Please complete the form below to receive a free roofing, siding, or exterior remodeling project estimate, or call us at 248-462-0224.

An employee of our licensed and insured company will be in touch to discuss your free estimate.

Thank you for choosing Grennan Construction.

Financing Also Available


Hearth is one of the most reputable lenders in the home improvement industry and we’re proud to be partnering with them. Applying for financial assistance has never been easier — get your application started today!

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"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."

FAQ — Roofing and Siding Installation

Why is roofing maintenance important?

It is crucial for you to stay on top of the maintenance as well as the condition of your roof as it is one of the most important features of your home. A roof serves as a barrier against debris, rain, wind, snow, branches, and more. If it is in bad shape, it can cause a lot of larger problems to your home that can end up being costly. With the help of a professional roofing contractor, you can ensure that your roof is installed correctly and is in great condition. free roof estimates Michigan

The Services We Provide

Grennan Construction — Roofing and Siding is a professional roofing company that assists both commercial and residential property owners. The services that we provide for our clients include roofing, siding, and windows, new roof installations, as well as repairs. Take a look at roofing and siding pages for more information on what we can offer our clients. free roof estimate Michigan

How We Can Help?

There are many homes that have moss, algae, missing shingles, and other unappealing aspects on their roof. Not only is this unappealing to potential homebuyers as well as homeowners, it is also unsafe. It can lead to early roof replacement due to improper maintenance and the damage that it caused. With the help of our professionals in Oakland County, MI, we can ensure that your roof is taken care of from start to finish.

Ready to replace or repair your roof? Contact us to get free roof estimates in Michigan.

A Proper Roof Installation

A proper roof installation for your home is crucial for its lifespan as well as for the protection of your property, and our roofers are the ones for the job. Our team at Grennan Construction — Roofing and Siding can provide you with free roof estimates and a wide range of discounts for the services you need.

Why Choose Our Company?

As a family-owned and operated company servicing Oakland County and the surrounding areas, Grennan Construction has earned a reputation for honesty and integrity. Fair business practices, quality workmanship, and superior customer service are some of the key reasons we stand apart from other companies.

Founded in 1998 by Fred and Phil Grennan, Grennan Construction takes great pride in providing what many people feel is the best customer service in the business. We will take the time to get to know you and what you want and need in a home improvement project, which allows us to offer the solution that is best suited for you.


Employees of our licensed and insured company will treat you like family – providing a free estimate and delivering prompt, courteous, and honest service. We will take pride in protecting your property – treating it as if it was our own. We are professional, neat, and efficient. We will follow-up your project with a comprehensive customer satisfaction survey to ensure that we fulfilled every commitment and that you are 100% satisfied with the end result.

When you are searching for a trusted company looking to provide the best service to their customers, contact us to get free roof estimates in Michigan.

Common Roof Problems We Fix

Possibly one of the biggest roof problems we often face in our line of work is lack of maintenance. Busy schedules can easily get in the way of looking at the quality of a roof, and that can invite unpleasant issues. If left unaddressed for too long, those issues can wreck your entire building.

We have experience in working on poorly maintained roofs. There are many other roof problems we can fix. Nails that jut out, missing, displaced, or lifted tiles and shingles, as well as leftover materials, are all extremely hazardous to roofing structures. When trouble comes, contact us to get free roof estimates in Michigan.


Complete the form above to receive free roof estimates in Michigan
Do you have additional questions?

We proudly serve Auburn Hills, Berkley, Birmingham, Bloomfield Hills, Clawson, Clarkston, Commerce, Davisburg, Farmington Hills, Ferndale, Franklin, Hazel Park, Highland, Holly, Huntington Woods, Lakeville, Leonard, Keego Harbor, Lake Angelus, Metro Detroit, Milford, Madison Heights, New Hudson, Novi, Oak Park, Oakland, Oakland County, Orchard Lake Village, Pleasant Ridge, Pontiac, Rochester, Rochester Hills, Southeast Michigan, Sylvan Lake, South Lyon, Southfield, Union Lake, Walled Lake, Troy, Villages of Franklin, Lake Orion, Ortonville, Oxford, Waterford, White Lake, West Bloomfield, & Wixom.

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