2011 Heritage Impact Statement: 7 Hillcrest Avenue, Gladesville The front boundary fence, garden and elevation, and gabled roof of No. 7 Hillcrest Avenue, Gladesville Sydney - NorthernHeritage AssessmentResearch Authors: Mr Nicholas Jackson and Dr Sue Rosen The objective of this report is to assess the heritage impact of additions and alterations to the residence at No. 7 Hillcrest Avenue, Gladesville. the property is situate in the Hunters Hill LGA.The proposed alterations and additions relate to upgrading the existing rear service wing and the addition of an attached pavillion.