5x Faster Build
Factory-engineered precision with no cutting on site. Screw pile foundations mean your annexe is completed five times faster than traditional methods.
Room Outside • Established 1973
Quality Garden Rooms & Annexes
Beautifully Designed Extra Living Space
Exceptional quality garden rooms and annexes: from home offices and gyms to independent living accommodation. Choose traditional oak or a modern modular design, tailored to your home and the way you want to use it.
From £25,000Traditional Oak or ModularHome Offices & Living Spaces
Call 01243 538999. David, our digital assistant, will take a few details so the right specialist can follow up personally.
Space for Your LifeGet Your Garden Room Quote
Garden Room or Annexe?
While the terms 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 now blend our new modular extension units with premium materials such as aluminium, uPVC, or oak, giving you more flexibility than ever.
5x faster than traditional build
5x more energy efficient
Screw pile foundations – no mess
Oak, aluminium, or uPVC options
Home office, gym, or annexe
Connected or standalone
Weather-independent build
10-year guarantee
Prices from£25,000
Tradition Meets Technology
Five Times Faster. Five Times More Efficient.
For decades we’ve crafted oak buildings with warmth and character. Now we combine this heritage with state-of-the-art modular technology.
5x Energy Efficient
Modular systems are five times more energy efficient than the average UK home, keeping your space comfortable year-round while lowering bills.
Weather-Independent
Modules arrive ready to assemble, with no weather delays. Your build stays on schedule regardless of rain or cold.
Premium Materials
Choose from aluminium, uPVC, or oak finishes. The flexibility to match your home’s style perfectly.
Choose Your Style
Traditional or Modular – The Choice is Yours
Whether you prefer timeless craftsmanship or modern efficiency, explore a design suited to your property.
Standalone Oak Garden Rooms
Traditional mortise & tenon joinery
Plastered walls & interior finish
Timeless character & warmth
12-20 week build time
Modular Garden Rooms
Factory-engineered precision
2-4 weeks on site
5x energy efficient
Screw pile foundations
Fully Designed Annexes
Independent living accommodation
Kitchen & bathroom options
Connected or standalone
Full planning support
Project Photography
A Closer Look
Explore the glazing, proportions and garden setting in these two views.
What Could a Garden Room Add to Your Home?
Share your ideas with our team and arrange a free home design consultation.
A Place to Focus
Garden Room Office: A Dedicated Workspace
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.
Work-life balance: Step out of your house and into your office – the physical separation helps maintain boundaries between work and home life.
Expert Answers
Garden Rooms & Annexes FAQs
Common questions about costs, planning and installation.
A garden room is 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, with kitchen and bathroom facilities.
Quality garden rooms typically start from £25,000 for basic specifications, rising to £60,000+ for fully insulated annexes with kitchen and bathroom facilities. Room Outside offers bespoke options from £25,000 fully installed.
Many garden rooms fall under Permitted Development Rights if they meet size and position criteria. Annexes with sleeping and cooking facilities usually require planning permission. Room Outside provides full guidance with every project.
Using our modular system, garden rooms can be completed five times faster than traditional builds – typically 2-4 weeks on site. Traditional oak builds take 12-20 weeks depending on complexity and design.
Yes. Garden rooms are ideal for home offices, providing a quiet, professional workspace separate from the main house. They can be designed with insulation, power, data, and lighting to suit your work needs.
Our modular garden rooms use innovative screw pile foundations – no concrete, no mess, and no digging. This makes installation faster and less disruptive to your garden.
Create Your Perfect Garden Room
Whether you need a home office, gym, annexe for family, or simply a peaceful retreat, we’ll design and build a space for your garden.
Call 01243 538999 — David, our digital assistant, will take a few details so the right specialist can follow up personally.