Step-by-step guide to challenging your NYC property tax assessment with the Tax Commission.
Last updated: March 2026 · 9.4M+ properties indexed
DOF sends the Notice of Property Value (NOPV) in January. Check the assessed value and compare to market.
Comparable sales, income data, and building condition evidence. RegWatch provides assessment data and comparables.
File an application with the NYC Tax Commission by March 1 (Class 1) or March 15 (Class 2/3/4).
Present your case. If unsuccessful, you can file an Article 7 proceeding in court.
RegWatch's tax appeal generator identifies properties that may be over-assessed based on comparable data, assessment ratios, and market conditions.
You can search some NYC agency databases for free individually (ACRIS, DOB BIS, HPD Online, DOF). RegWatch offers a free account with unlimited property data that searches all 270+ sources at once. Our coverage extends beyond NYC to Nassau, Suffolk, Westchester, and New Jersey counties.
Manually: 30 minutes to several hours per property depending on depth. With RegWatch: under 3 seconds for a complete profile from 270+ sources.
No special tools required. RegWatch works in any modern web browser. For manual research, you just need internet access to city agency websites.
RegWatch data from official NYC sources is updated multiple times per day. Most records are within 24 hours of the agency databases.
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