Why contractor quotes vary — every trade
Two honest contractors can quote different numbers for the same address. Here is what actually moves the total — without inventing dollar tables.
Estimates adjust using federal producer-price and Phoenix wage indexes (FRED/BLS).
Macro indexes explain why material and labor bands drift over time. They do not replace a site visit, a clear scope, or your contractor’s judgment.
Labor
Crew rates, skill mix, and productivity differ by trade and company. Regional wage pressure varies; your contractor’s actual payroll may sit above or below the local band.
Materials
Commodity and trade-specific materials move over time. Paint, drywall, lumber, copper, concrete, and equipment each have their own cost path.
Access and protection
Height, occupied homes, furniture protection, HOA rules, and parking change hours and risk — often more than the “base” scope suggests.
Scope clarity
Vague line items, missing prep, allowances, and exclusions are the most common reason two bids look incomparable. A lower number with thinner scope is not a better deal.
Overhead and risk
Insurance, warranty posture, schedule compression, and contingency are real costs. Rock-bottom bids often underprice risk.