Summit County Assessor's Office

The Summit County Assessor's Office is charged with discovering, listing, classifying, and valuing all taxable real and personal property. 

Real Property Valuation

In the state of Colorado, real property is reappraised by County Assessors every two years in the odd-numbered years. 2021 is a reappraisal year. Notices of Valuation for real property are mailed on May 1* and are available online through the Notice of Valuation Archive Search. Find more information about how real property is valued on the Real Property Valuation page.

Personal Property Valuation

Business equipment and/or residential rental furnishings, per Colorado statute, are taxable personal property for anyone who owns a business or rents out their furnished residential property on a short term or long term basis. Personal property is reappraised annually. Notices of Valuation for personal property are mailed on June 15* and are available online through the Notice of Valuation Archive Search. Find more information about filing a declaration on the Personal Property Valuation page.


Property owners may appeal their value and/or classification each year within the statutory appeal dates. The Assessor's Office reviews the appeals and sends a Notice of Determination, which outlines the decision and further appeal rights. Find more information about deadlines and submittal on the Appeals page.

In-Person Appointments

The Assessor's Office is currently open by appointment only. Schedule a 15 minute appointment and provide a description of your inquiry or request under "special instructions" when booking the appointment. Please note, Summit County's Public Health order requires that individuals wear a mask or non-medical cloth face covering over both the mouth and nose at all times when entering and conducting business in County buildings and office.

For inquiries about the valuation of a Commercial Improved property, please make an appointment with our Commercial Appraiser using the following link:

* When a deadline falls on the weekend or holiday, the taxpayer, as well as the government, has until the following business day to timely file.