▁for ▁the ▁care ▁and ▁up keep ▁there of ..." ▁and ▁ownership ▁passed ▁to ▁Fin ch ley ▁Urban ▁District ▁Council ; ▁its ▁free hold ▁is ▁now ▁owned ▁by ▁a ▁registered ▁Char ity , ▁' The ▁Avenue ▁House ▁Est ate ' ▁Char ity ▁number ▁ 2 1 0 3 4 5 , ▁of ▁which ▁the ▁principal ▁trust ee ▁is ▁the ▁London ▁Bor ough ▁of ▁Bar net . ▁ ▁The ▁house ▁and ▁ten ▁acres ▁of ▁grounds ▁have ▁been ▁le ased ▁to ▁the ▁Avenue ▁House ▁Est ate ▁Trust , ▁registered ▁char ity ▁ 1 0 9 3 9 0 8 , ▁for ▁a ▁period ▁of ▁ 1 2 5 ▁years ▁from ▁ 2 0 0 2 . ▁It ▁is ▁also ▁home ▁to ▁the ▁Fin ch ley ▁Society ▁and ▁their ▁archive . ▁ ▁Since ▁January ▁ 2 0 1 4 ▁the ▁estate ▁and ▁its ▁commercial ▁activities ▁have ▁been ▁promoted ▁as ▁Steph ens ▁House ▁& ▁Gard ens . ▁ ▁The ▁Steph ens ▁Collection ▁ ▁Avenue ▁House ▁is ▁home ▁to ▁The ▁Steph ens ▁Collection , ▁a ▁small ▁display ▁and ▁archive ▁of ▁material ▁rel ating ▁to ▁the ▁Steph ens ▁In k ▁company ▁and ▁Steph ens ▁family ▁and ▁relevant ▁local ▁history ; ▁ad mission ▁is ▁free . ▁ ▁The ▁Both y ▁ ▁The ▁Both y ▁was ▁built ▁as ▁a ▁large ▁w alled ▁garden ▁in ▁the ▁shape ▁of ▁a ▁castle ▁som etime ▁in ▁the ▁late ▁ 1 8 7 0 s . ▁It ▁is ▁one ▁of ▁the ▁earliest ▁non - R oman ▁concrete ▁structures ▁in ▁England . ▁▁ ▁A ▁project ▁to ▁restore ▁the