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

Local Reviews

Rated 4.9 out of 5 stars based on 893 customer reviews

Excellent Service!

Professional and knowledgeable

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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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Job Locations

Nicholas T.

Nicholas T. Job Checkin

Insulation of bathroom exhaust fans in the second floor bathrooms. Installed a smart customer supplied fan in the primary bathroom and a upgrade kit into this hallway one.

 Insulation of bathroom exhaust fans in the second floor bathrooms. Installed a smart customer supplied fan in the primary bathroom and a upgrade kit into this hallway one.  Insulation of bathroom exhaust fans in the second floor bathrooms. Installed a smart customer supplied fan in the primary bathroom and a upgrade kit into this hallway one.

Nicholas T.

Nicholas T. Job Checkin

Replace all receptacles in primary bedroom

Replace all receptacles in primary bedroom Replace all receptacles in primary bedroom

Michael W.

Michael W. Job Checkin

We have replaced the existing damaged bulbs.

We have replaced the existing damaged bulbs. We have replaced the existing damaged bulbs.

Michael W.

Michael W. Job Checkin

This solution includes the replacement of the existing kiddie smoke alarms and combo detectors without working standby lights. We have replaced the damaged smoke and combo detectors in the lower levels of the home. We installed 2 combo and 2 standard smoke alarms. The home has the required working smoke and carbon monoxide/smoke alarms in the tenant spaces.

This solution includes the replacement of the existing kiddie smoke alarms and combo detectors without working standby lights.

We have replaced the damaged smoke and combo detectors in the lower levels of the home. We installed 2 combo and 2 standard smoke alarms. The home has the required working smoke and carbon monoxide/smoke alarms in the tenant spaces. This solution includes the replacement of the existing kiddie smoke alarms and combo detectors without working standby lights.

We have replaced the damaged smoke and combo detectors in the lower levels of the home. We installed 2 combo and 2 standard smoke alarms. The home has the required working smoke and carbon monoxide/smoke alarms in the tenant spaces.

Nicholas T.

Nicholas T. Job Checkin

Locate and repair receptacle causing arc fault to trip Found the issue, causing the tripping circuit to be the receptacle behind the bed in the primary bedroom where the ground wire was touching the neutral screw.

Locate and repair receptacle causing arc fault to trip
Found the issue, causing the tripping circuit to be the receptacle behind the bed in the primary bedroom where the ground wire was touching the neutral screw. Locate and repair receptacle causing arc fault to trip
Found the issue, causing the tripping circuit to be the receptacle behind the bed in the primary bedroom where the ground wire was touching the neutral screw.

Nicholas T.

Nicholas T. Job Checkin

Reset GFCI in the basement next to the panel to restore power to the exterior receptacles. Recommend installing cord and covers for the Christmas lights to avoid water inside to trip the GFCI.

Reset GFCI in the basement next to the panel to restore power to the exterior receptacles. Recommend installing cord and covers for the Christmas lights to avoid water inside to trip the GFCI. Reset GFCI in the basement next to the panel to restore power to the exterior receptacles. Recommend installing cord and covers for the Christmas lights to avoid water inside to trip the GFCI.

Michael W.

Michael W. Job Checkin

This solution includes the replacement of the existing foyer chandelier. We have replaced the existing chandelier with a new customer supplied fixture in the foyer.

This solution includes the replacement of the existing foyer chandelier.
We have replaced the existing chandelier with a new customer supplied fixture in the foyer. This solution includes the replacement of the existing foyer chandelier.
We have replaced the existing chandelier with a new customer supplied fixture in the foyer.

Nicholas T.

Nicholas T. Job Checkin

Install new wire to bath plug Install floor receptacle in living room Today we installed missing alumiconns in basement stairs light and removed hanging live line from above washer. While onsite we installed a new floor plug on the first floor next to the stairs. We also ran a constant hot line to the basement bath gfci so it will now work when switch is off.

Install new wire to bath plug
Install floor receptacle in living room
Today we installed missing alumiconns in basement stairs light and removed hanging live line from above washer.
While onsite we installed a new floor plug on the first floor next to the stairs. 
We also ran a constant hot line to the basement bath gfci so it will now work when switch is off. Install new wire to bath plug
Install floor receptacle in living room
Today we installed missing alumiconns in basement stairs light and removed hanging live line from above washer.
While onsite we installed a new floor plug on the first floor next to the stairs. 
We also ran a constant hot line to the basement bath gfci so it will now work when switch is off.

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.