Home improvement
Home Renovation Cost Calculator
Build a whole-project renovation budget from area, finish level and contingency.
Result
Renovation carries far more uncertainty than new build because you cannot see behind the walls until demolition. Fifteen to twenty per cent contingency is realistic, not pessimistic.
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About this calculator
How much contingency should a renovation carry?
Fifteen to twenty per cent for older properties. Wiring, plumbing, structure and asbestos surprises are common enough that a 10% buffer usually gets consumed early.
Should I renovate or move?
Compare the all-in renovation cost against the price gap to a house that already has what you want, including transaction costs. Renovation wins less often than people expect on pure economics.
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