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Basement Impact Assessments (BIA)

So you thought it would be nice to look at a possible basement. You have started the standard process of getting planning approval and now they have asked for a Basement Impact Assessment . . . what’s all that about?

Basically the council want to confirm that when you excavate a sizable hole that its affects have been considered.  Quite a sensible approach really.  Different boroughs have different criteria and levels of information, but they mainly want to know:


Croft Structural Engineers can help throughout the project:  Our main role is the design and construction of basements but we have tailored our service to help with BIAs.  Unlike our competition (geotechnical or environmental companies) Croft Structural Engineers will be helping you throughout the project.  It is not uncommon that the engineer at the first meeting producing the BIA will be the one undertaking the final design and then inspecting the construction.  Such integration in the projects life has proved invaluable on numerous occasions.

Our BIAs are designed to help with two processes.  They are not simply a tool to achieve planning.  We have designed our BIA to be a useful tool in the final proposed developments.  We are looking to work with and continue the project from the planning stages through, design, party wall and final construction.  As engineers we will be integral to all of these crucial stages.

At Croft Structural Engineers we have completed over 300 basements.  The practice has been involved in over 100 BIAs.  We have a wealth of knowledge that allows us to undertake and complete BIAs.

When there’s a problem companies such as London Basement, Advantage Basements, Cranbrook Basements, London Underground, Oxford and London Building Consultancy, Basement Force and Orbital come to us for their advice.  We are the experts that the experts come to.