Diamond Grading, Inc.Excavating contractor in Riverside, CA

Diamond Grading, Inc. is ranked #17 of 47 excavating contractors in Riverside by CR Score, with 52 out of 100 as of November 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

Diamond Grading, Inc. is open Monday to Friday. Its listed hours are Monday to Friday, 8 AM – 3:30 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

Serves Riverside and 11 towns within 25 miles: Glen Avon, Jurupa Valley, Sunnyslope, Pedley, Rubidoux, Fontana, Eastvale, Bloomington, Norco, Rialto and Rancho Cucamonga. The list is based on the business's location and the usual service radius for excavating and grading. Confirm your address is covered when you call.

Diamond Grading, Inc. has a rating of 3.7 from 3 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

Call Diamond Grading, Inc. on (951) 200-5060. The business is at 4043 Avon St, Riverside, CA 92509. Ask for a written estimate before any work starts.