27/10/2026
🏡 New project: a knockdown rebuild on flood-affected land in Dundas Valley
Our client wants a two-storey home where his parents can live under the same roof, with their own separate entry. A good brief. The site is where it gets interesting.
Council’s flood advice identifies the land as affected by floodway and flood storage, with overland flow from the local catchment.
The block also falls away from the street towards the rear.
📐 On a site like this, the floor plan is not the first decision. The levels are.
Before we refine the layout, we are resolving:
- Habitable floor levels above the flood planning level, with freeboard confirmed with Council’s engineer
- How water moves through the site, so the subfloor, fencing and landscaping do not block flow
- Garage and driveway levels that work with the street and the flood constraints
- Entry stairs and rear access that suit both households, including the parents’ separate entry
Get these right early and Council has a clear, coordinated DA to assess. Get them wrong and the redesign starts after lodgement.
📍 Planning a new home on flood-affected land in Sydney? Start with the flood information and a detail survey, then design.
✏️ Sketch is indicative only. Final levels are subject to Council’s flood engineer.