Begin with what the existing home offers
Orientation, floor levels, structure, character, mature landscape and the relationship to the street can all be assets. A measured survey and an informed condition review help distinguish genuine value from costly constraints.
The question is not simply whether the house is old. It is whether the parts worth retaining support the home you want to create.
Test the planning and character context
Demolition, removal and new work can be affected by zoning, overlays, character, heritage, siting and other property-specific controls. A renovation can also trigger approvals depending on its scope.
Have the relevant architect, town planner, certifier and specialist consultants confirm the pathway. Do not assume demolition or retention is available based on a neighbouring property.
Compare outcomes—not only building area
Write one brief covering rooms, circulation, light, privacy, outdoor connection, storage, energy performance and the qualities you want to keep. Then test how convincingly renovation and rebuild options satisfy it.
A smaller, well-resolved intervention may outperform a larger project. Equally, forcing a fundamentally unsuitable plan to remain can create complexity without delivering the intended result.
Compare cost, risk and disruption on the same basis
Include design and consultant fees, approvals, demolition, temporary accommodation, site works, services, landscaping, contingencies, programme and finance implications in both scenarios. Exclusions can make one option appear artificially attractive.
Renovation carries existing-condition uncertainty. Rebuilding carries its own planning, demolition, site and scope risks. Neither route is automatically simpler or cheaper.
Bring the team together for a feasibility decision
An architect or building designer can test spatial options. The relevant consultants can identify planning, structural and site implications. A builder can contribute buildability, sequencing, procurement and early cost-driver input.
A good feasibility process may not produce a final answer immediately, but it should expose the assumptions that matter and define the next investigations needed.
Official sources and further reading
Approval, contract and regulatory requirements depend on the property and can change. Confirm current requirements with the relevant authority and qualified advisers.