About Us

Johns Slater and Haward (JSH) has been a trusted name in building consultancy for over 120 years. Our longevity is a testament to the expertise, reliability, and strong client relationships we have cultivated across a wide range of sectors.

We specialise in the design of mechanical and electrical systems for buildings, combining extensive technical knowledge with a commitment to delivering efficient, sustainable solutions. Our team includes Chartered Engineers registered with the Engineering Council, CIBSE Registered Low Carbon Consultants, and EPC Assessors. We are trained by the Building Research Establishment (BRE) in Part L (SBEM) Compliance, proficient in thermal and daylighting modelling using TAS software, and skilled in Autodesk Revit for 3D design and Building Information Modelling (BIM).

As a company, we pride ourselves on being large enough to manage multi-million-pound projects, while remaining flexible and personal in our approach. Owned and operated by director/shareholders, we maintain a vested interest in client satisfaction and repeat business. Our established relationships with clients, architects, contractors, and consultants reflect our ability to work seamlessly in various roles throughout the construction process, from consultant to client advisor, architect, quantity surveyor, contractor, or expert witness.

At JSH, our heritage, technical excellence, and client-focused ethos drive everything we do. We continue to evolve with the industry, embracing innovation while staying true to the values that have sustained us for more than a century.