Questions about your Hunters Hill project.
Can we assume the sandstone walls are suitable for another storey?
No. Existing materials, wall construction and foundations need assessment for the proposed loads. The right first step is to establish what is there before choosing an upper-addition design.
Are garden walls and trees relevant to an extension application?
They can be, particularly in a heritage setting. Identify significant landscape elements early so the design and access plan can respond to them.
Do we need a traditional-looking extension?
The appropriate response depends on the house and its significance. Explore scale, siting and the connection between old and new with the designer and heritage adviser before deciding the architectural approach.