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Verified Reviews for Basement Waterproofing pros in Penryn, CA

*The Angi rating for Basement Waterproofing companies in Penryn, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Penryn, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on January 20, 2026

Find Basement waterproofing pros in Penryn

Avatar for Bonney Plumbing Heating Air & Rooter Service
Bonney Plumbing Heating Air & Rooter Service
4.0(
296
)

Serving Penryn, CA and surrounding areas

Approved (Corporate)

In business since 1978

Emergency services offered

Warranties offered

"They were very professional, they did a a quick job and they go above and beyond."
Our team at Bonney helped restore flow at this Sacramento home by performing a sewer spot repair on the main line for our customer. This involved locating the problem area, digging the trench, snaking the line to clear the drain, repairing a section of the sewer pipe, and then backfilling the space to restore back to the original landscape.
Completed Install of Rinnai RU199e Tankless Water heater
Finished Project - Installation of new free standing Tesla Electric Vehicle (EV) charger for our customer in Davis
Before Picture showing the area where our customer in Citrus Heights wanted us to install the new water heater
Before picture of landscape

+18

31 neighbors recently requested a quote
Recommended by71%of homeowners
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Avatar for Groundworks
Groundworks
5.0(
1
)

Serving Penryn, CA and surrounding areas

Approved (Corporate)

In business since 1990

Free estimates

Warranties offered

Groundworks is the North America?s leading and fastest-growing foundation repair and water management solutions provider. Groundworks is a vertically integrated company with its own manufacturing operations and a world-class software solution, allowing us to serve our customers more effectively. From the first phone call to the annual maintenance offered, our customers have peace of mind knowing we?re there with one mission ? to repair, protect and improve their home. For state licenses visit Groundworks.com/licensing\n

Basement
Basement
Basement
Basement
Concrete

+16

120 neighbors recently requested a quote
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RSF Construction Inc.
1.0(
1
)

Serving Penryn, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

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Avatar for Dependable Rooter and Plumbing
Dependable Rooter and Plumbing
4.6(
193
)

Serving Penryn, CA and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Perfect! No problems or issues that need immediate attention. Pedro, the technician, left me with a couple of "preventive maintenance" items to consider. No high pressure sales. He was professional, efficient and communicated with me what he was doing, what he was finding, and what to consider to maintain a healthy and happy home!"
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+97

Recommended by89%of homeowners
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US Trenchless
4.9(
8
)

Serving Penryn, 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
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Basement Waterproofing questions, answered by experts

Encapsulation can take the place of crawl space vents since it protects the area from moisture and air all year round. Determining whether you should open or close crawl space vents can be complicated since it often depends on the weather and humidity. Skip this step by investing in crawl space encapsulation whenever possible.

The purpose of soffits is to circulate air, so a blocked soffit means the air in your attic becomes stagnant. This can lead to a number of problems, mostly moisture-related, that can cause damage to your health and your home. The good news is that unclogging soffits is relatively straightforward, and if your attic is easy to access, an easy DIY project.

If you set up a dehumidifier, it will usually dry out your wet crawl space within 12 to 24 hours. Once the space is dry, it’s a good idea to take preventative measures to keep it dry. These include installing a French drain or other exterior foundation drainage system, installing a sump pump in the crawl space, and installing a vapor barrier in addition to leaving the dehumidifier running.

Make sure you're calling in the right expert to help repair and/or clean your crawl space. A serious issue may require multiple experts that include a local mold remediation pro, an HVAC pro, a foundation pro, and a plumber. You should also consider using a nearby junk removal service to avoid handling debris that could be covered in mold, fungi, rot, or asbestos.

Whether to waterproof your basement from the interior or exterior depends on several factors, including your budget.

Exterior waterproofing is generally considered the superior method because it stops water at the source, preventing it from seeping into and damaging your basement walls. This approach offers the most protection, making it ideal if you use your basement for storage.

By contrast, interior waterproofing is often less expensive and requires less labor because the area is more accessible.

For maximum protection against water leakage and moisture, applying waterproofing measures to both the inside and outside is the best solution. However, if you must choose only one, stopping water from the outside is the most effective approach to preserve your foundation and prevent damage.

The Penryn, CA homeowners’ guide to basement waterproofing services

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

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