• Tax Assessor Office Statutory Mandates
  • Identify, list on the tax roles, determine taxability and value of property.
  • Equalize property taxes and manage tax appeals.
• Annual Tax Assessments
  • The Tax Assessor notifies annnually by postcard all property owners informing them of their tax assessments.
• Rateables
  • 1,859 Total Borough of Mendham Rateables
    • 1,660 Total Residential Units Rateables 
      • 1,617 Class 2 (1-4 Units Residential)
        • Includes 19 2-Units Residential
      • 43 Class 3A (Farmland Assessment Residential)
    • 199 Total Non-Residential Rateables 
      • Includes Class 1 (Vacant Land), Class 3B (Farmland), Class 4 (Commercial)
• Addded Assessments
  • Assessed property values  are updated based on results of added assessment calculations or other adjustments. 
  • All open and completed building permits are tracked for added assessment purposes.
• Tax Assessment List
  • Tax List is available  for inspection by appointment.
    • To schedule an appointment:
      • email planning@mendhamnj.org
      • 973-543-7152 ext.20
  • New deeds are reviewed to maintain an accurate tax list of properties, ownership, assessments and other data that is statutorily required.
  • The Office reviews Joint Land Use Board actions, noting final approval of subdivisions for recording on the Tax List and Tax Map.
• Tax Map-Morris County GIS
  • On the green drop down menu select Mendham Borough.
• State and County Tax Appeals
  • Assessment Review Form
  • Tax Appeal Filing Guidlines
• Equalized Ratio
  • NJ State SR-1A list is based on deed information that is used to determine the Borough's equalization ratio. 
  • This ratio is used for distribution of State Aid to Schools.
• 200' Certified List of Property Owners Application 
  • The Tax Assessor's Office prepares the requried Certified List of Property Owners within 200 feet of a property for all JLUB Development Application.
• NJ Tax Relief Programs
  • NJ Tax Deductions, Exemptions, & Abatements Forms
    • Senior Freeze-Property Tax Reimbursement
      • ​​​How to Apply
        • NJ State Application Forms-First Time Applicant
          • All documentary proofs must be filed with the local Tax Collector.
        • NJ State D5 Form-Renewal  must be filed annually with the Tax Collector, on or before March 1, to maintain the deduction.
      • How to Appeal if Your Application Is Denied
        • If your application is denied, you can file an appeal with the County Board of Taxation.
        • NJ State A-1 Form-Appeal must be filed on or before April 1, following the denial.
• NJ State FA-1 Form-Farmland Assessment Application
  • Farmland Assessment Renewal Forms are sent to all qualifying farmland properties annually by the Tax Assessor.
  • Woodland Data Form for Farmland Aseessment 
  • Farmland Assessment Program
• 2024 Extended Tax Duplicate
• Commercial Property Annual Income/Expense Questionnaire