How We Price

Every price range is taken from published cost data: national cost surveys, contractor cost guides and manufacturer or retailer installation pages. Each guide lists its sources at the end.

Where sources disagree, the guide shows the range most of them share and says which source reports which number. We do not invent prices or round them up.

Prices are national estimates, not quotes. Local labor rates, permits and the condition of your home change the final price, so always get written quotes from licensed contractors.