
Designed to perfectly fit your space
A warm and comfortable annexe for loved ones
Garden ‘Granny Annexe’ buildings are becoming increasingly popular due to their cost-effectiveness and quick installation. These structures offer a warm and safe space for your loved ones, addressing many modern-day housing and care concerns.
A valuable and cost effective investment
A garden annexe, a granny annexe, a teenage den, guest accommodation or Airbnb accommodation are all uses for a fully , building regulations compliant garden room.

Increase your property value by up to 15%
A garden annexe designed for overnight accommodation will require planning permission, as it is considered more than just an ancillary garden building. Planning considerations may vary depending on your location. And adding a garden annexe can increase your property’s value by 5 to 15%, providing a significant return on investment whilst enhancing your property's appeal.
Why choose Cosy Garden Rooms?
Concrete base is standard on all installations
Every project is bespoke to your requirements
Price beating guarantee

Bespoke garden granny annexes
Bespoke garden granny annexes offer unique contemporary living spaces tailored to your needs. They include kitchens and bathrooms, the perfect blend of comfort and functionality, making them an attractive addition to any home and garden.
Transform your garden with a Cosy Garden Rooms garden annexe and enjoy the perfect blend of comfort, functionality, and style.

More options and choices than any other supplier
We believe we are the most bespoke garden room designer and builder in the UK. Innovative, contemporary options include:

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Sedum green roofs
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Solar panels
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Halo lighting
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Wall mounted radiator
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Track lighting
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Aluminium windows and doors
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Bespoke wall coverings and wallpaper graphics
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Windows with integral blinds
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Higher than standard buildings

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Roof lanterns
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External lighting options
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Drinks bar
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Additional electrical components
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Composite and timber grip decking
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Skylights, pitched roofs and bi-fold doors
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Composite vertical slat, stone and brick cladding
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Underfloor heating and air conditioning
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Internal partition walls and doors
Latest case studies

“What we’ve got here is absolutely great value for money, it’s given me exactly what I wanted.”

"We ended up with exactly what we wanted. We use the space all the time and its really added something to the property."

"The garden room is great - a fantastic place to work, a cosy spot to unwind with the family, and a clever storage solution, we love it."

"The team at Cosy Garden Rooms truly listened to our vision and brought it to life. It has exceeded all our expectations."

"The communication is really quick. They are really good at getting back to you, evenings, weekends, nothing seemed too much trouble."

"I’ve not got a bad word to say! They were professional, provided design options, and nothing was too much trouble."

"The installation team were lovely, really friendly, very tidy and worked quickly and efficiently."

"Everyone likes the buildings! They are a natural environment, connected to nature. They are flooded with natural daylight."

"I was so impressed with the service and workmanship. I now have a beautiful fully functioning professional studio."


Benefits of a garden annexe
Increased Property Value: Adds 5 to 15% to your property’s value.
Cost-Effective Living: Affordable alternative to rising care and housing costs.
Customisable Designs: any shape, size or style, modern or contemporary
Quick Installation: Built efficiently by qualified professionals.
High-Quality Construction: Complies with stringent building regulations.
Enhanced Family Support: Keep loved ones close while preserving their independence.




