Grennan Construction

Grennan Construction is a family-owned roofing and siding company serving homeowners throughout Oakland County, Michigan. Founded on honesty, hard work, and a commitment to doing things the right way, we’ve built our reputation as one of the area’s most trusted exterior remodeling contractors.



For over a decade, our team has helped families protect, update, and transform their homes through high-quality roofing, siding, window installation, and exterior renovation services. Whether you need a complete roof replacement, durable James Hardie siding, or expert guidance on improving your home’s curb appeal, we are here to deliver lasting results.

Located on Orchard Lake Road Before Telegraph Road