1. Start with the Prospect Heights service area, not a guessed call forecast
Prospect Heights is recorded as a municipality in Cook County, Illinois. The 2020–2024 ACS five-year estimate lists 15,618 residents, with a margin of error of 32. That is geographic context only. It does not establish legal demand, call volume, competition, language needs, lead volume or revenue. For your firm, the relevant operating question is which callers you intend to serve in Prospect Heights and elsewhere in Cook County, and how your phone system should distinguish those callers from existing clients and unrelated inquiries.
Recommended approach
Bring your actual service-area description and practice-area boundaries to the review. Decide whether the answering path should accept every caller, screen by matter type, route existing clients differently, or collect information for later review. Do not set staffing or capacity assumptions from the population figure alone.
