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Appeals Calendar

Appeals Calendar

When submitting your real property appeal to the Boulder County Assessor’s Office, please keep in mind the following timelines, dates and processes.

Please note that the dates below reflect statutory deadlines. If a deadline falls on a Saturday, Sunday or a legal holiday, it is legally extended to the following business day. For example, if the June 1 deadline occurs on a weekend, then the deadline would be the following Monday. 39-1-120(3), C.R.S.

2020 Amended Assessor Deadlines

June 15 Business Personal Property declaration deadline, penalties for late filing, extensions available upon request
August 3 Business Personal Property Notice of Valuations mailed
August 3 Business Personal Property Assessor level appeals start
August 20 Business Personal Property Assessor level appeals end
September 1 CBOE hearings begin
September 10 Senior & Veterans Exemption report to DPT
September 16 Notices of Determinations mailed for Real Property and Business Personal Property
September 28 Deadline to file CBOE appeal for Real Property and Business Personal Property
October 13 Preliminary Certification and Abstract
October 15 Assessor reports total assessed value to CBOE
November 16 CBOE hearings end for Real Property and Business Personal Property
December 1 Abstract due
December 10 Final Certification due
December 15 Mill levies delivered by Authorities
December 22 BOCC approves Mill Levies

Statutory Assessor Deadlines

Real Property
Not later than May 1 Assessor mails real property Notices of Valuation.
May 1 through June 1 Assessor hears appeals to real property valuation.

Mailed appeals must be postmarked on or before June 1.

Appeals delivered in person will be accepted through 4:30 PM on June 1.

Online and faxed appeals must be time-stamped no later than 11:59 pm on June 1 to be ON TIME.

Please be sure to allow enough time in the event that others are also submitting their appeals at the last minute.

After June 1 Online and faxed appeals time-stamped after 11:59 pm June 1, mailed appeals postmarked, or appeals submitted after June 1 are LATE. Your property value will be reviewed, but by filing after June 1 you have forfeited the right to further appeal.
On or before August 15 Assessor mails Notice of Determination on real property appeals.
On or before September 15 Taxpayer files a written real property valuation appeal to the Board of Equalization (BOE).
Business Personal Property
Not later than June 15 Assessor mails personal property Notices of Valuation.
June 15 through June 30 Taxpayer submits appeals to personal property valuation.

Mailed appeals must be postmarked on or before June 30.

Appeals delivered in person will be accepted through 5:00 PM, June 30.

Online and faxed appeals will not be accepted if time-stamped after 11:59 pm, June 30.

Please be sure to allow enough time in the event that others are also submitting their appeals at the last minute.

June 15 through June 30 Assessor hears appeals to personal property valuation.
After June 30 Online and faxed appeals time-stamped after 11:59 pm June 30, mailed appeals postmarked, or appeals submitted after June 30 are LATE. Your property value will be reviewed, but by filing after June 30 you have forfeited the right to further appeal.
Not later than August 15 Assessor mails Notice of Determination for personal property appeals.
Not later than September 15 Taxpayer files a written personal property appeal to the Board of Equalization, (BOE).
Board of Equalization (BOE)
Not later than November 1 BOE concludes hearings on property valuation appeals.
Within 5 days of rendering BOE decision BOE mails decisions on real and personal property appeals.
Not later than 30 days after BOE decision Appeals from BOE decisions must be filed with the Board of Assessment Appeals, district court, or the Board of County Commissioners for binding arbitration.

Please note that if a deadline falls on a Saturday, Sunday or a legal holiday, it is legally extended to the following business day. For example, if the June 1 deadline occurs on a weekend, then the deadline would be the following Monday. 39-1-120(3), C.R.S.

Contact Us

Due to COVID-19, all Assessors Office sites are closed for business until further notice. Please call or email us with your questions during our normal business hours.

Assessor
Phone: 303-441-3530
Fax: 303-441-4996

Business Personal Property
Phone: 303-441-3316
Fax: 303-441-1783

Email

Schedule a meeting

Mailing Address
Main: PO Box 471
Boulder, CO 80306-0471

Locations
Boulder
1325 Pearl St., 2nd floor
Boulder, CO 80302
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Hours: 8 a.m.-4:30 p.m. M-F

Longmont
515 Coffman Street, Suite 114
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Lafayette
1376 Miners Dr., Unit 105
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