1400 Miller Parkway
McHenry, IL 60050
866-369-3057

Local Reviews
for crystal lake, il

Rated 4.9 out of 5 stars based on 718 customer reviews

Great Service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Super service

Great experience from start to finish - everything was explained and the quality of work is fantastic. I could not be happier and highly recommend!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Back flow plumbing issue

Excellent customer service! We have used Black Diamond for years, new furnace, air conditioner and plumbing issues. We would recommend their services...... Thank you Black Diamond!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service. Dan is very personable, polite an explains work 2 be done.

Great experience overall. Valuable employee to your company.

  • Overall Experience
  • Quality
  • Price
  • Convenience

great service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service

our electrician was courteous and professional. Did an excellent job!

  • Overall Experience
  • Quality
  • Price
  • Convenience

great service

he knows his job he is a profesional

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service

Luis did another great job correcting our problem.

  • Overall Experience
  • Quality
  • Price
  • Convenience

Fast, Professional, Friendly

We are very pleased with our service today! I called at 5pm yesterday to report our clogged drain. I was connected directly with a human (no voicemail run around) who said they could send someone out in a few hours with an after hours service fee, or at 8am the next morning at standard pricing. Since we didn't have an active leak, I decided we could live until the next morning without the kitchen and opted for 8am. Dave showed up on time, got right to work, had all necessary parts and equipment on hand, was extremely clean and professional, and he had us up and running by 10:30am. We will absolutely use Black Diamond again in the future and highly recommend them!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service

Dave from Black Diamond was friendly and efficient. He did a great job, cleaned everything up and was very friendly. Highly recommend!

  • Overall Experience
  • Quality
  • Price
  • Convenience

A safer house

Thanks to teamwork among the different business segments of Black Diamond, our house is safer. We didn't know that the flexible aluminum dryer vent was clogged with lint - a major cause of house fires. That was found by a Black Diamond electrician who was installing a circuit breaker box (to replace an old fuse box - another source of house fires). We were called by Black Diamond to arrange for an HVAC specialist to come out the next day and install new, modern solid ventilation from the dryer to the outside. Money well spent. We can always count on Black Diamond!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great Service by Friendly, Knowledgeable Company & Technician

Setting up an appt. for the check/clean of our furnace was easy w/ a minimal, amount of wait time for the appt.to occur. Keo, the Black Diamond technician, arrived promptly, was smiling & friendly & displayed his experience with ease. Afterward, he filled me in on his findings, brought me up to date on the furnace's condition and left the area he worked in clean and free of work materials! I highly recommend this company as well as their technician, Keo! Job well done!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service , Doug did a great job vere happy!

Great service, Doug did a great job!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Fabulous experience, from start to finish

The person I first contacted was polite and efficient in promptly scheduling my job. The electrician was even early in arriving, and I was notified to make sure that was acceptable. The electrician, Doug, was phenomenal! He was friendly and so comfortable and knowledgeable about what I needed done and went right to work! He was done in no time and was very neat with his work. Well Done!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service!

Keo did an excellent job servicing our furnace and water heater. He was prompt, polite, professional and knowledgeable. I would highly recommend Keo and Black Diamond for maintenance and repair of your home mechanicals.

  • Overall Experience
  • Quality
  • Price
  • Convenience

Job Locations
for crystal lake, il

Luis E.

Luis E. Job Checkin

Water heater


Luis E.

Luis E. Job Checkin

Clogged kitchen sink


Luis E.

Luis E. Job Checkin

Clogged drain


Luis E.

Luis E. Job Checkin

Water heater.


Luis E.

Luis E. Job Checkin

Water leak.


Luis E.

Luis E. Job Checkin

Clogged drain.


Luis E.

Luis E. Job Checkin

No water


Luis E.

Luis E. Job Checkin

Water leak.


Luis E.

Luis E. Job Checkin

Faucet leaking


Luis E.

Luis E. Job Checkin

Water heater


Luis E.

Luis E. Job Checkin

Floor drain


Luis E.

Luis E. Job Checkin

Sink install & shut off valve


Luis E.

Luis E. Job Checkin

Water leak.


Luis E.

Luis E. Job Checkin

Water leak.


Luis E.

Luis E. Job Checkin

Tankless water heater