Diamond Garage Doors

John put in a new garage door for me. He is most professional and competent. I am a happy customer

John and his company are great. Well trusted, quality work, professional, on time, reliable and courteous will be well summarized words for their services. We have used John's services and recommended him to several friends in the last three years. Everyone has to agree to his professionalism, well-trusted and quality work. He stands by his product, his work and his warranty. Very well-communicated and provide excellent service. We wish that all other contractors will be like John so that consumers can have a piece of mind everytime things go wrong with the house. Highly reccommended. Good work, John and Diamond Garage Door. Please use us as references at anytime.

We got home from work and the garage door would not open. I called Diamond Garage Doors at 7:00pm and he was here by 8;00pm. He had wonderful customers service and my garage door is fixed.

We had a fantastic experience with Jon and Diamond Garage Doors. Our door unexpectedly broke and he was out immediately to check things out. He presented all of the information clearly and gave us extremely reasonable pricing. Our new door was installed immediately- we made our decision Tuesday and he was out Wednesday to install- and it was the day before Thanksgiving. He was here well into the darkness making sure everything was perfect. Jon and his company have exceeded our expectations- it is wonderful to find a company that you can trust.

The ower was prompt, very communicative and excellent price.

Jon fixed my garage door the same day that I called him. He pointed out several problems with the original installation and explained my options in clear terms without any pressure or hint of "pushing a sale". The final cost was more than fair and the new opener is much, much quieter than the old one, with extra features, too. I started off the day a bit angry at an unexpected repair but ended up very happy with the results! I recommend Diamond Garage Doors highly. (Mark, Software Consultant, Bethesda)

Wow! I'm adding my glowing review to all of the others on YP. And letting it post on FB because I want to spread the word about a great company. Diamond Garage Doors are terrific! Jon and his technician came to my rescue to repair my garage door, which was stuck halfway open. It was never installed right when we built the house (and it was installed by the company that made the door!). Now it just purrs as it opens. And he told me how to maintain it for good service.

Diamond Garage Doors had the best internet ratings, so I called them. Jon came to meet me within two days, and was very helpful. I thought I would have to get a new garage door opener, but he fixed my ancient remotes so they worked again. He also suggested some maintenance tips. His price was reasonable, and I would definitely use this service again.

I highly recommend Jon... you can tell he is an honest, knowledgable person who will do right by you. Jon responded to me very fast and came out same day to fix my garage door. He quickly replaced faulty sensors and also spotted a problem with the installation of the opener. He offered me the choice of fixing it and I gladly did so. Jon was really knowledgable, friendly, efficient, and his fees are very fair. I will use him if I need anything done again and highly recommend.

Jon is Really Good at what he does ! He is very experienced and professional. I highly recommend him for your garage door needs.

I originally inquired with John around fixing broken spring on my garage door. He was very professional, provided accurate pricing over the phone and showed up on agreed upon time. Not only John fixed my garage door, but also did maintenance on my other garage door, helped with remote and provided lot of guidance around garage maintenance. There were no hidden costs. I recommend John and Diamond Garage Doors.

Components of one of my garage doors related to the pulley broke and I requested my neighbors for suggestions. I received recommendations from several places and I checked up on them through an online Google search. This website, yellowpages.com, had several reviews for Diamond Garage Doors (“DGD”), or more specifically, for Jon Rosenthal. However, as I often do, I called 1-2 other places that neighbors had recommended in addition to DGD to get an idea of services. After receiving some basic information, I felt that going with DGD would be a good fit for my situation.



Because I wanted to get general info about repairing as well as possibly replacing my garage doors, I appreciated Jon’s discussion with me about the doors and my situation. His professionalism was apparent in his handling the situation and his casualness put me at ease. I also appreciated that Jon was willing to meet and discuss with me during a weekday evening due to some inflexible hours on my part and a weekend afternoon to repair my door.



I feel confident that should I eventually desire to replace the garage doors, Jon’s number would be the first that I call. Thanks Jon (and DGD)!

Awesome and prompt service. Exceptional quality and price. I called Jon, the owner, at 6:30 pm on a Tuesday and told him my garage door had a broken torsion spring. I gave him the details of the door over the phone, and within the hour he was at my house fixing it. I couldn't be happier. He is local, and he provides great quality service. I recommend him and his services without reservation. What a great company!

Jon Rosenthal and Diamond Garage Doors were terrific. We had some unique conditions in our garage that required customized changes to the garage door opener that was installed. Jon immediately recognized the problem and quickly had a solution. Jon and his crew were friendly, on time, and professional. I will use Jon and Diamond Garage Doors in the future, and give them my highest recommendation.

Jon was one of the most professional and genially kind individual I have met. He was prompt and on time for the appointment to install my garage door opener. He explained all the steps and procedures involved in installing the door and also did some additional maintenance on my door with our charging me. His price was very reasonable and he also carries extra supplies if there is something you may have forgotten. If you want reliable service I would defiantly recommend giving John a call!

Service was BEYOND compare. Jon was responsive and displayed the utmost professionalism and knowledge of his trade. Would highly recommend!

The torsion spring on our garage was broken. We called a few places and they wanted $350. I saw reviews for Diamond Garage Doors in yellow pages and spoke with John who was extremely friendly and charged basically half the price. He showed up the same day I called, installed new garage door springs and gave me some helpful tips to maintain the garage door over time. John was a true professional and just a very nice guy in general. If you need any garage door/opener work done, I highly recommend you call Diamond Garage Doors and ask for John.

We had the most positive recent experience using Diamond Garage Doors, particularly our interaction with John. He was reliable, provided affordable solutions, knowledgeable about his job and on top of that very personable! I felt he went the extra mile in not only delivering top notch service, but tips and advice to keep our garage well maintained. I appreciate when a company takes the time to educate their customers and make them feel comfortable when having to spend your hard-earned money. Diamon did both! I highly recommend them!

I also found Jon on CL and checked out the reviews on YP. Jon came and finished the installation of 2 garage doors within 2, 3 hours. The job is well-done, very professional, everything hauled away clean. On top, he gave me a very good price compared to Costco, Sears, etc. Highly recommended!

I had to replace the torsion spring on my garage door. Found Jon thru the Craigslist and read reviews here. His price was very reasonable, $160 for labor and part. He came within an hour of the call, on time, very professional. He also showed me how to do simple yearly maintenance by using white lithium grease on hinges and track endings. Gave a one-year labor and 5-year part warranty. Very satisfied. Will recommend.