Basement & Cellar Conversions in Leeds, Wakefield & West Yorkshire

Unlocking Valuable Space With a Cellar Conversion

At Lynch Renovation and Development, we are approved contractors specialising in high-quality cellar and basement conversions, helping homeowners unlock valuable living space within their property. As a family-run business with generational knowledge in the building trade, we combine traditional craftsmanship with the latest products, techniques, and current building legislations to deliver reliable, long-lasting results.

Our comprehensive cellar conversion service includes:

  • Tailored waterproofing solutions – designed to protect your home and maximise your investment using proven systems and best practice
  • Type C drained protection – cavity drain membranes and drainage management to create a dry, usable environment built to modern standards
  • Full project management – from structural works to plumbing, electrics, insulation and final finishes

We understand that every property is different, which is why we provide tailored waterproofing and conversion solutions designed to protect your home and maximise your investment. Our expertise includes Type C waterproofing systems, known as “drained protection”, where water leaking through the structure is accepted into voids and air spaces created by cavity drain membranes strategically placed to the inside of the structure. This system depressurises incoming water and safely removes it from the property, creating a dry, usable environment built to modern standards.

Whether you are transforming a cellar into a living area, home gym, office, cinema room, or additional bedroom, our experienced team is committed to delivering professional workmanship, honest advice, and exceptional customer service from start to finish.

Choose Lynch Renovation and Development for trusted expertise, quality workmanship, and cellar conversion solutions built to last.

Cellar conversion step 1 showing plumbing first fix
Cellar conversion step 2 showing electrical inputs and first fix electrics
Cellar conversion step 3 showing insulation installation
Cellar conversion step 4 showing waterproofing membrane and preparation
Cellar conversion step 5 showing drainage channel and pump system preparation
Cellar conversion step 6 showing finished basement living space
Cellar conversion step showing plumbing first fix
Cellar conversion step showing electrical inputs and first fix electrics
Cellar conversion step showing insulation installation
Cellar conversion step showing waterproofing membrane installation
Cellar conversion step showing drainage channel and pump system
Finished cellar conversion living space
Cellar conversion step showing plumbing installation
Cellar conversion step showing electrical first fix
Cellar conversion step showing insulation and preparation

Cellar Conversion

  • Category: Cellar Conversion
  • Client: Elaine Waugh
  • Project date: January 2025
  • Project URL: Checkatrade Review

Cellar conversion and waterproofing

We chose Lynch Renovation and Developments for our cellar conversion and couldn’t be happier with the result. From the start, the team explained the options clearly and recommended a Type C “drained protection” waterproofing system to create a dry, usable space. The work included managing the waterproofing, installing drainage provisions, and completing the key stages like plumbing first fix, electrical inputs, insulation and finishing. Everything was agreed prior to the start, communication was excellent throughout, and the standard of workmanship was outstanding. Our cellar has now been transformed into valuable living space and we have no problem recommending Andy and his team to anyone considering a basement or cellar conversion.

Basement Conversion FAQs

Everything you need to know about converting your cellar or basement space

Many cellar conversions do not require planning permission if there are no major external or structural changes. However, excavation, changes to external light wells, listed buildings, or conservation areas may require consent. We can advise during your site visit.

We specialise in Type C waterproofing systems, also known as drained protection. Water entering through the structure is managed behind cavity drain membranes and safely directed to drainage channels and pumps, creating a dry, usable space built to modern standards.

Costs vary depending on the condition of the cellar, the waterproofing requirements, access, and the finish you choose. We provide a detailed, tailored quote after a site inspection and discussion of your plans.

Most cellar and basement conversions take around 6 to 10 weeks depending on the waterproofing specification, structural work, and final finishes. More complex projects may take longer.

A converted cellar can become a living area, home gym, office, cinema room, hobby space or an additional bedroom. We tailor the design, waterproofing and finishes to suit how you want to use the space.