San Juan County, WA property tax deadlines
6 coming property tax dates for San Juan County, Washington. 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 |
|---|---|---|---|---|
| San Juan | Oct 31, 2026 SatThe last day without penaltyapp.leg.wa.govOct 24 | Oct 31, 2026 Satapp.leg.wa.govOct 24 | Jul 1, 2027app.leg.wa.govOct 24 | Dec 31, 2026app.leg.wa.govOct 24 |
Deadlines in date order
| Date and source | Deadline |
|---|---|
| April 30 every yearapp.leg.wa.govOct 24 | Last day without penalty First half due (or all of it, if under $50) It's late after April 30. If the year's tax is under $50, pay it all by April 30. |
| July 1 every yearapp.leg.wa.govOct 24 | Appeal deadline Appeal your value to the county board July 1 of the assessment year or 30 days after your value notice was mailed, whichever is later. A county can set a limit of up to 60 days instead of 30. |
| July 1 every yearsanjuancountywa.govOct 24 | Appeal deadline Appeal your value July 1 of this assessment year or 30 days from the date on your value notice, whichever is later. |
| October 31 every yearapp.leg.wa.govOct 24 | Last day without penalty Second half due It's late after October 31. |
| December 31 every yearapp.leg.wa.govOct 24 | Exemption filing Renew your senior or disabled exemption Only in a year the assessor tells you to renew, which is at least every six years. A first claim can be filed any time in the year, for taxes due the next year. |
| Varies, see rule set by noticeapp.leg.wa.govOct 24 | Bills due Bills due by the last day without penalty Pay the first half by April 30 and the second half by October 31. Each is late the day after. |
Appealing your assessed value
Appeal by Jul 1, 2027 in 250 daysapp.leg.wa.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 appealGood to know in Washington
- Paying late: Delinquent tax on residential property with four or fewer units, including manufactured homes, carries interest of nine percent a year. Other property is charged twelve percent. More app.leg.wa.govOct 24
- Appealing your value: You appeal your assessed value by filing a petition with the county board of equalization, on a form prescribed or approved by the Department of Revenue. More app.leg.wa.govOct 24
- Homestead exemption: If you meet criteria such as age and income, you may be eligible for the exemption for senior citizens and people with disabilities. Apply through your county assessor. More dor.wa.govOct 24
Official offices
Places in San Juan County
They are: Friday Harbor, Roche Harbor. Every place in the county gets the dates above.
Nearby in the Washington list
LincolnMasonOkanoganPacificPend OreillePierceSkagitSkamaniaSnohomishSpokaneStevensThurston