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

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.

Blaine A.

Blaine A. Job Checkin

For this job we came out for an annual maintenance check up per the VIP care plan where we went through an extensive checklist, thermal imaging of panel, pulled out multiple devices throughout home and looked at main electrical system. For the most post, electrical system is in great shape, however there were back stabbed devices throughout home and no smoke detectors. We went over the check list with the home owner as well as an estimate for the replacement of devices and rewiring each box we touch, including smoke detectors, all switches, receptacles and GFCI’s , excluding the kitchen as they were recently updated. Replace all devices original to the home excluding exterior and kitchen devices as they have been updated Replace (3) Carbon/Smoke detectors in home

For this job we came out for an annual maintenance check up per the VIP care plan where we went through an extensive checklist, thermal imaging of panel, pulled out multiple devices throughout home and looked at main electrical system. For the most post, electrical system is in great shape, however there were back stabbed devices throughout home and no smoke detectors. We went over the check list with the home owner as well as an estimate for the replacement of devices and rewiring each box we touch, including smoke detectors, all switches, receptacles and GFCI’s , excluding the kitchen as they were recently updated. 

Replace all devices original to the home excluding exterior and kitchen devices as they have been updated 
Replace (3) Carbon/Smoke detectors in home For this job we came out for an annual maintenance check up per the VIP care plan where we went through an extensive checklist, thermal imaging of panel, pulled out multiple devices throughout home and looked at main electrical system. For the most post, electrical system is in great shape, however there were back stabbed devices throughout home and no smoke detectors. We went over the check list with the home owner as well as an estimate for the replacement of devices and rewiring each box we touch, including smoke detectors, all switches, receptacles and GFCI’s , excluding the kitchen as they were recently updated. 

Replace all devices original to the home excluding exterior and kitchen devices as they have been updated 
Replace (3) Carbon/Smoke detectors in home

Dennis S.

Dennis S. Job Checkin

The reason for today’s visit was to quote installing a new 100 amp circuit for an EV charger. We spoke to the customer and he would like the circuit ran from the basement to the garage wall. We also explored options of correcting shared neutrals, double taps, and missing whole home surge protection as well for both panels. Customer was made aware of illegal connections and two buzzing breakers that were hazardous. Customer will review ours and other quotes and get back if deciding to move forward.

The reason for today’s visit was to quote installing a new 100 amp circuit for an EV charger. We spoke to the customer and he would like the circuit ran from the basement to the garage wall. We also explored options of correcting shared neutrals, double taps, and missing whole home surge protection as well for both panels. Customer was made aware of illegal connections and two buzzing breakers that were hazardous. Customer will review ours and other quotes and get back if deciding to move forward. The reason for today’s visit was to quote installing a new 100 amp circuit for an EV charger. We spoke to the customer and he would like the circuit ran from the basement to the garage wall. We also explored options of correcting shared neutrals, double taps, and missing whole home surge protection as well for both panels. Customer was made aware of illegal connections and two buzzing breakers that were hazardous. Customer will review ours and other quotes and get back if deciding to move forward.

Dennis S.

Dennis S. Job Checkin

Installation of new devices that are damaged throughout the home. This includes six devices on the third floor, three devices on the second floor, and three devices on the first floor.

Installation of new devices that are damaged throughout the home. This includes six devices on the third floor, three devices on the second floor, and three devices on the first floor. Installation of new devices that are damaged throughout the home. This includes six devices on the third floor, three devices on the second floor, and three devices on the first floor.

Michael W.

Michael W. Job Checkin

This solution includes the replacement of the home’s existing hardwired smoke alarms. We have replaced the homes existing hardwired smoke alarms. We have installed 4 standard alarms, one per bedroom and 1 combo detector per floor. 7 devices in total were replaced.

This solution includes the replacement of the home’s existing hardwired smoke alarms. 

We have replaced the homes existing hardwired smoke alarms. We have installed 4 standard alarms, one per bedroom and 1 combo detector per floor. 7 devices in total were replaced. This solution includes the replacement of the home’s existing hardwired smoke alarms. 

We have replaced the homes existing hardwired smoke alarms. We have installed 4 standard alarms, one per bedroom and 1 combo detector per floor. 7 devices in total were replaced.

Nicholas T.

Nicholas T. Job Checkin

separate doubled tapped ground and neutrals in main panel Removed wiring, running to an open junction box in the attic. Flip outlet and switch

separate doubled tapped ground and neutrals in main panel
Removed wiring, running to an open junction box in the attic.
Flip outlet and switch separate doubled tapped ground and neutrals in main panel
Removed wiring, running to an open junction box in the attic.
Flip outlet and switch

Ian  M.

Ian M. Job Checkin

For this job, we came out for a power loss issue on a circuit where there’s two receptacles without power and there was lighting, not working. Tested the switches they’re all functioning properly, I determined there was bad bulbs in the fixtures, and that was the case so we replace the bulbs customer supplied for him. Additionally, two GFCI‘s were not functioning, but we’re getting power, one in the bathroom and one for the utility closet on two separate circuits in the same area of the lighting had went out. I told the customer I thought it was from a small power surge, and he did say there had been a lightning strike near his home. Replace both GFCI’s in addition to replacing the bulbs for the customer and installed a whole home surge protector. Customer enrolled into our VIP care plan. Replace (2) GFCI that are damaged from what I believe to be from a surge as there is a series of bulbs out and no surge protection in panel Install (1) whole home surge protector

For this job, we came out for a power loss issue on a circuit where there’s two receptacles without power and there was lighting, not working. Tested the switches they’re all functioning properly, I determined there was bad bulbs in the fixtures, and that was the case so we replace the bulbs customer supplied for him. Additionally, two GFCI‘s were not functioning, but we’re getting power, one in the bathroom and one for the utility closet on two separate circuits in the same area of the lighting had went out. I told the customer I thought it was from a small power surge, and he did say there had been a lightning strike near his home. Replace both GFCI’s in addition to replacing the bulbs for the customer and installed a whole home surge protector. Customer enrolled into our VIP care plan.

Replace (2) GFCI that are damaged from what I believe to be from a surge as there is a series of bulbs out and no surge protection in panel
Install (1) whole home surge protector For this job, we came out for a power loss issue on a circuit where there’s two receptacles without power and there was lighting, not working. Tested the switches they’re all functioning properly, I determined there was bad bulbs in the fixtures, and that was the case so we replace the bulbs customer supplied for him. Additionally, two GFCI‘s were not functioning, but we’re getting power, one in the bathroom and one for the utility closet on two separate circuits in the same area of the lighting had went out. I told the customer I thought it was from a small power surge, and he did say there had been a lightning strike near his home. Replace both GFCI’s in addition to replacing the bulbs for the customer and installed a whole home surge protector. Customer enrolled into our VIP care plan.

Replace (2) GFCI that are damaged from what I believe to be from a surge as there is a series of bulbs out and no surge protection in panel
Install (1) whole home surge protector