Business Details
25 Years
experience
Trusted HVAC Contractors in Stockton-on-Tees
Established in 2001, LJJ Ltd is a multi-disciplined building services contractor specialising in mechanical, electrical, and public health services. We operate nationally across Great Britain, delivering professional solutions for commercial, industrial, public sector, retail, and communal housing projects. Our expertise spans design, installation, and commissioning, supported by a 70m annual turnover and a commitment to quality, health and safety, and environmental sustainability.We offer planned preventative maintenance to ensure compliance and operational efficiency, backed by a dedicated team and a 0% staff retention rate. With offices in Stockton-on-Tees, Coventry, and Crawley, we combine technical excellence with client-focused service delivery.
Services
Mechanical Services
Electrical Installations
Public Health Systems
HVAC Solutions
Planned Maintenance
Details
- Year established: 2001
Highlights and features
- We have over 20 years of experience in mechanical and electrical contracting.
- Our national service covers all major sectors including commercial and industrial.
- We offer planned preventative maintenance to ensure compliance and efficiency.
- Our quality policies are implemented on all projects to guarantee standards.
- We maintain a 0% staff retention rate, ensuring project continuity.
Services
Mechanical Services
We design and install mechanical systems including heating, ventilation, and air conditioning for commercial and industrial buildings. Our solutions ensure energy efficiency and compliance with health and safety standards. Clients benefit from reduced operational risks and long-term cost savings.
Electrical Installations
Our electrical services cover high and low voltage installations for new builds and refurbishments. We ensure adherence to industry regulations, providing reliable power distribution and lighting solutions tailored to client requirements across sectors.
Public Health Systems
We deliver comprehensive public health systems, including water supply, sanitation, and drainage solutions. Our work meets statutory requirements, ensuring safe and sustainable infrastructure for communal housing and commercial developments.
Planned Maintenance
Our planned preventative maintenance ensures ongoing compliance with manufacturers' guidelines and health and safety legislation. This proactive approach minimises equipment failures, avoids legal penalties, and maintains operational continuity for clients.
HVAC Solutions
We provide end-to-end HVAC solutions, from design to commissioning, tailored to commercial and industrial needs. Our systems optimise indoor environmental quality while adhering to energy efficiency and sustainability standards.
People
Lee Rennison
CEO
Lee Rennison leads LJJ Ltd with over two decades of experience in building services contracting. He drives strategic growth while maintaining a focus on quality, safety, and client satisfaction across national projects.
Questions
What sectors does LJJ Ltd work in?
We serve commercial, industrial, public sector, retail, and communal housing sectors with mechanical, electrical, and public health solutions.
Do you offer maintenance services?
Yes, we provide planned preventative maintenance to ensure compliance, reduce risks, and maintain system efficiency for clients.
Where are your offices located?
Our head office is in Stockton-on-Tees, with regional offices in Coventry and Crawley covering central and southern England.
What is your company's turnover?
LJJ Ltd has a planned annual turnover of approximately £70 million, reflecting our capacity for large-scale projects.
Are you committed to sustainability?
Yes, we operate with environmental and sustainability policies, ensuring responsible practices across all projects and operations.
