Basement Conversions
Transform your unused cellar or create a brand new basement space — adding valuable living area and increasing your property's worth.
Unlock the Space Beneath Your Home
A basement conversion is one of the most cost-effective ways to add living space to your home without the disruption of an extension. Whether you have an existing cellar that needs converting or you're looking to create a brand new basement, Acorn Basement Conversions has the expertise to deliver outstanding results across Sheffield, Rotherham, Barnsley, Doncaster, and the surrounding South Yorkshire areas.
Areas We Cover
- Sheffield
- Rotherham
- Barnsley
- Doncaster
- Worksop
- Dearne Valley
- South Yorkshire
- Surrounding areas
Types of Basement Conversion
Cellar Conversions
Many older properties in South Yorkshire have existing cellars that are damp, dark, and unused. We transform these spaces into bright, dry, and fully habitable rooms — whether you need a home office, gym, playroom, or extra bedroom. Our team handles all structural waterproofing, tanking, and fit-out work from start to finish.
New Basement Construction
Don't have an existing cellar? No problem. We can excavate beneath your property to create a brand new basement space. This involves careful underpinning, excavation, and structural waterproofing — all carried out by our experienced team using the latest techniques and equipment.
Full Basement Conversions
Our full conversion service takes your basement from raw shell to a beautifully finished living space. We manage the entire project — from initial survey and design through to structural work, waterproofing, electrics, plumbing, plastering, and final decoration. One team, one point of contact, zero hassle.
Why Convert Your Basement?
Add Significant Value
A well-executed basement conversion can add 10–20% to your property's market value — often more than the cost of the work itself.
Gain Usable Space
Create a full extra room or suite without losing any garden space or going through the complexity of a traditional extension.
Avoid Moving Costs
With property prices and moving costs at record highs, converting your basement is a smart alternative to upsizing.
10-Year Guarantee
All our waterproofing treatments come with a 10-year guarantee, giving you complete peace of mind for years to come.
Minimal Disruption
Our experienced team works efficiently to minimise disruption to your daily life throughout the conversion process.
Fully Managed
From survey to sign-off, we manage every aspect of your project so you don't have to coordinate multiple contractors.
Our Conversion Process
Free Survey & Report
We visit your property to assess the existing space, identify any structural or waterproofing requirements, and discuss your vision for the finished conversion.
Design & Planning
Our team produces detailed plans and, where required, handles planning applications and building regulations submissions on your behalf.
Structural Work
Any underpinning, excavation, or structural alterations are carried out by our qualified engineers to the highest standards.
Waterproofing
We apply the most appropriate waterproofing system for your property — tanking, cavity drain membrane, or sump and pump — backed by our 10-year guarantee.
First Fix & Services
Electrics, plumbing, and any HVAC requirements are installed by our qualified tradespeople before walls and floors are finished.
Final Fit-Out
Plastering, flooring, decoration, and all finishing touches are completed to your specification, leaving you with a beautiful, ready-to-use space.
Ready to transform your basement? Call us today on
0330 043 2939