About MJ Rooney

We are a family-run construction company that has been building London basement Conversions and Civil Engineering Projects for 35 years. We have an amazing team of in-house Architects, Engineers and Construction Managers. We have the best team to deliver your basement conversions.  

As members of ASUC and the PCA we are regularly audited by independent experts to ensure we hit the highest technical and health & safety standards. To sequence every London basement conversion projects and Civil Engineering Projects perfectly we make a computer 3D model and simulation of the build to solve design issues before we even start on site.

Our construction company specialist Waterproofing in-house team will design and install waterproofing all wrapped up in a 10-year insurance-backed guarantee. MJ Rooney has won lots of construction awards like Constructions News ‘Contractor of the year’, Ground Engineering Contractor of the Year, and Digital Contractor of the Year. We deliver quality with a passion to every London basement conversion, Building Construction, and Civil Engineering Projects.
 
Our Services: 
We have a wide range of services built around a core business of London basement conversions and a wide range of Civil Engineering Projects and groundworks processes. Our construction company has been providing high spec finishing and Building Construction works to deliver our clients their dream Architectural finishes. Our Basement conversion, Civil Engineering and Building Construction services are enhanced with digital technologies to make us efficient and competitive with a guarantee of technical excellence.
 
Basement Conversion:
MJ Rooney is an Award-winning London basement conversions company with 35 years experience. We build every type of basement from retrofit basements to new build basement construction. We offer 10-year insurance-backed guarantees on all basement conversions and are one of London’s leading Basement Waterproofing Contractors.
 
Construction:
MJ Rooney offers a wide range of Building Construction services and will achieve the most technical and complex of Building Construction projects. Our Building Construction projects range between small local extensions and multi-million football stadia.  
 
Civil Engineering:
MJ Rooney offers a wide range of Civil Engineering Projects from small local underpinning to large infrastructure schemes. We design and build our Civil Engineering Projects with cutting-edge technologies to deliver quality, speed and efficiency.
MJ Rooney is one of London’s best Basement waterproofing Contractor. All of our basement waterproofing services are installed in-house with our highly trained basement waterproofing team. All basement waterproofing is designed by our CSSW surveyors with Professional Indemnity insurance. The basement waterproofing installation is also covered by 10-year insurance-backed guarantees for complete peace of mind.