Name the District, Maryland and Virginia before a visitor has to guess
Coverage is the first question in this metro and it should be answered above the fold, in words, not on a map graphic.
A map image is not an answer. It loads late, it is unreadable on a phone, and it usually implies more coverage than the company actually holds.
Put a plain line near the top: the jurisdictions and the main areas you serve. If your coverage differs by service, say that too. A shop that does emergency work in the District but only scheduled work in Fairfax County should write exactly that.
The gain is not aesthetic. Every visitor you disqualify in three seconds is a call your office does not have to decline, and every visitor you qualify is one who now trusts the rest of the page more.
Repeat the same line in the header of interior pages. People land on service pages from search far more often than on the homepage.