Renovation costs in Iowa run about 90% of the national average. A mid-range kitchen runs ~$22,500, a bathroom ~$10,800, and a full remodel ~$99/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.