The UK's Independent Guide to Garden Rooms & Annexes
Honest advice, real projects, no selling. Everything you need to research, plan, and buy with confidence.
The Garden Room & Annexe Guide is the UK's leading independent resource for anyone considering a garden room, garden office, garden gym, or granny annexe. We cover costs, planning permission, construction quality, and how to choose the right company, with hundreds of real completed projects from a wide range of companies to browse.
Ready to find a company?
Browse our directory of experienced UK garden room and annexe specialists.
Please also select your location to search.
Latest case studies & guides
Real garden room and annexe projects from companies across the UK, newly featured on the site.
Where would you like to start?
Garden Rooms:
I'm new to garden rooms
What are they, what do they cost, do I need planning permission?
How much does a garden room cost?
Typical costs based on real supplier quotes, across different sizes.
Do I need planning permission?
Permitted Development rules, building regulations, and what to check.
Find a garden room company
Browse our directory of UK garden room companies, filtered by location and type.
Garden Annexes:
I'm new to garden annexes
What is a garden annexe, how does it differ from a garden room, and what does it involve?
How much does an annexe cost?
Typical costs for studio apartments, one and two-bedroom annexes, based on real supplier data.
Getting approval for an annexe
There are two routes to obtaining approval for a garden annexe.
Find a garden annexe specialist
Browse companies that specialise in garden annexe design and build.
Explore by garden room type
Why use our guide?
Independent
We are not a garden room company. We don't sell buildings or take commission. Our advice is entirely independent.
Real projects
Hundreds of completed garden rooms and annexes featured in detail — so you can see what's actually been built at every size & budget.
Buying with confidence
From planning permission to construction quality, we cover everything a buyer needs to know before committing to a company.
UK-wide
Companies, projects, and planning guidance covering England, Scotland, Wales, and Northern Ireland.
Find a garden room or annexe company
Browse our directory of UK garden room and annexe companies — filterable by location, building type, size, and construction method. All companies are editorially reviewed.
Browse our directory of experienced UK garden room and annexe specialists.
Please also select your location to search.