Digital BrochureBespoke garden buildings · Nationwide
Bespoke garden rooms, offices, gyms, entertainment spaces and self-contained annexes — designed around your lifestyle and built by our own team.
Who we are
We don't sell off-the-shelf garden buildings. Every LouMil building is drawn up for one garden, one purpose and one customer — then built and installed by our own team.
A building can be designed for virtually any use, and shaped around the space you have available, how you intend to use it, the finishes you prefer, your door and window configuration, internal layout, electrical requirements, heating and climate needs — and the way you actually live.
Possibilities
Flexible, fully finished spaces designed around you.
Explore Garden Rooms
Professional, insulated year-round workspaces.
Explore Offices
Private training, wellness and spa spaces.
Explore GymsGames rooms, bars, cinemas and social spaces.
Explore Entertainment Spaces
Professional hair, beauty and treatment spaces.
Explore Salons
Self-contained living with bedrooms, bathrooms and kitchens.
Explore AnnexesThe work
Every building below was designed around a real customer's space, requirements and lifestyle. Explore the projects to see what is possible.
Bespoke commercial build
A front-of-house reception building designed from scratch for a luxury pet resort — proof that our work goes far beyond conventional garden rooms.
Entertainment space · 8m x 6m
A large entertainment room with a bespoke bar, slatted feature wall and bifold doors that open the whole space to the garden.
Gym & spa
A private gym and spa built to a hotel standard, with a sauna, wet room and feature finishes throughout.
Designed around the occupant
A one-bedroom annexe planned around the occupant's specific requirements — an accessible layout throughout, with a kitchen and wetroom.
Annexe · approx 60m²
A genuinely self-contained home in the garden: two bedrooms, open-plan living, a full kitchen and a family bathroom.
Explore garden rooms, gyms, offices, salons, entertainment spaces and annexes we've completed across the UK.
Garden annexes
Our annexes are bespoke, self-contained living accommodation — designed for parents, adult children, guests, independent living, multi-generational families and additional living space. Every annexe is planned around the plot and the person who'll live in it.
Planning requirements vary by property and intended use — we'll talk you through what applies to your site rather than making assumptions.
Specification
A garden room should feel like part of your home — not an upgraded shed.
The base structure, fully installed by our own team.
Select what you want in the calculator and the price updates as you go.
Specifications differ by build type. The lists above relate to the garden buildings priced through our online calculator. Fully bespoke garden rooms and self-contained annexes — including bathrooms, kitchens, plumbing and specialist fit-outs — are specified and quoted individually, and come with a 10-year structural & roof guarantee.
Bespoke by default
You're not choosing from fixed models. Every element is a decision you make.
Built around the space you actually have, not a fixed catalogue footprint.
French doors, sliding doors, bifolds and custom window arrangements.
Timber shiplap, standard composite or slatted composite in a range of colours.
Flooring, lighting, heating and internal layout tailored to how you'll use it.
Bathrooms, kitchens, salons, bars, gyms, saunas, offices and more.
Inspiration
Why us
No revolving door of subcontracted installation crews.
Designed around you, not forced into a fixed model.
A clear quotation agreed before the project begins.
Structural & roof guarantee on every building we deliver.
Explore genuine completed builds before you decide.
From structure through to internal finishing.
Social proof
5.0 on Google · 47 reviews
Testimonials
Verified reviews from real homeowners on Google.
The process
Tell us the size, purpose and specification you're looking for.
Use the online calculator or speak with us to receive your quotation.
We agree layout, finishes, doors, windows and project details.
Our own team manufactures and installs your garden building.
Your completed building is handed over ready for its intended purpose.
Investment
Garden buildings start from £9,000 inc. VAT, and your final price depends on the specification you choose. The calculator prices it live as you build it — nothing hidden.
Personalise your building and see your price as you design — no obligation.
Annexes and fully bespoke builds are quoted individually — price up an annexe here.
Choose your size, style and specification and get an instant price for your own LouMil garden building.
No obligation • Bespoke design • Fixed pricing
From a compact garden office to a complete self-contained annexe, we'll design the space around you.
Start My Project
