The underestimated part of renovation budgeting
Buyers often estimate the visible works and stop there. Kitchen, bathroom, flooring, paint. That part is familiar. The hidden part is usually what creates the blowout: planning friction, delayed trades, permit lag, living disruption, and the management load that falls back onto you when the project goes off script.
That is why this estimator explicitly includes council permits, temporary accommodation, project management time, and delay compounding. Those categories are not optional footnotes. They are the reason many “easy cosmetic updates” stop feeling easy once the project is live.
A renovation can be affordable in theory and still destabilise the whole purchase
If the purchase only works by assuming a clean renovation with no timing slip, no permit friction, and no living disruption, the property is more fragile than it looks.
If the renovation is central to whether the property works for you, pair this with the property comparison sheet so you can compare the “cheap but needs work” option against the “less work, higher price” option on the same page.