Roof Replacement Cost Calculator
Use this planning tool to estimate a range based on roof size, material, access, complexity, tear-off and solar handling. Southern California ZIP codes use the ProjectGauge launch-market model; other ZIP codes use a national planning model.
Planning guidance, not a bid. Site conditions, decking damage, code upgrades, specialty ventilation, product choice, warranties and contractor overhead can move a real proposal outside this model.
Why roof replacement calculators give ranges
A roofing calculator that returns one exact number creates false precision. Contractors bid specific scopes, materials, access conditions and risk. ProjectGauge intentionally returns a range so homeowners can understand the likely order of magnitude and then inspect the written proposal.
What to do after you calculate
- Compare your written quote with the range.
- Check whether the quote clearly states major scope items and allowances.
- Compare multiple bids on the same scope.
- Ask questions about exclusions before signing.
Sources and calibration
- Angi — Los Angeles roof replacement cost, 2026
- This Old House — Roof replacement cost calculator, 2026
- ProjectGauge methodology and assumptions
More ProjectGauge guides
Roof Replacement Cost CalculatorBuild a planning range from size, material, stories, complexity, tear-off and solar handling.How to Compare Roofing QuotesCompare scope, allowances, warranties, permits and payment terms—not only price.Roofing Quote ChecklistA practical pre-signing checklist for scope clarity and common exclusions.Methodology & SourcesSee how ProjectGauge turns published market data into a homeowner planning model.