Your London Basement Conversion

Londoners are increasingly expanding into their basements and excavating under their homes to increase their living space.

Iceberg homes are the latest fashion in areas such as Clapham and Wandsworth, where residents are increasing their home’s square footage by over a third with retrofitted, whole-house basement conversions and under-garden basements offer yet more options to expand your London home.

Planning Permission

While stringent planning restrictions are placed on upwards expansion – particularly in conservation areas – only 10% of planning applications for basement conversions are currently rejected. Our architectural partners have a wealth of experience throughout London and are available to handle the entire planning process on your behalf. Their local expertise ensures that consent is gained quickly, without the need to resubmit.

Your Basement’s ROI

Investing in a basement conversion can significantly improve the value of your home, depending on the type and size of conversion. As properties in Central London can sell for up to £2,500 per square foot, the investment in your basement can be tripled. Estimates suggest that a basement conversion in Central London can increase the value of your property by 20%.


Satisfaction Guaranteed

Avian Construction have a 100% satisfaction guarantee – we do not consider your basement complete until you are absolutely satisfied. We have a wealth of experience throughout London,  we have built a reputation for professionalism and excellent customer service; that’s why the majority of our work comes from customer referrals.

In addition to our satisfaction guaranteed, our work, materials, and waterproofing products are all guaranteed for 10 years or more so you can be confident in the quality of your conversion.

If you would like to discuss your options or book a consultation, please get in touch with our team.

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