About Onyx Plumbing & Heating

Onyx Plumbing & Heating was founded by lead heating engineer Daniel Hartley in 2014, after nearly a decade as a senior technical diagnostic specialist for major national energy firms. Frustrated by how those firms treated local homeowners — high rates, inconsistent scheduling and zero personal accountability — he launched Onyx from a single van in Headingley with a clear philosophy: combine the technical standards and safety protocols of a national firm with the care, punctuality and honest pricing of a trusted local business.

Today Onyx is a tightly knit team of local Gas Safe engineers, tilers and system designers. We never employ pushy, commission-based salespeople or cut corners with cheap materials. We live and work in the communities we serve, so we approach every boiler installation, leaking pipe and bathroom project as if we were working in our own family home — on time, respectful of your floors, charging exactly what we quote and standing behind every seal we crimp.