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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. 
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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
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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.

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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:

Banana Leaf
  • Sedum green roofs

  • Solar panels

  • Halo lighting

  • Wall mounted radiator

  • Track lighting

  • Aluminium windows and doors

  • Bespoke wall coverings and wallpaper graphics

  • ​Windows with integral blinds

  • Higher than standard buildings

Banana Leaf
  • Roof lanterns

  • External lighting options

  • Drinks bar

  • Additional electrical components

  • Composite and timber grip decking

  • ​Skylights, pitched roofs and bi-fold doors

  • ​Composite vertical slat, stone and brick cladding

  • Underfloor heating and air conditioning​

  • ​Internal partition walls and doors

NEW! Charred timber cladding now available!

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

Brad and Lucy

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

Zac and Jen

"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 Findon family

"The team at Cosy Garden Rooms truly listened to our vision and brought it to life. It has exceeded all our expectations."
"It's been a fantastic experience and exceeded my expectations."
"They listened to what we wanted rather than sell what they had"

Julie and Gary

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

Amy and Garreth

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

Ian and Sue

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

Clowns Nursery

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

Alvechurch Middle School

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

Stuart and Lee

"They were very professional but very approachable which was nice"
"We got exactly what we wanted and it was good value for money."

Ron and Fliss

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Leave your details and we'll be in touch with a  FREE bespoke, no obligation quote 

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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.

Frequently asked questions

Take the first step to owning your own dream garden room... 

Fill in your details and we'll be in touch with a FREE bespoke, no obligation quote 
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