UNDERWOOD LAW OFFICE, INC. Share: Legal Services UNDERWOOD LAW OFFICE, INC. Visit Website Request Info 2530 W. White Ave., Ste. 200 McKinney, TX 75071 (972) 535-6377 Rep Info Map Whom to Contact Mark Underwood Lawyer Phone: (972) 535-6377 What's Nearby? Distance: 5 10 15 20 25 50 mi.