Free planning tool
See a defensible range for the whole project, not a precise-looking number built from the product price alone.
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Choose the closest project lane, enter the advertised price, then calculate. Your result stays put until you calculate again.
Method
The calculator starts with the price you enter. It applies a 20 percent low-to-high spread to foundation, electrical, HVAC and wired internet assumptions, and a 25 percent spread to permits and delivery access. Distance changes the electrical and internet baselines.
It then adds a contingency of 5 percent at the low end and 12 percent at the high end. The result is a national planning range in US dollars. It is not adjusted for ZIP code, local wages, soil, climate or a specific brand's included scope.
For kits and shed conversions, add any known assembly, roofing, insulation and interior finish quotes to the product price before calculating. Confirm every line with local pros before you place a deposit.
Editorial review: . Assumptions are reviewed when our cost or site-work guidance changes.
It is an early planning range, not a contractor quote. It helps you compare the advertised price with the site work that often sits outside it. Local labor, soil, access, codes and utility conditions still decide the final number.
A single number would imply certainty the inputs cannot support. The calculator gives each line item a low and high allowance, then adds a 5 to 12 percent contingency.
The lane sets a starting product price and the most useful next step. It does not add a lane multiplier. For a kit or shed, include known assembly, insulation and interior finish costs in the price field before calculating.
The estimate does not price land, financing, major electrical-panel work, structural engineering, plumbing, an ADU conversion, or unknown kit assembly and shed interior finish labor.