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Licensed general contractors and ADU builders in Ontario

325 contractors with a Ontario mailing address hold an active (CLEAR) CSLB B General Building license in CSLB's license file dated Oct 20, 2026. Get quotes from up to 3 of them →

A B General Building license covers jobs with two or more unrelated trades, like an ADU, an addition or a remodel. A B contractor can't take a stand-alone plumbing, electrical or roofing job unless they also hold that specialty license or subcontract it to someone who does.
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A Featured spot on this general building & adu page for Ontario is a paid ad for a License Verified contractor, labeled "Ad" every time. It sits apart from the directory and never changes the order below. From $49/mo. Join the waitlist →

All 325 licensed general contractors and ADU builders

Order: A–Z by business name (neutral, stated). Showing 1–100.
8A CONSTRUCTION SERVICES INC
B · Lic. #925552 · Ontario 91764
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
A - INDUSTRIAL DESIGN / BUILD
B · Lic. #969373 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
A I C INTERIOR INC
B · Lic. #806562 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
A T S CONSTRUCTION
B · Lic. #807837 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
A2Z BUILDERS GROUP INC
B · Lic. #1150914 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ABL CONTRACTING INC
B · Lic. #1126537 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ABOVEGROUND SOLUTIONS INC
B · Lic. #1106979 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ACE ENGINEERING INC
B · also A, ASB, C-21 · Lic. #613320 · Ontario 91764
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ACES CONSTRUCTION
B · Lic. #1083500 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ACTION RESTORATION
B · Lic. #798665 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ADVANCE CONSTRUCTION
B · Lic. #842289 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ADVANCED TECHNOLOGY INC
B · also C-10 · Lic. #1064615 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
AG BUILDING AND REMODELING INC
B · Lic. #1153779 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AHOME CONSTRUCTION INC
B · Lic. #1066852 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AL CONSTRUCTION & DESIGN
B · Lic. #1161927 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ALBERTO GARCIA CONSTRUCTION SERVICES INC DBA A G CONSTRUCTION
B · also C-8, C-10, C-29 · Lic. #793245 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ALBERTO GARCIA CONTRACTOR
B · also C-10, C-29 · Lic. #624340 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ALJOHN BUILDERS
B · Lic. #616383 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ALLIANCE COMMUNICATION SERVICES INC
B · also C-7 · Lic. #746796 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ALLSTAR ADU & GENERAL BUILDER
B · also C-54 · Lic. #1009628 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AMBAK CONSTRUCTION
B · Lic. #923086 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AMERICAN GENERAL BUILDERS
B · Lic. #1114159 · Ontario 91746
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AMILCAR M CASTILLO
B · Lic. #711675 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AMINS CONSTRUCTION INC
B · Lic. #1149094 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ANDA
B · Lic. #1032575 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ANSARY ABOUBAKARE
B · also C-20, C-38 · Lic. #1042235 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
ANTON CONSTRUCTION
B · also A · Lic. #461541 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ARTISAN CONSTRUCTION
B · Lic. #1087835 · Ontario 91762
Workers' comp: exempt
Active — CSLB flag: case or citation pending
ASHKA DESIGN & CONSTRUCTION
B · Lic. #1145356 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
AUSTIN/JONES CORP
B · also C-33 · Lic. #656299 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
B FRIES CONSTRUCTION INC
B · Lic. #735157 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
B Z B CONSTRUCTION COMPANY
B · Lic. #599680 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BALTO DEVELOPMENT INC
B · Lic. #1067561 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BAYWOOD CONSTRUCTION CO
B · Lic. #415687 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BC7 CONSTRUCTION INC
B · also C-36 · Lic. #1049615 · Ontario 91764
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BCBC CONSTRUCTION
B · Lic. #926682 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BEST CHOICE BUILDING & DEVELOPING
B · Lic. #1084808 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BGW BUILDING PRODUCTS INC
B · Lic. #1156225 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BLUE HAVEN POOLS
B · also C-53 · Lic. #816057 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BONILLA CONSTRUCTION
B · Lic. #919777 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BRANDON FISHER CONSTRUCTION
B · Lic. #848840 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BRIAN YAWCHING KAO
B · also C-10, C-20, C-36 · Lic. #897876 · Ontario 91764
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
BRILLIANT BUILDING GROUP
B · Lic. #1136246 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
BUENA VISTA CONTRACTORS
B · Lic. #1112707 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
C B HOME CONSTRUCTION
B · Lic. #961219 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
C B HOME CONSTRUCTION INC
B · Lic. #1069527 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
C M CONSTRUCTION GENERAL CONTRACTORS INC
B · Lic. #677379 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CADRE CONSTRUCTION LLC
B · Lic. #1148827 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CALPOINT CONSTRUCTION INC
B · Lic. #1132890 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CANO ARCHITECTURE CONCRETE REPAIR
B · also C-8 · Lic. #414320 · Ontario 91762
Workers' comp: via leasing/temp firm
✓License Verified CSLB file · Oct 20, 2026
CAP ANGELES CONSTRUCTION INC
B · Lic. #1115382 · Ontario 91764
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CASTLE CONSTRUCTION AND DEVELOPMENT INC
B · Lic. #1149616 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CBX CONSTRUCTION INC
B · also C-7, C-10 · Lic. #1132477 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CDN CONSTRUCTION
B · Lic. #1109836 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CHAVA'S MARBLE & TILE
B · also C-54 · Lic. #692159 · Ontario 91766
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CHOICE BUILDER SOLUTIONS LLC
B · also A · Lic. #1032593 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CHRISTOPHER ARVIZU
B · Lic. #1043693 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CJ CONSTRUCTION SERVICES
B · Lic. #1132772 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CLASSIC KITCHENS ETC INC DBA JOHN I ADAMS CONSTRUCTION
B · Lic. #1011138 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CLEAN POWER CONSTRUCTION
B · also C-10 · Lic. #1041123 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
COMMERCIAL CONCRETE CONSTRUCTORS INC
B · also A, C-8 · Lic. #858888 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
COMTRACT COMMUNICATIONS INC
B · also C-7 · Lic. #598482 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CONSTRU ONE INC
B · also A · Lic. #972427 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CONSTRUX WEST INC
B · Lic. #1146772 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CONTROL SYSTEMS
B · also C-10 · Lic. #1099963 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CORREA CONSTRUCTION
B · also C-8 · Lic. #482342 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
COX COMMERICAL & INDUSTRIAL INC
B · Lic. #868078 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CPL CONSTRUCTION INC
B · Lic. #1130846 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CRAIG E HOLBROOK
B · Lic. #478551 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CROWN CONSTRUCTION GROUP INC
B · Lic. #1143986 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CUSTOM CARPENTRY
B · Lic. #826799 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
CUSTOM CONSTRUCTION
B · also C-39 · Lic. #630203 · Ontario 91764
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
CUSTOM HOMES CONTRACTOR DBA CUSTOM HOMES CONSTRUCTION
B · also C-20, C-38 · Lic. #1045173 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
D & D CONTRACTORS INC
B · Lic. #966076 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
D M GORDER CONSTRUCTION CO
B · also C-36, C-54 · Lic. #632348 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DAVID LEUNG
B · also C-15 · Lic. #731215 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DAYLIGHT SOLAR ENERGY CORP
B · also C-10, C-46 · Lic. #903293 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DB CONSTRUCTION INC
B · Lic. #1039670 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DC2 CONSTRUCTION
B · also C-15 · Lic. #763460 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DCHRISTJAN FINE CABINETRY
B · also C-33 · Lic. #776103 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DDL CONSTRUCTION INC
B · Lic. #1142403 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DDPT INC
B · also C-54 · Lic. #1142270 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DESIGN WINDOWS & DOORS INC
B · also C-17 · Lic. #912367 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DESIGNER WORKS
B · also C-23, C-51 · Lic. #986451 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DEVINE LOOKS HOME DESIGN & CONSTRUCTION
B · Lic. #1074899 · Ontario 91764
Workers' comp policy on file
Active — CSLB flag: workers' comp suspension pending
DGI STRUCTURES INC
B · Lic. #994472 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DH REMODEL & CONSTRUCTION INC
B · Lic. #808571 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DI SHAO CONSTRUCTION
B · Lic. #1153127 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DIAMOND AIR SERVICES INC
B · also C-20, C-43 · Lic. #1047483 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DIAMOND WEST BUILDERS
B · Lic. #921003 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DIGITAL TECHNOLOGIES INC
B · also C-7, C-10 · Lic. #894551 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DOJA INC
B · also A, C-12, C-21, HAZ · Lic. #597764 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
DRAPER PROPERTIES
B · Lic. #833028 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DUO CAP CONSTRUCTION INC
B · also A · Lic. #1131376 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
DVG COSTRUCTION
B · Lic. #1133506 · Ontario 91762
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026
EARTH & STRUCTURAL DEVELOPMENT LLC
B · also C-53 · Lic. #1159724 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
EDWARD C MIERAU
B · Lic. #787998 · Ontario 91761
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ELISEO MIRAMONTEZ
B · also C-6 · Lic. #857173 · Ontario 91762
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ELITE BUILDING CONTRACTORS INC
B · Lic. #1075032 · Ontario 91764
Workers' comp: exempt
✓License Verified CSLB file · Oct 20, 2026
ELITE CONSTRUCTION
B · Lic. #841247 · Ontario 91761
Workers' comp policy on file
✓License Verified CSLB file · Oct 20, 2026