How a plumber turns one-off jobs into commercial maintenance contracts

TL;DR: Most UK plumbers run a domestic-led business: residential leaks, boiler swaps, bathroom refurbs. The work is reliable but transactional. A customer calls when something breaks; you fix it; six months pass before they call again. Commercial plumbing operates on a different rhythm. Property managers, facilities teams, lettings agents, and small-portfolio commercial landlords run ongoing relationships with one or two contractors who handle their planned and reactive work. A single property-management contract is worth £8,000–£24,000 of recurring revenue across a year. Three contracts changes what your business is. Building this revenue line takes deliberate sales motion, but the work itself is the work you already do.

If you're a self-employed UK plumber, your domestic phone rings predictably enough but the income from it is lumpy. Some months are bathroom-refurb months at £4,000 a job. Some months are five emergency callouts at £180 each. Commercial work changes that profile: predictable, scheduled, repeat. The catch is that commercial buyers don't find you the way homeowners do. You have to actively go after them.