About Us

London Based Construction Company Specialising in Conversions, Extensions and Refurbishments

about us, About
about us, About

What We Do

From back extensions to commercial to residential conversions, we work with architects to create projects that stand the test of time. Our team work from end to end, meaning when your plans and property is given to us, we’ll hand it back ready to use.

Our team can cover the following services and more as part of any given project; structural steel works, electrics, plumbing, carpentry, roof construction, brick wall building, floor construction, partition walls, built in wardrobes, painting, and more.

Our Core Values


With over 15 years of experience in the sector, we’ve refined our skills, services and suppliers to only provide the highest quality projects


Whether it’s your first or thirty-first project with us, you can expect the same great standards from our team. We’ll be there when you need us 


No two projects are the same. We’ll work with you to complete your project, no matter how extensive your requirements

Our History

Our founder, Adam, moved to London from Poland over 15 years ago with the aim of starting his own business. With many years of experience in the construction sector, as well as a genuine passion for the work, creating WA Building System was a natural choice.

Over the years, his attention to detail and expertise in the sector has gained him a reputation for quality and reliability. With a team of like-minded employees on board, the company has grown and grown.

But, there has been one thing missing. Our clients haven’t all shared Adam’s passion for exceptional construction. That’s why, today, we often work in collaboration with architects.

Architects share our passion for delivering excellence that endures past our lifetime. At WA Building System, we’re proud of each and every project we complete.

about us, About

Whether it’s your first or thirty-first project with us, you can expect the same great standards from our team. We’ll be there when you need us

about us, About

Adam,  Founder

Our Services





Yes, WA Building System Limited is fully insured company.

Yes, all WA Building System services, upon completion, come with a guarantee for peace of mind. However, we are confident that our work will outlast generations.

All of our services depend on project size and complexity. Upon an in-person evaluation of the property, we will be able to give you a more accurate timescale and ensure it meets your timings.

We advise to submit an application to the local authority at least 4 months before your ideal start date. The approval process usually takes 8 weeks, but you should allow between 6 to 8 weeks to prepare and submit plans.

It is certainly possible. However, it can be a complex process depending on the age, size, and design of the current extension. Typically, it is simpler and more cost-effective to demolish the old extension and rebuild it.

Yes, WA Building System is known for high quality and reliable end-to-end construction service. Our team consists of expert building specialists who possess the qualifications and experience to carry out all aspects of construction, refurbishment, and decoration.

At WA Building System, our team is trained to work all year round and in every weather condition – rain, hail, or shine. However, there are occasional exceptions on external works such as roofing and foundation when poor weather poses a safety risk to our team.

We understand it may be frustrating to be let down by another contractor, and WA Building System will always do our best to help you. We will take on any challenge, but would need to resurvey the project to ensure any works previously conducted by others were to the same high standard that we provide.

No, there is no minimum value requirement. We are passionate about what we do, and are happy to take on any job, no matter the shape or size. For more information, please get in touch with us at EMAIL, or get a quote using the form below.

As with any building works, there can be unexpected costs. Additional costs most often arise from customers changing design or material choices, or uncovering structural faults during the later stages of the project. However, we are transparent with our clients about these from start to finish, and communicate them as soon as possible to ensure you are fully informed.

Yes, we take pride in respecting all properties by removing any waste and, where possible, disposing of it in a sustainable way. We don’t just do this at the end of the project, but at the end of every working day.