Every contractor below holds an active California license with an office of record in Moreno Valley, verified against CSLB public data as of November 6, 2026: general builders — A (General Engineering) and B (General Building), the classifications that can build an ADU — and the licensed trades ADU construction uses, C-10 Electrical, C-36 Plumbing and C-5 Framing & Rough Carpentry. Listings are alphabetical; the featured builder is labeled, never ranked.
★ FEATUREDMars Construction Industries Corp
ADU Cities' own design-build team
CSLB #1138550 · A · B · C-36 · C-20
Building ADUs across Los Angeles, Orange, Riverside, San Bernardino, San Diego & Ventura counties
M R C Restoration Inc
CSLB #1112728 · Moreno Valley, CA
B
CSLB #1135498 · Moreno Valley, CA
C-10C-39
CSLB #1132267 · Moreno Valley, CA
B
CSLB #1049408 · Moreno Valley, CA
C-10
Mark Derek Lien
CSLB #653677 · Moreno Valley, CA
B
CSLB #710721 · Moreno Valley, CA
A
CSLB #1124114 · Moreno Valley, CA
B
CSLB #1098594 · Moreno Valley, CA
BC-39
Mc California Hardscape
CSLB #1136899 · Moreno Valley, CA
B
CSLB #1155702 · Moreno Valley, CA
B
CSLB #1046047 · Moreno Valley, CA
C-36
CSLB #1073221 · Moreno Valley, CA
A
CSLB #1153834 · Moreno Valley, CA
B
Olympus Engineering Corp
CSLB #1075130 · Moreno Valley, CA
AC-12
CSLB #878553 · Moreno Valley, CA
BC-10
CSLB #892688 · Moreno Valley, CA
B
CSLB #1044161 · Moreno Valley, CA
C-33C-5
CSLB #702097 · Moreno Valley, CA
C-36
CSLB #879426 · Moreno Valley, CA
BC-10C-17D-16D-28
Emergency Response Plumbing And Drain Inc
CSLB #939164 · Moreno Valley, CA
C-36
CSLB #1133796 · Moreno Valley, CA
B
R & R Construction
CSLB #949594 · Moreno Valley, CA
B
CSLB #606310 · Moreno Valley, CA
BC-29
N C D Inc
CSLB #799409 · Moreno Valley, CA
BC-15D-16D-35
CSLB #1118860 · Moreno Valley, CA
B
CSLB #1013706 · Moreno Valley, CA
BC-36
CSLB #972877 · Moreno Valley, CA
AB
CSLB #583617 · Moreno Valley, CA
B
CSLB #969208 · Moreno Valley, CA
B
CSLB #1009329 · Moreno Valley, CA
C-10
CSLB #1084732 · Moreno Valley, CA
B
CSLB #1158500 · Moreno Valley, CA
C-36
CSLB #1095445 · Moreno Valley, CA
C-36
CSLB #1037238 · Moreno Valley, CA
BC-20
One Pro Construction And Services Inc
CSLB #1104234 · Moreno Valley, CA
B
CSLB #1103342 · Moreno Valley, CA
B
CSLB #996972 · Moreno Valley, CA
C-10
CSLB #1064559 · Moreno Valley, CA
BC-10
CSLB #876820 · Moreno Valley, CA
B
CSLB #1122981 · Moreno Valley, CA
B
CSLB #917161 · Moreno Valley, CA
C-10
CSLB #867023 · Moreno Valley, CA
ABC-8
CSLB #540575 · Moreno Valley, CA
C-36
CSLB #916461 · Moreno Valley, CA
B
CSLB #1107300 · Moreno Valley, CA
B
CSLB #929948 · Moreno Valley, CA
B
CSLB #712507 · Moreno Valley, CA
C-36
CSLB #1105437 · Moreno Valley, CA
C-36
CSLB #574469 · Moreno Valley, CA
C-10
CSLB #1110250 · Moreno Valley, CA
C-10