Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. Every office link was opened and checked against the office's own site between September 23, 2026 and September 25, 2026.
Thornton, Colorado, in Adams County, has about 147,000 residents (2024 Census Bureau estimate). The title to a parcel in Thornton is in the deed records of the Clerk and Recorder and its taxable value is set by the County Assessor; what is built on it is a matter for the city. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, city permits and records, evictions and court cases, records requests, directory links and common questions.
Related guides: Thornton public records, Adams County property records, Thornton arrest records, Thornton warrants, Thornton inmate search, Thornton criminal records, Colorado arrest records and Colorado inmate search.
Deeds, Mortgages and Liens in Thornton
Who owns a parcel in Thornton and what it sold for are in the deed records of the Clerk and Recorder, with every lien or mortgage against the land.
SearchSystems opened and checked the Clerk and Recorder's page at adamscountyco.gov/our-county/elected-officials/clerk-recorder (page title: Clerk & Recorder | Adams County, CO), phone 303.659.1161, 4430 S Adams County Pkwy Brighton, CO 80601, which answered when SearchSystems opened it on September 23, 2026.
Assessed Values and the Tax Roll in Thornton
The County Assessor sets the value each parcel in Thornton is taxed on and keeps the parcel maps. Colorado reassesses every property in odd-numbered years, so the value on a tax notice is set for two years at a time.
SearchSystems opened and checked the County Assessor's page at adamscountyco.gov/service/search-real-property (page title: Search Real Property | Adams County, CO), which answered when SearchSystems opened it on September 23, 2026.
Permits and City Records in Thornton
Building permits, zoning and code cases are the city's own. For Thornton, SearchSystems opened and checked the city hall page at thorntonco.gov/contact-us/citys-main-phone-line (page title: City's Main Phone Line | City of Thornton), phone 303-538-7200, 7200 Address 9500 Civic Center Drive Thornton, CO 80229, Monday-Friday: 8 a.m.-5 p.m., which answered when SearchSystems opened it on September 25, 2026.
The city clerk's page SearchSystems verified is at thorntonco.gov/government/city-clerk (page title: City Clerk | City of Thornton), phone 303-538-7230, 9500 Civic Center Drive, Thornton CO 80229, which answered when SearchSystems opened it on September 25, 2026.
Evictions and Court Cases About Land in Thornton
Court cases about land from Thornton, evictions among them, are filed in the County Court or the Adams County District Court.
The court records page SearchSystems verified for the county is at coloradojudicial.gov/courts/trial-courts/adams-county, phone 303-659-1161.
Asking a County Office for a Record
Under the Colorado Open Records Act a county office must answer a request within 3 working days, extendable to 7 when there are extenuating circumstances, and it may charge research and retrieval time after the first hour, plus copying.
More Official Property and Land Records Pages for Adams County
The SearchSystems directory, online since 1997, lists the official pages for Adams County and Colorado. These property pages and recorded document pages from its Adams County listing were opened again on October 2, 2026 and each one still answers:
- GIS Interactive Maps (adamscountyco.gov)
- Landmark Web Official Records Search (recording.adcogov.org)
Frequently Asked Questions
Who records deeds in Thornton?
The Clerk and Recorder, at adamscountyco.gov, phone 303.659.1161. Deeds, mortgages and liens on land in Thornton are filed there, and the County Assessor (adamscountyco.gov) has the assessment records.
Who sets the assessed value of a property in Thornton?
The County Assessor, whose page SearchSystems verified is at adamscountyco.gov.
Where are evictions from Thornton filed?
In the County Court. The file is public unless the court seals it.
How is property assessed in Colorado?
Colorado reassesses every property in odd-numbered years, so the value on a tax notice is set for two years at a time.
Is this the official Thornton website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.