About House Project Cost

House Project Cost is a small set of free calculators for what common home projects cost in the US. It exists because most cost guides give a single national range with no source, and homeowners have no way to tell whether a quote is fair.

Every estimate here comes from public data: the National Renewable Energy Laboratory's installed-cost database, wage statistics from the Bureau of Labor Statistics, Berkeley Lab's solar price research, NREL's solar output model and EIA's electricity prices. The methodology page lists each source and formula, and the math runs in your browser.

We do not sell leads, ask for your address or pass anything you type to contractors. The site is free and funded by ads.

House Project Cost is run by Bellemann UG; see the imprint. If you find a number that looks wrong, write to support@houseprojectcost.com.