Quality Garden Rooms & Annexes | Home Offices & Living Spaces | Room Outside®

Quality Garden Rooms & Annexes

Beautifully Designed Extra Living Space

Exceptional quality garden rooms and annexes: from home offices and gyms to independent living accommodation. Traditional oak or modular – five times faster and more efficient.

Talk to a Garden Room Specialist Get Your Garden Room Quote

Call us anytime on 01243 538999 – David our digital assistant will take a few details so the right specialist can follow up personally.

Price From
£25,000
Build Time
2-4 Weeks (Modular)
Energy Efficiency
5x UK Average
Guarantee
10 Years
Quality garden room with oak frame and large glass doors - Room Outside UK
From £25,000

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.

Key Benefits

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
Get Your Garden Room Quote
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 Faster Build

Factory-engineered precision with no cutting on site. Screw pile foundations mean your annexe is completed five times faster than traditional methods.

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, we have the perfect solution.

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

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.

Garden room used as a home office with desk and natural light
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 the perfect space for your garden.

Talk to a Garden Room Specialist Get Your Garden Room Quote

Call us anytime on 01243 538999 – David our digital assistant will take a few details so the right specialist can follow up personally.