| Business | Phone |
| New Canaan Finance Dept 77 Main St, New Canaan 6840 | (203) 594-3022 |
| New Canaan Tax Collector 77 Main St, New Canaan 6840 | (203) 594-3066 |
| New Canaan Town Tax Collector 77 Main St, New Canaan 6840 | (203) 594-3064 |
| New Cannan Assessor 77 Main St, New Canaan 6840 | (203) 594-3005 |