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Why move from your ideal location when you could increase the usable area of

your home with a beautiful house extension? Our house extensions have turned countless London properties into the perfect place for their owners, removing

the need to go through the stress and expense of finding a bigger house in the same or a similar area.


Loft Conversions


Turn your London property into the home of your dreams with a stunning loft conversion. We’re experts in every aspect of domestic property development, from design and planning permissions to project management, building works and high quality finishing. Our managers are qualified civil and structural engineers and our tradespeople are handpicked from the best local builders. We’ve created loft conversions for every purpose, expanding the existing living area of homes and building separate flats and luxury apartments.


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Our spectacular property refurbishments transform every room in your home, bringing tired older properties to life and turning standard domestic properties into masterpieces of interior design. Repurpose your home, or refurbish a domestic property for sale or letting. With an extensive portfolio of creative, high-end refurbishments and a highly qualified team of experienced project managers and tradespeople at our disposal, 'ASE Design and Build' can manage any refurbishment in any building.


Architectural &
Structural Design


We specialise in structural and architectural design services for residential and commercial building projects such as extensions and loft conversions. Our expertise in structural engineering and architectural design is a core part of the fully guaranteed service that we offer our clients in both the domestic and commercial sectors.



See what our customers say


ASE Design and Build - Construction Blog


Loft conversion and techniques

10th June, 2019 I Posted by ASE Design and Build Ltd.

Many people are working from home now. Loft conversions for office space is getting very popular. Especially if the loft conversion can add significant value to your property. Now, when the new regulations come into force, most people can do a loft conversion without having to...

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Free up some space

3rd Feb, 2020 I Posted by ASE Design and Build Ltd.

One of the most effective ways to get a little free space without shelling out a huge chunk of money is to add a layer of extra space or loft. All houses can make use of this extra space either for storage or as an...



Hire the best loft conversion and extension specialist in South West London

Knowing that your building has a loft and letting it remain unused for the rest of your life translates into missing out on the potential returns on your investment. Most homeowners are unaware of the ways to optimize the unused loft space in their building. This is the where 'ASE Design and Build' can help homeowners maximise what they may have been ignoring for a long time.

How a loft conversion helps

Loft conversion is a process that certainly helps in converting the available loft space into a room that can be put into use rather than simple storage. A loft conversion is a house extension without adding to the dimensions of the building. In these instances there are exclusions which mean you don’t need planning permission, but in cases where it is needed, we have vast experience and can help with submitting paperwork.

ASE Design and Build as a loft conversion and extension company

'ASE Design and Build' have many years experience and many happy customers in projects from loft conversions and extensions, house extensions, renovations and much more. Being one of the most reputable construction companies in South West London, 'ASE Design and Build' will achieve stunning results within your budget.

What else you can expect from us

'ASE Design and Build' can help you with your house extension project and within budget. We are here to address each of your concerns and structure a suitable plan that will meet with your affordability. There are many services we offer including but not limited to refurbishment, house extensions, structural design and every minor to major renovation. Contact us today to see how we can help you achieve your project goals.

ASE Design and Build - why choose us?


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Transform your home with an 'ASE Design and Build' loft conversion, extension or refurbishment. We design, manage and build to create beautiful spaces for homeowners in South West London and the surrounding area.

Our project managers are all qualified structural engineers with significant experience working in the UK building industry read more >>

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Contact Us

Unit 205, 29 Castle Street, KT1 1DN

Mobile: 07983 304 952

E-mail: info@ase-construction.co.uk