770 Massachusetts Ave Property Information Property Class US Government State Class Code 9003 Zoning (Unofficial) O-3 Map/Lot 119-94 Land Area (sq. ft) 40,167 Property Value Year of Assessment2017 Tax DistrictC5 Residential ExemptionNo Building Value$11,021,300 Land Value$3,585,000 Assessed Value$14,606,300 Sale Price$0 Book/Page/ Sale DateJanuary 1, 1900 Previous Assessed Value$13,733,800 Owner Information Owner(s)UNITED STATES OF AMERICA770 MASS AVEPOST OFFICECAMBRIDGE, MA 02139 Building Information Commercial Building Number 1, Section 1 Exterior StylePOST-OFFICE Occupancy US Government Number of Stories2 Exterior Wall Type BRICK Roof Material TAR-GRAVEL Wall Height 20 Partititions AVERAGE Interior Living Area (sq. ft.)43,544 Number of Units 1 Systems Heat TypePACKAGE-A/C Heat Fuel Gas Plumbing AVERAGE Condition & Grade Year Built1910 Overall ConditionExcellent Overall GradeExcellent Subareas Code Description Gross Area Living Area FUS Upper Story, Finished 21,772 21,772 BAS First Floor 21,772 21,772 CAN Canopy 1,650 0 UBM Basement 7,040 0 UST Utility, Storage, Unfinished 300 0 Total: 52,534 43,544 Extra Features / Outbuildings DescriptionELEV-FREIGHT Number of Units2.00 Unit TypeU Photos (Click on a photo to view in full size) Sketches Related Information GIS Map of this PropertyNo Sales with comparable location and/or physical attributes were found. Assessments are based on a market analysis of all valid sales for the subject's property class and the sales displayed are for comparison purposes only.Show PDF Map This page contains much of the information used by the City of Cambridge to assess properties. The purpose of this information is to be used only for ad valorem taxation purposes and any other use is therefore not valid.