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Best basement waterproofing pros near Dunnigan, CA

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Top-Rated Basement waterproofing pros in Dunnigan - Updated Nov 2026

Avatar for Groundworks
Groundworks
4.6(
19
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Dunnigan, CA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"Groundwork’s did a great job on our house. Luis G was an amazing Forman with Ken H and Mark P all waterproofed under our house. They worked quickly, efficiently and thoroughly left all areas in tact and clean. Luis communicated very clearly about the all aspects of the job until it was completed."
Basement
Basement
Basement
Basement
Foundation

+16

161 neighbors recently requested a quote
Recommended by58%of homeowners
US Trenchless
4.9(
8
)
Basement Drainage Channels - Install

Serving Dunnigan, CA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"US Trench less was referred to me through a friend. I called US Trench less and explained the situation I had in my backyard. US Trench less came out the next day and ran the diagnostic TV scope where we were able to see how bad of shape my pipes were in. US Trench less was able to come out and start working the very next day. The entire job was done in less than 4 days which was amazing considering how quickly they began working. US Trench less was honest, very trustworthy, knowledgeable, and prompt with my situation. I would highly recommend their work!"
Recommended by100%of homeowners
Avatar for G R Dahl Construction
G R Dahl Construction
4.8(
9
)
Basement Drainage Channels - Install

Serving Dunnigan, CA and surrounding areas

In business since 1990

Free estimates

Emergency services offered

"Greg was a pleasure to work with. Our back splash went all the way up to the ceiling and around bay windows. It was a big job. He also helped me come up with a solution to frame my kitchen windows since the sill had already been cut from the slab and installed by a previous contractor. My cousin who is a retired contractor came over and said Greg’s work was impeccable. Highly recommend!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+81

Recommended by100%of homeowners
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Basement Waterproofing FAQs, answered by experts

Proper drainage is the only way to ensure that your crawl space stays dry. Depending on your property and the extent of your issue, you might need to consider a gutter system, a French drain, or sump pumps to avoid and handle water and moisture under your home. Dehumidifiers can also help to prevent moisture from accumulating if you have a high-humidity environment.

There are a few downsides to a wet room, the most important of which is the risk of mold growth from the moisture and humidity. Standard bathrooms can have the same issue, but wet rooms are more likely to experience problems because water is less carefully contained. You also have less privacy since the entire bathroom is open, and the room must include waterproofing, which makes wet rooms more expensive to install than regular bathrooms.

Ideal humidity conditions generally range from 30% to 50%, with 45% considered optimal humidity for most homes. If your humidity levels drop below that range, you can turn your dehumidifier off. Additionally, suppose the temperature where the dehumidifier is installed falls below 60 degrees Fahrenheit. In that case, it's best to turn it off and unplug it since cooler temperatures can cause the unit's coils to freeze.

No, you don’t want your crawl space to be wet because water and even moisture in the air under your home can attract insects and rodents, decrease your indoor air quality, increase your energy bills, promote mold growth, and even lead to structural damage. If you notice any signs of water or humidity in your crawl space, you should get the issues addressed immediately by contacting a professional. They can remove moisture and will know how to waterproof your basement to prevent ongoing problems.

The cost of basement waterproofing is $4,950 for the average homeowner. However, you could end up paying between $600 and $14,000, depending on factors like basement size, waterproofing method, and the region you live in. 

If you live in an area with heavy rainfall, you might be paying more for waterproofing than if you lived somewhere drier since waterproofing contractors would be in high demand. Likewise, a 500-foot basement costs between $2,500 and $5,000 to waterproof, but that price rises significantly for a larger basement.

The Dunnigan, CA homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.