Cost to build an outbuilding in Kent

Outbuilding cost in Kent

Outbuilding costs in Kent range from the cheapest of £9,880 (GM BUILDING SERVICES based in BR8) to the dearest of £10,416 (Radiant Homes based in BR8), but these are just estimates.

Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.

Get rates and quotes to build an outbuilding in Kent by posting a job with HaMuch and we will send it to extension builders.

"Outbuilding" - SIDCUP, job posted 11/12/25

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Location in UK	Hourly Rate	Daily Rate
Outbuilding near Bexley	£42	£265
Outbuilding near Dartford	£51	£273
Outbuilding near Bromley	£42	£265
Outbuilding near Northfleet	£41	£261
Outbuilding near Sevenoaks	£38	£234
Outbuilding near Grays	£41	£261
Outbuilding near South Ockendon	£58	£276
Outbuilding near Lewisham	£43	£268
Outbuilding near Gravesend	£40	£260
Outbuilding near Greenwich	£44	£268

Estimates for common extension builder jobs in Kent;

Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.