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

Avatar for Groundworks
Groundworks
5.0(
7
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Congress, AZ and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Warranties offered

"Alex and Donavan were very thorough. Discovered more than what we called them for. We originally wanted information on sealing cracks to eliminate cricket infestation coming through cracks in stem wall. We were not interested in repairing foundation rebar which is typical in slab homes in AZ. They were knowledgeable and honest in their evaluation of our home."
Basement Waterproofing
Basement Waterproofing
Basement Waterproofing
Basement Waterproofing
Crawl Space

+22

134 neighbors recently requested a quote
Avatar for City Plumbing & Rooter AZ, LLC
City Plumbing & Rooter AZ, LLC
5.0(
5
)
Basement Drainage Channels - Install

Serving Congress, AZ and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"I had a serious mainline backup at my home in Sedona and reached out to City Plumbing and Rooter—and I’m really glad I did. They showed up exactly at the time we scheduled, which I appreciated right away. They quickly got to work, snaking the line to clear the blockage and then doing a camera inspection to make sure everything was fully cleared and flowing properly. That extra step gave me a lot of confidence that the problem was actually fixed and not just temporarily pushed through. They were professional, knowledgeable, and respectful of my home the entire time. Everything was explained clearly, and there were no surprises. You can tell they know what they’re doing and take pride in their work. If you’re dealing with a mainline backup or any plumbing issue in Sedona, I highly recommend City Plumbing and Rooter. Reliable, on time, and thorough—exactly what you want in a plumber."
Walter - Mascott
Cleanouts w/Backflow
Approval from City
Installing Cleanouts
Septic Fix

+3

30 neighbors recently requested a quote
Avatar for B K Ferguson Plumbing LLC
B K Ferguson Plumbing LLC
5.0(
2
)
Basement Drainage Channels - Install

Serving Congress, AZ and surrounding areas

Emergency services offered

Credit card accepted

"Brett arrived on time and replaced my water heater. He was mindful of my dogs in the area and cleaned up. The hot water heater works great. I would definitely hire him again to do my plumbing work. He is honest and upfront you won’t be disappointed!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

Recommended by100%of homeowners
JRs lawn service and hard scape
New to Angi
Basement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Congress, AZ and surrounding areas

Free estimates

Emergency services offered

Warranties offered

I listen closely to my clients' needs and preferences, offering thoughtful solutions that fit both your vision and budget.\nFrom initial consultation to final touches, I maintain clear and consistent communication, keeping you updated every step of the way.\nDon’t just take my word for it—my clients rave about the professionalism, quality, and care I put into every project.

Front yard Hardscape
Front yard Hardscape
Front yard Hardscape
Front yard Hardscape
Basement Waterproofing questions, answered by experts

Waterproofing or encapsulating protects against moisture, preventing mold growth and structural damage. These services also enhance energy efficiency and improve air quality by keeping humidity levels in check.

The best type of basement ventilation system depends on your budget, the moisture in your basement’s air, and the types of windows you have down there. You should consider all of these factors when choosing a ventilation system. However, the most effective method for basement ventilation is an energy recovery ventilator (ERV) or a whole-house ventilation system, which preheats or precools incoming air from the outside while also managing water vapor.

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.

Yes, crawl spaces can attract bugs, especially since moisture tends to build up in the space, and moisture attracts pests. A good way to prevent pest infestation in your crawl space is to install a vapor barrier—called crawl space encapsulation—on the interior to seal the space, along with a French drain or some other kind of foundation drainage system outside to keep runoff out of your crawl space. You can also seal foundation cracks and repair damages to cut off access to pests.

Yes, you can add a bathroom to an unfinished basement, but you’ll want to take proper precautions if doing so. As with any bathroom addition, you’ll need to make sure that it’s approved by local building authorities first. With unfinished basements, you especially need to keep an eye on proper ventilation practices.

The Congress, AZ homeowners’ guide to basement waterproofing services

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