Name the suburbs you dispatch to before you name your years in business
A visitor's first unspoken question is whether you come to their street, and most plumbing sites answer it three scrolls too late.
The header should carry the phone number, the trade and the area in words a person recognizes. Richardson, Garland, Carrollton, Addison. Not a vague claim about serving the greater Metroplex.
Loose coverage claims cost you twice. Locals read them as a franchise front, and people well outside your range call anyway and tie up the phone.
A short, real list also disciplines the rest of the site. If the header says four counties and the service pages say two, visitors notice the mismatch even if they cannot name it.
On mobile, keep a tap-to-call button in the thumb zone and leave it there as the page scrolls. Someone standing near water is not hunting through a menu.