How We Estimate Renovation Costs
Our calculators return installed price ranges in 2026 US dollars: the total a homeowner would typically pay a contractor for labor, materials, standard permits and disposal. They are planning estimates, not quotes.
Where the numbers come from
Each price range is built from several independent references and cross-checked against the others:
- Published national remodeling cost studies, including the Remodeling Cost vs. Value report.
- Construction labor wage data from the US Bureau of Labor Statistics and material price trends from the BLS Producer Price Index.
- Current retail prices for common materials such as tile, flooring, cabinets, shingles and decking.
- Published contractor price lists and national cost guides.
- Building code requirements that affect scope, such as egress windows and permits, based on the International Residential Code.
How the calculators work
Every calculator combines a fixed project cost (mobilization, permits, minimum trade charges) with a cost per square foot that depends on the finish level or material you choose. Small projects carry a higher cost per square foot because the fixed portion is spread over less area, which matches how contractors actually price work.
Optional extras, like moving plumbing or adding stairs, are added as either a fixed amount or a cost per square foot. Factors such as roof pitch, ceiling height or deck height scale the whole estimate.
Regional adjustment
Labor rates differ widely across the US. The location setting scales the national average: about 0.85× for lower-cost rural areas, 1.2× for higher-cost metros such as Denver, Seattle or Boston, and 1.4× for the most expensive markets such as New York City and the San Francisco Bay Area. For a specific city, see our local cost guides.
Labor, materials and contingency
The labor and materials split is a typical share for each project type (for example, about 80% labor for interior painting and 40% for kitchens, where cabinets dominate). The contingency figure adds 15% to the high end of the range, which is the buffer most contractors recommend for problems found after demolition, such as rot, outdated wiring or damaged subfloors.
Updates
We review every calculator at least twice a year and when material or labor prices shift noticeably. Each page shows the date it was last updated.
Limitations
- Estimates assume a structurally sound home with no major code violations.
- Prices do not include design fees for architects or engineers unless stated.
- Custom, luxury and historic projects can exceed the high end of our ranges.
- Always get at least three itemized quotes from licensed, insured contractors.
Spotted a price that looks wrong for your area? Tell us and we will review it.