London’s Pure Basements provide the complete basement construction and conversion service from start to finish. We understand your vision and take you through the enture planning and design process, through to excavation and construction of the shell, plus waterproofing, damp control and completion. We believe in providing a personal service and working with the client face-to-face in order to understand and deliver your vision.

Free Consultation

We will arrange an appointment with you for one of our experienced design surveyors to meet at the project site. The purpose of this initial meeting we will be to carry out a brief survey of the site, discuss the cellar conversion or basement construction project and make appropriate recommendations. We will offer suggestions and ideas for the space to be constructed. We will discuss all options with you and endeavour to get a quote to you within two working days.

Planning Application

A Building Permit is required for basement construction, cellar conversion or alteration, unless the changes are strictly cosmetic. With all building work, the owner of the property (or land) in question is ultimately responsible for complying with the relevant planning rules and building regulations (regardless of the need to apply for planning permission and/or building regulations approval or not). Therefore, failure to comply with the relevant rules will result in the owner being liable for any remedial action (which could go as far as demolition and/or restoration).

The general advice is to always discuss your proposals with the relevant Local Planning Authority and Building Control Service before starting work. You can apply for planning permission online through the Planning Portal or we can apply in behalf of you by completing the relevant forms, attaching supporting documents and plans and paying the application fee.


Following the approval of your planning application, if your project involves significant structural works, a structural design and calculation may have to be done by an engineer. With a highly experienced and proven design team around us, including architects, engineers and interior designers, London’s Pure Basements can offer you any level of design input you require to create your perfect basement.

If you already have architects or engineers you wish to use, you may come to us with planning in place. London’s Pure Basements are more then happy to work alongside other professionals to achieve your desired basement.
Project Management
Construction of the project will be of the highest quality. All works carried out by London’s Pure Basements will be subject to approval by the Local Authority Building Control Department. The construction process of the project is overseen with experience and high levels of knowledge in building and basement construction. Our project manager is based on site on a daily basis having input on all jobs at every level and dealing with clients directly. He will set out the works on site and make sure that everything is being done to the design.

Around him we have built up a highly knowledgeable, experienced and loyal team who take a huge amount of pride in their work.