The core model
BeforeQuote estimates are designed for early planning. Most calculators start with a measurable quantity, apply a material or installed-cost rate, then adjust for local cost level, project complexity, demolition, permits, and contingency where appropriate.
A typical formula looks like this: quantity x unit cost x location multiplier x complexity multiplier + fixed add-ons + removal + permit allowance + contingency.
Location multipliers
| Market | Multiplier |
|---|---|
| Low-cost area | 0.85 |
| Average U.S. market | 1 |
| High-cost metro | 1.2 |
| Very high-cost metro | 1.35 |
Complexity multipliers
| Project complexity | Multiplier |
|---|---|
| Easy | 0.9 |
| Standard | 1 |
| Difficult | 1.15 |
| Complex | 1.35 |
Why ranges are shown
Real quotes vary by contractor scope, schedule, material availability, local code, site access, and hidden conditions. BeforeQuote shows low, typical, and high estimates so users can compare assumptions before they speak with contractors.
What estimates do not include
These tools do not replace inspections, engineered designs, permit review, hazardous material testing, insurance claim scope, or licensed trade advice. Each calculator lists important exclusions in its guide.