Roofing · Cost guide

Roof leak repair cost:
what it costs now, and what it costs if you wait

By Oleksii Chelbaiev Last checked September 26, 2026 7 sources

HOW MUCH DOES IT COST TO FIX A ROOF LEAK?

$150–$1,500

Most roof leaks cost $150 to $1,500 to fix, and published averages sit around $800–$900. A leak left for months costs more, because the ceiling, insulation and sometimes mold have to be dealt with too.

Fixr puts the typical range at $350–$1,500. HomeGuide lists minor leaks at $150–$1,000. Your quote may vary.

What a "small" roof leak turned into: my apartment

I rent a top-floor apartment, right under the roof. It started with a few dark spots on the sloped ceiling. Then the paint began to bubble. Then the wall near the window felt damp, the room started to smell musty, and eventually water dripped onto the blinds and windowsill.

We told the landlord. He waited, then hired a handyman crew for a quick patch. It helped for a while, but it didn't fix the cause. A proper repair meant replacing the roof, which he told us would cost about $20,000. Instead, he sold the building. I don't know what the new owner was told.

Small bubbles in the paint on a sloped ceiling — **Stage 1** Paint starts to bubble on the sloped ceiling. Water is already behind it.

Brown water stains on window blinds and the windowsill — **Stage 2** Brown drips on the blinds and sill. The water now runs down the wall.

Dark mold spots on the ceiling above a window — **Stage 3** Dark mold spots above the window.

Photos from that apartment.

The lesson: a leak doesn't stay the same size. A repair that costs a few hundred dollars in the first weeks can grow into drywall, insulation and mold work, and sometimes a new roof. The EPA advises drying water-damaged materials within 24–48 hours to prevent mold. A slow roof leak keeps them wet for months.

What waiting adds to the bill

Each stage adds work on top of the leak repair. Bars show a rough total at each stage.

1
Caught earlyFix the leak itself

$150–$1,500Fixr, HomeGuide
2
Stains and bubbling paintLeak + patch and paint the ceiling

$200–$500 extraHomeGuide
3
Wet, sagging ceilingLeak + new drywall + paint

$500–$2,500HomeGuide
4
MoldAdd mold remediation

$1,500–$6,000 extraHomeGuide (up to $15,000 in attics)
5
Roof at the end of its lifeReplace the roof

$5,700–$16,000HomeGuide

$100$1k$10k

Bars use a log scale, so each step to the right is about ten times more money. Ranges are national published figures, not quotes.

Is it the roof, or something else?

Before you pay a roofer, check that the water is actually coming from the roof. A stain on the ceiling can also come from plumbing, a window, or condensation. These clues help narrow it down.

What you notice	Most likely source	Who to call first
Stain grows only when it rains, on the top floor	Roof: shingles, flashing, vent boot	Roofer
Water appears after wind-driven rain, around a window	Window seal, siding or flashing above the window	Roofer or window installer
Stain under a bathroom, whether or not it rains	Plumbing: shower, toilet, drain or supply line	Plumber
Damp spots in winter, worse on cold mornings, often near exterior corners	Condensation from poor ventilation or insulation	Roofer or insulation contractor to check the attic
Icicles along the eaves, leak near the edge of the roof in freezing weather	Ice dam	Roofer

If you can safely get into the attic with a flashlight during or right after rain, look for wet wood or dark streaks on the underside of the roof deck. Water often runs along a rafter before it drips, so the leak on the roof can be several feet away from the stain on your ceiling.

Roof leak repair cost by cause

Three guides price the same causes differently. A dash means the guide doesn't list it.

Valleys and skylights are priced almost the same by every guide. Chimneys vary the most, because a "chimney leak" can mean new sealant or rebuilding the crown.
Cause	HomeGuide	Fixr	Angi
Clogged gutters	—	$100–$250	$30–$200
Vent or pipe boot	$100–$500 (vent) $250–$600 (pipe boot)	$100–$600	$40–$650 (seals)
Missing or damaged shingles	$100–$300 (up to 25)	$150–$450	$80–$1,700
Nail pops	$200–$500	$200–$500	—
Flashing	—	$200–$600	$200–$900
Skylight	$225–$800	$300–$800	—
Roof valley	$300–$1,500	$300–$1,500	—
Ice dam	$350–$1,500 (removal)	$400–$1,500	$300–$4,000
Chimney	$150–$700 (minor)	$200–$3,500	$800–$9,000 (cracks)

What else ends up on the invoice

Item	Cost	Source
Inspection to find the leak	$100–$400	HomeGuide
Roofer labor	$40–$100/hour	HomeGuide ($45–$80 per Angi, about 70% of the bill)
Ceiling patch and paint	$200–$500	HomeGuide
Ceiling drywall replacement with leak fix	$500–$2,500	HomeGuide
Mold remediation	$1,500–$6,000	HomeGuide, up to $15,000 for extensive attic damage
Permit	$70–$250	HomeGuide

For prices on other roof repairs and roof materials, see our roof repair cost guide.

What to do in the first 24 hours

Put a bucket under the drip and move furniture, rugs and electronics out of the way.
If the ceiling is sagging or water is near a light fixture, stay out from under it and switch off power to that area at the breaker.
Take dated photos of the stain, the ceiling and anything damaged. You'll need them for insurance or your landlord.
Don't climb onto a wet roof. A roofer can put a tarp over the area until it's dry enough to repair.
Dry what you can with fans or a dehumidifier. The EPA says drying within 24–48 hours usually prevents mold.
Homeowners: call your insurer before paying for major work. Renters: tell your landlord in writing (see below).

If you rent in Washington State

A roof leak in a rental is the landlord's job to fix. Under Washington's Residential Landlord-Tenant Act, the landlord must keep the roof and other structural parts in reasonably good repair and keep the home reasonably weathertight (RCW 59.18.060).

Tell them in writing. The notice should name the address, the owner if you know it, and the problem. Keep a copy and your photos (RCW 59.18.070).
Know the deadlines. After written notice, the landlord generally has up to 10 days to start repairs, or 24 hours if the condition is imminently hazardous to life.
Get help before withholding rent. The law sets strict steps for tenant remedies. WashingtonLawHelp.org has free guides.

This is general information, not legal advice.

Frequently asked questions

How much does it cost to fix a roof leak?

Most roof leaks cost $150 to $1,500 to fix. Fixr puts the average at about $800 and Angi at about $900. Leaks that have soaked the ceiling or caused mold cost more, because that damage has to be repaired too.

How much does it cost to find a roof leak?

A roof inspection to trace a leak typically costs $100 to $400, according to HomeGuide. Some roofers credit that fee toward the repair.

Is a small roof leak an emergency?

Not always, but it gets worse over time. The EPA advises drying water-damaged materials within 24 to 48 hours to prevent mold. A slow leak keeps drywall and insulation wet for weeks, which is how a small repair turns into ceiling and mold work.

How much does it cost to fix a ceiling after a roof leak?

HomeGuide lists $200 to $500 to patch and paint water-damaged drywall, and $500 to $2,500 for a fuller repair that includes fixing the leak and replacing drywall.

Who pays for a roof leak in a rental in Washington?

The landlord. Washington law requires landlords to keep the roof in reasonably good repair and the home reasonably weathertight (RCW 59.18.060). Tenants should give written notice and keep copies and photos.

Oleksii Chelbaiev

Runs a small home-improvement business in Washington State and has lived with the roof leak described above. He built Fair Home Cost to put published repair prices side by side, with sources. How we research

Sources

All sources accessed September 26, 2026.

These figures are estimates compiled from the published sources above. They are not quotes and can't account for your roof, your location or your contractor. Get written estimates from licensed, insured roofers before deciding. See our disclosure and disclaimer.