Sierra County, New MexicoProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- November 1, 2026 or earlier, under the New Mexico county-treasurer annual schedule; Sierra County's official source reviewed did not publish a separate 2026 mailing day.
- Payment deadline
- For tax year 2026, New Mexico county treasurers mail property-tax bills on or before November 1, 2026; the first-half payment is due November 10, 2026 and avoids interest and penalty if paid by December 10, 2026; the second-half payment is due April 10, 2027 and avoids additional charges if paid by May 10, 2027.
- Assessment appeal
- Within 30 days after the official 2026 Notice of Value mailing; Sierra County typically mails Notices of Value around March 31 and schedules informal and formal valuation-review hearings.
Exemptions & appeals
View exemption application (opens in a new tab)Exemption filing
Within 30 days after the official 2026 Notice of Value mailing; Sierra County's assessor page identifies this deadline for head-of-family, veteran, disabled-veteran, and valuation-freeze applications.
Senior relief
Sierra County provides a 65-Plus Low Income Limitation application; qualifying owners age 65 or older or permanently disabled may apply for a residential valuation freeze, subject to the current New Mexico income limit and proof requirements.
Valuation limits
Sierra County applies the New Mexico residential limitation generally capping annual valuation increases at 3% for eligible property; statutory exceptions include sale/change of ownership, first placement on the roll, new improvements, and use or zoning changes. Qualifying low-income seniors or disabled owners may receive a freeze.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →