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Bespoke composite garden rooms built in Gerrards Cross, Buckinghamshire. Garden offices, annexes, gyms & leisure rooms. Fully insulated, installed in under a week. Free consultation.

Looking for a premium garden room in Gerrards Cross? Garden Rooms Online designs, builds, and installs bespoke composite garden rooms across Gerrards Cross and the surrounding Buckinghamshire area. From our base in Flackwell Heath, we're just 10 minutes up the road — your local garden room specialists.
Gerrards Cross is one of Buckinghamshire's most sought-after locations, known for its large gardens and leafy setting — ideal for a garden room. Whether you're looking for a garden office, annexe, gym, or leisure room, our composite-clad builds are designed to maximise your outdoor space without compromising on style. We understand the local property styles and build rooms that complement both period homes and modern builds.
Our signature design named after the town — The Gerrards Cross is a compact, efficient garden room perfect for smaller plots. With a footprint starting at just 3m x 2.5m, it delivers maximum functionality in a minimal space. Ideal as a home office or treatment room. Available with flat or pitched roof options.
We cover all of Gerrards Cross (SL9) and nearby areas including Chalfont St Peter, Chalfont St Giles, Fulmer, Iver, and Hedgerley. Being based in Flackwell Heath, we're practically neighbours.
Most garden rooms in Gerrards Cross fall under permitted development — single-storey, under 2.5m tall within 2m of a boundary, covering no more than 50% of the garden. Some parts of Gerrards Cross are within the Chilterns Area of Outstanding Natural Beauty, which may impose additional restrictions. We'll advise on this during your free consultation.