815 Massachusetts Ave Property Information Property Class Improved City State Class Code 931 Zoning (Unofficial) O-3 Map/Lot 118-33 Land Area (sq. ft) 47,877 Property Value Year of Assessment2017 Tax DistrictC5 Residential ExemptionNo Building Value$22,109,500 Land Value$3,368,200 Assessed Value$25,477,700 Sale Price$0 Book/Page/ Sale DateJanuary 1, 1900 Previous Assessed Value$25,759,000 Owner Information Owner(s)CAMBRIDGE CITY OFCITY HALL795 MASSACHUSETTS AVECAMBRIDGE, MA 02139 Building Information Commercial Building Number 1, Section 1 Exterior StyleHISTORIC INSTITUTNL Occupancy Improved City Number of Stories4 Exterior Wall Type OTHER Roof Material SLATE-CLAY Wall Height 14 Partititions AVERAGE Interior Living Area (sq. ft.)52,800 Number of Units 1 Systems Heat TypeHOT-WATER Heat Fuel Gas Plumbing AVERAGE Condition & Grade Year Built1889 Overall ConditionGood Overall GradeExcellent Subareas Code Description Gross Area Living Area FUS Upper Story, Finished 26,400 26,400 BAS First Floor 13,200 13,200 FBM Basement, Finished 13,200 13,200 UAT Attic, Unfinished 13,200 0 Total: 66,000 52,800 Extra Features / Outbuildings DescriptionELEV-PSNGR Number of Units3.00 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.