Annexes & Garden Rooms

Beautifully Designed Extra Living Space
Exceptional Quality Annexes & Garden Rooms
While the terms Annexes and Garden Rooms are sometimes used interchangeably, there is an important distinction:
– A garden room is usually a versatile space in the garden — perfect as a home office, gym, or retreat.
– An annexe is a more substantial structure, often designed as independent living accommodation for a family member, growing teenager, or visiting guests.
At Room Outside®, we specialise in creating both — from standalone oak-framed garden rooms to fully designed annexes that can either connect to your home or sit independently in the garden.
We’re very excited to now be able to blend our new modular extension units with premium materials such as aluminium, uPVC, or oak. This gives you more flexibility than ever to create an annexe or garden room that truly meets your needs.
Where Tradition Meets State-of-the-Art Technology
Five Times Faster. Five Times More Efficient.
For decades, Room Outside® has been known for beautifully crafted oak annexes, built with warmth, character, and timeless appeal. Today, we’re proud to combine this heritage with state-of-the-art modular technology.
Factory-engineered for precision, our modular units arrive ready to assemble, with no cutting on site — giving you a neater, cleaner build that isn’t delayed by weather. Using innovative screw pile foundations, your new annexe can be completed five times faster than a traditional build, with none of the usual mess. Even better, modular systems are five times more energy efficient than the average UK home, keeping your space comfortable year-round while lowering energy bills.
Stand-alone Oak Garden Rooms
Timeless Tradition
For those who prefer a fully traditional build, we’re proud to continue offering our standalone oak annexes in their classic form. These are constructed in the traditional method, with oak frames complemented by plastered walls and interiors finished to the same standard as your home — a timeless approach that delivers character and comfort in equal measure.
Garden Room Office
A Dedicated Work Space to Enhance Your Productivity
With the rise of remote working, creating a practical and professional workspace has become a priority for many homeowners. A standalone garden room or a garden room extension could be the ideal solution for creating a dedicated workspace at home. Having a separate room, whether completely detached or partitioned by doors, provides the quiet, professional environment needed to achieve the perfect work-life balance. Additionally, your garden room can often be designed for dual purposes, maximising its practicality and ensuring it meets all your needs while enhancing your home’s functionality.