Short answer: Stop the water first, then find the source. Shut off the main water valve if the leak could be plumbing, turn off power to any circuit where water is near lights or outlets, and catch the drip. If the ceiling is bulging with water, Bob Vila suggests making a small hole so it drains into a bucket instead of spreading. A leak in a top-floor ceiling usually comes from the roof; on a lower floor, it is usually plumbing above.
Quick diagnosis
| What you notice | Most likely cause | What to check | Call a pro? |
|---|---|---|---|
| Water through a top-floor ceiling during rain | Roof or flashing leak | Check the attic | Roofer |
| Water under a bathroom, any weather | Toilet, tub, shower or supply line | Shut off water; check fixtures above | Plumber |
| Steady leak that does not stop when fixtures are off | Pressurized supply pipe | Shut off main water valve | Plumber, now |
| Water from a light fixture or ceiling vent | Leak above reaching wiring, or AC condensate | Turn off the circuit at the breaker | Yes |
| Ceiling sagging with a water bubble | Water trapped on the drywall | Drain it into a bucket; stay clear | Yes |
| Leak near the AC air handler in the attic | Clogged condensate drain or pan | Turn the AC off | HVAC |
Do this now
- Shut off the water at the main valve if the leak might be plumbing (it usually is on a lower floor).
- Make it safe: if water is near a light, fan, outlet or the ceiling is soaked around fixtures, turn that circuit off at the breaker. If you have to stand in water to reach the panel, do not; call an electrician or the utility.
- Catch and protect: put a bucket under the drip and move or cover furniture and electronics.
- Drain a bulge: if paint or drywall is ballooning with water, poke a small hole at the lowest point with a screwdriver, with a bucket below, so it drains in one spot.
- Take photos of the damage and the source before cleanup for your insurer.
Find the source
- Top floor, during or after rain: roof, flashing, a chimney or a vent. See our roof leak guide.
- Lower floor, under a bathroom or kitchen: a toilet seal, shower pan, drain or supply line. Run each fixture separately with the water back on to see which one drips.
- Near the AC in summer: a clogged condensate drain or overflowing pan.
After the leak stops
Dry the area fast with fans and a dehumidifier. The EPA says wet materials dried within 24 to 48 hours usually do not grow mold. Soaked drywall and insulation often need to be cut out and replaced, and a water damage restoration company can dry hidden cavities.
When to call a professional
- Water keeps coming after you shut off the main valve (likely the roof) or you cannot find the source.
- Water is near wiring, lights or the electrical panel.
- The ceiling sags badly or has already partly collapsed.
- A large area is soaked or the water is from a toilet or drain (contaminated).
What it usually costs
HomeGuide (2026) lists most water damage restoration jobs at about $2,000 to $6,000, with water extraction and drying around $4 to $6 per square foot for clean water and $9 to $12 for sewage. Drywall replacement runs about $1.50 to $3.50 per square foot.
Frequently asked questions
Who do I call for water leaking through the ceiling?
A plumber for leaks under bathrooms and kitchens, a roofer for top-floor leaks during rain, and an HVAC technician if it is near the air handler. A restoration company handles drying afterward.
Is a leaking ceiling dangerous?
It can be: wet drywall can collapse, and water near wiring is an electrical hazard. Keep people away from a sagging ceiling and turn off power to wet fixtures.
Does homeowners insurance cover a ceiling leak?
Bob Vila notes that sudden events like a burst pipe are more likely to be covered than damage from long-term neglect. Check your policy.
Related problems
Sources
- Bob Vila: Who to call for a water leak in the ceiling
- Bob Vila: Water stains on the ceiling, causes and solutions
- HomeGuide: Water damage restoration cost (2026)
- U.S. EPA: A brief guide to mold, moisture and your home
This guide is general information, not a substitute for an inspection by a licensed professional. See our disclaimer.