Basement Conversions

A basement or cellar conversion creates space without touching your garden or roofline — ideal in areas where extending out or up is restricted. We convert and, where needed, lower and underpin cellars into dry, warm rooms with proper waterproofing.

What's included

Structural waterproofing (tanking + cavity membrane)
Sump, pump and drainage system
Underpinning and lowering where required
Insulation, damp control and ventilation
Electrics, lighting and heating
Full fit-out and building-control sign-off

Correct tanking and drainage is everything below ground, so we specify a full waterproofing system with a pump and membrane, then insulate, service and finish the space. Every job is designed with structural and building-control input.

Basement Conversions — frequently asked questions

Can any cellar be converted?

Most existing cellars can be converted; creating a brand-new basement is a bigger structural job. We assess yours at survey.

How do you stop a basement being damp?

We install a full waterproofing system — tanking or a cavity-drain membrane with a sump and pump — guaranteed to keep the space dry.

Do basement conversions add value?

Done well, yes — usable dry space below ground can add significant value, especially in higher-value areas.

Is planning permission needed?

Converting an existing cellar usually is not, but lowering floors or adding light-wells can be. We check and apply if required.

Basement Conversions across the UK

We provide basement conversion for homeowners and landlords across England, Wales and Scotland. Popular areas include:

Basement Conversions in West Midlands Basement Conversions in Greater London Basement Conversions in Greater Manchester Basement Conversions in West Yorkshire Basement Conversions in Staffordshire Basement Conversions in Warwickshire Basement Conversions in Worcestershire Basement Conversions in Cheshire Basement Conversions in Leicestershire Basement Conversions in Kent Basement Conversions in Surrey Basement Conversions in Essex

See all areas we cover →

What's included

Basement Conversions — frequently asked questions

Basement Conversions across the UK

Get a fixed quote for your basement conversions