Top-rated basement waterproofing pros.

Best basement waterproofing pros near Los Osos, CA

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Top-Rated Basement waterproofing pros in Los Osos - Updated Nov 2026

Avatar for L Jones Earthworks
L Jones Earthworks
New to Angi
Basement Drainage Channels - Install

Serving Los Osos, CA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

L Jones Earthworks is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests and make their concerns the basis of our business.

Response time5 hrs
Response rate92%
SM Plumbing And Handyman services
4.5(
10
)
Basement Drainage Channels - Install

Serving Los Osos, CA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"Angel was responsive to my inquiry by email. Came out for an estimate to install stock cabinets, counter top and sink as well as all the plumbing. The day he was scheduled to come to install he called me to explain he had made a mistake on his estimate and wanted to talk with me first because he said he would not just come to do the work then tell me, this was for $20.00! that impressed me a lot. He was so careful of my home protecting the area he worked in he did a quality job! He was efficient an organized."
Recommended by77%of homeowners
Avatar for Elite Rooter
Elite Rooter
4.5(
11
)
Basement Drainage Channels - Install

Serving Los Osos, CA and surrounding areas

In business since 2011

Free estimates

Emergency services offered

"This was a 5day job Eric Zavala was my technician Mr Zavala was very respectful, very professional and very aware of safety Covid Protocol. I would definitely highly recommend Elite Rooter as well as Eric Zavala Thank you so much Eric and Elite Plumbing."
Drain Unclogging
Drain Unclogging
Drain Unclogging
Drain Unclogging
Drain Unclogging

+22

Recommended by90%of homeowners
Avatar for RE Construction LLC
RE Construction LLC
5.0(
2
)
Basement Drainage Channels - Install

Serving Los Osos, CA and surrounding areas

In business since 2025

Free estimates

Small jobs welcome

"I hired RE Construction to grade a sloped driveway. Robert made the process easy and turned my idea into a reality. I can’t say enough about his professionalism and attention to detail. I’d recommend RE to anyone and will use their services again in the future."
Residential backyard
Residential backyard - mid project progress
Residential backyard - mid project progress
Response time7 hrs
Response rate100%
Avatar for Madruga Construction
Madruga Construction
5.0(
1
)
Basement Drainage Channels - Install

Serving Los Osos, CA and surrounding areas

In business since 2006

Free estimates

Credit card accepted

"Ed Madruga came out promptly, and was very helpful, knowledgeable, and forthright. He was so helpful, I may end up doing the project myself. If not, he will likely get the job. Later, I came to my senses and had him do the job. He had the right equipment and knew exactly what to do. Got it all done in less time than expected, and charged less than quoted. I highly recommend Madruga Construction."
Response time8 hrs
Avatar for King's Excavation & Construction
King's Excavation & Construction
New to Angi
Basement Drainage Channels - Install

Serving Los Osos, CA and surrounding areas

In business since 2021

Free estimates

Kings Excavation is your premier choice for excavation and plumbing services in the Bay Area. With a strong emphasis on quality work and competitive pricing, we have earned a reputation for excellence.\n\nOur experienced team specializes in a wide range of services, including site preparation, trenching, septic system install, sewer line repair, and installation. We handle residential and commercial projects with precision and efficiency.\n\nWhat sets us apart is our commitment to customer satisfaction. We prioritize clear communication, timely delivery, and superior workmanship. Our clients trust us to deliver results that exceed expectations.\n\nChoose Kings Excavation for reliable service, competitive rates, and exceptional outcomes. Contact us today for all your excavation and plumbing needs.

Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+8

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Basement Waterproofing FAQs, answered by experts

If a crawl space isn’t vented, there can be moisture buildup, which can lead to mold damage, easily destroying the foundation of your home. A closed-off crawl space can trap heat, which can be useful in the winter, but can also trap dangerous gases and prevent clean air from entering the home through the floorboards.

While it’s possible to seal a foundation yourself, it’s not recommended, as it’s a tricky and labor-intensive job. Foundation sealing is best left to the pros to save yourself time, remove the risk of doing it wrong, and keeping yourself safe. Call a foundation repair professional near you to see what the job will cost.

Yes, you can finish a basement that leaks, as long as you address the leak first. Before finishing a basement, you’ll need to repair any cracks in the walls and waterproof the basement to prevent future leaks. It’s much harder to clean up a water leak from a finished basement than an unfinished one, so preemptively addressing any leaking areas prevents expensive repairs in the future.

The first step to preventing foundation cracks is to repair any current ones. When one crack forms, it becomes more likely that a second crack will follow. A few other tips include performing regular foundation checks, cleaning spouts and gutters, and installing exterior drains if needed. For those living in a hot and arid area, you should water your foundation every other day.

Yes, cleaning a crawl space is worth the cost. Although it's an out-of-sight area, neglecting it can lead to significant problems like pest infestations (including termites and carpenter ants), mold, and fungal growth, which can cause structural damage. Regular cleaning helps prevent these issues. While hiring a contractor has ongoing costs, the price for cleaning—typically between $0.50 and $4 per square foot—is much lower than the cost to remediate a pest or mold problem. Additionally, a clean crawl space can lead to improved indoor air quality and more comfortable temperatures in your home.

The Los Osos, CA homeowners’ guide to basement waterproofing services

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