Updated August 15, 2026 · WattCostLab interactive tool
Compare up to three quotes without reducing a complex project to price alone. The tool highlights documented scope and exclusions; it does not rank contractor quality.
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A quote with more documented scope is not automatically better, and a lower quote is not automatically worse. Use the matrix to identify questions before signing: What is missing? What could become a change order? Who obtains permits? What happens if electrical or structural conditions differ from the assumption?
Combine solar, HVAC, EV charging, electrical and efficiency work in one budget.
WattCostLab does not verify contractors or provide legal advice. Licensing, insurance, permitting and contract requirements vary by jurisdiction.