Mr. SokerBerkley, MI 48072

I bought the roof inspection from Angie's List because of their reviews and reputation. They inspected the garage, the roof on my house and attic. They found that my roof was in pretty good shape except for the flashing around my chimney which was just tar. They gave me an estimate to fix the issue and came back within a week or two and fixed that. Very easy to work with.

Mr. BowlingHowell, MI

"Very pleased with knowledge of craft and materials to be used. The crew was excellent. Would highly recommend.Very professional."

Mr. & Mrs. Rahja Waterford, MI

"We have had our roof done & blown-in attic insulation & we are completely satisfied with both jobs. We are so happy to deal with an honest company & you will definitely be called back for any home improvements we make. It is our pleasure to know Fred. Thank you for such great work & please use us as a reference. We will totally recommend you. I can't say enough!"

Mr. ThomasOxford, MI

"The whole crew worked their tails off to finish before the rain started. They worked until after dark, to wrap up the job."

Mr. RClarkston, MI

"Prompt, professional and courteous service received. We were very impressed with our phone calls being returned the same day, plus the contractor showed up on time. That level of service is very difficult to find. I highly recommend Grennan Construction for your roofing needs."

M. K.Oak Park, MI

"A personal 'Thank You' to Garric – he represented himself and your company very well."

Ms.LanzonMadison Heights, MI

"Fred was very thorough in his estimate and listened when I told him I wanted a little extra stuff done and understood why I wanted it done. To me it shows he knows what he is doing. The extra work will extend the life of my roof and it looks great. Jason and the crew were very polite (no loud nor foul language, which is normal for a lot of work crews). I was quite impressed. Jason took pride in making sure I was happy with the work and that they left everything exactly where they found it (lawn furniture, etc.). As a letter carrier I talk to a lot of people and see when they are working on their homes (or need to). I will make sure I let them know about Grennan Construction."

C.J.Oakland Twp., MI

"Dependable, honest, and efficient. Grennan Construction is the one to use for all your roofing needs. Thank you."

Mrs.ReiderPleasant Ridge, MI

"Fred is a really nice person to deal with. The materials used were of high quality."

Mrs.PascualBloomfield Hills, MI

"Fred was very professional, pleasant, and thorough in his presentation. I was very satisfied with his commitment to the job. Very nice presentation of job and what was involved with the contract and materials to be used. I was very happy with the appearance of roof after work was done. They cleaned up after and left the yard without debris. I would recommend them for and roof work."

Mr.StonysTroy, MI

"Fred Grennan was outstanding both in his work proposal presentation and customer satisfaction follow-up."

Mr. SchillerOakview Real Estate, Bloomfield Hills, MI

"Excellent care and workmanship. Job was completed ahead of schedule and superceded my expectations. Would recommend Grennan Construction to anyone in need of a great roof at a great price."

Diane M.Metamora, MI

"Very satisfied with the workmanship. Employees were very courteous and professional. Employees seemed to take pride in their work. Job site was cleaned up very well; like nothing was ever dome at the site. Fred always got back with us immediately with our questions & concerns. Yes, I would highly recommend Grennan Construction to others. Thank you for a fine job!"

Mr. A.R. Marrical Sr.Waterford, MI

"Grennan Construction executed a timely and outstanding roofing job at our house. The personnel were friendly and responsive, and did a superb job on our home. I don't believe you can find a better company to work on your house."

Mr. Clifton DawleyRochester Hills, MI

"Your company was a cut above the rest that I got quotes from. From the itemized quote to the finished job, the professionalism and quality workmanship was evident. You gave superior service at a reasonable price."

Mr. Mike DecaussinMI

"The true measure of a company's professionalism is how they handle problems after the initial work is done. I called about a problem that developed two months afterward and it was resolved within three days. A response like that would cause me to use Grennan Construction in the future. Thanks!"

Ms. G.Rochester, MI

"My salesperson was courteous. I never felt rushed or intimidated. He was patient and always willing to answer my questions. I felt a great deal of honesty and sincerity, as well as professionalism and knowledge of the job."

Mr.CalwellRochester, MI

"GarricDunkerson was EXCEPTIONAL from the bid, explanation of the problem (with photos), to fixing the problem. I could not be more satisfied with the service and quality. Thanks."

Mr. & Mrs. EdwardsRoyal Oak, MI

"The employees of Grennan Construction worked tirelessly to ensure our satisfaction on the roof, gutters, and siding installed this spring. The quote and presentation were professional and the employees were swift, thorough, and courteous. We appreciated how quickly the job was completed. The employees took great care in leaving our property in good condition. All work was done with the highest of standards and exceeded my expectations. I would refer them to friends and family."

Mr.ZayidCommerce Twp., MI

"Came when they said. Fully explained how they would do the job. Completed the job in a timely manner."

Mr. & Mrs.LestanTroy, MI

"Grennan Construction has the roof replacement experience perfected. Detailed verbal & written information was provided initially to help us understand the entire materials/work process. All work, including complete clean-up, was scheduled and performed within a 2½ day period by a friendly, co-operative, hard-working crew. We are COMPLETELY satisfied with every aspect of working with Grennan Construction and highly recommend them to anyone requiring new roofing."

Mr.LenhoffOrtonville, MI

"I well remember the stress that I went through over leaky skylights in my new home. Fred Grennan did a great job of eliminating my stress. He replaced the skylights with newer, higher quality skylights that have not leaked since. Fred was timely and extremely hard working. I strongly recommend Fred Grennan. I would not think of hiring anyone else for any roofing projects that I might need in the future. I am an attorney. I work under pressure – and I expect that the craftsmen that I hire to work on my home will deliver high quality work. Fred Grennan met my expectations, and then some."

Mrs.GingrasWaterford, MI

"I am very pleased with all the work you have done for me. You took the time to explain things and were patient with all the questions. The roof looks great and the siding looks great. We will be calling you soon to complete the rest of the siding. Again your patience with us is wonderful."

Mr.WashingtonFriendshipBaptistChurch, Pontiac, MI

"We were very impressed with the timeliness of completion. We needed the job done quickly and it was. Employees were very courteous and thorough."

Dr. Busch Waterford, MI

"We had a leaking flat roof. Fred and his crew did an excellent job of helping us. They gave us a fair assessment of the problem, proposed a cost-effective solution, and did the work on a short, rapid schedule. It was nice to have someone who does quality work give attention to a smaller job. Many large companies were 'too busy' to bother with us and some others seemed unreliable. Overall we were very pleased."


"Trustworthy and competent.A good job at a reasonable and fair price regardless of the size and cost of house. I appreciate that."

Ms.Axelson, Lake Orion, MI

Mr. Theis, Lake Orion

"Nice work. Job completed to my satisfaction. I'll keep your company in mind for future projects."

Mr. Theis, Lake Orion, MI

Mr. & Mrs. Richard

"I can't tell you how many times we have been complemented on the finished job of roofing and gutter work your company provided us. Please do not hesitate to use us as a reference as we were very pleased with the outcome of this project."

Mr. & Mrs. Richard, Imlay City, MI


"Your crew worked professional and expeditiously. What impressed me the most is how clean the work site was when the job was done. The gutters and downspouts look great, too! The seamless gutters and invisible screw fasteners have a very clean appearance. From start to finish, Grennan Construction has provided me with the most competitive pricing and, without a doubt, the professional results I expect."

Mr.Demres, Royal Oak, MI

Mr. Barron, Pontiac

"I am writing to thank you for the outstanding work you did in replacing the underlayment, installing soffits, and re-roofing my home this spring. It was an absolute pleasure to do business with you. The work was done rapidly and efficiently at a very reasonable price. The professionalism displayed by you and your crew was, in my opinion, outstanding. We have had numerous compliments from our neighbors and have given your name to other homeowners in the area."

Mr. Barron, Pontiac, MI

Kevin Taylor

Hello Grennan Construction,
Just a note of thanks for the excellent job completed recently by Grennan Construction on the roof of our house and barn. In the past I have not had many positive experiences with contractors and large projects at our home. Grennan Construction changed my overall opinion. The entire process from start to finish was handled in a very positive, professional manner. I always received communication in a very timely fashion and the quality of the workmanship was outstanding. Your entire crew was well presented, professional, polite and courteous. Your crew leader – Justin – was an absolute pleasure to work with. He took great care and pride in his work and it showed in each and every detail.

Thank you again for a job well done.
Best regards,

Kevin Taylor, Ortonville, MI

Bob & Pat Pisoni

"Pat and I would like to say that we were very glad that out of three bids for a new roof and three new skylights that we selected Grennan Construction. The workers were very professional in their effort and I must say listened to all our concerns and suggestions...The other companies we got bids from promised one day completion, but you somtimes wonder how many details would be missed with that type of approach. It's not how fast you complete the job, it's how well was it done. We will live here with this roof for many years and we are totally satisfied.

Thanks Fred & Justin and all."
Bob & Pat Pisoni, Highland, MI 

David P.

"First, thank you and your construction staff for an excellent job, in both planning and execution.  You are the consummate professional, and I/we are grateful that my good friend Jim referred you to me for my personal work, and then for the Heron Bay bid and project.

Please feel free to list me as a reference personally and for Heron Bay re the reroofing and insulation project."

Best personal regards,
David P, Bloomfield, MI