Collin County property values continued to rise in 2026, though growth slowed sharply from the prior year, according to certified estimated taxable values released by the Collin Central Appraisal District.
The district mailed 2026 real property appraisal notices April 15. Property owners who disagree with their valuations may file a protest by the deadline listed on their notice.
Countywide, estimated taxable values increased 1.28% to $272.8 billion, up from $269.36 billion in the 2025 certified roll. New property added $7.87 billion to the tax base. The average market value of a Collin County home was estimated at $592,948, down from $599,487 a year earlier.
The county’s 2025 report showed an 8.11% increase, indicating the 2026 market has cooled significantly compared with the prior year.
“Collin County is still growing at a rapid pace as evidenced by the increase in new construction in most areas,” said Brian Swanson, assistant chief appraiser. “However, the year-over-year existing home values have decreased slightly. This will still result in a slightly upward trend for the taxing entities when we certify the values.”
In Sachse, Collin County values declined 1.55%, from $1.80 billion to $1.77 billion. New construction accounted for $4.3 million, or 0.24% of total value. The average market value of a home in the Collin County portion of Sachse fell from $520,329 to $513,423.
Sachse residents who live in Dallas County pay property taxes to the city, Dallas County, Garland ISD, Dallas College and Parkland Hospital district. Residents who live in Collin County pay property taxes to the city, Collin County, Wylie ISD and Collin College.
In Wylie, taxable values were nearly flat, increasing 0.04% from $8.69 billion to $8.70 billion. New property added $71.3 million. The average market value of a home in Wylie dropped from $447,679 to $433,200.
Wylie Independent School District posted a 1.63% decline in taxable values, from $10.99 billion to $10.81 billion. New property added $180.7 million. The average market value of a home within WISD decreased from $483,634 to $473,527.
In Murphy, taxable values rose 2.18%, from $3.96 billion to $4.05 billion. New construction added $33.9 million. The average market value of a home increased from $609,774 to $620,390.
Elsewhere in eastern Collin County, Lavon posted one of the largest municipal gains at 15.3%, rising to $1.72 billion, while Princeton increased 3.83% to $5.07 billion and Farmersville rose 2.19% to $539 million.
Residents may file appraisal protests online through Collin Central Appraisal District at efileprotest.collincad.org, by mail or in person.
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