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

Local Reviews

Rated 4.9 out of 5 stars based on 899 customer reviews

A repeat customer for a reason

We’ve been prepping our house for sale, and Haas & Sons has been invaluable.we’ve used H&S for repair and repairs installation work, with great results and good prices. Each team of electricians they’ve sent have been professional, friendly, and efficient.

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Really great work.

Michael did a fabulous job of getting my "floor thermostat" to work. In addition, he communicated well and was patient and clear when answering my questions. Haas uses AI to make appointments. It has advantages, but it got my name and address wrong. If I did it over again I would ask the AI to read back my name, address and phone number.

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Amazing Service, Very Helpful

Nick did an amazing job with explaining everything and what our nexts steps should be. Also helped walk through what he was doing.

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excellent service, prompt and efficient

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Excellant service!!!

Very professional and knowledgable. Thank you for fixing the problem with the outlet!

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Excellent

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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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Job Locations

Michael W.

Michael W. Job Checkin

We have delivered the pricing regarding the bath fans.

We have delivered the pricing regarding the bath fans. We have delivered the pricing regarding the bath fans.

Ian  M.

Ian M. Job Checkin

For this job, we came out for receptacles in the kitchen, not functioning. Multiple devices were backstabbed in the kitchen, and one of the back staff was loose on the device, causing the receptacles in series on that circuit to go out. I determine this by putting a multimeter from hot the ground and hot to neutral and determined the neutral was lost in the circuit. So we replaced the (4) receptacles, including a GFCI on the kitchen counter countertop on that particular circuit. Because of the backstab wiring method, customer asked if we could estimate the whole home for a re-device and rewire of each box. Additionally, we provided an estimate for a new range circuit to be installed as the customer would like to go from gas to electric range. While walking that scope of work, we noticed his main panel was full and not rated for tandem breakers to create space therefore we put together estimate options, including installing a subpanel coming off the main and moving multiple 15 amp circu

For this job, we came out for receptacles in the kitchen, not functioning. Multiple devices were backstabbed in the kitchen, and one of the back staff was loose on the device, causing the receptacles in series on that circuit to go out. I determine this by putting a multimeter from hot the ground and hot to neutral and determined the neutral was lost in the circuit. So we replaced the (4) receptacles, including a GFCI on the kitchen counter countertop on that particular circuit. Because of the backstab wiring method, customer asked if we could estimate the whole home for a re-device and rewire of each box. Additionally, we provided an estimate for a new range circuit to be installed as the customer would like to go from gas to electric range. While walking that scope of work, we noticed his main panel was full and not rated for tandem breakers to create space therefore we put together estimate options, including installing a subpanel coming off the main and moving multiple 15 amp circu For this job, we came out for receptacles in the kitchen, not functioning. Multiple devices were backstabbed in the kitchen, and one of the back staff was loose on the device, causing the receptacles in series on that circuit to go out. I determine this by putting a multimeter from hot the ground and hot to neutral and determined the neutral was lost in the circuit. So we replaced the (4) receptacles, including a GFCI on the kitchen counter countertop on that particular circuit. Because of the backstab wiring method, customer asked if we could estimate the whole home for a re-device and rewire of each box. Additionally, we provided an estimate for a new range circuit to be installed as the customer would like to go from gas to electric range. While walking that scope of work, we noticed his main panel was full and not rated for tandem breakers to create space therefore we put together estimate options, including installing a subpanel coming off the main and moving multiple 15 amp circu

Nicholas T.

Nicholas T. Job Checkin

Called out today due to power loss of the upstairs, garage, and front foyer. I asked the customer to show me their main electrical panel. They told me they previously tried to reset the breaker, which immediately tripped and arc’ed. I saw that the main breaker was still tripped and tried to reset it. This resulted in a large arc flash and the breaker tripping once more. I could see signs of significant corrosion on the main breaker, branch circuit breakers, and in the bottom of the panel box. This directed me to outside, in which I saw that the service cable had a large tear in it. This allowed rain water to enter the service cable and pour into the main panel. The entire panel needs to be replaced, as well as the service cable entering the home, to prevent this from happening again. A permit will have to be pulled to complete the work. A permit requires us to update the home electrical system to current county safety standards. This means two emergency disconnects and two surge protec

Called out today due to power loss of the upstairs, garage, and front foyer. I asked the customer to show me their main electrical panel. They told me they previously tried to reset the breaker, which immediately tripped and arc’ed. I saw that the main breaker was still tripped and tried to reset it. This resulted in a large arc flash and the breaker tripping once more. I could see signs of significant corrosion on the main breaker, branch circuit breakers, and in the bottom of the panel box. This directed me to outside, in which I saw that the service cable had a large tear in it. This allowed rain water to enter the service cable and pour into the main panel. The entire panel needs to be replaced, as well as the service cable entering the home, to prevent this from happening again. A permit will have to be pulled to complete the work. A permit requires us to update the home electrical system to current county safety standards. This means two emergency disconnects and two surge protec Called out today due to power loss of the upstairs, garage, and front foyer. I asked the customer to show me their main electrical panel. They told me they previously tried to reset the breaker, which immediately tripped and arc’ed. I saw that the main breaker was still tripped and tried to reset it. This resulted in a large arc flash and the breaker tripping once more. I could see signs of significant corrosion on the main breaker, branch circuit breakers, and in the bottom of the panel box. This directed me to outside, in which I saw that the service cable had a large tear in it. This allowed rain water to enter the service cable and pour into the main panel. The entire panel needs to be replaced, as well as the service cable entering the home, to prevent this from happening again. A permit will have to be pulled to complete the work. A permit requires us to update the home electrical system to current county safety standards. This means two emergency disconnects and two surge protec

Michael W.

Michael W. Job Checkin

This solution includes the installation of a 120V 20A dedicated circuit. Circuit shall be installed in the upstairs rooms, 2 receptacles, one per room. Included in this solution is arc fault protection. Circuit to be installed in a conduit body on exterior of home. Lastly includes surge protection at main panel.

This solution includes the installation of a 120V 20A dedicated circuit. Circuit shall be installed in the upstairs rooms, 2 receptacles, one per room. Included in this solution is arc fault protection. Circuit to be installed in a conduit body on exterior of home. Lastly includes surge protection at main panel. This solution includes the installation of a 120V 20A dedicated circuit. Circuit shall be installed in the upstairs rooms, 2 receptacles, one per room. Included in this solution is arc fault protection. Circuit to be installed in a conduit body on exterior of home. Lastly includes surge protection at main panel.

Ian  M.

Ian M. Job Checkin

For this job we came out to estimate. Customer requested recessed lighting in the kitchen area by removing 4 x 2 fixture that’s existing where power and switch leg are present as the fixture is being controlled by two dead and three ways. Upon walking the scope of work, we looked at the panel as we always do and found it to be in poor condition with multiple safety hazards including double tapped breakers, improperly, wired, multi wire branch circuits, no surge protection as well as no water or gas bond present. We provided multiple options for the lighting as well as our safety suggestions then we could be a priority given the condition of not only the panel, but of the service cable.

For this job we came out to estimate. Customer requested recessed lighting in the kitchen area by removing 4 x 2 fixture that’s existing where power and switch leg are present as the fixture is being controlled by two dead and three ways. Upon walking the scope of work, we looked at the panel as we always do and found it to be in poor condition with multiple safety hazards including double tapped breakers, improperly, wired, multi wire branch circuits, no surge protection as well as no water or gas bond present.  
We provided multiple options for the lighting as well as our safety suggestions then we could be a priority given the condition of not only the panel, but of the service cable. For this job we came out to estimate. Customer requested recessed lighting in the kitchen area by removing 4 x 2 fixture that’s existing where power and switch leg are present as the fixture is being controlled by two dead and three ways. Upon walking the scope of work, we looked at the panel as we always do and found it to be in poor condition with multiple safety hazards including double tapped breakers, improperly, wired, multi wire branch circuits, no surge protection as well as no water or gas bond present.  
We provided multiple options for the lighting as well as our safety suggestions then we could be a priority given the condition of not only the panel, but of the service cable.

Nicholas T.

Nicholas T. Job Checkin

Replace kitchen light with new customer supplied light Replace multi fed breakers

Replace kitchen light with new customer supplied light
Replace multi fed breakers

Michael W.

Michael W. Job Checkin

2/24/2025 10:27 AM This solution includes the installation of a customer supplied fixture and brace box. We have taken deposit and shall return March 4th to complete the scheduled work. Membership acquired.

2/24/2025 10:27 AM
This solution includes the installation of a customer supplied fixture and brace box. We have taken deposit and shall return March 4th to complete the scheduled work.
Membership acquired. 2/24/2025 10:27 AM
This solution includes the installation of a customer supplied fixture and brace box. We have taken deposit and shall return March 4th to complete the scheduled work.
Membership acquired.

Nicholas T.

Nicholas T. Job Checkin

Install 2 dedicated 20 amp circuits in garage First circuit will be located near the subpanel next to the receptacles we installed on a previous visit. Second circuit will be installed on the opposite end of the garage over where the wall mounted heater is located. We will install dual function breakers as required by safety and current code standards.

Install 2 dedicated 20 amp circuits in garage
First circuit will be located near the subpanel next to the receptacles we installed on a previous visit.
Second circuit will be installed on the opposite end of the garage over where the wall mounted heater is located.
We will install dual function breakers as required by safety and current code standards. Install 2 dedicated 20 amp circuits in garage
First circuit will be located near the subpanel next to the receptacles we installed on a previous visit.
Second circuit will be installed on the opposite end of the garage over where the wall mounted heater is located.
We will install dual function breakers as required by safety and current code standards.

Ian  M.

Ian M. Job Checkin

For this job, we came out to look at a range breaker that started tripping a few months ago. Upon looking at the specs of the range, we noticed the breaker was oversized for the new appliance as well as loose connection on the range cord. Additionally, there was a multi wire branch circuit and properly terminated in the panel as it was on (2) single pole breakers rather than properly on a two pole breaker with a common trip handle. We provided multiple options for circuit repair and safety. The customer chose the Replace option. Customer declined VIP Care Plan. Replace Range receptacle Replace Range breaker as it is oversized at 50 A, the oven electrical specs call for a 40A breaker


 For this job, we came out to look at a range breaker that started tripping a few months ago. Upon looking at the specs of the range, we noticed the breaker was oversized for the new appliance as well as loose connection on the range cord. Additionally, there was a multi wire branch circuit and properly terminated in the panel as it was on (2) single pole breakers rather than properly on a two pole breaker with a common trip handle. We provided multiple options for circuit repair and safety. The customer chose the Replace option. Customer declined VIP Care Plan. 

Replace Range receptacle 
Replace Range breaker as it is oversized at 50 A, the oven electrical specs call for a 40A breaker 
 For this job, we came out to look at a range breaker that started tripping a few months ago. Upon looking at the specs of the range, we noticed the breaker was oversized for the new appliance as well as loose connection on the range cord. Additionally, there was a multi wire branch circuit and properly terminated in the panel as it was on (2) single pole breakers rather than properly on a two pole breaker with a common trip handle. We provided multiple options for circuit repair and safety. The customer chose the Replace option. Customer declined VIP Care Plan. 

Replace Range receptacle 
Replace Range breaker as it is oversized at 50 A, the oven electrical specs call for a 40A breaker

Dennis S.

Dennis S. Job Checkin

The reasons for todays visit was to provide solutions for installation of 60 amp Tesla wall charger. We provided pricing to have the car charger installed to the left side of the panel as it would be the cheapest and most effective option. We also provided pricing for installation of a new surge protector.

The reasons for todays visit was to provide solutions for installation of 60 amp Tesla wall charger. We provided pricing to have the car charger installed to the left side of the panel as it would be the cheapest and most effective option. We also provided pricing for installation of a new surge protector. The reasons for todays visit was to provide solutions for installation of 60 amp Tesla wall charger. We provided pricing to have the car charger installed to the left side of the panel as it would be the cheapest and most effective option. We also provided pricing for installation of a new surge protector.

Nicholas T.

Nicholas T. Job Checkin

Removed broken bulb from inside oven and bathroom light

Removed broken bulb from inside oven and bathroom light Removed broken bulb from inside oven and bathroom light

Michael W.

Michael W. Job Checkin

This solution includes the installation of a dedicated 120V 20A circuit for a space heater in garage and a circuit for microwave. In addition we shall repair the receptacle in the garage that is loose.

This solution includes the installation of a dedicated 120V 20A circuit for a space heater in garage and a circuit for microwave. In addition we shall repair the receptacle in the garage that is loose. This solution includes the installation of a dedicated 120V 20A circuit for a space heater in garage and a circuit for microwave. In addition we shall repair the receptacle in the garage that is loose.

Blaine A.

Blaine A. Job Checkin

QToday’s visit was for a power loss to the master bath and hallway bathroom receptacles. During our investigation we tested power at each device, and they all read no voltage. We found a GFCI in the garage in the tripped position, so we reset it, and power was turned back on for all receptacles. We recommended to replace the garage GFCI due to age, because it is original to the home, making it over 40 years old. The bathroom receptacles are labeled garage GFCI in the main panel.

QToday’s visit was for a power loss to the master bath and hallway bathroom receptacles. During our investigation we tested power at each device, and they all read no voltage. We found a GFCI in the garage in the tripped position, so we reset it, and power was turned back on for all receptacles. We recommended to replace the garage GFCI due to age, because it is original to the home, making it over 40 years old. The bathroom receptacles are labeled garage GFCI in the main panel. QToday’s visit was for a power loss to the master bath and hallway bathroom receptacles. During our investigation we tested power at each device, and they all read no voltage. We found a GFCI in the garage in the tripped position, so we reset it, and power was turned back on for all receptacles. We recommended to replace the garage GFCI due to age, because it is original to the home, making it over 40 years old. The bathroom receptacles are labeled garage GFCI in the main panel.

Nicholas T.

Nicholas T. Job Checkin

Tested power at the trough heater GFCI at the trough from the opposite side of the road from the old barn and everything is up and working properly. It would appear that the old GFCI that was replaced or the old trough feeder had gone bad in which customer had already replaced. Once we put everything back together and tested power, we were getting proper voltage.

Tested power at the trough heater GFCI at the trough from the opposite side of the road from the old barn and everything is up and working properly. It would appear that the old GFCI that was replaced or the old trough feeder had gone bad in which customer had already replaced. Once we put everything back together and tested power, we were getting proper voltage.

Michael W.

Michael W. Job Checkin

This solution includes the installation of a new 120V 20A circuit and receptacle for EV charging. We have installed the new 120V 20A circuit.

This solution includes the installation of a new 120V 20A circuit and receptacle for EV charging.

We have installed the new 120V 20A circuit. This solution includes the installation of a new 120V 20A circuit and receptacle for EV charging.

We have installed the new 120V 20A circuit.