Basement and Cellar Conversion
Suited for Victorian and Edwardian houses with unused, damp cellars. We install cavity drainage membrane systems, sump pumps, insulation, and fire-rated plasterboard ceilings. You gain a dry home office, gym, or spare bedroom without losing garden ground.
What is included
- ✓Wall and floor preparation with fungicide wash
- ✓Cavity drain membrane installation (Type C waterproofing)
- ✓Dual sump pump station and alarm setup
- ✓Floor insulation and floating timber screed
- ✓Acoustic and fire-rated ceiling boarding
- ✓Mechanical heat recovery ventilation installation
Book an Initial Site Consultation
We will review your property details and contact you to schedule an inspection date.
Why Work With Alden Renovations
Convert damp underground cellars into dry, warm, and habitable living space
BS 8102 Compliance
Our dual-pump cavity membrane systems meet British Standard recommendations for habitable basements.
Warm and Usable Rooms
Proper floor and wall insulation prevents condensation and keeps basement temperatures stable.
Maintained Head Height
We plan slimline floor build-ups to preserve ceiling clearance in low-ceiling Victorian basements.
Workmanship Standards and Snagging
We do not request final payment until every item on your written scope is inspected and signed off. Any defects arising from our installation work within twelve months are rectified by our team at no cost to you. Pricing & payment
Questions about this service
Will a converted cellar smell damp?
No, because the membrane holds back damp while continuous trickle ventilation circulates fresh air.
What happens during a power cut with the sump pump?
We install battery back-up units that run the pumps for hours if mains power drops.
Do I need planning permission to convert a basement?
Converting an existing cellar without changing the exterior usually falls under permitted development, but lightwells require permission.
Feedback From Property Owners
Alden Renovations handled our full ground floor renovation including structural wall removal and replastering. The site manager kept daily noise contained, and the finish on the joinery remains pristine after four months of family use.
Alistair M., London, GBWe booked them for a complete bathroom and kitchen overhaul. The itemised quote meant no surprise invoices, and the tiling alignment was executed with precision. A minor delay on tile supply was handled proactively.
Fiona T., Manchester, GBThe team renovated our Victorian flat, restoring cornicing and leveling uneven floor joists. Six months in, everything is solid with zero hairline cracks along the joinery lines. Direct communication throughout.
David K., Bristol, GBAll services
Discuss Your Refurbishment Project
Send us your drawings or tell us what you want to change in your home. We review your details and call you back within twenty-four hours to discuss realistic budgets.