Basement Planning Permission

Avian’s team have worked throughout London for over a decade. Over this time, we have completed hundreds of basement conversions and formed excellent relationships with RIBA qualified architects who can manage the entire planning process on your behalf.

In most instances, your basement conversion will require planning permission. We always ensure that your basement conversion gets as much natural light as possible, so there may be minor changes to the exterior of your home to create light wells for the basement.

If you prefer to work with your own architect or to submit planning applications yourself, we will provide as much support as you require to ensure that the process goes smoothly. Only around 10% of planning applications in London are rejected, and resubmitting the application with minor changes often ensures that the project can continue. However, this process can be time consuming which is why we often recommend that you work with our partners to benefit from their proven track record.

Detailed Drawings

Our architects will put together detailed drawings for your new basement and carry out any necessary investigations such as tree reports, noise surveys, and flood risk assessments. These must all be submitted together to provide all of the information necessary for your local authority to make a decision. The information is also essential to ensure that the build can continue without unnecessary delays or interruptions.


Party Wall Agreements

If you live in a terraced or townhouse in London it is likely that you will need to put a party wall agreement in place with your adjacent neighbours. This protects you and your neighbour against issues if there is any damage to their property – as part of the process, a Party Wall Surveyor will take pictures of the wall on both sides to prevent any possible disputes in future. This process can take as little as a few minutes if you have a good relationship with your neighbours – we recommend that you discuss it casually before asking for an official to serve the paperwork as it’s more likely to be agreed quickly.

We work with a highly experienced party wall surveyor, and will provide a referral upon request.

ANY QUESTIONS? CALL 020 3174 1241
Case Studies

Loft Conversions Add a Fifth to Property Values

Loft conversions are one of the best ways to make your home more spacious – an intelligently-designed conversion can add as much as 30% more living space to your home without extending the footprint of your house. As with all home improvements, conversions also increase the value and sale-ability of your home. A study by […]

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The client wanted to make extensive improvements to her home in Wandsworth, including a loft conversion, a kitchen extension, and alterations to her existing lounge and one of the existing bedrooms. All of the work took around 12 weeks and they were extremely happy with the results.  


Avian Construction Ltd

Peterden House
1A Leighton Rd
West Ealing
W13 9EL

020 3174 1241