Need Roofer in East Bay (California)

[Chheang Yang]

Hi,

I just purchased a home in the east bay for a flip.  However, I'm surprised to see the quotes for an overlay roof.  The current roof is composite shingles and is original, roughly 30 years old.  There's no water damage or anything.  However, it's starting to show wear.

Since it's only 1 layer, I believe I can overlay without an issue.  Does anyone know a roofer for the east bay area?

Thanks!