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Expert Plumbing & HVAC Services in Brentwood, Essex
Sjbmechanical is a family-run business with over 25 years of experience in the mechanical and building services industry. Based in Brentwood, Essex, we serve domestic and commercial clients across Essex, Greater London, and surrounding areas. Our fully qualified engineers specialise in air conditioning, plumbing, heating, gas systems, and renewable energy solutions, including air source heat pumps and solar panels. Accredited by Gas Safe, the Institute of Plumbing & Heating Engineers, and MCS, we deliver high-quality installations, repairs, and maintenance for clients ranging from private homeowners to major organisations like the Hilton Hotel Park Lane and the American Embassy.

Our commitment to excellence is reflected in our client testimonials, which highlight our professionalism, attention to detail, and cost-effective solutions. We pride ourselves on minimising disruption while ensuring projects meet the highest standards, combining technical expertise with a customer-centric approach.
Services
Air Conditioning Plumbing Heating Gas Engineers Air Source Heat Pumps Ground Source Heat Pumps Chilled Water Systems Boiler Installation Underfloor Heating Drainage Repairs
Highlights and features
  • 25 years of experience in mechanical and building services.
  • Gas Safe and Institute of Plumbing & Heating Engineers accredited.
  • Family-run business with a focus on customer satisfaction.
  • Approved installers for major manufacturers like Mitsubishi and Daikin.
  • 24/7 emergency response for urgent repairs.
Associations and certifications
  • Gas Safe Registered
  • Institute of Plumbing & Heating Engineers
  • Refcom
  • City & Guilds
  • F-Gas
  • Microgeneration Certification Scheme (MCS)
What people say
Excellent job Very professional Reasonable price Delighted with result Highly recommend
Services
Air Conditioning
We design, install, and maintain energy-efficient air conditioning systems for domestic and commercial properties. Our Refcom-registered engineers work with brands like Mitsubishi and Daikin to ensure optimal climate control. Regular servicing prolongs system lifespan and maintains energy efficiency.
Plumbing
Our Gas Safe and Institute of Plumbing-accredited engineers handle all plumbing needs, from bathroom installations to drainage repairs. We integrate building work to ensure seamless project completion for residential and commercial clients.
Heating Systems
We install and service central heating, underfloor heating, and renewable energy systems. Approved by manufacturers like Vaillant, we ensure efficient, compliant solutions for homes and businesses.
Gas Installation
Gas Safe-registered engineers provide safe installations, repairs, and certifications for domestic and commercial gas systems, including boiler upgrades to modern condensing models.
Air Source Heat Pumps
MCS-certified installations of air source heat pumps reduce energy bills and carbon footprints. We integrate systems with underfloor heating and assist clients with renewable incentive schemes.
Questions
What services does SJB Mechanical & Building Services offer?
We provide air conditioning, plumbing, heating, gas systems, and renewable energy solutions like air source heat pumps.
Are your engineers accredited?
Yes, we are Gas Safe Registered, Institute of Plumbing & Heating Engineers members, and MCS-certified.
Do you offer emergency services?
Yes, we provide 24/7 emergency call-outs for urgent repairs.
Which areas do you cover?
We serve Brentwood, Essex, Greater London, and surrounding regions.
Can you help with renewable energy incentives?
Yes, our MCS-certified installations qualify for government renewable heat incentive schemes.