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

Local Reviews

Rated 4.9 out of 5 stars based on 891 customer reviews

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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Excellent Service!

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Job Locations

Michael W.

Michael W. Job Checkin

This solution includes the installation of a new switch leg to operate the exterior fixture at soffit. Includes removal of existing junction and installation of proper box to house wiring. In addition we shall alleviate the double tapped neutrals and breaker. We have taken deposit. Customer to call office to confirm our return. We have installed new wiring from the existing switch to the exterior fixture. Additionally we have corrected the double tapped neutrals and breaker.

This solution includes the installation of a new switch leg to operate the exterior fixture at soffit. Includes removal of existing junction and installation of proper box to house wiring. In addition we shall alleviate the double tapped neutrals and breaker. 
We have taken deposit. Customer to call office to confirm our return.

We have installed new wiring from the existing switch to the exterior fixture. Additionally we have corrected the double tapped neutrals and breaker. This solution includes the installation of a new switch leg to operate the exterior fixture at soffit. Includes removal of existing junction and installation of proper box to house wiring. In addition we shall alleviate the double tapped neutrals and breaker. 
We have taken deposit. Customer to call office to confirm our return.

We have installed new wiring from the existing switch to the exterior fixture. Additionally we have corrected the double tapped neutrals and breaker.

Nicholas T.

Nicholas T. Job Checkin

Replace broken single pole switch next to the front door that controls the front lights. Replace front light switch

Replace broken single pole switch next to the front door that controls the front lights.
Replace front light switch Replace broken single pole switch next to the front door that controls the front lights.
Replace front light switch

Nicholas T.

Nicholas T. Job Checkin

Installation of a new dedicated 120 V 20 amp line from the main panel up to the cabinet above where the microwave will be installed.. Installation of arc fall protection on the new breaker for the microwave circuit as required by code. Installation of whole homes protection in the main panel to protect new kitchen equipment, as well as the rest of the home electrical system.

Installation of a new dedicated 120 V 20 amp line from the main panel up to the cabinet above where the microwave will be installed..
Installation of arc fall protection on the new breaker for the microwave circuit as required by code.
Installation of whole homes protection in the main panel to protect new kitchen equipment, as well as the rest of the home electrical system. Installation of a new dedicated 120 V 20 amp line from the main panel up to the cabinet above where the microwave will be installed..
Installation of arc fall protection on the new breaker for the microwave circuit as required by code.
Installation of whole homes protection in the main panel to protect new kitchen equipment, as well as the rest of the home electrical system.

Michael W.

Michael W. Job Checkin

This solution includes the installation of 2 receptacles in the master bedroom closet. Also includes removing and replacing the existing closet fixture with a new customer supplied fixture.

This solution includes the installation of 2 receptacles in the master bedroom closet. Also includes removing and replacing the existing closet fixture with a new customer supplied fixture. This solution includes the installation of 2 receptacles in the master bedroom closet. Also includes removing and replacing the existing closet fixture with a new customer supplied fixture.

Michael W.

Michael W. Job Checkin

We have delivered pricing regarding the installation of the Sense Monitoring System.

We have delivered pricing regarding the installation of the Sense Monitoring System.

Michael W.

Michael W. Job Checkin

We have delivered pricing for the various electrical tasks.

We have delivered pricing for the various electrical tasks. We have delivered pricing for the various electrical tasks.

Nicholas T.

Nicholas T. Job Checkin

The reason for today’s visit was to assess multiple issues in the home. First issue was the fact that the washer will trip occasionally when multiple things are on on the top floor. We found that the issue is that the washer is on with the lighting circuit that is also with the master bathroom hallway, bathroom back bedroom as well as the laundry lights. Remedy this we will need to run a dedicated circuit from the main panel up to the washer to separate it from the lighting circuit. The next issue was flickering lights that are happening on the second floor, which we found a lot of the devices in the home are the original backstabbed ivory devices from the late 80s. We recommended device in the entire home in which customer agreed due to the fact that they wanted them done for cosmetic reasons as well. Finally, after inspecting the main panel, we found that there has been multiple hands inside this panel over the years and we’re noticing some of the breakers flipping on and off felt ex

The reason for today’s visit was to assess multiple issues in the home. First issue was the fact that the washer will trip occasionally when multiple things are on on the top floor. We found that the issue is that the washer is on with the lighting circuit that is also with the master bathroom hallway, bathroom back bedroom as well as the laundry lights. Remedy this we will need to run a dedicated circuit from the main panel up to the washer to separate it from the lighting circuit. The next issue was flickering lights that are happening on the second floor, which we found a lot of the devices in the home are the original backstabbed ivory devices from the late 80s. We recommended device in the entire home in which customer agreed due to the fact that they wanted them done for cosmetic reasons as well. Finally, after inspecting the main panel, we found that there has been multiple hands inside this panel over the years and we’re noticing some of the breakers flipping on and off felt ex The reason for today’s visit was to assess multiple issues in the home. First issue was the fact that the washer will trip occasionally when multiple things are on on the top floor. We found that the issue is that the washer is on with the lighting circuit that is also with the master bathroom hallway, bathroom back bedroom as well as the laundry lights. Remedy this we will need to run a dedicated circuit from the main panel up to the washer to separate it from the lighting circuit. The next issue was flickering lights that are happening on the second floor, which we found a lot of the devices in the home are the original backstabbed ivory devices from the late 80s. We recommended device in the entire home in which customer agreed due to the fact that they wanted them done for cosmetic reasons as well. Finally, after inspecting the main panel, we found that there has been multiple hands inside this panel over the years and we’re noticing some of the breakers flipping on and off felt ex

Michael W.

Michael W. Job Checkin

Arrived onsite and was shown to the dining room where she explained she would like a chandaleir. She has a sprinkler head close to the center of the table but I’m certain i can get it center. I explained the necessary drywall damage to get it done, told her about how i would do it and then we discussed the chandalier install, told putting 2 dimmers in, 1 for the new fixture and 1 for the 4 existing recess. We will return December 8th to complete all the work. -run new wiring from the existing dining room switch, up into the ceiling and cut over to where we will install a bar brace box center of the dining room table - remove the single gang switch that is currently in the wall for 4 recess, and install a 2 gang and then put the new chandelier on a dimmer, as well as switch the recess over to a dimmer also - lay plastic to protect everything in the working area. - drywall cutting is necessary for the work to be completed - once 2 gang is cut in, both dimmers installed and the prewi

Arrived onsite and was shown to the dining room where she explained she would like a chandaleir. She has a sprinkler head close to the center of the table but I’m certain i can get it center. I explained the necessary drywall damage to get it done, told her about how i would do it and then we discussed the chandalier install, told putting 2 dimmers in, 1 for the new fixture and 1 for the 4 existing recess. We will return December 8th to complete all the work.  



-run new wiring from the existing dining room switch, up into the ceiling and cut over to where we will install a bar brace box center of the dining room table
- remove the single gang switch that is currently in the wall for 4 recess, and install a 2 gang and then put the new chandelier on a dimmer, as well as switch the recess over to a dimmer also
- lay plastic to protect everything in the working area.
- drywall cutting is necessary for the work to be completed
- once 2 gang is cut in, both dimmers installed and the prewi Arrived onsite and was shown to the dining room where she explained she would like a chandaleir. She has a sprinkler head close to the center of the table but I’m certain i can get it center. I explained the necessary drywall damage to get it done, told her about how i would do it and then we discussed the chandalier install, told putting 2 dimmers in, 1 for the new fixture and 1 for the 4 existing recess. We will return December 8th to complete all the work.  



-run new wiring from the existing dining room switch, up into the ceiling and cut over to where we will install a bar brace box center of the dining room table
- remove the single gang switch that is currently in the wall for 4 recess, and install a 2 gang and then put the new chandelier on a dimmer, as well as switch the recess over to a dimmer also
- lay plastic to protect everything in the working area.
- drywall cutting is necessary for the work to be completed
- once 2 gang is cut in, both dimmers installed and the prewi

Michael W.

Michael W. Job Checkin

This solution includes the installation of a 120V 20A circuit for the sauna. Additionally we shall make wiring repairs to the garage and install new gfci receptacles in garage and replacing the existing fixtures with new customer supplied exterior lights, 2 total. Lastly we shall restore power to the bathrooms. This solution also includes basic required surge protection at main panel. We have installed the sauna circuit, installed new gfci receptacles in garage, installed new gfci in basement bathroom, repaired the open ground in garage, installed surge protector and have begun to replace the garage lights. We shall return to replace the one remaining fixture, ensuring we return with the bronze bell box. We always recommend using a dedicated circuit for EV charging. Paid in full. We have installed the exterior fixture at garage.

This solution includes the installation of a 120V 20A circuit for the sauna. Additionally we shall make wiring repairs to the garage and install new gfci receptacles in garage and replacing the existing fixtures with new customer supplied exterior lights, 2 total. Lastly we shall restore power to the bathrooms. This solution also includes basic required surge protection at main panel.

We have installed the sauna circuit, installed new gfci receptacles in garage, installed new gfci in basement bathroom, repaired the open ground in garage, installed surge protector and have begun to replace the garage lights. We shall return to replace the one remaining fixture, ensuring we return with the bronze bell box. We always recommend using a dedicated circuit for EV charging. Paid in full.

We have installed the exterior fixture at garage. This solution includes the installation of a 120V 20A circuit for the sauna. Additionally we shall make wiring repairs to the garage and install new gfci receptacles in garage and replacing the existing fixtures with new customer supplied exterior lights, 2 total. Lastly we shall restore power to the bathrooms. This solution also includes basic required surge protection at main panel.

We have installed the sauna circuit, installed new gfci receptacles in garage, installed new gfci in basement bathroom, repaired the open ground in garage, installed surge protector and have begun to replace the garage lights. We shall return to replace the one remaining fixture, ensuring we return with the bronze bell box. We always recommend using a dedicated circuit for EV charging. Paid in full.

We have installed the exterior fixture at garage.

Nicholas T.

Nicholas T. Job Checkin

Arrived onsite and the resident showed me to the basement where she had a generator panel already in place, but wanted additional circuits moved into it. I had Tyler go throughout the home to confirm how many circuits it was and it turned out to be a total of 3 circuits total, one for the kitchen outlets, one for the bathroom outlets, and one for the bath and master bedroom lights. We will return to move the circuits over to the generator panel Monday December 8th closer to 9am. - Move a total of 3 circuits, one for the master bedroom lighting 15 amps, one for the master bath outlets 20 amps, and one for the kitchen outlets to the generator panel from their respective panel locations currently 20 amps . Add new QO breakers into the generator panel to power those 3 circuits moving forward.

Arrived onsite and the resident showed me to the basement where she had a generator panel already in place, but wanted additional circuits moved into it. I had Tyler go throughout the home to confirm how many circuits it was and it turned out to be a total of 3 circuits total, one for the kitchen outlets, one for the bathroom outlets, and one for the bath and master bedroom lights. We will return to move the circuits over to the generator panel Monday December 8th closer to 9am. 


- Move a total of 3 circuits, one for the master bedroom lighting 15 amps, one for the master bath outlets 20 amps, and one for the kitchen outlets to the generator panel from their respective panel locations currently 20 amps . Add new QO breakers into the generator panel to power those 3 circuits moving forward. Arrived onsite and the resident showed me to the basement where she had a generator panel already in place, but wanted additional circuits moved into it. I had Tyler go throughout the home to confirm how many circuits it was and it turned out to be a total of 3 circuits total, one for the kitchen outlets, one for the bathroom outlets, and one for the bath and master bedroom lights. We will return to move the circuits over to the generator panel Monday December 8th closer to 9am. 


- Move a total of 3 circuits, one for the master bedroom lighting 15 amps, one for the master bath outlets 20 amps, and one for the kitchen outlets to the generator panel from their respective panel locations currently 20 amps . Add new QO breakers into the generator panel to power those 3 circuits moving forward.

Michael W.

Michael W. Job Checkin

We have delivered pricing regarding the dedicated circuit for sump pump.

We have delivered pricing regarding the dedicated circuit for sump pump. We have delivered pricing regarding the dedicated circuit for sump pump.

Nicholas T.

Nicholas T. Job Checkin

Box expansion in hall bathroom from 2 gang to 3 gang, install customer supplied GFCI and Switch Install stack switch in hall bedroom 1 for ceiling fan/light combo; pull additional switch leg to fan from box. Attic access Install stack switch in hall bedroom 2 for ceiling fan/light combo; pull additional switch leg to fan from box. Attic access * Estimate subject to change if boxes for fans are not fan rated * Replace master bath fan switch with customer supplied timer switch

Box expansion in hall bathroom from 2 gang to 3 gang, install customer supplied GFCI and Switch
Install stack switch in hall bedroom 1 for ceiling fan/light combo; pull additional switch leg to fan from box. Attic access 
Install stack switch in hall bedroom 2 for ceiling fan/light combo; pull additional switch leg to fan from box. Attic access 
* Estimate subject to change if boxes for fans are not fan rated *
Replace master bath fan switch with customer supplied timer switch Box expansion in hall bathroom from 2 gang to 3 gang, install customer supplied GFCI and Switch
Install stack switch in hall bedroom 1 for ceiling fan/light combo; pull additional switch leg to fan from box. Attic access 
Install stack switch in hall bedroom 2 for ceiling fan/light combo; pull additional switch leg to fan from box. Attic access 
* Estimate subject to change if boxes for fans are not fan rated *
Replace master bath fan switch with customer supplied timer switch

Michael W.

Michael W. Job Checkin

This solution includes the replacement of the front exterior gfci. We have replaced the exterior gfci on front exterior.

This solution includes the replacement of the front exterior gfci. We have replaced the exterior gfci on front exterior. This solution includes the replacement of the front exterior gfci. We have replaced the exterior gfci on front exterior.

Nicholas T.

Nicholas T. Job Checkin

We will be disconnecting lines, running to attic fans and install installing junction boxes with blank plate plates in case they are needed for future use.

We will be disconnecting lines, running to attic fans and install installing junction boxes with blank plate plates in case they are needed for future use. We will be disconnecting lines, running to attic fans and install installing junction boxes with blank plate plates in case they are needed for future use.

Nicholas T.

Nicholas T. Job Checkin

Tested power in the kitchen receptacles as well as the microwave receptacle and found that the microwave itself has burnt up.