The　precise　calculation　of　heating　degree-days　(HDD)　depends　on　the　correct　building　balance　point　temperature,　which　however　has　often　been　limited　by　ignoring　complex　impacts　of　local　climate　and　building　properties.　This　research　clarified　the　calculation　process　for　building　balance　point　temperature　and　HDD　and　provided　experimental　validation.　Then,　to　explore　the　impacts　of　local　climate　and　building　thermal　properties　on　balance　point　temperature　and　HDD,　31　representative　cities　with　heating　demands　located　along　the　Chinese　coastline　are　investigated　for　the　case　study,　involving　Cold　Zone　and　Hot　Summer　and　Cold　Winter　Zone.　The　results　show　that　as　insulation　regulations　have　become　more　stringent,　the　balance　point　temperature　in　the　surveyed　area　has　reduced　by　an　average　of　4.54　degrees　C　over　the　past　four　decades.　For　office　buildings　constructed　since　2015,　every　1　degrees　C　increase　in　outdoor　monthly　average　temperature　could　result　in　an　increment　of　calculated　balance　point　temperature　by　0.22　degrees　C　and　0.34　degrees　C　in　these　two　regions,　respectively.　The　deviation　of　HDD　values　calculated　from　the　obtained　balance　point　temperatures　in　Cold　Zone　is　much　wider　than　that　in　Hot　Summer　and　Cold　Winter　Zone,　with　respective　ranges　from　617　to　1509　degrees　C　d　and　from　228　to　788　degrees　C　d.　With　great　advantages　of　high　accuracy　of　calculation　results　as　well　as　low　sampling　frequency　of　input　weather　data,　HDD　calculated　from　monthly　temperature　data　can　be　considered　as　a　reliable　indication　for　heating　demand　prediction　as　well　as　an　index　for　building　energy　efficiency　climate　zoning.