About 10% of my regular work income is from tax appeals. Find out what the appeal process is and try it. I have never seen someone's taxes go up due to trying a tax appeal, but I have seen countless times where it goes down...
I assume that you are in Bernalillo County, NM, here is the appeal process:
Protesting Assessment Values
Q. What is the appeal/protest process if I disagree with the county Assessor's valuation on my property?
A. To start the appeal/protest process in Bernalillo County, you should:
1) Completely fill out the Protest Form that is available at the County Assessor's Office or on the Assessor's Web page at www.bernco.gov/assessor-office
2) The completed form must be returned to the Assessor's Office within 30-days of the initial mailing date of the Notice of Value. See the Assessor's Office Web page: www.bernco.gov
3) An informal meeting will be made with a field appraiser.
4) A formal hearing with the Protest Valuation Review Board will be scheduled if the valuation is not resolved at the informal meeting.
5) If it is not resolved satisfactorily at the Board Hearing before the Protest Valuation Review Board, you may make an official appeal to District Court.
Q. May I review my records at the Assessor's Office for my appeal/protest?
A. Yes. Property records are confidential information. You may only review your own file.
Q. Is there any other remedy of appealing/protesting my value?
A. Pursuant to 7-38-39 NMSA 1978 Protesting Values-Claim for refund, after receiving your property tax bill and after making payment prior to the delinquency date of all property taxes you may file a claim for refund in District Court.