Jurisdiction is the first question, not a field near the bottom of the form
Whether the address sits in the District, suburban Maryland or Northern Virginia determines everything that happens next, so ask it first.
The three jurisdictions license, permit and tax separately. Requirements differ and are worth confirming with the relevant building department, but the intake consequence is immediate: an inquiry from an address you cannot serve is not a lead, it is a cost.
Put the address or ZIP field at the top of every form and make it the first thing the person answering the phone asks. It sets the arrival window, the permitting path and whether the job is yours at all.
Doing this well also improves the experience for people you decline. A quick honest answer with a referral is remembered better than a slow one that goes nowhere, and in a market this connected that matters.
Track declined inquiries by jurisdiction. If a meaningful share of inquiries come from one place you never serve, the problem is upstream in the targeting, not in intake.