Calculator
Roof Replacement Cost
Build a rough planning range for replacing a roof and checking whether a roofing quote explains tear-off, underlayment, flashing, ventilation, disposal, and warranty assumptions.
Quote confidence workflow
- 1. Build a rough planning range.
- 2. Check scope and line items.
- 3. Compare assumptions across bids.
- 4. Ask better questions before signing.
Planning estimate only. Not a contractor quote.
Low
$9,500
Typical
$13,500
High
$19,000
Actual prices vary by scope, materials, access, permits, labor, hidden conditions, and timing.
Formula: roofing square (100 sq ft) quantity x low/typical/high base assumptions x selected material, labor, and complexity factors. This creates a planning range only, not a contractor quote. Actual prices vary by scope, materials, access, permits, labor, hidden conditions, and timing.
Assumptions and cost factors
Labor factors
- Straightforward labor: Open access, ordinary scheduling, limited coordination.
- Typical labor: Normal access and standard crew assumptions.
- Difficult labor: Tight access, staging, occupied-home constraints, or specialized trade time.
Material factors
- Budget materials: Functional, widely available materials.
- Standard materials: Common mid-grade materials most quotes specify.
- Premium materials: Higher-grade products, finishes, or manufacturer systems.
Complexity factors
- Simple scope: Limited prep and few unknowns.
- Typical scope: Normal project conditions.
- Complex scope: Extra prep, repairs, code work, access, or design constraints.
Scope notes
- Roof pitch, layers, decking repairs, ventilation, flashing, and access can move a quote materially.
- Ask whether the quote includes tear-off, disposal, permits where required, drip edge, starter strip, and final cleanup.
What should be included in the contractor quote?
- Tear-off and disposal
- Underlayment or ice barrier
- Shingles or roofing system
- Flashing and pipe boots
- Ventilation work
- Decking repairs allowance
- Permit or inspection if required
- Workmanship and manufacturer warranty
Quote red flags
- No mention of tear-off layers
- No flashing details
- Large deposit before materials are ordered
- Warranty terms are verbal only
- Decking repairs priced only after work starts
Questions to ask contractors
- How many existing layers are included?
- What happens if damaged decking is found?
- Which exact shingle line and warranty are included?
- Are gutters, landscaping, and magnetic nail cleanup protected?
When repair vs replacement may make sense
- Repair may make sense for isolated storm damage, a few missing shingles, or localized flashing issues.
- Replacement is more likely when the roof is near end of life, leaks are recurring, or decking/ventilation problems are broad.
FAQ
Why do roof quotes vary so much?
Pitch, layers, access, ventilation, decking repairs, shingle system, and warranty scope can change labor and material assumptions.
Should the cheapest roof quote win?
Not automatically. Confirm the scope, flashing, disposal, insurance, warranty, and change-order pricing before comparing price alone.
These are editable educational planning assumptions, not exact national pricing data, a contractor quote, a bid, a guarantee, or professional construction, legal, insurance, or financial advice.