Extra Large Garden Rooms

Atrium Garden Rooms - Bespoke garden rooms in Leighton Buzzard, Aylesbury, St Albans and Watford., expertly designed and built
EXTRA LARGE (from 20 - 24 m²)

Discover our extra large garden rooms.

Extra large garden rooms represent the ultimate way to add substantial living space to your property without the disruption of a traditional extension. Offering expansive interiors and endless design possibilities, they provide a premium environment that can be tailored to almost any lifestyle requirement. Whether you're looking for a dedicated workspace, a private wellness retreat, a luxury entertainment room, or a multi-functional family space, an extra large garden room delivers the freedom to create something truly exceptional.

Garden rooms and outbuildings over 15m² may require Building Regulations approval, depending on their size, location, construction and intended use. Planning permission may also be required if the building does not meet Permitted Development rules. We can advise you on both before your project begins. As they are built to achieve the same standards as a regular house, these can be utilised as an extension or stand-alone unit. We can help you through the process, get in contact today.

Designed for homeowners who need more than just additional room, these larger garden buildings offer the flexibility to accommodate multiple zones within a single structure. You might combine a home office with a meeting area, create a fully equipped gym alongside a relaxation space, or design a games room complete with a bar, cinema area, and social seating. The generous footprint allows you to maximise functionality while maintaining an open, spacious feel. Need an alternative size? Other size options available.

EXTRA Large Garden Rooms

Extra large space
endless possibilities.

An extra large garden room creates opportunities that smaller buildings simply cannot offer. The additional floor space allows for dedicated areas for work, leisure, fitness, creativity, and entertaining, all under one roof. This makes them particularly popular with growing families, remote workers, business owners, and homeowners seeking a luxurious extension of their living space.

Many customers choose an extra large garden room as an alternative to moving house or undertaking extensive renovation work. By transforming unused garden space into a fully functional and beautifully designed building, you can significantly increase the practicality and enjoyment of your home while enhancing its long-term value.

bespoke Extra Large size Garden Room image
bespoke Extra Large size Garden Room image
Garden Offices, Studios & Living Spaces

Why choose an extra
large garden room?

One of the most exciting uses for an extra large garden room is the creation of a dedicated entertainment hub. The generous internal dimensions can comfortably accommodate pool tables, games consoles, cinema seating, home bars, music systems, and social gathering areas, creating the perfect environment for spending time with family and friends. Large glazing options also allow you to maintain a strong connection to the garden and surrounding landscape, bringing natural light into the space throughout the day.

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Year Round Function

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Efficient Installation

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Low Maintenance

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Modern Build

Features

All our garden rooms are built to the same UK Building Regulations and thermal performance standards as a traditional house.

Foundation
An engineered concrete base provides exceptional structural integrity and long-term stability.

Insulation
High-performance insulation throughout the walls, roof, and floor ensures excellent thermal efficiency and year-round comfort.

Doors & Windows
Premium double-glazed aluminium, Timber or uPVC doors and windows deliver outstanding thermal performance, noise reduction and a sleek, contemporary appearance.

Flooring
A wide range of flooring options including engineered timber, laminate, carpet and tiles, allowing you to choose the finish that best suits your space.

Internal Walls
Finished with a smooth plastered and painted surface, or clad in your choice of materials including timber, composite, stone or fabric.

Electrical Works
We will install an independent feed providing a safe, stable and consistent supply to the unit. All electrical
installations are fully certified to current regulations and completed to Part P standards by qualified electricians.

Internal Lighting
We can create any lighting atmosphere you desire, from recessed downlights to perimeter, mood, atmospheric, wall and feature lighting.

Wi-Fi Connectivity
We can integrate a high-performance mesh Wi-Fi system to deliver fast and reliable coverage throughout your garden room/ office.

Heating
Our heating solutions are tailored to your needs and can vary from electric underfloor heating to panel heaters to more comprehensive systems if required.

Cladding
A wide choice of high-quality external finishes including timber, composite cladding and stone panelling, offering both durability and striking aesthetics.

Security
All doors and windows are fitted with secure multi-point locking systems for enhanced protection and peace of mind.

Exterior Lighting
Stylish LED exterior lighting can be designed to create atmosphere, improve safety and enhance the building after dark.

small garden room sketch
table for extra large garden rooms in Leighton Buzzard, Aylesbury, St Albans and Watford.