HOME EXTENSION PLANNING · MELBOURNE
Planning a Home Extension: What Should You Check First?
Before drawing the extension, understand what the property and existing house will allow you to do.
Short answer
The best first step is not choosing finishes or room sizes. Check the site, planning controls, title, existing structure, services, access and the way the new work must connect to the current home. Those constraints shape what is practical and how confidently the project can be budgeted.
Check the property controls
Planning zones, overlays, title restrictions, easements and neighbouring conditions can affect where and how an extension is designed.
Not every extension needs a planning permit, but the requirement should be checked rather than assumed.
- ✓Planning zone and overlays
- ✓Title and easements
- ✓Setbacks and site coverage considerations
- ✓Heritage or vegetation controls where applicable
Understand the existing house
The design needs to work with the current structure, roof, levels, openings and services. Major structural changes can be worthwhile, but they should be understood early because they affect engineering, temporary support and cost.
Accurate measurements and a site inspection are more useful than designing from assumptions.
Define the problem the extension must solve
Write a short project brief before the concept design starts. Focus on how the home needs to function, not just how many rooms you want to add.
This helps the designer and builder compare options such as reconfiguring existing rooms, extending at ground level or considering an upper level.
Bring budget and buildability into the design early
A concept that fits the planning rules still needs to fit the budget and construction realities. Early builder input can identify access, structural and staging issues before they are embedded in detailed documents.
Questions homeowners ask
Do all home extensions need a planning permit?+
No. The answer depends on the planning scheme, overlays, property and proposed work. A building permit is a separate approval and may still be required.
Should I get engineering before concept design?+
Usually the sequence is coordinated so the concept is developed with enough structural understanding to be realistic, then engineering is progressed as the design is resolved.
What if I want to live in the house during the extension?+
Discuss staging and site separation early. Whether occupation is practical depends on the work area, services, access and safety requirements.
Can EBC review an early extension concept?+
Yes. Early review can help identify likely construction and pricing issues before documentation is finalised.
Ready to discuss your project?
Tell EBC what you are planning and we will help you work through the practical next steps.
Related EBC pages
- Home Extension Costs in Melbourne
- Planning Permit vs Building Permit
- Renovate, Extend or Rebuild?
- Builder Site Inspection Guide