Planning Permission Tips

By 4th May 2017Advice

We understand that building a garden room, whether it be a traditional conservatory or contemporary orangery, can take a lot of planning and design consideration. It can be especially daunting if the prospect of planning permission and building regulations arise.

We’ve put together a small summary of reasons why you might need to obtain planning permission.


  • No more than half the area of land around the “original house” would be covered by additions or other buildings
  • No extension forward of the principal elevation or side elevation fronting a highway
  • Singly storey extensions must not extend beyond the rear wall of the original house by more than 3 metres if it’s an attached house or no more than 4 metres for a detached house
  • Maximum height of a single-storey rear extension of four metres
  • Side extensions to be single storey with a maximum height of four metres and a width no more than half that of the original house
  • No verandas, balconies or raised platforms

We recommend that if you are unsure of the rules regarding your home, you refer to the Planning Portal. You may also need to get in touch with your local planning office.

Our experience

During your journey with Marston & Langinger, we can offer to undertake all planning negotiations for you, including planning permission, building regulations, approvals and any other necessary permissions required for the installation of your Marston & Langinger structure.

Having completed countless applications over the years, we can anticipate most eventualities, our success rate is over 95%! You can view some of our projects on our case studies page including the ‘Sky Blue Conservatory‘ which required planning to extend on a Grade II* listed property, building an iconic structure that reflected the original timber conservatory and retained the lines of the house.