 <translate> To answer this question, we should know that: The first residential tower block, "The Lawn" was constructed in Harlow, Essex in 1951; it is now a Grade II listed building.
So, the answer is 1951. <yor> Ká tó lè dáhùn ìbéèrè yìí, ó yẹ ká mọ̀ pé: Wọ́n kọ́ ilé gogoro tí wọ́n ń pè ní "The Lawn" nílùú Harlow, ní ìpínlẹ̀ Essex, lọ́dún 1951; ní báyìí, ó ti di ilé tí wọ́n kà sí ilé tó dára jù lọ. Nítorí náà, ìdáhùn náà ni 1951. 