Thornton Assessment Records

Thornton property tax records are maintained by both Adams and Weld County Assessors for this northern Denver suburb of 141,867 residents. As one of Colorado's fastest-growing cities, Thornton straddles the county line between these two counties. Property owners must contact the correct assessor based on their parcel's location within the city limits.

Thornton Property Records by County

Thornton spans Adams and Weld Counties north of Denver. Most of the city sits in Adams County. The eastern portions extend into Weld County. You need to know which county contains your property. Each assessor keeps separate records for Thornton parcels.

For Adams County portions of Thornton, contact the assessor at 720-523-6038. The Adams County Assessor website offers online search tools. You can find assessments and tax status for Thornton properties here.

For Weld County portions, call 970-400-3650. The Weld County Assessor website maintains records for Thornton parcels in this county. Be sure to use the correct system for your address.

The Adams County Assessor maintains most Thornton property tax records since the majority of the city lies within this county.

Note: Check your property tax bill to determine which county assessor handles your Thornton property.

Search Thornton Property Tax Records

Finding property tax records in Thornton requires knowing your county. Adams and Weld Counties use different search systems. You cannot search all Thornton properties in one database. You must use the correct county portal.

Adams County offers property search for Thornton homes in this county. You can search by address or parcel number. The system displays current assessments and ownership. Results include tax status and payment history.

Weld County provides online access through their property search system. Thornton properties in Weld County appear in these results. You can view assessment values and property details.

The Adams County Exemptions page provides information on tax relief programs for Thornton residents.

To search Thornton property tax records, gather this information:

• Property address or parcel number
• Knowledge of which county contains your property
• Owner name if searching by person

Thornton Property Tax Payments

Property taxes for Thornton are collected by Adams and Weld County treasurers. Each county handles its portion of the city. Tax bills arrive after January 1. They cover the prior year's taxes. Deadlines are consistent across both counties.

Adams County residents can pay online through the treasurer's website. The system accepts credit cards and e-checks. Convenience fees may apply. Mail payments should include your parcel number.

Weld County residents use their treasurer's payment system at www.weldtax.com. Be sure to pay the correct county for your Thornton property.

First half payments are due by the end of February. Second half payments are due June 15. Late payments add interest and penalties under Colorado law. Keep all receipts for your records.

Note: Tax bills are mailed to the address on file with the assessor's office.

Thornton Property Tax Exemptions

Thornton residents may qualify for property tax exemptions. The Senior Citizen Exemption helps those 65 and older. You must have owned and occupied your home for 10 years. The exemption covers 50% of the first $200,000 in value. Applications are due July 15.

Veterans with 100% permanent disability also qualify. They must have served on active duty. The disability must be service-connected. They must own and live in the property. The exemption covers 50% of the first $200,000. The deadline is July 1.

Apply through the county assessor where your property is located. Adams County handles most Thornton applications. Weld County handles their portion. Both follow the same state exemption rules.

Appeal Thornton Property Assessments

You can protest your Thornton property assessment. File with the county assessor for your property's location. The deadline is June 1 for real property. Both counties follow state appeal procedures.

If you disagree with the assessor, appeal to that county's Board of Equalization. The deadline is July 20. The board holds hearings through the summer. They issue written decisions by set dates.

After the board decision, you can appeal to the Board of Assessment Appeals, file in district court, or choose binding arbitration. You have 30 days from the board decision.

Thornton City Government

The City of Thornton provides local services across both counties. They manage zoning and building permits. They do not set property tax values. The county assessors handle that function. The city website has local regulations.

Visit the Thornton city website for zoning information and permits. Property tax records remain with Adams or Weld County. Contact the appropriate county assessor based on your location.

County Property Tax Records for Thornton

Thornton spans parts of Adams and Weld Counties. Each county maintains separate property tax records for their portion of the city. Visit the appropriate county page: