Gain useful space without ignoring what is below
Layout follows the structure
We assess headroom, access and floor-lowering options before fixing the plan.
Room needs are included
Ventilation, sound control and specialist fittings are planned for actual use.
A realistic first phase
Initial construction and waterproofing averages between 8 and 12 weeks.
Turn unused lower space into a proper room
A basement conversion can create a bedroom, office, playroom, gym, cinema, studio or living area without extending the footprint above ground. Commercial spaces and self-contained rental accommodation can also be considered. The design starts with what the existing basement can support. We assess structure, headroom, access, damp, ventilation and your intended layout before planning structural preparation, waterproofing and internal finishes. Where more height is needed, floor lowering may involve underpinning or benching. Those choices affect usable floor area, construction and programme, so they must be settled before the attractive finishes arrive.
Waterproofing and room use planned together
Below-ground rooms need more than dry walls. We integrate tanking or cavity drainage with ventilation, floor construction and the final use of the space. A pool-related project may need careful shower and moisture planning, while studios can require soundproofing and occupied rooms need suitable airflow. The initial construction and waterproofing phase averages 8-12 weeks. The full programme depends on basement size, condition, access and the chosen fit-out, so we set expectations after inspection rather than promising a fixed finish date. All our installed waterproofing systems include a 10-year guarantee.
Frequently asked questions
How long does a basement conversion take?
The initial construction and waterproofing phase averages 8-12 weeks. The overall programme varies with basement condition, dimensions, structural alterations, access and the level of internal finishing required.
Can we increase the headroom in a basement?
Potentially. Floor lowering may be achieved through underpinning or benching, depending on the structure and layout. We assess the building, available width, access and desired ceiling height before discussing a suitable route.
What can a converted basement be used for?
Possible uses include bedrooms, offices, gyms, playrooms, cinemas, studios and living rooms. Commercial rooms or self-contained accommodation may also be considered, with ventilation and specialist details planned around the use.