Experienced Mechanical Engineers
In Brentwood and the South East
For almost 30 years SJB Mechanical & Building Services Ltd have been delivering dependable mechanical engineering and building services across Brentwood, Essex and the wider South East. SJB Mechanical & Building Services Ltd is a family-run business with 25 years of industry experience, and our client list includes names such as the Hilton Hotel Park Lane and the American Embassy in London. We also work with organisations as diverse as Waitrose, John Lewis, HSBC, Savills Property Management, Ealing Council and Bam FM.
From air conditioning and heating to plumbing drainage and renewable energy systems we combine proven expertise with practical reliable workmanship. Our team include Gas Safe F-Gas and MCS accredited engineers with extensive experience in domestic commercial and specialist environments. Whether it is a single-room installation or a full mechanical package for a large-site project every job is approached with precision care and attention to detail.

Mechanical & Building Services for Homes and Businesses
SJB Mechanical provide a complete range of services under one roof. This removes the need for multiple contractors and ensures cleaner project management, consistent workmanship and dependable long-term performance.
Fully Qualified & Registered Engineers
✓ Gas Safe Registered Engineers, Reg No. 231342
✓ Institute of Plumbing & Heating Engineers, Reg No. 65653
✓ Building Services Engineers, Reg No. 1071171
✓ Refcom Certified Air Conditioning Installers, Reg No. 1008463
✓ City & Guilds Qualified Mechanical Engineers
✓ F-Gas Registered Engineers
✓ MCS Accredited Renewable Energy Installers
These accreditations demonstrate our commitment to safe working practices reliable engineering and professional standards across every project.

Why Choose SJB Mechanical & Building Services?
Decades of Experience
Accredited and Qualified Engineers
Complete Mechanical Service Range
Trusted by Leading Brands
Fast and Reliable Support
Rated by Clients Across the South East
Discover what clients say about our air conditioning heating plumbing and renewable services.
Leave us a review on Google and share your experience.
Your feedback helps us grow and continue providing quality service.




















