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

Ian  M.

Ian M. Job Checkin

For this job, we came out to look at a gas furnace that was not functioning. The furnace is quite a bit older, however, the integrity of the electrical still intact. Tested the line voltage from the breaker coming into the switch at the furnace and turn the switch on showing the power is passing through into the furnace however, the furnace would not ignite. We determined that the issue was not electrical, luckily he has a body who does HVAC that is helping him out as well. Additionally, we noticed no whole home, surge protection, and the panel, nor was there a hot/cold/gas bonding jumper on the the water heater and gas pipe. Estimated those safety suggestion updates.

For this job, we came out to look at a gas furnace that was not functioning. The furnace is quite a bit older, however, the integrity of the electrical still intact. Tested the line voltage from the breaker coming into the switch at the furnace and turn the switch on showing the power is passing through into the furnace however, the furnace would not ignite. We determined that the issue was not electrical, luckily he has a body who does HVAC that is helping him out as well. Additionally, we noticed no whole home, surge protection, and the panel, nor was there a hot/cold/gas bonding jumper on the the water heater and gas pipe.  Estimated those safety suggestion updates. For this job, we came out to look at a gas furnace that was not functioning. The furnace is quite a bit older, however, the integrity of the electrical still intact. Tested the line voltage from the breaker coming into the switch at the furnace and turn the switch on showing the power is passing through into the furnace however, the furnace would not ignite. We determined that the issue was not electrical, luckily he has a body who does HVAC that is helping him out as well. Additionally, we noticed no whole home, surge protection, and the panel, nor was there a hot/cold/gas bonding jumper on the the water heater and gas pipe.  Estimated those safety suggestion updates.

Blaine A.

Blaine A. Job Checkin

Redevice entire family room circuit, including all receptacles and standard single pole switches in 5 gang box, using proper pigtail wiring method. Called out today to troubleshoot the family room that did not have power in the lights and receptacles. Using my plug tester, I discovered that the receptacles were hot/ground reverse, leading me to believe that a receptacle had possibly failed. I went down to the panel to test for voltage of the breakers, and all breakers read 120 volts. Customer told me that a previous company had done work in the home, adding a whole home generator. This lead me to further investigate the termination in the main electrical panel. I discovered that two neutrals were not properly torqued down and were floating on the neutral bus bar. I tightened these down and proper power was delivered to the devices. Due to the age and wiring style of the old devices, I recommended redevicing the circuit, to guarantee the terminations. Customer agreed to scope of work.

Redevice entire family room circuit, including all receptacles and standard single pole switches in 5 gang box, using proper pigtail wiring method. 

Called out today to troubleshoot the family room that did not have power in the lights and receptacles. Using my plug tester, I discovered that the receptacles were hot/ground reverse, leading me to believe that a receptacle had possibly failed. I went down to the panel to test for voltage of the breakers, and all breakers read 120 volts. Customer told me that a previous company had done work in the home, adding a whole home generator. This lead me to further investigate the termination in the main electrical panel. I discovered that two neutrals were not properly torqued down and were floating on the neutral bus bar. I tightened these down and proper power was delivered to the devices. Due to the age and wiring style of the old devices, I recommended redevicing the circuit, to guarantee the terminations. Customer agreed to scope of work. Redevice entire family room circuit, including all receptacles and standard single pole switches in 5 gang box, using proper pigtail wiring method. 

Called out today to troubleshoot the family room that did not have power in the lights and receptacles. Using my plug tester, I discovered that the receptacles were hot/ground reverse, leading me to believe that a receptacle had possibly failed. I went down to the panel to test for voltage of the breakers, and all breakers read 120 volts. Customer told me that a previous company had done work in the home, adding a whole home generator. This lead me to further investigate the termination in the main electrical panel. I discovered that two neutrals were not properly torqued down and were floating on the neutral bus bar. I tightened these down and proper power was delivered to the devices. Due to the age and wiring style of the old devices, I recommended redevicing the circuit, to guarantee the terminations. Customer agreed to scope of work.

Nicholas T.

Nicholas T. Job Checkin

Supply and replace motion flood light We remove the odor, broken floodlight and installed a new RAV stealth motion floodlight LED lamps

Supply and replace motion flood light
We remove the odor, broken floodlight and installed a new RAV stealth motion floodlight LED lamps

Michael W.

Michael W. Job Checkin

We have delivered pricing. We recommend having a plumber to check the septic equipment.

We have delivered pricing. We recommend having a plumber to check the septic equipment. We have delivered pricing. We recommend having a plumber to check the septic equipment.

Ian  M.

Ian M. Job Checkin

For this job we estimated to customer requested Carbon/Smoke detectors throughout the home. Additionally upon looking in the panel we noticed a few safety items we suggested updating including installing a whole home surge protector in the main panel as well as removing (4) single pole breakers and install (2) 2 pole breakers with common trip handle to remediate improperly wired multi-wire branch circuits.

For this job we estimated to customer requested Carbon/Smoke detectors throughout the home. Additionally upon looking in the panel we noticed a few safety items we suggested updating including installing a whole home surge protector in the main panel as well as removing (4) single pole breakers and install (2) 2 pole breakers with common trip handle to remediate improperly wired multi-wire branch circuits. For this job we estimated to customer requested Carbon/Smoke detectors throughout the home. Additionally upon looking in the panel we noticed a few safety items we suggested updating including installing a whole home surge protector in the main panel as well as removing (4) single pole breakers and install (2) 2 pole breakers with common trip handle to remediate improperly wired multi-wire branch circuits.

Nicholas T.

Nicholas T. Job Checkin

For today’s visit was for a removal of the old bad transformer with new transformer for video doorbell out front. The old one went bad and wasn’t reading correct voltage, so we replaced it and tested voltage, and the doorbell worked again. The customer had no existing chimes, so we recommend o buy the ring plug in chimes.


Dennis S.

Dennis S. Job Checkin

Installation of new switches for the primary bathroom inside of the primary bedroom.

Installation of new switches for the primary bathroom inside of the primary bedroom. Installation of new switches for the primary bathroom inside of the primary bedroom.

Nicholas T.

Nicholas T. Job Checkin

Inspected car charger and found no issues on the electrical end

Inspected car charger and found no issues on the electrical end Inspected car charger and found no issues on the electrical end

Dennis S.

Dennis S. Job Checkin

The reason for todays visit was to provide a solution on changing out customers existing exhaust fan. Customer has a NuTone that’s rattling in his primary bathroom. We recommended replacement with a Panasonic whisper which we stock on truck vs customer supplied. Customer was informed if using certain exhaust fans there will be Sheetrock repairs needing to take place versus with our stocked one. Today customer accepted quotes and will reach out if deciding to move forward.

The reason for todays visit was to provide a solution on changing out customers existing exhaust fan. Customer has a NuTone that’s rattling in his primary bathroom. We recommended replacement with a Panasonic whisper which we stock on truck vs customer supplied. Customer was informed if using certain exhaust fans there will be Sheetrock repairs needing to take place versus with our stocked one. Today customer accepted quotes and will reach out if deciding to move forward. The reason for todays visit was to provide a solution on changing out customers existing exhaust fan. Customer has a NuTone that’s rattling in his primary bathroom. We recommended replacement with a Panasonic whisper which we stock on truck vs customer supplied. Customer was informed if using certain exhaust fans there will be Sheetrock repairs needing to take place versus with our stocked one. Today customer accepted quotes and will reach out if deciding to move forward.

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