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Where our numbers come from

Quantities come from your answers using standard formulas (for example, a roofing square is 100 sq ft of sloped roof). Budgets are planning numbers, not quotes.

Researched U.S. market ranges

Being rebuilt from independent sources

Ranges are published per job only after research from the independent public sources below, dated when read. Until then, jobs show a measured scope with pricing pending. Never a quote.

Unknown answers

Assumed and shown

If you aren't sure, we assume a typical value, label it as assumed and widen the range.

Business-entered rates

Available per business

Used only for that business's quotes and calculator; not a public benchmark.

Illustrative example rates

Synthetic

Only in “Try an example” mode, always labeled, never saved.

Customer sales tax

Not verified

Shown as “pending confirmation” unless the business sets its own rate.

Permits and incentives

Not included

Ask your pro or local building office.

Photo analysis

Not offered

QuoteAndGrow doesn't read photos to measure or diagnose.

How we research prices

Researched U.S. market ranges are built only from independent public sources, each dated when read. They are planning context, not a quote. Methodology updated September 2026.

  • Quarterly Solar Industry Update (Nov 19, 2025) · U.S. Department of Energy — Residential rooftop solar installed price per watt — used for “Install solar” only
    Figure
    $3.2–$4.2 per Wdc
    Unit
    Dollars per watt, direct current (Wdc)
    Scope
    Installed residential PV system price
    Published
    November 19, 2025
    Prices observed
    First half (H1) 2025
    Reviewed by us
    September 27, 2026
    Geography
    United States national average
    Dollar basis
    Nominal U.S. dollars as reported (not inflation-adjusted by QuoteAndGrow)
    Method
    Range spans DOE's modeled and reported residential pricing methods
    Not included
    Batteries, roof work, panel upgrades, ground mounts, incentives, tax credits and sales tax are not added or subtracted by QuoteAndGrow
  • Tracking the Sun (project-level installed-price data) · Lawrence Berkeley National Laboratory — Cross-check context for solar only; no dollar figure taken from it until its data is inspected
  • Occupational Employment and Wage Statistics (OEWS) · U.S. Bureau of Labor Statistics — Labor wage benchmarks by trade and area — never shown as a contractor price
  • American Community Survey (ACS) · U.S. Census Bureau — Housing size, age and type context
  • HUD housing data and program resources · U.S. Department of Housing and Urban Development — Housing context where relevant
  • Official permit-fee schedules · State, county and city building departments — Permit fees — local only, never averaged into a national number
  • ENERGY STAR product data · U.S. EPA — HVAC and appliance efficiency and equipment context
  • Energy Saver and appliance standards · U.S. Department of Energy — HVAC, water heating and insulation context
  • Published MSRP and distributor catalogs · Manufacturers and distributors — Equipment and material benchmarks, cited per item — never shown as an installed price on their own
  • Extension guidance and official utility rate schedules · USDA and university extension services; utilities — Lawn, landscape and utility-related context
  • Published contractor price books · Named, non-competitor contractor price books — Only when the publisher is clearly identified and not a competing estimate site

For an exact price, a business's own estimator uses its configured products, labor, fees, service area and options.

Status as of September 2026. Start an estimate