Specializing in Roofing, Siding, Windows, Gutters and Blown-In Insulation
Call Now 1-800-883-1998
917 Orchard Lake Rd., Pontiac, MI 48341
Grennan Construction - Welcome!

What makes Grennan Construction different?

    • Grennan Construction is family-owned and operated
    • Trust - Integrity - Professionalism - Honesty
    • We ensure that you understand every step of the process
    • We are fully licensed and insured
    • Inspections are meticulous, covering every element
    • Certified installers with several manufacturers
    • All work is 100% guaranteed - We stand behind our work!
    • We offer Military and Senior discounts
    • We take pride in protecting your property as if it were our own
    • A+ Rating with the BBB - We've never had a complaint!!