Do we need a page for every city?
For the cities you actively want work in, yes — with real content about that area. Thin city pages that only swap a name don't rank and don't convert.
Plumbers Websites
Half your website traffic has water somewhere it shouldn't be. Design for that first.

Emergency plumbing visitors don't read. They tap. If your phone number isn't the most obvious thing on a phone screen, you lose the call to the next result.
The other half of your traffic is planning — a water heater, a bathroom remodel, a repipe — and those people do read. We build sites that handle both without compromising either.
Getting Found
Plumbing is the textbook service-plus-city category. "Water heater replacement [city]" and "emergency plumber [city]" are separate searches with separate pages behind them.
Most plumbing sites fail here for one reason: everything lives on a single Services page. Splitting it out is usually the biggest available win.
Questions
For the cities you actively want work in, yes — with real content about that area. Thin city pages that only swap a name don't rank and don't convert.
Only if you truly offer it. Advertising after-hours availability you can't staff generates angry calls and bad reviews.
Answer eight questions and we'll show you the structure, features and search strategy we'd recommend.