"Did a great job helping devise solutions for problems with a 98-year-old historic home. Carpentry & paint skills excellent! Good communicators. Always knew what to expect."
"I had a masonry job on my late 1920s home and Grennan Construction did an absolutely outstanding job. I would definitely use them again in the future!"
"I've used Grennan Construction for repairs and upgrades to my home and business. Fred and his crew have always done a great job at a reasonable price."
Join over 3.5K Oakland County residents by signing up for our informative, monthly newsletter.
Since 1988 we have been serving our community by providing the best roofing and siding services in Oakland County. Today, sign up to receive monthly updates, home maintenance advice, and special deals available only through our email newsletter.
Fred Grennan and his crew have replaced several roofs for my husband and I over the years and sided our current home from 1902. We are now ready for a new roof and will once again use Fred and his crew. I cannot say enough good things about this company, even down to their clean-up and the way they left my home when they were done. See you soon, Fred!
"This is the type of company you go to if you are seeking absolute professionalism.
The job: New Velux skylights + a tricky roof leak
The result: Perfect airtight seals
Mike is a pro's pro. Crystal clear communication, fair estimates, and he always followed through to make sure the job was done to standard.
I strongly recommend them and plan on hiring them again to redo our front door/window."
"Grennan Construction did a siding project on my home during the winter of 2018/2019. I selected Grennan over three other competitors. Fred‘s professionalism and honesty, along with his creative input to the project, were determining factors in selecting Grennan Construction. We used a James Hardie product and I could not be happier with the end result.
The crew that completed the project was fantastic. They worked through absolutely miserable conditions, due to the extreme cold and snow, while the project was going on (It was under 20° during most of the project). My home has some tall peaks and interesting angles, and they did an absolutely amazing job. Fred and the crew were also terrific with follow-up on any small touchups that needed to be done.
Grennan Construction did a terrific job on my project. I recommend them highly, without any hesitation, should you choose to consider them for siding or any other projects that Grennan does."
"Grennan Construction has performed service and repairs on my roof for a number of years. Fred is professional, honest, and a class act. He has never tried to sell me something that I don't need and is helping me get the most out of my aging roof. When it's time to reroof my home, Grennan will be the only call I'll need to make!"
"We were very happy with our roof and the professionalism of the crew. They did a great clean-up, also. We would definitely recommend!"
NICOLE MACY HUNTER
"I would like to say, Fred and Mike were very quick to respond. The crew they sent out was very professional and very experienced. I would highly recommend using them. My leak is gone from my roof now! Thanks, Guys."