Property Assessment Notices and Trends 2026

Mark your Calendar!

May 1st
- The 2026 property assessment notices mailed
May 2nd
- Live on Assessors' webpage after 5 p.m.
May 4th to 8th
- During the “Open Book Period" you can view the information used in calculating your assessed value.
- If you find errors in such things as the number of rooms or the completion date for a building permit, you can ask to correct an assessment record and the resulting assessment by contacting the assessor's office at:
  - Email: openbook@cityofmadison.com
  - Call: 608-266-4531
- During this period the staff can also explain the methods and information used to assess your property.
May 11th to 15th
- If your property details are correct but you disagree with the assessed value of your property, you will need to file an objection with the Board of Assessors by 4:30 pm on May 15.
  - Email: openbook@cityofmadison.com
  - Call: 608-266-4531
May 18th
- The first Board of Review for processing assessed value objections will be on May 18th. Please find additional information about that process here: https://www.cityofmadison.com/assessor/annual-process/open-book-appeals

Overall, Madison's assessed value growth was 6.1%.
Madison's total tax base value is $51,800,472,900.
The average value of a residential single-family home increased to $500,300 which is a 3.9% increase from 2025.
This is the lowest increase since pre-pandemic. In one sense this is steady growth at a sustainable velocity. From another perspective, a steady decrease in the total number of sales (roughly half of what occurred in 2020) illustrates the impact of interest rates and lack of supply in our housing stock.
Those properties that do sell, while still above assessed value, are not at the same robust percentage increase that we have seen in prior years.
Madison's new construction number, while still nearing $1 billion, is relatively flat from last year, which also tracks with the impact of turbulence in the overall market.

Image credit: Madison Assessors Office

Budget