My experience with OP Construction was outstanding. They helped me with my ADU in Downey. 3 bed 2 bath. From the moment they started they were at the site every day. We obtained final inspection signatures within 5 month turn around period. Not only did we beat our schedule but we met our budget. No do overs on inspections which means they know what they are doing. What I really liked is they are always thinking ahead. Great communication skills keeping me updated on the progress Very professional as-well, cleans up after themselves and leaves things put away at end of the day. Super satisfied.!!!! Must build again. read more