The Town of Mamaroneck Property Record Online System (“PROS”) is an interactive assessment website that allows property owners to search property information for any property in the Town of Mamaroneck. The Town of Mamaroneck PROS website allows property owners to review property assessment information, property inventory and search for comparable sales.

                                              Town of Mamaroneck Assessor’s Office                                                                   


Assessor's Office Information 


Pamela Valenza, Assessor

e-mail: townassessor@TownofMamaroneckNY.org


740 West Boston Post Rd

Second Floor, Room 207

Mamaroneck, NY 10543


 PH: (914) 381-7820 

FAX: (914) 381-2111


OFFICE HOURS: Monday - Friday 8:30AM - 4:30PM

 Summer Hours (Memorial to Labor Day Monday - Friday 8:30AM - 4:00PM)


News, Updates, and Information:


Please see the Forms page on left for Grievance Information


 Sale and Assessment Information:


Change Of Assessment Cover Letter 2024



Residential Sales with Photos

Residential Valid Sales

Condominium Valid Sales

Commercial Inventory and Valid Sales

Streets Within Neighborhoods

Neighborhoods Map