10–20 sqm Garden Room Examples

You’ve told us you’re considering a medium-sized garden room (typically around 10–20 sqm), so we’ve gathered examples of medium-sized garden room buildings we’ve featured over the years.

At this size, there’s often more freedom in how the space is planned. These examples are intended to help you explore:

  • Different layout approaches and zoning ideas
  • How the building sits within the garden as a feature in its own right
  • Material palettes and detailing
  • Door and window layouts that influence light, views, and flow

Not every company featured will work in your area, but many readers find this page helpful for understanding what’s achievable within this size range.

You’ll also see clearer distinctions between:

  • Pre-designed ranges, offering a faster route with structured options
  • Fully bespoke designs, where layout, proportions, and detailing are fully tailored
Anthracite Hardie Plank cladding and uPVC doors and windows sit well with the natural tones of the garden

Cosy Garden Rooms Art Studio in Derbyshire

The intersection between the Millboard cladding and the Sedum roof is nicely detailed

5.4m x 3m Garden Office by Little Green Rooms

5.4m x 3.5m Family Room by Sanctum Garden Studios

5.4m x 3.5m Garden Room Creates Year-Round Family Space

The plastered and decorated walls and ceiling are paired with a feature wall of wallpaper

Year-Round Garden Sitting Room in Poole

The owner has created a stylish, well appointed salon in their garden

Garden Hair Salon from the Ultra Range by Smart Modular Buildings

The owner has a lovely connection with the garden as she works

Artist Studio Garden Room in Warrington

The mix of sedum plants that Green Retreats use creates a thick luscious covering

Green Roof Option for the Green Retreats G Range

Garden2Office office and music room with an industrial feel

Industrial-Styled Garden Office and Music Room by Garden2Office

The school office was completed by Executive Garden Rooms on a turnkey basis

School Office Building by Executive Garden Rooms

6m x 3m insulated garden cabin by Rustic Realities

Insulated Garden Cabin by Rustic Realities

A corner configuration of floor to ceiling glazing has been paired with a skylight window

Medium-Sized Art Studio by JML Garden Rooms

The multi-function garden room is finished with maintenance free finishes so will maintain its appearance in the long term

Better Than an Extension: A Multi-Functional Garden Room