Cellar & Basement Conversion Services

In most cases, yes. If your cellar has enough headroom or can be excavated to create sufficient space, it can usually be converted into a dry, usable area. We’ll carry out an initial inspection to assess the structure, moisture levels, and suitability for conversion before providing a detailed plan of action.

Absolutely. Damp or even flooded basements can be successfully converted. We specialise in waterproofing and cavity membrane systems that manage and redirect water safely, creating a completely dry and habitable space. Even heavily affected cellars can be fully restored and transformed.

Yes. Even if a basement appears dry, ground moisture and hydrostatic pressure can build up over time. Professional waterproofing is essential to ensure the space remains permanently dry and protected. We design systems tailored to your property’s construction and intended use.

A Cavity Membrane System (CMS) is one of the most reliable methods of basement waterproofing. It involves installing studded plastic membranes across walls and floors, creating an air gap that stops moisture from reaching interior finishes. Any water that seeps through the structure is safely channelled into a drainage system and away from your property. This approach is effective because it controls water rather than trying to block it - ensuring long-lasting protection.

The process begins with a full survey and design plan, assessing structural integrity, waterproofing needs, and layout options. We then install the chosen waterproofing system - typically a cavity membrane - followed by insulation, flooring, and wall finishes. Plumbing, electrics, and joinery are fitted next, and the space is decorated to your chosen specification. Finally, we carry out thorough quality checks to ensure everything is dry, safe, and ready for use.

Yes. We manage the entire project from start to finish, including damp proofing, waterproofing, plastering, plumbing, electrics, and joinery. Our experienced team coordinates every stage of the process, so you don’t need to worry about organising multiple contractors.

Every project is unique, but most cellar conversions take between 4 to 8 weeks to complete, depending on the size, existing condition, and additional features such as plumbing, electrics, or custom finishes. We’ll provide a detailed schedule and keep you updated throughout.

In most cases, planning permission isn’t required for converting an existing cellar into a living space, as it typically falls under permitted development. However, if you’re lowering the floor level, altering the structure, or your property is listed or in a conservation area, planning approval or building regulations consent may be necessary. We’ll guide you through any permissions needed.

Your conversion must comply with building regulations covering waterproofing, ventilation, insulation, fire safety, and structural stability. Our team works closely with local authorities to ensure all work meets the required standards and certification.

Yes. All damp proofing and waterproofing work carried out by Bowland Damp Proofing is covered by a written guarantee for your peace of mind. We also offer insurance-backed guarantees through our Crown Biokil accreditation, providing added security and long-term confidence in the quality of our work.