. ▁ ▁The ▁Griff ins ▁promoted ▁respect ▁for ▁the ▁natural ▁environment ▁by ▁plant ing ▁and ▁protect ing ▁native ▁trees ▁in ▁both ▁public ▁res erves ▁and ▁gard ens ▁and ▁by ▁establish ing ▁c oven ants ▁on ▁the ▁land . ▁ ▁The ▁c oven ants ▁placed ▁restrictions ▁on ▁land ▁uses ▁and ▁construction , ▁which ▁enabled ▁the ▁character ▁of ▁the ▁area ▁to ▁be ▁protected . ▁ ▁The ▁c oven ants ▁prevent ed ▁the ▁creation ▁of ▁buildings ▁that ▁were ▁out ▁of ▁place , ▁imp eded ▁views ▁or ▁were ▁too ▁dominant . ▁ ▁The ▁c oven ants ▁also ▁required ▁residents ▁to ▁pay ▁a ▁le vy ▁that ▁supported ▁the ▁on going ▁maintenance ▁of ▁res erves , ▁tree ▁plant ing ▁and ▁other ▁activities ▁designed ▁to ▁saf egu ard ▁the ▁natural ▁environment . ▁ ▁Today , ▁the ▁national , ▁state ▁and ▁local ▁govern ments ▁as ▁well ▁as ▁her itage ▁organis ations ▁acknow ledge ▁the ▁importance ▁of ▁protect ing ▁the ▁built ▁and ▁natural ▁environment ▁at ▁Castle c rag ▁and ▁have ▁established ▁controls ▁over ▁its ▁management ▁and ▁development . ▁ ▁Architecture ▁ ▁During ▁Castle c rag ' s ▁early ▁years , ▁houses ▁were ▁either ▁designed ▁by ▁Griff in ▁and ▁Mah ony ▁Griff in ▁( fif teen ▁were ▁built ) ▁or ▁approved ▁by ▁them . ▁The ▁houses ▁were ▁character ised ▁by ▁concrete ▁block ▁and ▁stone ▁found ▁at ▁the ▁site , ▁material ▁which ▁matched ▁the ▁natural ▁surr ound ings ▁( three ▁houses ▁were ▁built ▁using ▁kn it lock ▁only ). ▁ ▁The ▁use ▁of ▁these ▁materials ▁facil itated ▁the ▁quick ▁and ▁afford able ▁construction ▁of