A wide service area feels like growth right up until you price the windshield time. Two hours of driving to quote a small repair costs a crew more than the job is worth, and the cost is invisible because nobody invoices for it.
Start by mapping where your profitable jobs came from last year. Not all jobs — profitable ones. Most contractors find a tight cluster they under-serve and a wide fringe they over-serve.
Weigh each zip code by three things: typical job value, drive time from your yard, and how many crews you can actually staff there. A high-value zip an hour away can be worth it for replacements and completely wrong for service calls.
Expand deliberately. Add adjacent zips once your close rate proves the core footprint is working, and add them one layer at a time so you can tell whether the new area is carrying its own cost.
Finally, match your lead volume to crew capacity in each area, not overall. A schedule that looks balanced on paper can still leave one crew driving across the metro every morning while another sits idle.