Quick scenario presets
Square feet of roof to patch (shingles + underlayment). Most leak repairs are 25-100 sq ft.
Rotten plywood found under the leak. ~$8/sq ft installed. Leave 0 if none.
Estimated Roof Repair Cost
$550.00
Typical estimate - range $350.00 to $1,000.00
Repair Summary
Cost Breakdown
12,800+ estimates calculated this month
Last updated: 2026-06-03
What a Roof Repair Actually Costs
Roof repairs are priced by what failed, not by the size of the whole roof. That trips up a lot of homeowners who expect a flat per-square-foot number like a replacement. A cracked vent boot and a leaking chimney are both "roof leaks," but one is a $300 visit and the other can run past $2,000 once you factor in flashing and the rot underneath. Most small to medium repairs land between $350 and $1,500.
The calculator above lets you pick the repair type, enter the size, set how hard the roof is to access, and add any rotten decking you find. It gives you a low, typical, and high estimate so you can hand a client a real range instead of a guess. Try EstimationPro free to turn that estimate into a branded proposal and let it follow up with the homeowner automatically so you win more of the bids you already send.
Roof Repair Cost by Type
| Repair Type | Unit | Cost Range | Typical |
|---|---|---|---|
| Shingle / leak patch | per sq ft | $5-$20 | $11 |
| Vent / pipe boot | per boot | $150-$500 | $300 |
| Chimney / wall flashing | per location | $500-$1,800 | $950 |
| Valley repair / reflash | per linear ft | $15-$50 | $30 |
| Ridge vent / cap | per linear ft | $4-$15 | $9 |
| Skylight reseal / reflash | each | $300-$1,200 | $600 |
| Decking / sheathing | per sq ft | $3-$15 | $8 |
Ranges include material and labor. Most roofers add a $300 to $500 minimum service charge per visit. Source: EstimationPro pricing reference, 2026 material and labor data.
Worked Examples
Small: cracked vent boot, easy one-story access
- Repair: 1 boot x $300 typical x 1.0 access = $300
- Minimum service charge applies: $350 total
- This is why it never pays to call a roofer for one small item alone.
Typical: 50 sq ft shingle patch, easy access, no rot
- Repair: 50 sq ft x $11 typical x 1.0 access = $550
- Decking: none
- Total: $550 (range $350 to $1,000)
Large: chimney flashing on a 2-story roof with rotten decking
- Repair: 1 location x $950 typical x 1.25 access = $1,188
- Decking: 32 sq ft x $8 = $256
- Total: $1,444 (range about $694 to $2,506)
What Drives the Price Up
- Repair type. This is the biggest lever. A surface shingle patch is cheap labor; flashing and decking work means opening up the roof.
- Hidden rot. The leak you can see is rarely the whole story. Soft decking under the shingles runs $70 to $100 a sheet installed and you usually do not know until the roof is open.
- Roof access. Steep or three-story roofs need staging and fall protection, which adds 25% to 50% to labor over a walkable ranch.
- Water travels. The wet spot on the ceiling is rarely directly under the failure. Tracking the real source can turn a one-spot repair into two.
- Minimum charges. The trip, setup, and disposal cost the same for a small fix, so a $300 minimum floors almost every repair.
Where Roofers Lose Money on Repair Bids
The fastest way to eat your margin on a repair is quoting before you have been on the roof and in the attic. I have bid a "simple" leak over the phone, shown up, and found three failed boots plus soft decking that nobody budgeted for. I price the failed component by its real unit, add an access factor for anything that is not a walkable one-story, and write a clear decking allowance so a soft deck is a conversation, not a fight.
Sizing a bigger job or deciding between repair and replacement? Our roof replacement cost calculator runs the full-tear-off number, the roofing calculator builds a complete material takeoff, the roof square footage calculator converts measurements to squares, and the shingle calculator dials in bundle counts for the patch.
When you are ready to send the real number, EstimationPro builds the line-item estimate, turns it into a professional proposal, follows up with the homeowner automatically so the bid does not go cold, and invoices the job when it is done. Try EstimationPro free.
Roof Repair Cost Guide
What roof repairs really cost by type, when to repair vs. replace, and how contractors price a leak fix.
How Much Does Roof Repair Cost?
Most roof repairs run $350 to $1,800, with the average homeowner spending around $400 to $1,500 for a small to medium fix. Price depends on what failed, how big the damaged area is, and how hard the roof is to get on. A cracked vent boot might be a $300 minimum-charge visit; a chimney that has been leaking long enough to rot the deck can climb past $2,500.
Roofers price repairs three ways depending on the problem:
- By the square foot for shingle patches and leak repairs - typically $5 to $20 per sq ft including shingles and underlayment.
- By the location or unit for flashing, vent boots, and skylights - chimney flashing alone runs $500 to $1,800 per chimney.
- By the linear foot for valleys and ridge work - $4 to $50 per foot depending on the detail.
Almost every roofer carries a minimum service charge, usually $300 to $500, that covers the trip, setup, and disposal even on a tiny repair. It rarely pays to call someone out for a single shingle.
Key Takeaways
- Small to medium roof repairs average $350 to $1,500
- Shingle and leak patches run $5 to $20 per sq ft installed
- Most roofers charge a $300 to $500 minimum per visit
Roof Repair Cost by Type
The repair type sets the price more than anything else. A surface shingle patch is cheap labor; opening up flashing or replacing rotten decking is where the bill grows.
- Shingle / leak patch: $5-$20 per sq ft. A 50 sq ft patch lands around $550.
- Vent / pipe boot replacement: $150-$500 per boot. Cracked rubber boots are the most common hidden leak I find.
- Chimney or wall flashing: $500-$1,800 per location for new step and counter flashing.
- Valley repair or reflash: $15-$50 per linear foot.
- Ridge vent / cap repair: $4-$15 per linear foot.
- Skylight reseal / reflash: $300-$1,200 each (a full skylight replacement runs $1,500-$4,500).
- Decking / sheathing replacement: about $3-$15 per sq ft, or $70-$100 per sheet installed, when rot is found under the leak.
Steep or multi-story roofs add 25% to 50% to labor because of setup and fall protection. A walkable one-story ranch is the cheapest roof to work on.
Key Takeaways
- Vent boots are the most common and cheapest leak source to fix
- Chimney flashing is the priciest common repair at $500-$1,800
- Steep or 3-story access adds 25% to 50% to repair labor
Repair vs. Replace: When Each Makes Sense
Repair a roof when the damage is localized and the rest of the roof has real life left; replace it when failures are spreading or the shingles are near the end of their lifespan. I have patched plenty of roofs that had five good years left, and I have told homeowners to stop throwing money at a 22-year-old roof that needed a third repair in two years.
Lean toward repair when:
- The damage is one area - a wind-torn section, a single failed boot, one leaking valley.
- The roof is under 15 years old and the rest of the field looks sound.
- Granule loss and curling are isolated, not roof-wide.
Lean toward replacement when the roof is past 20 years, you are seeing leaks in multiple spots, or a repair would cost more than 30% of a full replacement. At that point a patch is just buying time. Compare the numbers with our roof replacement cost calculator before you decide.
Key Takeaways
- Repair localized damage on roofs under 15 years old
- Replace when leaks show up in multiple areas or the roof is past 20 years
- If a repair tops 30% of replacement cost, replacement is usually the better buy
How to Use This Calculator
Pick the repair type
Choose what actually failed: a shingle or leak patch, flashing, a vent boot, a valley, ridge work, a skylight, or decking. Each carries the right per-unit rate from the EstimationPro pricing reference.
Enter the size
Punch in the damaged area in square feet, the linear feet of valley or ridge, or the number of boots, flashing locations, or skylights. The label changes to match the repair you picked.
Set the roof access
A walkable one-story is easy. A two-story or 6:12-to-9:12 roof is moderate, and a steep or three-story roof that needs fall protection is difficult. Access adds 25% to 50% to labor.
Add any rotten decking
If you find soft plywood under the leak, enter the square feet to replace. The calculator adds it as its own line and gives you a low, typical, and high estimate you can hand a client.
Roof Repair Cost Formula
Repair Cost = Quantity x Rate per Unit x Access Factor
Decking Cost = Decking Sq Ft x $8
Subtotal = max(Repair Cost, $350 minimum) + Decking Cost
Total = Subtotal x Regional FactorWhere:
- Rate per Unit
- = Patch $11/sq ft, boot $300 each, flashing $950/location, valley $30/lf, ridge $9/lf, skylight $600 each, decking $8/sq ft (typical)
- Access Factor
- = 1.0 easy walkable, 1.25 two-story/steep, 1.50 three-story or 10:12+
- Minimum Charge
- = $350 floor covering trip, setup, and disposal
- Decking Rate
- = $3-$15 per sq ft installed ($70-$100 per sheet) when rot is found
- Regional Factor
- = Adjusts material and labor to your state when a location is entered
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Frequently Asked Questions
How much does it cost to repair a roof?
Most roof repairs run $350 to $1,800, with the average small to medium fix landing around $400 to $1,500. A cracked vent boot can be a $300 minimum-charge visit, while chimney flashing with rotten decking underneath can pass $2,500. The biggest factors are the repair type, the size of the damaged area, and how hard the roof is to get on.
How much does it cost to fix a roof leak?
A typical roof leak repair costs $350 to $1,200. The price depends on the source: a failed pipe boot is the cheapest at $150 to $500, a shingle patch runs $5 to $20 per sq ft, and flashing around a chimney or wall runs $500 to $1,800. The catch with leaks is that water travels, so the wet drywall spot inside is rarely directly under the actual roof failure.
How do contractors estimate a roof repair?
I price repairs by what failed, not by the whole roof. A patch is priced per square foot of shingles and underlayment, flashing and skylights are priced per location, and valleys and ridge are priced per linear foot. Then I add an access factor for steep or multi-story work and a line for any rotten decking I expect to find. I always carry a minimum service charge because the trip, setup, and disposal cost the same whether it is one shingle or ten. Build the full line-item bid fast with our roofing calculator.
How do contractors price a roof leak repair for a client?
Start with the failed component and its per-unit rate, add the access multiplier, then add a decking allowance so a soft deck on the day of work is a conversation instead of a fight. For a 50 sq ft shingle patch on a walkable roof: 50 x $11 = $550. If you cut out one sheet of rotten decking, add about $256 (32 sq ft x $8). Always write the decking as an allowance line. Generate the proposal in minutes with this roof repair cost calculator and EstimationPro.
Should I repair or replace my roof?
Repair when the damage is localized and the roof is under about 15 years old with a sound field. Replace when leaks show up in multiple spots, the shingles are past 20 years, or the repair would cost more than 30% of a full replacement. At that point a patch is just buying time. Compare the two numbers with our roof replacement cost calculator before you commit.
Does insurance cover roof repairs?
Homeowner insurance usually covers sudden, accidental damage like a tree limb, hail, or wind, but not wear-and-tear or neglected maintenance. A 5-year-old roof torn up by a storm is likely covered; a 25-year-old roof leaking from age is not. Document the damage with photos before any temporary tarp, and get a written estimate. For a budget number to compare against the adjuster, use our roofing calculator.
What does this roof repair estimate leave out?
This is a budget number for the repair labor, materials, and any decking you enter. It does not include permits, interior drywall or paint repair from the leak, full skylight replacement, structural framing fixes, or steep-slope surcharges beyond the access factor. Water damage inside the house is its own line. Always get on the roof and into the attic before you commit to a final number.
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