Basement conversions are an excellent option for securing a profitable return on your investment whilst also utilising any existing unused space within your current footprint when 'building out' doesn't allow! The innovate concept of 'building down' is becoming ever more popular with homeowners, especially within London & surrounding areas.


Here at NBI, we can extend or convert existing cellars/basements or completely excavate, install & create a completely brand new basement. This could create a new self contained flat, gym, swimming pool area, home cinema or an addition of many new rooms & extra floor being added to your property - generously increasing the value of your overall home & space.

• Existing Basement Conversations (Retrofit)

• Full Footprint Basement Conversations 

• Half Footprint Basement Conversations 

• Sub Basement Conversations 

• Damp Proofing Systems 

Please get in touch today to obtain further information regarding how we can assist you with turning your dream home into a reality, where our price is competitive and the quality of work proven to be next to none.

Contact us today


If you have a project you'd like to discuss, please get in touch. There's no obligation. Just give us a call or if you'd rather email, simply complete the form.

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