Coos County, NH property tax deadlines
4 coming property tax dates for Coos County, New Hampshire. Each one links to its official source and shows the day LevyDay last checked it.
| Next dates | Bills due | Last day without penalty | Appeal by | Exemption filing |
|---|---|---|---|---|
| Coos | No date on file | Dec 1, 2026gc.nh.govMar 6 | Mar 1, 2027btla.nh.govOct 24 | Apr 15, 2027btla.nh.govOct 24 |
Deadlines in date order
| Date and source | Deadline |
|---|---|
| March 1 every yearbtla.nh.govOct 24 | Appeal deadline Ask your town for an abatement March 1 if your final tax bill is dated December 31 or earlier. If it's dated later, you get 2 months from the bill date. |
| April 15 every yearbtla.nh.govOct 24 | Exemption filing Apply for exemptions and tax credits File Form A-9 with your town. |
| September 1 every yearbtla.nh.govOct 24 | Appeal deadline Appeal to the state tax board September 1 if your final tax bill is dated December 31 or earlier (but never before your town's decision or July 1). Otherwise, 8 months after the bill date. |
| December 1 every yeargc.nh.govMar 6 | Last day without penalty Final bill: last day without interest Or 30 days after the bill was mailed, when it went out late. 8% a year interest after that. |
Appealing your assessed value
Appeal by Mar 1, 2027 in 128 daysbtla.nh.govOct 24
If you think the county valued your home too high, you can appeal. Filing with the county is free and you can do it yourself.
Get help filing an appeal
After you send your details, we look for an independent appeal firm or attorney to take your case. We'll be in touch once one has agreed. Firms usually charge a share of what you save, and the one that takes it may pay LevyDay a referral fee.
LevyDay doesn't file appeals or give legal or tax advice. We only pass your details on. The independent firm or attorney that takes your case does the work and sets its own fee.
Get help filing an appealPlaces in Coos County
They are: Berlin, Colebrook, Gorham, Groveton, Lancaster, West Stewartstown, Whitefield. Every place in the county gets the dates above.
Nearby in the New Hampshire list
BelknapCarrollCheshireGraftonHillsboroughMerrimackRockinghamStraffordSullivan