Planning Permission for Loft Conversions – How Does It Work?

March 13, 2014 1:47 pm

loft conversion living room

While planning permission varies according to your area and your home, unless you have a special case (ie. You live in a conservation area or have a listed building), it’s likely that you’ll be able to complete your loft conversion without having to apply for planning permission. As of 2008, extensions of up to 2 storeys can be added onto homes as long as they fall within the limitations set by the legislation on permitted developments.

Permitted developments must:

  • Provide less than 40 cubic metres of additional roof space (for terraced houses)
  • Provide less than 50 cubic metres of additional roof space for detached and semi-detached houses
  • Not extend beyond the plan of the existing roof
  • Not be higher than the highest point of the existing roof
  • Not use materials that aren’t already found within the house
  • Not include verandas, balconies, or raised platforms
  • Use obscured glass for side-facing windows

There are other requirements and building regulations that ensure your loft conversion is safe and structurally sound. Technical guidance can be found on the government planning portal, but if you have any questions simply get in touch.

When Do I Need Planning Permission?

It’s always a good idea to double check the requirements for your area. However, even if you do not live in conservation area you would need planning permission if you want to exceed the limitations of a permitted development, if you want to make significant changes to your roof, and if there have been changes already made to your home as permitted developments.

Roof extensions aren’t allowed under permitted developments for homes that are in areas of outstanding natural beauty, national parks, conservation areas, world heritage sites, and listed buildings.

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