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

Looking for a premium garden room in Maidenhead? Garden Rooms Online designs, builds, and installs bespoke composite garden rooms across Maidenhead and the surrounding Berkshire area. From our base in Flackwell Heath, we're just 15 minutes away — your truly local garden room builder.
Maidenhead is a town on the rise — with the Elizabeth Line connecting to London in under 40 minutes, more professionals are choosing to work from home part of the week. A garden office is the perfect solution for Maidenhead's growing community of hybrid workers. Our composite-clad, fully insulated garden rooms are built to the highest standard, designed to complement Maidenhead's mix of riverside apartments, period homes, and new developments.
Our signature design named after the town — The Maidenhead is a versatile mid-size garden room with a flat roof and full-width bifold doors, designed to maximise natural light — perfect for a home office or gym. Available in anthracite grey or warm oak composite cladding. Sizes from 3.5m x 3m to 6m x 4m.
We cover all of Maidenhead (SL6) and nearby areas including Bray, Taplow, Holyport, Pinkneys Green, Furze Platt, Cox Green, and Boulter's Green. Being based in Flackwell Heath, we're practically next door.
Most garden rooms in Maidenhead fall under permitted development — single-storey, under 2.5m tall within 2m of a boundary, covering no more than 50% of the garden. The Royal Borough of Windsor and Maidenhead generally supports permitted development for garden rooms. Some conservation areas near the town centre and riverside may have additional restrictions. We'll advise on this during your free consultation.