Ensuring you have Planning Permission to Start your Project

One of the main attractions of a loft conversion for homeowners lies in the fact that planning permission from council authorities is seldom required. Since the space is already present in the home and little to no building work is required, you are often free to start work without worrying about receiving a green light for your home renovations.

That said, it pays to always check with your local authority planning permission is required. For example, certain types of loft conversion do require you to have planning permission in place before you can undertake any conversion work.

We always suggest getting the experts involved early to advise. Even if your loft conversion is likely to be a permitted development it is best to get it designed out properly from the outset and get confirmation from your local council that it is permitted by way of a Lawful Development Certificate. This requires your home designer to submit an application on your behalf.

In any event, detailed structural designs and calculations are always required for Building Control approval whether your loft conversion is permitted or not. So get your expert in early to advise.

Rely on The Architects Of London to secure loft extension planning permission

When working with The Architects Of London, you can rest assured that we will do the hard work of checking – and securing – planning permission from your local council. We’ve worked alongside the planning authorities all over London for many years, and have established professional relationships that help smooth the whole planning application process. What’s more, thanks to our expertise and experience in providing loft conversions, we are always able to draw up plans and designs that suit the requirements of planning authorities.

When will I need planning permission for my new loft?

Investing in a loft conversion is one of the simplest and most cost-effective ways of adding value to your home. For the most part, loft conversions are considered a permitted development, but only if a number of stipulations are met. These include:


  • Volume allowance of 40m3 of additional roof space for terraced homes (50m3 for detached and semi-detached properties)
  • No extension beyond the plane of the existing roof slope of the principal elevation fronting the highway
  • Extensions not to exceed the highest part of the roof
  • All materials should be similar in appearance to the existing property
  • Verandas, balconies, and raised platforms are not permitted
  • Any side-facing windows to be obscure-glazed and any opening to be 1.7m above the floor
  • Aside from hip to gable options, extensions are to be set back at least 20cm from the original eaves


Additional conditions and regulations are in place – such as for listed buildings and where protected species may be nested. The best way to ensure that any and all stipulations are met is to work alongside The Architects Of London to draw up plans and loft conversion designs. Our team of London architects will even be able to provide a free consultation to further detail any potential work, and will be able to liaise with planning councils where necessary.

Find out more on our experience in loft extension planning permission

To take the first steps towards renovating your home with a brand new loft conversion, contact The Architects Of London today. We have the knowledge and expertise to help secure planning permission for any work, and will help you design the perfect loft conversion for your home. Simply submit an online enquiry form today or call us on 0203 930 9093.

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What you will get in this Home Improvement guide:
  • Top tips on the pitfalls to be avoided
  • Information on what type of extension to go for
  • Detail on what will bring you most value
  • How to avoid cowboy builders
  • Industry secrets you need to know
  • All the steps involved in extending your home
  • Everything you need to know to create your dream home

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