The 8-step framework

1. STEP 1

   Be clear what "renovate" means for your home

   A renovation reworks the layout, materials and systems inside the existing footprint - new kitchen, reconfigured living, re-roof, rewire. It is not the same as an extension (adding floor area) or a rebuild (starting again). If you mostly need the same rooms done better, renovation is usually the honest answer. If you need a fundamentally different home, keep reading.

2. STEP 2

   Get a building inspection and an engineer in early

   A pre-renovation building inspection ($400-$700) plus a structural engineer’s opinion tells you whether the bones are worth keeping. Failing footings on reactive clay, widespread restumping, or a roof structure at end of life can quietly turn a "simple reno" into rebuild money. Pre-1985 homes also carry asbestos risk that must be surveyed first.

3. STEP 3

   Apply the 50-60% rule

   The industry rule of thumb: when a renovation would cost more than roughly 50-60% of a new build, a knockdown rebuild often becomes the smarter choice. Renovations on older Adelaide homes frequently uncover hidden costs - asbestos ($5k-$25k), restumping ($10k-$30k), rewiring ($15k-$30k) - that push the total past that line without you noticing.

4. STEP 4

   Check your block for planning overlays first

   Check your block on the PlanSA property lookup for Heritage, Character or Hills Face overlays before you design anything. A character or heritage overlay can make demolition hard to approve - which often makes a sympathetic renovation the only realistic path. A clean block keeps a rebuild on the table.

5. STEP 5

   Price both paths on the same end-state

   Get a renovation quote and a rebuild quote against the same finished home you actually want - same bedrooms, same living zones, same finish level. Comparing a patch-up renovation against a fully-finished new build is the most common way families end up spending renovation money for a home that still feels old.

6. STEP 6

   Factor the renovation risks people underestimate

   Renovations have the highest hidden-condition risk of any path: asbestos in pre-1985 walls and eaves, non-compliant old wiring and plumbing discovered once walls open up, and the cost of matching new work to old. Budget a contingency of 15-20% on any older-home renovation, and make sure your contract assigns discovery risk fairly.

7. STEP 7

   Factor what a rebuild actually delivers

   A rebuild is more than the build cost ($550k-$900k excl. land for a typical Adelaide home): add demolition ($15k-$40k), service disconnections ($2k-$5k) and 9-14 months of holding/rent. In return you get a brand-new home with full structural warranties and a mandatory 7-star energy rating - versus a renovated home that typically lands at 4-5 star even after a deep retrofit.

8. STEP 8

   Weigh the lifestyle and emotional factors honestly

   Keeping the character of a home you love, staying in your street and school zone, and avoiding a year of displacement all have real value. Sometimes they justify renovating even when the numbers lean rebuild. Name those trade-offs out loud with the whole household before you commit either way.

FAQs