Expert Garden Room Builders in Sussex From Home Gyms to Garden Offices

At The Garden Room & Annex Company, garden rooms are not a passing trend for us. They are the result of nearly 20 years of hands-on experience, careful craftsmanship and a genuine love for creating spaces that improve everyday life.

We built our first garden room in Brighton almost two decades ago. That early project sparked a craft we have been perfecting ever since. Today, we design and build high quality garden rooms across Sussex and Surrey, helping homeowners create beautiful, practical spaces that sit comfortably in their gardens.

From compact city gardens to wide open rural plots, we bring the same care, creativity and precision to every build.

Designed around how you live and work

Every project starts with a conversation. Some clients come to us wanting a quiet outside garden office so they can work without distractions. Others are looking for a garden office and gym that gives them flexibility throughout the day. We also design dedicated gym shed for garden spaces, studios and guest annexes.

Your ideas shape the build. We look at how you plan to use the room, how your garden works and what budget feels comfortable. The result is a garden room that feels personal, well considered and built specifically for you.

We believe a garden room should enhance your home rather than overwhelm it. That is why our designs focus on proportion, light and flow, so the building feels like it belongs where it sits.

Garden offices that make working from home easier

A well-designed garden office can completely change the way you work. Stepping into a separate space helps create a clear boundary between work and home life.

We build garden offices that are comfortable all year round, with proper insulation, electrics and heating. Natural light is carefully planned to reduce glare while still keeping the space bright and uplifting.

Many clients choose an outside garden office because it gives them peace and privacy without the need to move house or extend. With the right design, it becomes a place you actually enjoy spending time in, not just a place to sit at a desk.

Home gyms and gym sheds built to last

A garden room gym offers convenience, privacy and long-term value. No queues, no travel time and no monthly fees.

Whether you want a multi purpose garden office and gym or a standalone gym shed for garden use, we design the space to suit your training style. Ceiling height, ventilation, flooring and sound control are all carefully considered so the room performs properly.

We also pay close attention to how the gym looks and feels. Many of our clients want a calm, motivating environment rather than something harsh or industrial. With the right materials and layout, a home gym can feel like a retreat.

Craftsmanship you can see and feel

Quality is at the heart of everything we do. From the structural build to the finishing details, our standards are meticulous.

We use materials chosen for durability and performance, not just appearance. Joinery is precise, insulation is thorough and every element is installed with care. This attention to detail ensures your garden room stays comfortable, efficient and attractive for years to come.

Our experience allows us to spot potential issues early and resolve them before they become problems, keeping the build process smooth and stress free.

Styles that adapt to your space

Drawing on two decades of experience and client preferences, we have developed a refined range of garden room and annexe styles. These designs give you a strong starting point while remaining fully customisable.

Layout, cladding, glazing and internal finishes can all be tailored to match your taste and your garden. Whether you prefer something modern and minimal or warm and traditional, we help you shape a space that feels right.

Aftercare that continues beyond the build

Our relationship with clients does not end when construction finishes. We include a six-month aftercare visit as standard.

This allows us to check that everything is performing perfectly and make any small adjustments once the building has settled. It is part of our commitment to delivering lasting quality, not just a good first impression.

Trusted garden room builders in Sussex and Surrey

With nearly 20 years of experience, we have built a reputation for honesty, reliability and craftsmanship. We understand that inviting a team to work in your garden requires trust, and we take that responsibility seriously.

If you are looking for a custom garden room in Sussex or Surrey, whether it is an outside garden office, a garden office and gym or a gym shed for garden use, we are here to help.

Get in touch with The Garden Room & Annex Company today to start the conversation and see how we can transform your garden into a space that truly works for you.