Garden Room Extension Cost: What to Budget For

A garden room extension in the UK typically costs between £20,000 and £50,000 in 2026, depending on the size, specification, and what is included in the quote. For a fully insulated, year-round building with electrics and internal finishing, expect to pay £1,500 to £2,200 per square metre. That puts a 12 sqm garden room at…

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Does a Garden Room Add Value to Your House?

Yes, a garden room does add value to your house. According to estate agents and property experts across the UK, a well-built garden room can increase your property’s value by between 5% and 15%. On a home worth £300,000, that means an uplift of £15,000 to £45,000. On a £400,000 property, you could be looking…

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Garden Room Cost Per Square Metre: Full Pricing Breakdown

A fully insulated, professionally built garden room in the UK costs between £1,200 and £2,500 per square metre in 2026. The exact figure depends on the size of the room, the specification you choose, and what is included in the quote. Smaller rooms cost more per square metre because fixed costs like foundations, electrics, and…

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garden office buildings

Garden Room Cost Guide 2026: What You’ll Really Pay

After building over 1,000 garden rooms across South East London, Kent, Surrey, and Sussex since 2004, we know the question everyone asks first: how much does a garden room cost? The honest answer is that it depends on size, specification, and how much your supplier includes in their quoted price. This guide gives you the…

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Maxi Garden Office in Petts Wood, Orpington 2

Can You Build a Garden Room in a Conservation Area?

Yes, you can build a garden room in a conservation area. In most cases, a garden room placed in your rear garden will still fall under permitted development, even on conservation area land. But there are extra restrictions you need to know about, and in some cases you will need planning permission. Here is what…

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How Close Can a Garden Room Be to a Boundary Fence?

You can build a garden room right up to your boundary fence, provided the total height does not exceed 2.5 metres. If you want a taller building, you must keep it at least 2 metres from the boundary. That is the short answer. The longer answer involves building regulations, fire safety, the Party Wall Act,…

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