Plan Then Build

Garden room / outbuilding cost in Yorkshire and the Humber

Yorkshire and the Humber build costs run at 90% of the UK national average, across councils including Leeds, Sheffield, York. A 20m² example at mid-range spec: £66,922–£90,542. Adjust the size and spec below for your project.

Permitted Development & Cost Checker

England only. Takes about a minute.

Garden room / outbuilding cost by size and spec in Yorkshire and the Humber

SizeBasicMid-rangePremium
15£34,855–£47,157£50,192–£67,906£71,879–£97,249
20£46,474–£62,876£66,922–£90,542£95,839–£129,665
30£69,711–£94,314£100,383–£135,813£143,759–£194,497

Does a garden room / outbuilding need planning permission?

Council planning fees in Yorkshire and the Humber

Each council sets its own fees and decision times. See your council’s page for the exact figures.

Garden room / outbuilding cost in other regions

Cost bands refreshed quarterly from published 2026 UK cost guides.