Most 2027 property tax appeal deadlines fall between March and September, and several are short windows tied to the date on your notice — so the safest plan is to know your state’s rule before the notice arrives. Miss the window and you’re usually stuck with that year’s value. Here’s the 2027 calendar for the states we cover.
The 2027 calendar at a glance
| State | When notices arrive | Filing window / deadline | Where you file |
|---|---|---|---|
| California | Value notices by August 1 in most counties | July 2 – September 15, 2027, or July 2 – November 30, 2027 in counties that don’t mail notices by August 1 | County assessment appeals board (clerk of the board) |
| Texas | April (homesteads from about April 1) | Monday, May 17, 2027 (May 15 is a Saturday), or 30 days after your notice, if later | Appraisal district’s Appraisal Review Board |
| Florida | TRIM notice, usually mid-August | 25 days after the TRIM notice is mailed | County Value Adjustment Board clerk |
| Washington | Value change notice from the assessor | July 1, 2027, or 30 days after your notice is mailed (up to 60 if your county allows), whichever is later | County Board of Equalization |
| Georgia | Annual assessment notice; timing varies by county | 45 days from the date your notice was mailed | County Board of Tax Assessors |
| New York — Nassau | Tentative roll January 4, 2027 | January 4 – March 1, 2027 | Assessment Review Commission |
| New York — Suffolk towns | Tentative roll around May 1 | Grievance Day, Tuesday, May 18, 2027 (third Tuesday in May) | Town Board of Assessment Review |
| New York — most other towns | Tentative roll May 1 in most communities | Grievance Day, Tuesday, May 25, 2027 (fourth Tuesday in May) | Town or city Board of Assessment Review |
| Colorado | Notice of Valuation by May 1 (a Saturday in 2027) | May 1 – Tuesday, June 8, 2027 | County assessor |
| Ohio | Window opens January 1, 2027 | March 31, 2027, or the first-half tax due date if later | County board of revision, through the county auditor |
California
You appeal to your county’s assessment appeals board using Form BOE-305-AH. The regular window opens July 2. It closes September 15, 2027 in counties where the assessor mails value notices by August 1, and November 30, 2027 in counties that don’t. Each county certifies its date to the state, so check with your clerk of the board. Read our California guide.
Texas
The deadline is May 15 or 30 days after your appraisal notice is delivered, whichever is later. In 2027, May 15 falls on a Saturday, so the deadline moves to Monday, May 17, 2027. See every 2027 Texas date.
Florida
Florida has no fixed calendar date. You have 25 days after the property appraiser mails your TRIM notice (Notice of Proposed Property Taxes), which usually goes out in mid-August. You file a petition with the Value Adjustment Board clerk, and the board can charge up to $50. Read our Florida guide.
Washington
Your petition to the county Board of Equalization is due July 1, 2027, or 30 days after the assessor mails your value notice, whichever is later. Counties can set a longer limit of up to 60 days, so check your notice. Read our Washington guide.
Georgia
You have 45 days from the date your assessment notice was mailed — not the date you received it. File with your County Board of Tax Assessors, not the Department of Revenue. Notice dates vary: Fulton County mailed 2026 notices in June, with a July 31 deadline for most owners. Read our Georgia guide.
New York
New York’s dates depend on where you live:
- Nassau County: file with the Assessment Review Commission between January 4 and March 1, 2027. You can file online through AROW.
- Suffolk County towns: Boards of Assessment Review meet on the third Tuesday in May — May 18, 2027.
- Most other towns: Grievance Day is the fourth Tuesday in May — May 25, 2027. Cities and villages can use different dates, so confirm with your assessor or clerk.
Outside Nassau and New York City, you file Form RP-524. Read our New York guide.
Colorado
2027 is a reappraisal year, so the value you get will normally carry into 2028. Protest to your county assessor between May 1 and June 8, 2027. If the assessor says no, the next deadline is July 15 or September 15, depending on your county’s schedule. Read our Colorado guide.
Ohio
Ohio works backward: a complaint filed in 2027 challenges your 2026 value. Your complaint (Form DTE 1) must reach the county auditor by March 31, 2027 — or by the last day to pay first-half taxes without penalty, if that’s later. The county board of revision hears it. Read our Ohio guide.
Weekend dates to watch
- Texas: May 15, 2027 is a Saturday, so the deadline is Monday, May 17.
- Colorado: Notices of Valuation are due by May 1, which is a Saturday in 2027. In counties on Colorado’s later schedule, the assessor’s August 15 decision date is a Sunday.
- California: September 15 (Wednesday) and November 30 (Tuesday) both fall on weekdays in 2027. When a California deadline does land on a weekend or holiday, it moves to the next business day.
Or let someone do it for you
Every one of these appeals is free to file yourself. If you’d rather not track the dates, Recoup Capital files appeals for 30% of first-year savings (25% in Texas), and you pay nothing if your taxes don’t go down. Sign up early so we’re ready the day your window opens.
Sources: California BOE — Section 1603 filing period, California BOE — Letter to Assessors 2026/016, San Luis Obispo County — Form BOE-305-AH, Texas Tax Code §41.44, Texas Comptroller — protests, Florida Department of Revenue — PT-101, RCW 84.40.038, Georgia Department of Revenue — Filing a property tax appeal, Fulton County — 2026 assessments, NY Department of Taxation and Finance — Grievance procedures, Nassau County Assessment Review Commission, Colorado Division of Property Taxation, C.R.S. 39-5-122, Ohio Form DTE 1.