Water damage drying
Fire & smoke cleanup
Mold remediation
Storm response
Sewage cleanup
ReconstructionFree visual inspection and a written scope of work before any mitigation begins - photos, moisture readings, and drying logs go in your claim file
The scope we write is the scope we bill. Anything new gets shown to you, in writing, before we touch it.
Get your free estimateRestoration Company in Ontario, CA
We’re Tidemark Water Damage Restoration, an independently owned and operated restoration company serving Ontario, CA. Ontario’s mix of mid-century homes with original plumbing, newer tract developments on slab foundations, and the Santa Ana wind season means damage here rarely looks like damage in neighboring cities. Water travels differently through 1950s galvanized pipes than through modern PEX. Soot from wind-driven wildfire particulates settles into homes near the 60 freeway and northern foothills in ways that surprise homeowners. If you’re dealing with water, mold, or fire damage in Ontario, call (341) 212-7342 and a real person answers, day or night.
Why Ontario Homes Are Different
Ontario sits in a part of the Inland Empire where the housing stock spans two very different generations of construction. The older neighborhoods, many built between the 1940s and 1970s, often have galvanized steel supply lines that corrode from the inside out over decades. When one fails, it’s rarely a dramatic burst. It’s a slow, steady leak inside a wall cavity or under a slab, and by the time water shows up on the floor, it has been traveling for days. That hidden tide mark is the first thing our technicians look for on every job.
Newer construction brings its own challenges. Slab foundations are common in Ontario’s tract developments, and when a supply line leaks beneath the slab, water has no obvious path to drain. It pools, wicks upward through the concrete, and creates moisture conditions that flooring and baseboards don’t reveal until the damage is already significant. Ontario’s hot, dry summers compound this: soil contracts away from foundation edges, and the cycle of expansion and contraction during occasional heavy winter rains stresses underground lines further.
Then there’s the wind. During Santa Ana season, restoration work in Ontario shifts. Homes near the northern foothills and along the 60 freeway corridor get smoke, ash, and fine soot driven into attics, window tracks, and HVAC returns even when fires are miles away. It’s a cleanup job that requires specific equipment and a different approach than fire damage from a kitchen incident or electrical failure.
Restoration work we handle
Our Main Ontario Services
Most Ontario homeowners call us for one of three problems: water that appeared where it shouldn’t, mold that followed moisture, or smoke and soot that settled in after a fire or a Santa Ana wind event. Each service has its own dedicated page for Ontario, written for the way these jobs actually unfold in this city.
Water Damage Restoration in Ontario
In Ontario, water damage often traces back to corroded galvanized lines in older homes or slab leaks in newer ones. Both require finding exactly where the water traveled, not just where it pooled. We use professional-grade drying equipment from Dri-Eaz, Phoenix, XPOWER, and Injectidry to dry past the visible tide mark, which matters when moisture has been moving through a wall cavity for days or weeks. Shoe covers go on at the door and drop cloths cover the floor before any equipment comes in. Water Damage Restoration in Ontario covers the full process, including drying timelines and what we check inside walls.
Mold Remediation in Ontario
Mold in Ontario follows the same patterns as water: crawlspace humidity in older homes, trapped moisture behind baseboards after slab leaks, and bathroom exhaust issues in tighter newer construction. The job is not just killing what’s visible. It’s finding the moisture source, setting containment so spores don’t spread through the HVAC system, and removing affected material. We use pet-safe products where there is a choice and share a photo of the clean-up before the crew leaves. Mold Remediation in Ontario details how we handle containment, air scrubbing, and source removal for this city’s housing types.
Fire Damage Restoration in Ontario
Two kinds of fire damage reach Ontario homes: the direct kind, from kitchen fires, electrical failures, or garage incidents, and the indirect kind, from Santa Ana winds carrying wildfire smoke and soot for miles. Both leave residues that require different cleaning approaches. Soot from a protein fire behaves differently than wind-driven ash, and neither responds well to household cleaners. Fire Damage Restoration in Ontario explains the cleaning methods, odor treatment, and what can be restored versus what should be replaced.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Ontario
Our Ontario crews work on equipment from the major restoration brands: Dri-Eaz, Phoenix, B-Air, and Injectidry. Parts and consumables for these systems are stocked locally, which keeps turnaround tight when a job needs a specific fan, filter, or injector mid-project. See our brands for the full list of equipment we operate and maintain.
See the difference
Before
After
Before
After
Before
AfterPricing for Restoration Company in Ontario, CA
These are the ranges we typically see for restoration work in Ontario. Every job receives a written price before any work starts, so the number you see on the estimate is the number on the final invoice.
| Service | Typical range in Ontario |
|---|---|
| Water extraction and drying (single room) | $1,200 – $3,500 |
| Slab leak water damage repair | $3,500 – $8,000 |
| Whole-home water mitigation | $6,000 – $15,000 |
| Mold inspection and testing | $300 – $700 |
| Mold remediation (contained area) | $1,500 – $5,000 |
| Mold remediation (crawlspace or attic) | $4,000 – $10,000 |
| Smoke and soot cleanup after kitchen fire | $2,500 – $7,000 |
| Santa Ana wind soot and ash cleanup | $1,500 – $5,000 |
| Odor treatment and air scrubbing | $800 – $2,500 |
What pushes a Ontario job toward the upper end of these ranges is usually access. Crawlspaces under older homes are tight, slab leaks can require cutting through flooring and concrete, and Santa Ana soot that has entered the HVAC system means cleaning ductwork as well as surfaces. Regardless of where a job lands, you get the written number before anything starts.
Neighborhoods We Serve in Ontario
We run restoration crews across Ontario, from the older grid neighborhoods near downtown to the newer developments pushing north and east. Response time for the Ontario area is typically within 60 to 90 minutes for water emergencies.
- Downtown Ontario and the historic Euclid Avenue corridor
- Neighborhoods near the 60 freeway and Mission Boulevard
- Areas around Ontario Ranch and the newer southern tracts
- Communities near Chaffey High School and the civic center
- Northern neighborhoods bordering Rancho Cucamonga and the foothills
Service Area – Cities Near Ontario
If you’re just outside Ontario, we also serve the surrounding communities. Our crews cover Montclair, CA, Claremont, CA, Upland, CA, and Rancho Cucamonga, CA with the same written-price-first approach. Dispatch and scheduling are coordinated from our Inland Empire office, so a crew can reach Ontario neighborhoods and the bordering cities without delay.
Serving Ontario, CA - Our Local Coverage Area
We’re based in the Ontario area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Restoration Company in Ontario
For water emergencies in Ontario, our standard response window is 60 to 90 minutes. The call goes to a live person, not a voicemail, and we dispatch a local crew immediately. Faster response means less water migration through walls and flooring, which keeps the scope of work smaller and the drying timeline shorter.
Most water mitigation and mold remediation work in Ontario does not require a permit because it’s considered repair, not new construction. Structural changes, like cutting into a slab for pipe replacement, may trigger permit requirements. We’ll tell you early in the process if a permit applies, and we handle the paperwork as part of the written scope.
Many Ontario neighborhoods have HOAs, especially the newer tract developments. Interior restoration work typically doesn’t require HOA approval, but anything visible from the outside, like equipment placement or a dumpster for removed materials, may need a quick sign-off. We’re used to working with Ontario HOAs and can provide whatever documentation they request before the crew arrives.
If you’re dealing with water, mold, or fire damage in Ontario, call (341) 212-7342. You’ll get a written price before any work begins, and the 365-Day Done Right Promise means we stand behind the job long after the crew has left.
What happens when you call
- 1A real person answersNo phone trees - talk to a local damage restoration pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Ontario Customers Say
"Flooded laundry room. They set up fans but were thoughtful about the noise around the baby's room and moved equipment when I asked. Kind, clean, and they checked in daily."
- Marcus Delacroix"Water heater flooded the garage and part of the hall. The crew treated our home gently, laid protection everywhere, and were kind about how overwhelmed I was. Dried it out properly."
- Daniela Ross"Dishwasher leaked under the floor for a while. They found the hidden moisture, dried it without tearing up more than they had to, and left the kitchen clean and treated. Gentle with the whole process."
- Gary Linden