Leak reappears in a different place each storm
The membrane is at the end of its life rather than punctured in one spot. Patching keeps working and keeps moving, which is the signal to price a recover or a replacement.
Building FabricPriced as an emergency callout5,167 businesses licensed for it
Roof leak repair
A roof leak in a commercial unit is rarely where the water lands, because flat and low-slope roofs move water sideways along the deck before it finds a seam. Work covers tracing the entry point, patching and resealing membranes, flashing and penetration repairs around rooftop units and vents, drain and scupper clearing, and reroofing where patching has run out of road. The most useful thing you can do is photograph where the water appears and when.
Enter your ZIP to see the businesses listed for this trade nearest to your site, with their phone numbers.
- Free to searchno account, nothing to submit
- Public registersevery listing names its source
- License numberswhere the state publishes one
- Directyou call the business yourself
- Our estimate
- $350-$15,000
- Time on site
- 2-24 hrs
- Fault patterns covered
- 2
- Licensed for this trade itself
- 5,167
What roof leak repair costs
Most of these jobs land near $900. The full spread runs $350 to $15,000, and the gap between those two ends is diagnosis against replacement rather than one business being dearer than another.
What moves it: how much of the job is parts, whether the fault is found in the first hour or the third, access to the equipment, and the hour of the day you call. We never speak to the businesses listed here, so there is no rate card behind any of this. It is our own band for the category, and there is no regional index: the figure does not change with your metro.
| How soon you need it | Typical | Range |
|---|---|---|
| Scheduled visitBooked in advance, no urgency multiplier applied | $900 | $350 to $15,000 |
| Same dayOur band multiplied by 1.12 | $1,010 | $390 to $16,800 |
| Emergency calloutOur band multiplied by 1.35 | $1,215 | $475 to $20,250 |
Our estimate from national cost bands, not a quote from any business. Every row is the same band with the urgency multiplier the site applies everywhere else, so this table can never contradict the headline number. Ask for a written price before the work starts.
Who is licensed to do this work
In California the classification that squarely covers this is C-39 roofing, and the register says who holds it. Every listing on this site shows the classification, the license number and the date we read it, with a link back to the register entry so you can check it against the state rather than against us.
Overlapping classifications exist and are labeled as overlapping rather than as a match: B general building. A general building contractor may hold the job and subcontract the trade, which is a real answer and a different one, so the card says which of the two you are looking at.
One thing worth being plain about: CSLB classifications do not distinguish commercial work from residential. There is no separate commercial license to hold and no register field that would prove one. That is why this page describes the equipment rather than the contractor, and why nothing here says a business has been checked out. We read a public record on a stated date. That is the whole claim.
If it is down right now
Everything below is about our mechanism. We hold no hours for any business on this site, have never contacted one, and cannot tell you who is awake, so none of this is a promise that somebody answers.
- Enter the ZIP of your premises. We measure from that ZIP to the address each business filed with its licensing authority and keep everything inside 25 miles.
- The order is distance, nearest first. Nobody buys a position in it and there is nothing here to sell.
- If fewer than three businesses clear the filters, the ring steps out toward 75 miles and the page tells you it widened. The distances you then see are the real ones.
- Each listing carries the phone number the register publishes. You call it yourself. We have no phone line, take no fee and pass nothing on.
- Our band for an emergency callout is the category band multiplied by 1.35. That multiplier is ours and describes our estimate, not a rate anybody has quoted.
Before you pay for a callout
Two minutes of checks that sometimes end the problem
We would rather you did not need a callout at all. These are the checks that end the most calls for this fault.
Try a quick fix first
Some issues resolve without a truck roll. Two minutes now can save the callout.
- 1
Photograph where the water appears and note the weather at the time. Wind-driven rain and steady rain leak from different places, and that detail genuinely narrows the search on a flat roof.
- 2
Move stock and put down containment before anyone arrives. The roof repair is usually the smaller half of the bill.
- 3
Check the roof drains and scuppers if it is safe to. A blocked drain turns an ordinary storm into standing water, and standing water finds every seam.
- 4
Ask the landlord first in a leased unit. Roofs are the landlord's responsibility under most commercial leases and paying for their roof is a common and avoidable mistake.
What the visit actually includes
- Leak tracing from inside and on the roof
- Temporary containment where the weather demands it
- Membrane, seam, flashing or penetration repair
- Drain and scupper clearing
- Photographs of the repair and a note of the remaining life
Diagnosis
How roof leak faults usually present
Written from how these faults actually present on a working premises, not from a manual.
Water only after rooftop equipment runs
Condensate from an air conditioning unit, not the roof. Cheap to fix, frequently misdiagnosed, and it is worth ruling out before anyone quotes a roof.
Listed for this trade
Businesses listed for roof leak
Read from public license registers, so there is no ranking here and no distance: this page has no location to measure from. Enter your ZIP to sort by who is nearest to your site.
By location
Roof leak repair near you
Local pages show which businesses are listed for that metro, how far out they sit, and the local conditions that drive demand.
Counted from the businesses we have imported for each metro center inside a 25 mile radius, and counting only those whose own license classification names this trade. General contractors licensed widely enough to take it on and subcontract it are excluded here, and still appear in a search. A metro reads “none yet” until we load a register that covers this trade there.
All coverage areasQuestions owners ask
Roof leak FAQs
Short, specific answers. If yours is not here, ask the business you call before you agree to the visit.
Is this my responsibility or the landlord's?
In most commercial leases the roof structure and membrane are the landlord's and your own stock and fit-out are yours. Report it in writing the day it happens, because the paper trail is what decides the argument later.
Can a roof be repaired in the rain?
Temporary containment yes, a permanent repair generally no, because membranes and sealants need a dry surface. A good contractor will say that rather than take your money twice.
What license does this need?
C-39 roofing in California. A B General Building contractor also legitimately performs roofing work, which is why both appear against this service, with the specific classification shown first.
Related work
Often booked in the same visit
Batching jobs into one mobilization is the cheapest way to buy this kind of work.
Commercial doors and locksDoors that will not close, failed closers, automatic doors, locks, keys and panic bars.from $180Storefront glassBroken shopfronts, cracked panes, failed seals and emergency boarding up.from $260FlooringLifting tiles, trip hazards, water-damaged floors and slip-resistant kitchen surfaces.from $300DrywallHoles, water-stained ceilings, damaged partitions and fire-rated wall reinstatement.from $250
Building Fabric
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Ready when you are
Need roof leak sorted?
Search your ZIP to see the businesses listed for this trade nearest to your site, with the license numbers and phone numbers we hold, then call them yourself.
- Cost to search
- Free
- Account needed
- None
- Who you call
- The business