your garden, while in the comfort of the indoors all year round, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise from the outside is greatl...
    View Product
    Save £400.00
  5. Mercia 3m x 5m Insulated Garden Room (with FREE Installation)
    Mercia 3m x 5m Insulated Garden Room (with FREE Installation)
    £10,399.99
    £9,999.99
    More info

    Mercia 3m x 5m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 3m x 5m Insulated Garden Room is perfect as a home office, a place to entertain guests or simply an area to relax and unwind all year round, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise from the outside is grea...
    View Product
    Save £400.00
  6. Mercia 3m x 3m Insulated Garden Room (with FREE Installation)
    Mercia 3m x 3m Insulated Garden Room (with FREE Installation)
    £7,399.99
    £6,999.99
    More info

    Mercia 3m x 3m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 3m x 3m Insulated Garden Room is an incredibly versatile building that can be used all year round thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise from the outside is greatly reduced. Each window used in this build...
    View Product
    Save £400.00
  7. Mercia 4m x 3m Insulated Garden Room (with FREE Installation)
    Mercia 4m x 3m Insulated Garden Room (with FREE Installation)
    £9,099.99
    £8,599.99
    More info

    Mercia 4m x 3m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 4m x 3m perfect for those looking to add a modern extension to their garden&#33; This all-purpose garden room has been designed and built for year round use, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise fro...
    View Product
    Save £500.00
  8. Mercia 3m x 6m Insulated Garden Room (with FREE Installation)
    Mercia 3m x 6m Insulated Garden Room (with FREE Installation)
    £11,599.99
    £10,999.99
    More info

    Mercia 3m x 6m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 3m x 6m is perfect if you're in need of a home office, additional living space or somewhere to accommodate guests. has been designed and built for year round use, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise fr...
    View Product
    Save £600.00
  9. Mercia 4m x 4m Insulated Garden Room (with FREE Installation)
    Mercia 4m x 4m Insulated Garden Room (with FREE Installation)
    £10,199.99
    £9,599.99
    More info

    Mercia 4m x 4m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 4m x 4m perfect for those looking to add a modern extension to their garden&#33; This all-purpose garden room has been designed and built for year round use, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise fro...
    View Product
    Save £600.00
  10. Mercia 4m x 5m Insulated Garden Room (with FREE Installation)
    Mercia 4m x 5m Insulated Garden Room (with FREE Installation)
    £11,100.99
    £10,499.99
    More info

    Mercia 4m x 5m Insulated Garden Room (with FREE Installation)

    Description:
    <p>This 4m x 5m perfect for those looking to add a modern extension to their garden&#33; This all-purpose garden room has been designed and built for year round use, thanks to the Eco-quilt insulation that features in the walls, roof, and floor. The walls are consisting of three layers, a 16mm tongue and groove outer layer, a 44mm gap in the middle that is filled with insulation, and a 12mm tongue and groove inner wall. The thick walls mean heat is trapped in and any entering noise fro...
    View Product
    Save £601.00
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Why Choose an Octagonal Summer House?


Suited for large or small gardens, they have an eye-catching design that will add a touch of style to your outdoor space. Effortlessly fitting into many positions of your garden from the corner to the center. A great benefit is that some have 4 windows giving you plenty of light to enjoy on a beautiful day.