Kammala jumla mai zuwa: Fritz Kühn's Bohnsdorf studio ya lalace gaba daya ta hanyar bombardment na Birtaniya a ranar 23 ga Disamba, 1943. An lalata hotuna, zane-zane da tsare-tsare.
Yaƙin ya ƙare a watan Mayu 1945: a tsawon lokaci Kühn ya sami damar sake ginawa, kuma daga baya ya faɗaɗa, ɗakin aikinsa, tare da taimakon ma'aikatan da suka taimaka masa kafin yaƙin da ke dawowa a hankali daga layin gaba ko sansanonin fursunoni. Da zarar an sake amfani da sararinsa, ya mai da hankali kan ba da gudummawa ga sake gina wasu mahimman gine-ginen Berlin, yana ba da sabbin shinge don sake gina ginin Arsenal na karni na 18 na Berlin. Ya kuma samar da sabbin shinge na banister don ciki da waje na Opera House. Rabin gabashin Berlin ya kawo karshen yakin a cikin yankin Soviet. Kashe-kashen yaƙi ya bar Jamus ta rasa ƙwararrun ma'aikata wanda, a game da yankin Soviet, ya kara tsanantawa ta hanyar ƙaura zuwa yankunan Amurka, Burtaniya da Faransa. A cikin sake ginawa da kuma fadada aikin aikinsa Kühn ya ba da gudummawa ga neman mafita ta hanyar daukar ma'aikata da horar da ɗalibai da yawa.