This report offersprocedures toestimate theareadistributionofbuilding typesinacommunity througha combinationofremotesensing,localexpertise,andfieldobservations.Theresultinginventorycanbeused forprobabilisticseismicriskanalysis.Thecommunityisfirstdividedintogeographicregions(referredtohere aszones)of relativelyhomogeneoususe.Theseproceduresshowhow toestimate theareadistributionof building types for one zone. One estimates the total building area in each zone by remote-sensing proceduresthatarenotdiscussedhere,andthenmultipliesbythedistributionestimatedusingthepresent procedures.Theresultisanestimateofthebuildingareaofeachbuildingtypeineachzone.Onerepeatsthe process foreachzoneinthecommunitytocreateanestimateofthebuildingareaofeachbuildingtypein thecommunity.Foursamplingstrategiesareofferedforsamplingazonedependingonwhether(a)thezone has homogeneous building heights, (b) all important building features are visible, (c) expert advice is availableonrecognizinghiddenfeatures,and(d)apriorestimatefromexpertsonbuilding-typedistribution isavailable.