403 Headquarters Dr. Unit 5
Millersville, MD 21108
(443) 396-3797

Local Reviews

Rated 4.9 out of 5 stars based on 892 customer reviews

Electrical service

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Quick and Efficient Service

I called on a Friday, Monday they did the assessment and the work was completed the following Friday as scheduled/agreed. The electricians were very efficient and friendly, offering advice when and where asked. Nick and Ian were great, would recommend.

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Knowledgeable electricians with old school work ethics!

Nick did a fantastic job replacing our old recessed lights with new LED lights. He explained all of my options and made sure I was happy with my choices. He was prompt, professional and very friendly. I felt very comfortable with him and had total confidence in his ability. Ian joined him today to finish the job. He was also excellent. Both men worked very patiently and took pride in a job well done. They both commented that they wanted to make sure I was totally satisfied and happy with the final product. I was thrilled. I will be a Haas and Sons customer for life.

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Professional service

Michael is a real professional! Excellent communication, friendly, knowledgeable, and addressed all of my electrical needs.

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Professional, friendly service!!!

I highly recommend Haas and Sons for any electrical work. They were recommended to me by a friend, and I’m glad I gave them a call. I had a big job done: they replaced all the plugs and switches, electrical panel, mast on the roof, and replaced a few lights in the basement and in addition installed a dining room light for free. I have a really cluttered house and they had to move a lot of junk and heavy furniture to find and replace the plugs, but they were very good natured about it. The crew worked very hard and got the job done quicker than I expected. They were all very professional and pleasant, and I feel confident in their work. I will not hesitate to hire them again in the future.

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Excellent service!

As usual, excellent knowledge and problem-solving skills!

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Professional service

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Excellent Service!

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Excellent Service

Nick was informative and professional

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Great service

Yes, I was very satisfied with the service on yesterday. Nick did a phenomenal job with servicing the electrical problem and sharing knowledgeable information for future references. I definitely would use the service again.

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Excellent Service!

Extremely professional, knowledgeable, and fixed the problem in no time at all!

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Excellent service very professional

Mike arrived on time and was very professional, explained how work would be done and was very informative about types of install.

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Great Service -

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Excellent service.

Dennis succeeded in promptly troubleshooting and identifying the cause of our electrical issue. He then repaired the faulty outlet, while explaining why it occurred.

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Job Locations

Nicholas T.

Nicholas T. Job Checkin

Help customer replace lightbulb and hood fan


Nicholas T.

Nicholas T. Job Checkin

Troubleshot lights not working to find a trip GFCI in the sink area/vanity area of the master bathroom. We reset GFCI and all the lights turned back on. Issue was due to a large space heater being plugged into the back outlet.

Troubleshot lights not working to find a trip GFCI in the sink area/vanity area of the master bathroom. We reset GFCI and all the lights turned back on. Issue was due to a large space heater being plugged into the back outlet.

Nicholas T.

Nicholas T. Job Checkin

Replace front light on porch.

Replace front light on porch.

Nicholas T.

Nicholas T. Job Checkin

Provider pricing install proper size boxes for smart switches in the upstairs bedrooms as well as to correct missing grounding on two receptacles in the second floor back bedroom. We’re also providing pricing to replace standard receptacles in the garage with GFCI receptacles.

Provider pricing install proper size boxes for smart switches in the upstairs bedrooms as well as to correct missing grounding on two receptacles in the second floor back bedroom. We’re also providing pricing to replace standard receptacles in the garage with GFCI receptacles. Provider pricing install proper size boxes for smart switches in the upstairs bedrooms as well as to correct missing grounding on two receptacles in the second floor back bedroom. We’re also providing pricing to replace standard receptacles in the garage with GFCI receptacles.

Nicholas T.

Nicholas T. Job Checkin

Replace CH 40 space panel with a QO 40 space panel. Install brand new QO breakers correctly sized for circuits and to account for any multiwire branch circuits. Update the grounding system with installation of 8 foot ground rods outside the home, and bond the water heater with a #4 ground wire between the hot, cold, pipe. Install an emergency disconnect in accordance with county safety standards. Install a QO plug-on surge to meet county safety standards. Haas and Sons will coordinate with county inspectors and BGE throughout the entire process. Install a customer supplied level 2 EV car charger next to panel with a load management system.


Replace CH 40 space panel with a QO 40 space panel. Install brand new QO breakers correctly sized for circuits and to account for any multiwire branch circuits. Update the grounding system with installation of 8 foot ground rods outside the home, and bond the water heater with a #4 ground wire between the hot, cold, pipe. Install an emergency disconnect in accordance with county safety standards. Install a QO plug-on surge to meet county safety standards. Haas and Sons will coordinate with county inspectors and BGE throughout the entire process. 

Install a customer supplied level 2 EV car charger next to panel with a load management system. 
Replace CH 40 space panel with a QO 40 space panel. Install brand new QO breakers correctly sized for circuits and to account for any multiwire branch circuits. Update the grounding system with installation of 8 foot ground rods outside the home, and bond the water heater with a #4 ground wire between the hot, cold, pipe. Install an emergency disconnect in accordance with county safety standards. Install a QO plug-on surge to meet county safety standards. Haas and Sons will coordinate with county inspectors and BGE throughout the entire process. 

Install a customer supplied level 2 EV car charger next to panel with a load management system.

Nicholas T.

Nicholas T. Job Checkin

Replace GE Slimline Panel with QO 40 space panel. Install brand new QO breakers correctly sized for circuits and to account for any multiwire branch circuits. Update the grounding system with installation of 8 foot ground rods outside the home, run a bonding wire to the main water shutoff, and bond the water heater with a #4 ground wire between the hot & cold pipes. Install an emergency disconnect in accordance with county safety standards. Install a PSP Vortexx surge with a lifetime warranty and $100,000 of combined protection to meet county safety standards. Haas and Sons will coordinate with county inspectors and BGE throughout the entire process. Replace all switches, plugs, and other devices within the home with the proper terminations. Install GFCI protection where required throughout home.


Replace GE Slimline Panel with QO 40 space panel. Install brand new QO breakers correctly sized for circuits and to account for any multiwire branch circuits. Update the grounding system with installation of 8 foot ground rods outside the home, run a bonding wire to the main water shutoff, and bond the water heater with a #4 ground wire between the hot & cold pipes. Install an emergency disconnect in accordance with county safety standards. Install a PSP Vortexx surge with a lifetime warranty and $100,000 of combined protection to meet county safety standards. Haas and Sons will coordinate with county inspectors and BGE throughout the entire process. 

Replace all switches, plugs, and other devices within the home with the proper terminations. Install GFCI protection where required throughout home. 
Replace GE Slimline Panel with QO 40 space panel. Install brand new QO breakers correctly sized for circuits and to account for any multiwire branch circuits. Update the grounding system with installation of 8 foot ground rods outside the home, run a bonding wire to the main water shutoff, and bond the water heater with a #4 ground wire between the hot & cold pipes. Install an emergency disconnect in accordance with county safety standards. Install a PSP Vortexx surge with a lifetime warranty and $100,000 of combined protection to meet county safety standards. Haas and Sons will coordinate with county inspectors and BGE throughout the entire process. 

Replace all switches, plugs, and other devices within the home with the proper terminations. Install GFCI protection where required throughout home.

Michael W.

Michael W. Job Checkin

We have delivered pricing for the receptacle replacements for the bedroom.

We have delivered pricing for the receptacle replacements for the bedroom. We have delivered pricing for the receptacle replacements for the bedroom.

Michael W.

Michael W. Job Checkin

This solution includes the installation of a new combo detector near front door. We have replaced the combo detector near the front door. We recommend replacing all remaining older smoke detectors in the bedrooms. Customer is considering moving forward with the prevent solution within 2 weeks.

This solution includes the installation of a new combo detector near front door.
We have replaced the combo detector near the front door. We recommend replacing all remaining older smoke detectors in the bedrooms. 
Customer is considering moving forward with the prevent solution within 2 weeks. This solution includes the installation of a new combo detector near front door.
We have replaced the combo detector near the front door. We recommend replacing all remaining older smoke detectors in the bedrooms. 
Customer is considering moving forward with the prevent solution within 2 weeks.

Michael W.

Michael W. Job Checkin

We have delivered pricing regarding the hot tub circuit and panel replacement.

We have delivered pricing regarding the hot tub circuit and panel replacement. We have delivered pricing regarding the hot tub circuit and panel replacement.

Michael W.

Michael W. Job Checkin

This solution includes the installation of a customer supplied fixture in kitchen area, new fixture to be relocated by 16inches. Additionally we shall replace the existing dining area light with a new customer supplied fixture and install the customer supplied ceiling fan in living room. The existing recess lights over kitchen island shall also be replaced and converted to the customer supplied pendant lights, 2 total. This also shall include the replacement of the existing basement fixture with a new customer supplied fixture.

This solution includes the installation of a customer supplied fixture in kitchen area, new fixture to be relocated by 16inches. Additionally we shall replace the existing dining area light with a new customer supplied fixture and install the customer supplied ceiling fan in living room. The existing recess lights over kitchen island shall also be replaced and converted to the customer supplied pendant lights, 2 total. This also shall include the replacement of the existing basement fixture with a new customer supplied fixture. This solution includes the installation of a customer supplied fixture in kitchen area, new fixture to be relocated by 16inches. Additionally we shall replace the existing dining area light with a new customer supplied fixture and install the customer supplied ceiling fan in living room. The existing recess lights over kitchen island shall also be replaced and converted to the customer supplied pendant lights, 2 total. This also shall include the replacement of the existing basement fixture with a new customer supplied fixture.

Michael W.

Michael W. Job Checkin

This solution includes the installation of a dedicated 120V 20A circuit to power the furnace. Permit and inspection included.

This solution includes the installation of a dedicated 120V 20A circuit to power the furnace. Permit and inspection included. This solution includes the installation of a dedicated 120V 20A circuit to power the furnace. Permit and inspection included.

Nicholas T.

Nicholas T. Job Checkin

This solution includes running a new 15 amp circuit for upstairs bedroom and also 2 dedicated 20 amp circuit for ac in same bedroom then splitting the two upstairs bedrooms so they are on separate circuits. Also we will re device both bedrooms to ensure the best and safest possible connection throughout the electrical circuit. These circuit must be protected by arc fault breakers due to the fact they are new circuits and the national electrical code requires them to be. We will run the circuits from the panel on the first floor to outside where they will be protected by UF wire which is rated to be outside. Neatly attached to the siding of the home then ran up the wall next to the drain then into the home on the back wall where the ac is plugged in at under the window and where the existing receptacle is. We will silicone the holes where will drill into the home to prevent water getting into the wall We will install a whole home surge protector to protect all home electronics and h

This solution includes running a new 15 amp circuit for upstairs bedroom and also 2 dedicated 20 amp circuit for ac in same bedroom then splitting the two upstairs bedrooms so they are on separate circuits. Also we will re device both bedrooms to ensure the best and safest possible connection throughout the electrical circuit.  These circuit must be protected by arc fault breakers due to the fact they are new circuits and the national electrical code requires them to be. We will run the circuits from the panel on the first floor to outside where they will be protected by UF wire which is rated to be outside. Neatly attached to the siding of the home then ran up the wall next to the drain then into the home on the back wall where the ac is plugged in at under the window and where the existing receptacle is.  We will silicone the holes where will drill into the home to prevent water getting into the wall 

We will install a whole home surge protector to protect all home electronics and h This solution includes running a new 15 amp circuit for upstairs bedroom and also 2 dedicated 20 amp circuit for ac in same bedroom then splitting the two upstairs bedrooms so they are on separate circuits. Also we will re device both bedrooms to ensure the best and safest possible connection throughout the electrical circuit.  These circuit must be protected by arc fault breakers due to the fact they are new circuits and the national electrical code requires them to be. We will run the circuits from the panel on the first floor to outside where they will be protected by UF wire which is rated to be outside. Neatly attached to the siding of the home then ran up the wall next to the drain then into the home on the back wall where the ac is plugged in at under the window and where the existing receptacle is.  We will silicone the holes where will drill into the home to prevent water getting into the wall 

We will install a whole home surge protector to protect all home electronics and h

Michael W.

Michael W. Job Checkin

This solution includes the repair to the 2gang switch box in the office area. We have repaired the 2gang switch box in the office area.

This solution includes the repair to the 2gang switch box in the office area.
We have repaired the 2gang switch box in the office area. This solution includes the repair to the 2gang switch box in the office area.
We have repaired the 2gang switch box in the office area.

Nicholas T.

Nicholas T. Job Checkin

Replace 2 first generation Siemens arc fault breaker controlling bedrooms. Replace three improper breakers, including an art fault that was removed and sometime in the past, then illegally replaced with a standard breaker. Return today and completed quoted Work. We replaced the two existing arc fault breakers that were the first generation that we’re going bad as well as installed in arc fall breaker back went to the master bedroom that somebody had removed in the past. We also replaced the tandem breaker on the left side of the panel that did not match the brand as well as the bottom right 20 amp breaker that was not the proper one as well. All the breakers in this left panel now match the brand.

Replace 2 first generation Siemens arc fault breaker controlling bedrooms.
Replace three improper breakers, including an art fault that was removed and sometime in the past, then illegally replaced with a standard breaker.
Return today and completed quoted Work. We replaced the two existing arc fault breakers that were the first generation that we’re going bad as well as installed in arc fall breaker back went to the master bedroom that somebody had removed in the past. We also replaced the tandem breaker on the left side of the panel that did not match the brand as well as the bottom right 20 amp breaker that was not the proper one as well. 
All the breakers in this left panel now match the brand. Replace 2 first generation Siemens arc fault breaker controlling bedrooms.
Replace three improper breakers, including an art fault that was removed and sometime in the past, then illegally replaced with a standard breaker.
Return today and completed quoted Work. We replaced the two existing arc fault breakers that were the first generation that we’re going bad as well as installed in arc fall breaker back went to the master bedroom that somebody had removed in the past. We also replaced the tandem breaker on the left side of the panel that did not match the brand as well as the bottom right 20 amp breaker that was not the proper one as well. 
All the breakers in this left panel now match the brand.

Nicholas T.

Nicholas T. Job Checkin

Install charger circuit

Install charger circuit Install charger circuit