Bespoke Garden Annexes & Mobile Homes in Sussex

At Creating Spaces Garden Rooms, we design and build high-quality, fully compliant garden annexes and mobile homes across Sussex — ideal for multi-generational living, guest accommodation, home offices with full facilities, or future-proofed lifestyle needs.

Each build is crafted by our award-winning team and includes full planning, building regulations, utilities, and finishing — giving you total peace of mind from day one.

What Is a Garden Annexe?

A garden annexe is a fully self-contained living space located within your garden — typically featuring:

  • Kitchen and bathroom

  • Living area with one or two bedrooms

  • Insulation, electrics, lighting and heating throughout

Unlike basic garden rooms, annexes are classed as habitable spaces and therefore:

  • Require Building Regulations approval

  • May require planning permission, depending on size and placement

  • Offer real, long-term value — whether for family, guests or personal use

At Creating Spaces Garden Rooms, we handle the entire process — from concept and permissions to full installation and final sign-off.

What’s Included as Standard

Every annexe we build includes:

  • Full turnkey service — foundations, electrics, plumbing & finishes

  • Detailed planning submission & construction drawings

  • Building Regulations compliance

  • Energy-efficient insulation and heating

  • LVT flooring, fitted kitchen (with appliances) and luxury bathroom

  • Modern glazing: 3m sliding doors + panoramic window

  • Silicon render exterior – durable, low maintenance, high-end look

  • Flexible layouts, lighting and plug point options

  • Huge range of interior and upgrade options available

Modern living room with natural wood accents, white sofa, glass sliding doors opening to a lush garden patio with outdoor furniture and greenery.
Modern wooden house with large glass sliding doors open to a lit interior living room, outside patio with potted plants, surrounded by greenery and trees at dusk.

Mobile Homes – Legal, Flexible & 0% VAT

We also build mobile homes in line with the Caravan Sites Act and BS 3632 residential spec — allowing more flexibility and legal benefits:

  • Can be placed without planning in many cases

  • 0% VAT-rated when used as permanent residential units

  • Movable design (delivered in one or two sections)

To qualify, your garden mobile home must:

  • Be movable and used incidentally to the main dwelling

  • Include a kitchen, bathroom, and permanent living capability

  • Be located within the curtilage of your home

  • Be built to BS 3632 specification

We’ll guide you through this process and can apply for a Certificate of Lawful Use to give you full legal clarity and protection.

Planning & Building Regulations — We Manage Everything

Whether you’re building a permanent annexe or a mobile home, we handle:

  • Planning applications or permitted development checks

  • Full Building Regulations compliance (structure, fire, plumbing, electrics)

  • Coordination with Building Control officers

  • Certificates of Lawful Use (when applicable)

  • Utility connections and groundwork

Modern house with wooden exterior and black accents, featuring large sliding glass doors, surrounded by a well-manicured lawn and trees.

Areas We Cover

We build annexes and mobile homes throughout West Sussex and East Sussex, including:
Chichester, East Preston, Rustington, Ferring, Worthing, Shoreham-by-Sea, Brighton, Hove, Lancing, and surrounding villages.

Pricing & Sizes

A fully fitted, luxury one-bedroom annexe starts at just £75,000, which includes:

  • Planning or lawful use applications

  • Foundations, drainage, electrics

  • Full interior fit-out

  • Final Building Control sign-off

Typical annexe sizes range from 30 m² to over 60 m², with endless layout and finish options to suit your needs.

Modern wooden house with large glass sliding doors, interior lit with warm lighting, chairs and a sofa visible inside, surrounded by trees and a well-manicured lawn with stepping stones leading to the entrance.
Modern living room with a white sofa, wooden coffee table, and a built-in kitchen with black cabinets and wood accents. Large sliding glass doors open to a green backyard.

Why Choose Creating Spaces?

  • Award-winning design & build team

  • Building Regulations & BS 3632 compliant

  • Transparent pricing — no hidden costs

  • In-house planning, design & construction

  • Trusted across Sussex with dozens of successful builds

  • Planning & legal expertise built in

We believe your annexe or mobile home should be beautifully built, fully compliant, and completely stress-free — and we deliver on that promise.

Start Your Project Today

Looking to create a garden annexe or mobile home for your family, future or flexibility?

📩 Get in touch today for a free consultation and site assessment.