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Business Details
50+ Years
experience
Emergency
services
Trusted Electrical Contractors in County Durham
Established in 1975, Tomlinson Longstaff has built a reputation as a trusted electrical contractor serving commercial, industrial, and specialist sectors across the North East of England. Our NICEIC-registered team delivers comprehensive services including design, installation, maintenance, and renewable technology solutions. With 26 staff members and decades of combined expertise, we prioritise safety, innovation, and client satisfaction.

Our accreditations, including CHAS and MCS, reflect our commitment to industry standards. We invest heavily in staff training and community engagement, exemplified by our sponsorship of local teams and leadership in promoting sustainable energy solutions. Our managing director, Alicia Reid, brings over 15 years of hands-on experience, ensuring quality control and cutting-edge service delivery.
Services
Electrical Design Fire Alarm Installation Renewable Technologies Maintenance Services Security Systems Lighting Solutions EV Charging Points Inspection & Testing
Details
  • Year established: 1975
Highlights and features
  • We offer 50+ years of combined electrical contracting experience
  • Our team holds NICEIC and MCS accreditations for quality assurance
  • We provide 24/7 emergency response services across the North East
  • Our staff undergo continuous professional development training
  • We pioneered renewable technology installations in County Durham
Associations and certifications
  • NICEIC
  • CHAS
  • Microgeneration Certification Scheme
  • Renewable Energy Consumer Code
What people say
Successful project Exceeded expectations Superb job Professional job Efficient service
Services
Renewable Technologies
We design and install solar PV systems, battery storage, and electric vehicle charging points. Our MCS-accredited team delivers complete renewable energy solutions for commercial and residential properties. Services include site assessments, system design, installation, and maintenance, with options for solar panel cleaning and efficiency optimisation. Our solutions reduce energy costs and carbon footprints while ensuring regulatory compliance.
Fire Alarm Installation
We provide comprehensive fire alarm solutions from conventional to addressable systems. Our services include risk assessments, system design, installation, and maintenance. All installations meet British Standards BS5839 and include tailored maintenance schedules. We offer upgrades, repairs, and testing services to ensure ongoing compliance and safety for commercial, industrial, and residential properties.
Electrical Design
Our design service covers electrical, lighting, and fire alarm systems for commercial and industrial clients. We provide full budgetary control through single-point contact, ensuring consistency from concept to completion. Services include energy conservation planning, compliance documentation, and integration with building management systems. Our designs prioritise efficiency, safety, and future adaptability for new and existing installations.
Maintenance Services
We offer reactive, preventative, and statutory maintenance packages for electrical systems. Services include emergency repairs, scheduled inspections, and compliance testing. Our bundled maintenance solutions combine multiple services for cost savings. We provide 24/7 rapid response for critical issues and maintain client portals for certificate storage and service tracking. Our team handles high-level lighting repairs, machinery maintenance, and breakdowns.
Security Systems
We install bespoke CCTV, intruder alarm, and access control systems. Our solutions range from smart monitored systems to basic alarm setups. Services include site consultation, system design, and integration with existing infrastructure. We work with trusted suppliers to provide scalable security solutions for commercial properties, schools, and residential buildings, ensuring asset protection and regulatory compliance.
People
Alicia Reid
Managing Director
Alicia joined in 2007 as an apprentice and became Managing Director in 2014. She oversees quality control, health and safety, and business development while managing the Small Works Department. With over 15 years' experience, she drives innovation in renewable technologies and client service.
Jill O'Hare
Accounts Manager
Jill has worked with the company for over 30 years, progressing from Clerk Typist to Accounts Manager. She ensures financial operations run smoothly and maintains client records. Her extensive institutional knowledge supports the company's administrative and financial stability.
Sharon Jackson
Office Manager
Sharon has managed office operations since 2002, supporting accounts and reception functions. With prior construction industry experience, she ensures efficient day-to-day office management and client communication, maintaining the company's professional standards.
Questions
What electrical services do you offer?
We provide design, installation, maintenance, and testing services for commercial and industrial clients, including fire alarms, renewable technologies, security systems, and energy efficiency solutions.
Are you accredited electrical contractors?
Yes, we are NICEIC-registered and hold CHAS, MCS, and Renewable Energy Consumer Code accreditations, ensuring compliance with industry safety and quality standards.
Do you work outside County Durham?
While based in County Durham, we serve commercial and industrial clients across the entire North East of England region.
Can you handle emergency electrical work?
Yes, we offer 24/7 emergency response services for critical electrical issues and maintenance requirements.
What renewable technology services are available?
We install solar PV systems, battery storage, electric vehicle charging points, and provide solar panel cleaning and efficiency assessments.
How experienced is your team?
With 50+ years collective experience, our electricians hold modern qualifications and undergo continuous professional development to maintain technical expertise.