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Plumbers in Ontario, CA
53 plumbers in Ontario, CA. Every listing checked against the issuer's record, in the published order.
King Water Center
Upland, CA · WC exempt · 6 mi away
Proof for King Water Center
- License
- CSLB 671069
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C55 Water Conditioning
- Expires
- Jul 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Upland, CA · serves California
- Phone
- (626) 966-5208
- Listing
- Built from public records. Not claimed yet, so call them directly.
Klaus & Sons Plumbing Heating & Air Conditioning
Montclair, CA · WC ✓ · 6 mi away
Proof for Klaus & Sons Plumbing Heating & Air Conditioning
- License
- CSLB 320990
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C10 Electrical; C16 Fire Protection; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
- Expires
- Jul 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Montclair, CA · serves California
- Phone
- (909) 982-5698
- Listing
- Built from public records. Not claimed yet, so call them directly.
Know How Plumbing
Upland, CA · WC exempt · 6 mi away
Proof for Know How Plumbing
- License
- CSLB 1052689
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Apr 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Upland, CA · serves California
- Phone
- (626) 848-9262
- Listing
- Built from public records. Not claimed yet, so call them directly.
Kohler Mechanical Inc
Alta Loma, CA · WC ✓ · 7 mi away
Proof for Kohler Mechanical Inc
- License
- CSLB 837376
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Apr 30, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Alta Loma, CA · serves California
- Phone
- (909) 652-0901
- Listing
- Built from public records. Not claimed yet, so call them directly.
L B Precision Plumbing
Jurupa Valley, CA · WC ✓ · 10 mi away
Proof for L B Precision Plumbing
- License
- CSLB 1099237
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Dec 31, 2026
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Jurupa Valley, CA · serves California
- Phone
- (951) 333-0924
- Listing
- Built from public records. Not claimed yet, so call them directly.
Lancelot's Plumbing Service
Eastvale, CA · No WC on file · 8 mi away
Proof for Lancelot's Plumbing Service
- License
- CSLB 860753
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Jun 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- No current workers' comp on file
- Where
- Eastvale, CA · serves California
- Phone
- (844) 526-2356
- Listing
- Built from public records. Not claimed yet, so call them directly.
Latco - Latta Larry R
Chino, CA · WC exempt · 5 mi away
Proof for Latco - Latta Larry R
- License
- CSLB 634104
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C34 Pipeline; C36 Plumbing; C42 Sanitation System
- Expires
- Dec 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Chino, CA · serves California
- Phone
- (530) 575-5997
- Listing
- Built from public records. Not claimed yet, so call them directly.
Le Joseph Hoang
Chino Hills, CA · WC ✓ · 10 mi away
Proof for Le Joseph Hoang
- License
- CSLB 844902
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C10 Electrical; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
- Expires
- Aug 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Chino Hills, CA · serves California
- Phone
- (909) 539-5407
- Listing
- Built from public records. Not claimed yet, so call them directly.
Leak Doctor
Norco, CA · WC exempt · 8 mi away
Proof for Leak Doctor
- License
- CSLB 712465
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Dec 31, 2026
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Norco, CA · serves California
- Phone
- (951) 310-8520
- Listing
- Built from public records. Not claimed yet, so call them directly.
Leak Specialists
Chino Hills, CA · WC exempt · 10 mi away
Proof for Leak Specialists
- License
- CSLB 734392
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing; D35 Pool and Spa Maintenance
- Expires
- Apr 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Chino Hills, CA · serves California
- Phone
- (909) 590-8874
- Listing
- Built from public records. Not claimed yet, so call them directly.
Liberty General Contractors Inc
Norco, CA · WC exempt · 8 mi away
Proof for Liberty General Contractors Inc
- License
- CSLB 1111536
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C10 Electrical; C12 Earthwork and Paving; C36 Plumbing
- Expires
- Oct 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Norco, CA · serves California
- Phone
- (714) 412-5883
- Listing
- Built from public records. Not claimed yet, so call them directly.
Living Waters Backflow
Claremont, CA · WC exempt · 9 mi away
Proof for Living Waters Backflow
- License
- CSLB 969269
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Aug 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Claremont, CA · serves California
- Phone
- (760) 646-0194
- Listing
- Built from public records. Not claimed yet, so call them directly.
Local Guys Plumbing
Upland, CA · WC ✓ · 6 mi away
Proof for Local Guys Plumbing
- License
- CSLB 1141254
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Jul 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Upland, CA · serves California
- Phone
- (909) 985-5660
- Listing
- Built from public records. Not claimed yet, so call them directly.
London Plumbing
Upland, CA · WC exempt · 6 mi away
Proof for London Plumbing
- License
- CSLB 597489
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Jun 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Upland, CA · serves California
- Phone
- (909) 592-2418
- Listing
- Built from public records. Not claimed yet, so call them directly.
Lopiccolo Donald G
Rancho Cucamonga, CA · WC ✓ · 7 mi away
Proof for Lopiccolo Donald G
- License
- CSLB 477410
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
- Expires
- Jul 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Rancho Cucamonga, CA · serves California
- Phone
- (909) 463-8349
- Listing
- Built from public records. Not claimed yet, so call them directly.
Los Carnales Plumbing
Pomona, CA · WC exempt · 9 mi away
Proof for Los Carnales Plumbing
- License
- CSLB 1147159
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Dec 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Pomona, CA · serves California
- Phone
- (562) 986-3581
- Listing
- Built from public records. Not claimed yet, so call them directly.
Lt Plumbing
Chino, CA · WC exempt · 5 mi away
Proof for Lt Plumbing
- License
- CSLB 1073062
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Jun 30, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Chino, CA · serves California
- Phone
- (909) 703-7196
- Listing
- Built from public records. Not claimed yet, so call them directly.
Luby T Construction
Riverside, CA · WC exempt · 10 mi away
Proof for Luby T Construction
- License
- CSLB 860194
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- A General Engineering; B General Building; C10 Electrical; C36 Plumbing; C51 Structural Steel; D28 Doors, Gates and Activating Devices
- Expires
- Jun 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Riverside, CA · serves California
- Phone
- (951) 565-6355
- Listing
- Built from public records. Not claimed yet, so call them directly.
Luxa David
Norco, CA · WC exempt · 8 mi away
Proof for Luxa David
- License
- CSLB 995392
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C10 Electrical; C36 Plumbing; C38 Refrigeration
- Expires
- Aug 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Norco, CA · serves California
- Phone
- (714) 264-7511
- Listing
- Built from public records. Not claimed yet, so call them directly.
M C G Boilers Inc
Chino Hills, CA · WC ✓ · 10 mi away
Proof for M C G Boilers Inc
- License
- CSLB 811476
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C4 Boiler, Hot Water Heating and Steam Fitting; C36 Plumbing
- Expires
- Aug 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Chino Hills, CA · serves California
- Phone
- (909) 393-6576
- Listing
- Built from public records. Not claimed yet, so call them directly.
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