Try the PaveSnap widget

This is exactly what sits on your website. A homeowner finds their address, traces the driveway, and gets an instant ballpark — and you get the lead. Search an address, hit Draw driveway, and trace the outline like a marker, then click Done — close & fill. Got a circular / horseshoe driveway? Trace the paved parts, then Cut out the grass island so it doesn't get counted. Once you have a number, Refine this estimate adds what a satellite can't see: tear-out, thickness, slope.

Demo uses sample asphalt rates. In your account you set your own pricing.