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

98% Recommended

16 Years In Business

Company Details

  • Verified Licenses
  • Bilingual


7845 Airpark Road, Suite M
Gaithersburg, MD 20879


  • Mon: 8:00 AM - 5:00 PM
  • Tue: 8:00 AM - 5:00 PM
  • Wed: 8:00 AM - 5:00 PM
  • Thu: 8:00 AM - 5:00 PM
  • Fri: 8:00 AM - 5:00 PM
  • Sat: Closed
  • Sun: Closed
View All Details & Credentials


Service Details

    Areas of Expertise

    • Electrical
    • Commercial and Residential construction
    • Construction consultation and project management
    • Plumbing
    • Tile, paint, hardwood, trim
    View All Offerings and Cities Served

    Cost Information

    • Free Estimates
    • Warranty Offered
    • Trip Charge May Apply


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

    Highly rated for

    • Quality
    • Value
    • Customer Service
    Showing 1-10 of 53 reviews Showing 0 reviews
    5.0 Marvin F. Ellicott City, MD

    People are very nice and honest.. Did the work on time and did a good job. I did not like the thermostat that was installed. We are older and could not read the actual temp because it was such small print. It was also very hard to program. They installed the new one and took the time to show me how to use it, at no extra cost. Very happy with their work.

    5.0 Michael D. Potomac, MD

    Truly professional organization, providing high quality and timely response to our project needs at a very reasonable cost. Will use them again and again.


    Ritzau removed the electric cable for my old stove and helped me to put in the new one. They also did a couple of small jobs while they were here. The whole job took only about an hour and was reasonably priced. I'm very happy with the work they did for me and would definitely call them again.


    Can't really rate the cost--only got one other bid which suggest a different and inferior installation and would have cost a third more. The electricity has gone out twice since the installation and the system worked flawlessly.

    5.0 Richard S. Chevy Chase, MD

    two were more expensive, and two were comparably priced but Ritzau could do it earlier. I was impressed at the quality of the vendors I was sent by Home...

    5.0 Margaret widmayer W. Potomac, MD

    Highly recommend Pat Collins with Ritzau Electric's with the installation of a fixed generator . He gave me the best price, prompt installation handled all permits . we are ready for the next storm


    Very reasonably priced. Electrician installed three overhead lighting/ceiling fans, installed an outlet and ran a telephony line to my living room.

    3.0 Joseph L. Rockville, MD

    The actual work was fine. Unfortunately, we suffered from communications problems. Lets just say they were much better at excuses than at keeping promises.


    I am happy with a generator installation. Pat Collin is nice and knowledgeable. I am now waiting for the inspection. Pat made sure that everything was working after the work was completed and that I was happy with his work. He will come back to hook up natural gas to the grill. Will write another review on how things go. So far so good.

    5.0 Mike C. Bethesda, MD

    Gernot Ritzau gave a prompt and and thorough quote. Handled all permitting. The installation was on time. they cleaned up after themsleves. I would highly recommend them.

    Showing 1-10 of 53 results Showing 0 of 0 results


    Ewell Builders
    before and after
    general electrical
    Bathroom remodel

    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.

    HomeAdvisor verifies state-level licensing where applicable - note: some states require local or county level licensing and you should verify whether or not your pro is properly licensed.
    To find more licensing information for your state, visit our Licensing Requirements page.

    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.