Cook County · Northfield Township
Accounting & Tax Services in Northbrook, IL
Accounting, controller and tax work for Northbrook businesses, from a practice in Wilmette.
Northbrook borders Deerfield, and the county line runs between them — a short drive changes which assessment system a property falls under.
Registering a business in Northbrook
Every village on the North Shore sets its own rule, and they diverge more than most owners expect.
Northbrook does not licence everyone. A general business licence is required only of specific categories of business, which makes the first question in Northbrook "does this apply to me at all?" rather than "how much?". Licences and registrations run on a year beginning May 1 and ending April 30.
Northbrook's own guidance → · Requirements and fees change; confirm with the village before you rely on this.
Property assessment in Northbrook
Worth knowing before you assume the rules are the same everywhere in the north suburbs. They are not.
Northbrook is assessed by the Cook County Assessor, and it sits in the north suburban township group — reassessed in 2016, 2019, 2022 and 2025, which puts the next one in 2028. In a reassessment year there are two chances to contest a value; in an off year, generally one. How the Cook County appeal cycle works →
Do I need a business licence to operate in Northbrook?
Northbrook does not licence everyone. A general business licence is required only of specific categories of business, which makes the first question in Northbrook "does this apply to me at all?" rather than "how much?". Licences and registrations run on a year beginning May 1 and ending April 30.
Which county and township handle assessment for a Northbrook business?
Northbrook is in Cook County, Northfield Township. That decides who values your property, which appeal window applies, and who you call first — and it is not the same answer a few miles away.
Also serving
Neighbouring communities we work in regularly — each with its own registration rule.