CONVERSION VS EXTENSION: WHAT’S THE DIFFERENCE?

Cellar conversion: Often found below Victorian and Edwardian houses, cellars were originally (and often still are) used for storage, generally featuring exposed brick walls and a distinct lack of waterproofing. If the storey provides enough head-height to allow for conversion into a habitable room, the project will involve waterproofing, improving access and ensuring the room is well-lit.

Basement extension: If a property doesn’t have a below-ground room already in place, then excavating a new subterranean level is considered a basement extension. Retrofitting a new lower storey is generally more complicated than converting a pre-existing cellar, as you’ll be starting from scratch. The job will need extensive work, from underpinning foundation walls and getting rid of all that unwanted soil through to ensuring the correct waterproofing and ventilation is in place.