2021 Heritage Impact Statement - 31 Wianamatta Circut, Cattai 31 Wianamatta Circuit Cattai c. 2021, Looking south at rear of the cottage from lawn area at rear [SRA Site Visit]. Sydney SurroundsHeritage Assessment Authors: Liz Gorman Client: Earthed Architecture This Statement of Heritage Impact has been prepared on behalf of the client for submission as part of an s4.55 application to modify stamped plans for alterations and additions to the dwelling at Lot 17 DP 270953: 31 Wianamatta Circuit, Cattai NSW. The property is listed as local heritage item 177 in Schedule 5 of The Hills Local Environmental Plan 2019. Alterations included an increase in depth of verandah paving at rear of new living areas by 500mm and alteration of landscape elements.