| Business | Phone |
| Chatham Borough Tax Assessor 54 Fairmount Ave, Chatham 7928 | (973) 635-1779 |
| Chatham Tax Collector 54 Fairmount Ave, Chatham 7928 | (973) 635-1778 |
| Chatham Twp Tax Assessor 58 Meyersville Rd, Chatham 7928 | (973) 635-3207 |
| Chatham Twp Tax Collector 58 Meyersville Rd, Chatham 7928 | (973) 635-3206 |