21st Century Painting and Waterproofing

HomeAdvisor screened and approved seal

HomeAdvisor Screened & Approved

This service professional has passed the HomeAdvisor screening process.

Learn about our screening process
Learn about our screening process

32 Years In Business

Company Details

  • Verified Licenses


PO Box 452766
Los Angeles, CA 90045


  • Mon: Open 24 Hours
  • Tue: Open 24 Hours
  • Wed: Open 24 Hours
  • Thu: Open 24 Hours
  • Fri: Open 24 Hours
  • Sat: Open 24 Hours
  • Sun: Open 24 Hours
View All Details & Credentials


Service Details

  • Residential Work
  • Commercial Work
  • Small Jobs Welcome

Areas of Expertise

  • Foundation and Basement Waterproofing and planters
  • Deck coating and restoration
  • Plaza parking garage caulking
  • Epoxy floors
View All Offerings and Cities Served

Cost Information

  • Free Estimates


23 Verified Reviews
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
Showing 1-10 of 23 results
5.0 Tana V. Carson, CA

They are very neat and clean! I didnâ t have to clean up after them at all! Thatâ s a plus!

5.0 Gary B. La Canada Flintridge, CA

21st Century Waterproofing is the best waterproofing company in the LA area. William Kleeberg knows his stuff and prices his work fairly. Looked all over for a waterproofing company, checked out many companies and found 21st Century Waterproofing to be No. 1

5.0 Maria R. Torrance, CA

I would highly recommend Bill. He correctly water proofed my foundation. He and his crew are true professionals as well.

5.0 Steven B. Santa Monica, CA

Anyone who has waterproofing needs should hire Bill and his team. They are fantastic. I am the President of our HOA ( 5 townhome building) and a resident in one of the 5 units. The building had a number of areas in our underground common area and one resident's garage in particular where water was draining from outside of the foundation of the building. There were no less than 4 separate areas where water was entering the interior of the building. Of all the contractors we interviewed for the job, Bill was the most honest, practical, thoughtful and analytical in his approach to the job. He was more like a surgeon carefully dissecting the problem and then fixing the issues, one a time rather than what most of the other contractors wanted to do, which was tear up the east side of the building and "we'll then see what the problem is." He and his team showed up everyday they said they would - on time. They worked hard and cleaned up their work area every time they were there. He tested his work (flooding areas and letting the water sit for 48+ hours) to make sure he had done the job right and completely. He explained what he was going to do and then he did it. I highly, highly recommend 21st Century Waterproofing. One of the best contractors I have ever hired - for ANY JOB - in my 30+ years of managing properties.

5.0 Megan W. Los Angeles, CA

Bill and his crew were extremely professional and helped assess the issue and fix my waterproofing problems quickly. Highly recommend.

5.0 Jason S. Santa Monica, CA

Responsibility, timing and good service.

5.0 Tom C. Santa Monica, CA

Good people excellent work fair prices e

5.0 James T. Santa Monica, CA

no comment provided

5.0 Robert C. Los Angeles, CA

Good communication, timely, problem solvers.


21st Century Painting and Waterproofing
Our Work

HomeAdvisor allows Service Professionals to post information about themselves and their business on their profile. HomeAdvisor does not review or verify the information representations set forth in those profiles as they are self-reported by the Service Professional.

To find more licensing information for your state, visit our Licensing Requirements page. Note that some states require local or county level licensing and you should verify whether or not your pro is properly licensed.

Seal of Approval

What is the screening process that Service Professionals go through in order to become members of the HomeAdvisor network?

  1. Verify Trade License
    HomeAdvisor checks to see if the business carries the appropriate state-level license.
  2. Verify Insurance
    As a part of our screening process, we encourage professionals to carry general liability insurance. We require coverage for hundreds of services.
  3. Verification of State Business Filings
    For business types that require a Secretary of State filing, we confirm that the business is in good standing in the state in which it is located.
  4. Criminal Records Search
    HomeAdvisor uses 3rd party data sources to conduct a criminal search for any relevant criminal activity associated with the owner/principal of the business.
  5. Sex Offender Search
    We confirm that the owner/principal is not listed on the official state Sex Offender web site in the state in which the owner/principal of the company is located.
  6. Bankruptcy Search
    We use 3rd party data sources to check the history of the principal/owner of the business for bankruptcy filings by or against them.
  7. Legal Search for Civil Judgments
    We use 3rd party data sources to check the principal/owner of the business for state level civil legal judgments entered against them.
  8. Liens Search
    We use 3rd party data sources to check the principal/owner of the business for liens placed against them.
  9. Identity Verification (SSN)
    HomeAdvisor verifies the social security number(s) of the owner/principal for identity check purposes. This check applies primarily to smaller business entities.
  10. Identity Verification (Reverse Phone Lookup)
    We conduct a reverse business phone lookup to identify records matching the phone number information provided by the business.

NOTE: Member service professional information confirmed as described above may change or expire over time; while HomeAdvisor attempts to maintain accurate and up-to-date information, and confirms changes when notified, we cannot guarantee that profile and screening information is accurate. Therefore, we recommend that before working with a service professional you verify that information presented is still current and/or acceptable to you.
Please see HomeAdvisor's Terms and Conditions for a full description of how we screen Service Professionals

**Only for U.S. service professionals

Final Step - Confirm Your Appointment:

Confirm your appointment with on , - Change


By clicking Confirm Appointment, you affirm you have read and agree to the HomeAdvisor Terms & Conditions, and you agree and authorize HomeAdvisor and its affiliates, and their networks of Service Professionals, to deliver marketing calls or texts using automated technology to the number you provided above regarding your project and other home services offers. Consent is not a condition of purchase.