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
The doors have been positioned at the corner of the building creating a unique porch detail

Corner-Door Redwood Garden Office in Lincoln by Cabin Master

5.8m x 3.6m garden room taller than standard to allow for the owners gym equipment

Gym, Home Office and Bar in One Garden Room

Western Red Cedar has been used on the front elevation paired with dark grey Hardie Plank composite cladding

Cedar Garden Office with Store and Through Access for a London Garden

The 5m x 2.5m garden room has been finished externally in Hardie Plank Heathered Moss cladding

Teenagers Den in the Garden with Storage

Example of the Curved Range by Warwick Buildings

The Curved Range by Warwick Buildings

4m x 3m Crusoe Garden Room designed as a creative studio, pilates room and occasional guest room

A Crusoe Garden Room: The Extra Space Solution

The garden room has been divided to create two rooms - the sitting room and a changing room for the hot tub

Garden Sitting Room with Hot Tub Changing Room

Cabin Master's client chose the light grey Marley board finish for the exterior of their office

4.8m x 3m Marley Board Garden Office by Cabin Master

Hardie Plank in Evening Blue has been used externally

Garden Office and Music Room with Soundproofing

PRIMO by A Room in the Garden

Swap a Summerhouse for a Garden Room You Can Use Every Day of the Year

The finished garden room with its black slatted cladding chosen to replicate the finish on the kitchen extension

Garden Room Designed for a London Terrace With No Direct Access

The front elevation has been clad in vertical Western Red Cedar tongue & groove (TGV)

Bespoke Garden Office with Porch and Store