Firstly, I would like to congratulate the applicant on choosing a green roof design for their proposed dwelling. It can only be hoped that other dwellings in the area follow their lead.
Unfortunately, there are a few problems with the application as it currently stands that need further consideration.
The area where they propose to build on is an area of hanging swamp dominated by Gleichenia dicarpa. While the tops of the ferns died back during the 2019 drought, they have begun re-sprouting from their rhizomes over the last six months. The presence of this swamp community is important for two reasons, firstly, a proper environmental assessment of the site is likely required. Secondly, the permanently saturated soil of the site may require additional engineering assessment to ensure the foundations are secure.
The plants suggested for the site are not necessarily the most appropriate. The surrounding bush is dominated by Eucalyptus oreades, and this is probably a more sympathetic choice than the Eucalyptus saligna that the applicants are suggesting. Similarly, while Grevillea robusta are unquestionably magnificent trees, they are vulnerable to frost damage when young and so are rarely planted in the upper Mountains. Given that this part of Neale Street is one of the coldest parts of Katoomba due to the tunnel of cold air that flows down MacRae's Paddock, endemic shrubs are probably more appropriate. A combination of Hakeas, Banksias and Leptospermums adapted to Upper Mountains swamps would likely be the most appropriate. The species that are already naturally growing around the edge of this patch of swamp would be the most logical choice. Alternatively, the friendly volunteers at Katoomba Wild Plant Rescue Nursery would be able to suggest other appropriate species.
Finally, while I understand it is only mandatory to inform the owners of adjacent properties of a DA rather than their occupants, I believe that it is nevertheless a sign of good faith to inform impacted occupants, as it is they, rather than the owners, who will be directly impacted by the building. I believe that council should strongly encourage all applicants to reach out to all impacted residents, not just owners.
