A1 ensures that our clients benefit from the high standards of service and client satisfaction provided by our design, technical and build teams. Whether you are looking for a rear, side or double storey extension, the reasons for choosing A1 are endless.

Our Expertise – We have a wealth of experience in loft extensions, loft conversions and the design and construction of extensions.

Customer Service – Customer service is our priority and we are 100% committed to our clients and their projects, which is reflected in our achievements. It is also why you will have a project coordinator providing full project management at every step.

Choice – We will provide all the options. The final choice is yours and your designs and planning will be completely bespoke.

Our Superior Design – Our technical team will offer you innovative solutions for your space and design and will visit you at your home to discuss your plans in detail should you wish.

Guarantee – Full guarantees are provided for all your work.

Security – There are no hidden costs, payments are safe and will be held in a dedicated project account and monies are only used in relation to your project.

All our teams will work closely with you, combining quality design, craftsmanship and sustainability to create your dream extension, enhancing your lifestyle and your home.

Our in house teams will obtain planning permissions on your behalf and keep you fully informed of progress from day one through to completion. We offer a dedicated customer support team to ensure that you are confident and comfortable.

Your extension will be unique and your specifications will be adhered to.

You get excellent building quality at competitive prices.


A kitchen is the main focal point of any home. At A1, we believe a kitchen extension with A1 is more than just an extension. We not only take your vision and make it a reality, but with every project we take on; we aim to achieve the ‘wow’ factor.

Dining Living Rooms

If you’re looking for a kitchen diner or a separate dining room altogether, there are a number of options and features available to achieve the ‘wow’ factor.


A bathroom is the second focal point when it comes to selling your home. Our bathrooms and shower rooms are designed with you in mind. A1 will work with you every step of the way to build your dream bathroom, from plumbing all the way through to the finishing touches.

“We are so pleased with our extension. Malcolm and his hard working team delivered our vision. Malcolm’s practical guidance proved invaluable when making decisions during the course of the build. As with any build there were a few bumps along the way but Chiara was always on hand to trouble shoot and keep our project on track.
Hetal, Twickenham, 25th March 2015