Testimonials Articles

Drain Cleaning Maintenance in Other 29801

July 12, 2024

“Gabe courteous, knowledgeable PRO! My Tabby Smooch made a new true friend 😼 Thanks!!!”

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Circuit Breaker Installation Repair in Other 19809

June 28, 2024

“Andrew and Cameron did an excellent job and were very professional. They explained what they had completed. I would highly recommend this company for your electrical needs.”

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Circuit Breaker Installation Maintenance in Wilmington, DE 19809

June 28, 2024

“They did an excellent job installing new breakers, Andrew and Cameron were very professional and explained everything they completed, I would highly recommend this company for your electrical needs.”

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Plumbing Installation in Hockessin, DE 19707

June 27, 2024

“Tim and Anthony worked very efficiently and were always available to explain our new water softener, laundry sink , new sump pump and back up sump. Really nice guys and a great representative of your company. We are very pleased with their service.”

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Plumbing Installation in Hockessin, DE 19707

June 27, 2024

“Tim and Anthony worked very efficiently and were always available to explain our new water softener, laundry sink , new sump pump and back up sump. Really nice guys and a great representative of your company. We are very pleased with their service.”

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Ceiling Fan Installation in Landenberg, PA 19350

June 26, 2024

“Thanks to Andrew and Cameron for an amazing job installing our new ceiling fans! In the 2 years we've had this house we've had to call a ton of different contractors to get work done, but finding a good electrician in particular has been strangely challenging. We tried a few different companies and always had…

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Plumbing Repair in Brandywine, DE 19802

June 25, 2024

“Dennis was professional and courteous as he always is when we need any repairs to any of our plumbing issues! This time it was a leaking kitchen faucet. He identified the issue and repaired and replaced the problem within an hour. I am always confident and satisfied that with any plumbing issues I have in…

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Air Conditioning Maintenance in Other 19803

June 20, 2024

“Wonderful Service”

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Air Conditioning Maintenance in Wilmington, DE 19804

June 18, 2024

“This was the yearly checking of my air conditioner system – want to say that the Tech was very through with the job of checking the system and advised me on the work done – I have always been very pleased with all the work done by the employees of Jos. Frederick & Sons in…

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Electrical Installation in Claymont, DE 19809

June 15, 2024

“Amazing job by 2 curteous and knowledgable induviduals. Easy to talk to and explained the whole process, including how we were future proofing for a new lamp post.”

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Air Conditioning Maintenance in Brandywine, DE 19807-1114 Centreville

June 14, 2024

“Technician, Lucas Kemp arrived as scheduled. Performed 2024 annual inspection of residence AC unit including thermostat, and filter. Unit systems all in good working order . Reset thermostat for hot weather operation. Technician explained to owner what was done. Technician presented himself well, all questions were answered to my satisfaction. All contact with Jos. Frederick…

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Water Softener Replacement in Newark, DE 19702

June 13, 2024

“Love this guy! He is a true professional”

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Water Softener Replacement in Newark, DE 19702

June 13, 2024

“Love this guy”

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Air Conditioning Maintenance in Other 19803

June 13, 2024

“Lucas serviced our air conditioner and heater as well. He was on time, professional, friendly, and easy to communicate with. He was most efficient and replaced a dual capacitor on our air conditioner, which he had with him on his truck. After his explanation of membership, we agreed to join, which saved us money on…

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Toilet Repair Repair in Newark, DE 29711

June 10, 2024

“So appreciate the plumber coming to same day of my call. Gabriel was wonderful – polite, friendly, professional and easy to talk with. He fixed our toilet and kitchen faucet expertly and made sure everything was cleaned well before he left. Am very happy!”

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Gas Furnace Repair in Newark, DE 19711

June 7, 2024

“Aaron was extremely professional. He explained everything while providing excellent service.”

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Heat Pump Installation in Newark, DE 19711

June 7, 2024

“I could not be more impressed with the responsiveness and professionalism of these guys. My basement flooded and even though I wasn’t a current client, they dispatched someone quickly and installed a new heat pump quickly at a reasonable price. Highly recommend!”

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Air Conditioning Repair in Brandywine, DE 19809

June 6, 2024

“Lucas was courteous, professional, and explained everything in detail. I would let him back into my house anytime. Thank you”

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Plumbing Repair in Wilmington, DE 19806

June 5, 2024

“Friendly. On time. Knowledgeable.”

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Electrical Installation in Hockessin, DE 19707

June 5, 2024

“Fast an efficient service. Very helpful and explained how to use the new products and checked that it would not be a problen with our system. Very cooperative and a positive experience.”

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Electrical Installation in Hockessin, DE 19707

June 5, 2024

“Fast an efficient service. Very helpful and explained how to use the new products and checked that it would not be a problen with our system. Very cooperative and a positive experience.”

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Toilet Repair Replacement in Newport, DE 19804

June 5, 2024

“Gabe was very professional and did a great job installing my new toilet.”

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Drain Cleaning Maintenance in Newark, DE 19711

June 2, 2024

“Gabriel clearly specified our options, worked hard to discharge the blockage in our kitchen sink pipe, and continued to check if he had succeeded. He spent hours working , decided he needed to use a wider snake, and worked until the blockage was cleaned. I appreciated his hard work, perseverance, and easy going communications style.”

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Air Conditioning Repair in Brandywine, DE 19703

May 31, 2024

“The office called to let me know Lucas was on his way. He arrived with a smile and promptly set to work. He took care to wear booties when in my home . He was patient with my questioning and the fee for service was exactly what he quoted when he looked at my air…

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Toilet Repair Repair in Elsmere, DE 19805

May 28, 2024

“Tim and Anthony did an excellent job this morning. My toilet no longer rocks from side to side nor does it leak around the bottom. They also replaced my flush handle and the inside workings. Not only that but everything was cleaned up perfectly. I expect my toilet to last me many more years! Thank…

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Electrical Replacement in Other 19805

May 23, 2024

“Andrew and Cameron were par excellence. They were efficient, knowledgeable and worked well together. They explained everything and I trusted they were doing a good and honest job. Karen Louise Hall PS they changed their booties going in and out!”

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Air Conditioning Maintenance in Other 19803

May 21, 2024

“Donovan is very knowledgeable and helpful.Answers all questions and concerns!!!And very trustworthy!!He is an excellent Technician and should be recognized by your company as a model employee for knowledge,integrity, his willingness to guide the customer with a very positive experience!!!!!”

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Electrical Installation in Hockessin, DE 19707

May 16, 2024

“Getting used to having Andrew and Cameron here in recent weeks as they have installed and repaired several home items. Nice to work with, punctual and clean we’ve had nothing but good experiences with these guys. We appreciate their work.”

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Air Conditioning Replacement in Newark, DE 19711

May 12, 2024

“Thank you for your help!”

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Electrical Panel Installation in Newport, DE 19804

May 11, 2024

“Service performed on 5/10/24. Main service was to install whole-house surge protector. Additional service was new ceiling fan transmitter and remote and replace sump pump battery. Arrived on time, explained the process, and we had final inspection. This duo is professional, respectful, patient – with a sense of humor. I feel very comfortable having them…

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Electrical Panel Replacement in Bear, DE 19701

May 6, 2024

“I want to start out by tell you that was performs Andrew and Cameron which was performed om May 2 and 3 They arrived on time and things got started. Threw out the job they kept me informed. even though it took two days, It was nice to see how professional the job was going.”

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Air Conditioning Repair in Greenville, DE 19810

May 4, 2024

“Donovan did a great job. Easy fix. He was in/out in about 30 mins. He arrived at the scheduled time. Many thanks”

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Air Conditioning Installation in Bear, DE 19702

May 1, 2024

“Great service, very professional, knowledgeable and competent.”

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Electrical Replacement in Newark, DE 19711

May 1, 2024

“Andrew and Cameron were very professional and cleaned up as they worked. They did the job in a timely fashion. I would definitely use them again for any other electrical work.”

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Other Repair in Middletown, DE 19709

April 30, 2024

“Technicians are and were personable and knowledgeable. My husband and I both highly recommend them.”

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Air Conditioning Maintenance in Brandywine, DE 19803

April 29, 2024

“Lucas arrived on time,; he was very courteous, neat and extremely patient when answering my questions. He emailed me an invoice in a prompt, timely manner..I even told him I wanted him , not a different technician , to continue servicing my air conditioner and furnace.”

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Air Conditioning Maintenance in Brandywine, DE 19803

April 29, 2024

“Lucas arrived on time,; he was very courteous, neat and extremely patient when answering my questions. He emailed me an invoice in a prompt, timely manner..I even told him I wanted him , not a different technician , to continue servicing my air conditioner and furnace.”

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Gas Furnace Maintenance in Greenville, DE 19807

April 24, 2024

“They were on time and completed the job in a timely manner . Very polite .”

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Electrical Maintenance in Wilmington, DE 19804

April 13, 2024

“I’m thankful to have Jos. Frederick & Sons involved with all necessary things I require at times – all is explained and they work well doing whatever is necessary. I have had them working on all items I require – under plumbing, electrical, replacement of items – Andrew and Cameron worked well and explained all…

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Air Duct Maintenance in Wilmington,DE 19805

April 12, 2024

“Don was very friendly. He answered my questions and inspected the area in question confirming that all was safe. Frederick & Son has installed and has been servicing my heaters since 2005 and I have always been happy with their work.”

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Air Conditioning Maintenance in Other 19805

April 10, 2024

“Air conditioner was serviced. Both technicians were courteous and thorough. Excellent service!”

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Air Conditioning Maintenance in Other 19060

April 9, 2024

“Friendly, quick check on Air Conditioner”

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Faucet Repair Repair in Hockessin, DE 19707

April 5, 2024

“The work was done quickly and efficiently by professionals who were respectful, informed and skillful. It was a pleasure to have them do the repairs! I am grateful that I can count on Frederick’s for consistent quality and workmanship!”

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Electrical Panel Installation in Hockessin, DE 19707

April 5, 2024

“Andrew and Cameron were very courteous and professional , they did an excellent job and worked well as a team. I would highly recommend them to anyone looking for work to be done in a residential or commercial setting. Sincerely, Robert F. Montgomery II”

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Drain Cleaning Repair in Newark, DE 19702

April 3, 2024

“I’m very pleased with the service Dennis and Gabe provided. I appreciate how they kept me informed and explained what was causing the drain to continue to clog. I was given a price up front for the cost of the repair. They put down drop cloths to protect my floor and underneath the sink. The…

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Electrical Repair in Brandywine, DE 19806

March 29, 2024

“Andrew and his partner were wonderful. Extremely . I had a very tricky light/switch issue. They consulted the operations manual, ON LINE (which I never would have thought to do) to fix it. Fabulous. Kudos to them both. Thanks. Paul J. Arendt”

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Toilet Repair Repair in Pike Creek, DE 19808

March 29, 2024

“Both Dennis and Gabe were very pleasant and answered all our concerns.”

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Toilet Repair Repair in Pike Creek, DE 19808

March 29, 2024

“Both Dennis and Gabe were very pleasant and answered all our concerns.”

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Plumbing Replacement in Greenville, DE 19807

March 28, 2024

“Tim and assistant ( sorry, I forgot his name) both very pleasant and courteous)..came on time to replace the sump pump , it was quite rusted (I assume from the age of the pump). They had the replacement on their truck, which is a time saver – the cost for the new pump, was a…

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Plumbing Replacement in Greenville, DE 19807

March 28, 2024

“Tim and assistant ( sorry, I forgot his name) both very pleasant and courteous)..came on time to replace the sump pump , it was quite rusted (I assume from the age of the pump). They had the replacement on their truck, which is a time saver – the cost for the new pump, was a…

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Faucet Repair Repair in Other 19806

March 25, 2024

“Denis and Gabe were awesome. They were able to fix a hose bib for me without having to replace the whole thing which would have been a much more costly affair. I will continue to use this company and will highly recommend them to all my friends.”

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Gas Furnace Maintenance in Newark, DE 19711

March 19, 2024

“Lucas came out to check our gas heater for our maintenance agreement. He was personable and efficient. We have been customers of Jos. Frederick & Sons for many years and we have been very happy with their service.”

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Plumbing Replacement in New Castle, DE 19720

March 17, 2024

“I am a commercial Facility Manager with CBRE. Two ejection pumps/sewer pumps failed at a local urgent care center that I manage and because this was a medical center and they had already been closed for the day – it was an emergency. I attempted to use a CBRE approved vendor but he was unable…

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Electrical, HVAC, Plumbing, and Sump Pump Installation in Middletown, DE 19709-8888

March 15, 2024

“One of the best teams in Delaware . They did it all (electrical; heating; plumbing – full bathroom installation; sump pump; a/c ventilation). Outstanding service and sales.”

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Water Heater Replacement in Brandywine, DE 19803

March 14, 2024

“Gabriel was very professional. He was friendly, left everything clean, he was also trying to be quiet with the tools when I was on the phone in the next room. The price seemed high, but he at least made me feel like I was getting better service for it.”

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Water Heater Installation in Bear, DE 19701

March 7, 2024

“Great emergency service. I would call again for all my HVAC and plumbing needs. I highly recommended.”

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Air Conditioning Repair in Wilmington, DE 19805

February 21, 2024

“I have been a customer for 5 years now. This company is excellent. They make sure the job is done right. Their workmen are competent, knowledgeable, and courteous. When I have an issue with plumbing, the air conditioning equipment they installed, or anything else in my home, it is Joseph Frederick and Sons that I…

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Gas Stove Installation in Newark, DE 19711

February 15, 2024

“He did an amazing job, installing a new gas line and my new gas stove”

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Oil Furnace Repair in Brandywine, DE 19803

February 14, 2024

“I was impressed with John Ratcliffe. He listened attentively to me explaining our situation and offered various possible causes and fixes. All things considered, he assured me that our heater would be repaired that very evening. That was what I, as the customer, wanted to hear. Kudos to John! Olaf arrived and introduced himself. We…

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Sump Pump Installation in Wilmington, DE 19806

February 3, 2024

“Dennis was great!! Surely one of the best servicemen I have ever had. He replaced my 40 year old sump pump…was so efficient and knowledgeable. Because of him, I will use this company for other issues in the future.”

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Plumbing Repair in Other, 19808

February 2, 2024

“Excellent customer service. Professional and courteous. Dennis came up with a great solution for the bathroom shower issue until we are ready to do a full remodel.”

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Gas Furnace Maintenance in Bear, DE 19701

February 1, 2024

“Thank you, Donovan, for the excellent service. I appreciate your professionalism.”

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Gas Furnace Maintenance in Wilmington, DE 19802

January 30, 2024

“Want to compliment Lucas Kemp. He’s your first service tech to ever ask me if my radiators were all heating properly. Have owned my home since 1992 & have had furnaces serviced annually. Please pass this on to his supervisor. He was both courteous & pleasant. Hoping he does my maintenance next year.”

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Plumbing Repair in Newport, DE 19804

January 23, 2024

“Just wanted to write about the great service I received today. Dennis and Gabe were right on time, knowledgeable, did very clean work, and explained everything very thoroughly. In this day and age of poor service these guys are top notch. I have found my new plumbers!!”

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Whole-House Generator Maintenance in Greenville, DE 19807

January 23, 2024

“Andrew and Cameron, were punctual, arriving in A.M. Very polite, explained how generator would be serviced. Obviously had material/supplies on their truck to complete the jobl.. Andrew explained what they did today, and it was time for the annual maintenence service. I appreciate their courtesy, professionalism, efficient service. Thanks to Jos. Frederick & Sons for…

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Electrical Wiring Installation in Newark, DE 19711

September 26, 2023

“Clearly an experienced professional and expert in his field, very helpful in providing information that made our decision to proceed easier.”

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HVAC System Maintenance in Hockessin, DE 19707

July 15, 2023

“Donovan came on time and with the repair part. He diagnosed the problem over the phone. He finished the work in about 30 minutes. Excellent job!”

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AC System Repair in Greenville, DE 19807

July 13, 2023

“I had an AC issue and Donovan H from Jos Frederick and Sons did a great job at diagnosing the problem and fixing it on the spot. Very impressed by his knowledge and professionalism.”

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