Renovation costs in Ohio run about 92% of the national average. A mid-range kitchen runs ~$23,000, a bathroom ~$11,040, and a full remodel ~$101/sqft.
Labor is the biggest local variable. Price your specific project in the renovation cost calculator, kitchen, bathroom or roof calculators.
Reserve ~15% for surprises, get at least three local quotes, and keep plumbing/structural layouts where possible to control cost.