Find companies who can bring your annexe vision to life

Use the filters below to discover companies who design and build in your area — from studio apartments to multi-room homes tailored around your needs and garden, with different planning routes and architectural styles.

Find companies who can bring your annexe vision to life

Find companies who can build the type of living annexe you have in mind and work in your area

Living in a Garden Annexe

A garden annexe can be designed around the space you have and how you want to live. From compact open-plan studios to spacious multi-bedroom homes, layouts are tailored to suit your lifestyle and future needs. Built with multi-layer insulated structures, annexes provide comfortable, energy-efficient living all year round. You can choose your preferred kitchen and bathroom layouts, finishes, and fixtures, and accessibility features can be subtly incorporated to create a home that’s both practical and future-proof.

Where Garden Annexe Companies Work

Not every garden annexe company operates nationwide. When you search by location, you’ll see companies that have told us they work in your part of the UK. While they may not be based nearby, many have dedicated installation teams who regularly travel for projects. This is common in the annexe industry, and experienced companies are well-versed in managing the logistics of delivering and installing fully equipped homes across the country.

Garden Annexe Sizes and Layouts

You can filter by the layout of rooms to find designs that best suit your needs, whether that’s an open-plan studio or a multi-bedroom home. When it comes to size, many companies offer a flexible range of standard footprints, while bespoke designers can create buildings tailored down to the millimetre to make the most of your available space.

For reference:

Open-plan studio annexes – One flexible space with an ensuite bathroom, where areas for sleeping, relaxing, and cooking can be defined with furniture.
One bedroom – A separate bedroom alongside a main living and kitchen area, with an ensuite bathroom.
Two bedrooms – A floor plan arranged to create two distinct bedrooms, ideal for couples or visiting family.
Three or more bedrooms – Larger layouts divided into multiple bedrooms with additional bathrooms or utility spaces, creating a complete home within the garden.

Garden Annexe Design Routes

Garden living annexes can be bought in two main ways:

Pre-Designed – Some companies offer pre-designed annexe ranges with a selection of finishes and layout options. This is often the quickest route to creating a fully fitted, comfortable home.
Bespoke – A designer will start with a blank sheet, working with you to develop the ideal layout, style, and specification for your family and garden. Bespoke doesn’t necessarily mean more expensive—it simply allows for complete personalisation.

Garden Annexe Approval Routes

There are two main approval routes for creating a habitable garden annexe. Most of the companies featured will manage this process for you as part of their turnkey service, while others can provide detailed drawings for you to work with a planning consultant:

Full Planning Permission and Building Regulations – Required for annexes designed as permanent homes.
Mobile Home under the Caravan Act with a Lawful Development Certificate – Used when the annexe is classed as a mobile home incidental to the main house.

Some companies specialise in one route, while others will explore both simultaneously to maximise your chances of approval. You can use our filters to search for companies by approval route.

Garden Annexe Project Management

When buying a garden living annexe, many people prefer one company to handle the full process—from foundations and utilities through to completion. Others choose to organise certain elements, such as groundwork or service connections, independently. You can use our filters to find companies that match your preferred level of involvement and service.

Garden Annexe Rooflines

Annexes are typically available with either a mono-pitched or dual-pitched roof.

Mono-pitched designs tend to have a contemporary aesthetic and can suit modern garden settings.
Dual-pitched designs offer a more traditional appearance and can create a vaulted ceiling internally, giving a greater sense of space.

Some companies offer both, while others specialise in one style, so it’s worth deciding which best fits your preferences and property.

Garden Annexe Core Structures

The two most popular structural systems are used for insulated annexes are:

SIPs (Structural Insulated Panels) – Highly insulated panels that form the floor, wall, and roof structure. They are precision-manufactured and assembled quickly on site, offering excellent energy efficiency.
Insulated Timber Frame – A traditional system of layered framing, insulation, and cladding. This approach offers design flexibility and ensures year-round comfort.

Both produce strong, durable homes, and your choice often depends on whether you prioritise construction speed or flexibility in finishes and layout.

Garden Annexe Site Challenges

Not every garden is straightforward, but many companies are experienced in managing complex sites. Our filters let you find specialists who can tailor their designs to suit your garden’s conditions.

Common challenges include uneven or sloping ground, which can be addressed with adaptable foundation systems, and proximity to trees, where protective measures are taken for both the roots and the structure. If your garden has an irregular shape, certain designers can create angled or L-shaped annexes to make the best use of the space while maintaining a natural flow between the building and the garden.