you asked:
Plumbers in Diamond Bar, CA
30 plumbers in Diamond Bar, CA. Every listing checked against the issuer's record, in the published order.
Grace Rooter and Plumbing
Ontario, CA · WC exempt · 9 mi away
Proof for Grace Rooter and Plumbing
- License
- CSLB 817808
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Mar 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Ontario, CA · serves California
- Phone
- (626) 827-2720
- Listing
- Built from public records. Not claimed yet, so call them directly.
Graham Plumbing and Drain Cleaning Inc
Brea, CA · WC ✓ via leasing firm · 5 mi away
Proof for Graham Plumbing and Drain Cleaning Inc
- License
- CSLB 997050
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Sep 30, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Covered through an employee leasing firm
- Where
- Brea, CA · serves California
- Phone
- (888) 828-3872
- Listing
- Built from public records. Not claimed yet, so call them directly.
Green Eco Construction Inc
Covina, CA · WC ✓ · 6 mi away
Proof for Green Eco Construction Inc
- License
- CSLB 1063673
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C36 Plumbing
- Expires
- Feb 29, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Covina, CA · serves California
- Phone
- (323) 873-9130
- Listing
- Built from public records. Not claimed yet, so call them directly.
Guardian Angel Plumbing Inc
Chino, CA · WC ✓ · 8 mi away
Proof for Guardian Angel Plumbing Inc
- License
- CSLB 1033885
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C36 Plumbing
- Expires
- Dec 31, 2026
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Chino, CA · serves California
- Phone
- (562) 274-8867
- Listing
- Built from public records. Not claimed yet, so call them directly.
H & C Plumbing
San Dimas, CA · WC ✓ · 7 mi away
Proof for H & C Plumbing
- License
- CSLB 1068130
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Aug 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- San Dimas, CA · serves California
- Phone
- (626) 394-6200
- Listing
- Built from public records. Not claimed yet, so call them directly.
H D Production Plumbing Contractors Inc
Covina, CA · WC ✓ · 6 mi away
Proof for H D Production Plumbing Contractors Inc
- License
- CSLB 817184
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Feb 28, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Covina, CA · serves California
- Phone
- (626) 966-2884
- Listing
- Built from public records. Not claimed yet, so call them directly.
H L Construction
LA Puente, CA · WC exempt · 7 mi away
Proof for H L Construction
- License
- CSLB 1006290
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C36 Plumbing
- Expires
- Aug 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- LA Puente, CA · serves California
- Phone
- (626) 363-3872
- Listing
- Built from public records. Not claimed yet, so call them directly.
H R Plumbing
Pomona, CA · WC ✓ · 7 mi away
Proof for H R Plumbing
- License
- CSLB 398698
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
- Expires
- Jan 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Pomona, CA · serves California
- Phone
- (323) 394-2411
- Listing
- Built from public records. Not claimed yet, so call them directly.
Harbor Pointe Air Conditioning & Control Systems Inc
Placentia, CA · WC ✓ · 9 mi away
Proof for Harbor Pointe Air Conditioning & Control Systems Inc
- License
- CSLB 683516
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C4 Boiler, Hot Water Heating and Steam Fitting; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C38 Refrigeration
- Expires
- Dec 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Placentia, CA · serves California
- Phone
- (657) 275-9188
- Listing
- Built from public records. Not claimed yet, so call them directly.
Harmon Plumbing
LA Habra, CA · WC exempt · 9 mi away
Proof for Harmon Plumbing
- License
- CSLB 420539
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Nov 30, 2026
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- LA Habra, CA · serves California
- Phone
- (562) 943-4399
- Listing
- Built from public records. Not claimed yet, so call them directly.
Harry Pro Services
Fullerton, CA · WC ✓ · 9 mi away
Proof for Harry Pro Services
- License
- CSLB 764272
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C4 Boiler, Hot Water Heating and Steam Fitting; C7 Low Voltage Systems; C10 Electrical; C16 Fire Protection; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing; C38 Refrigeration; D28 Doors, Gates and Activating Devices
- Expires
- Jun 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Fullerton, CA · serves California
- Phone
- (714) 240-0500
- Listing
- Built from public records. Not claimed yet, so call them directly.
Hartman Plumbing Services
Covina, CA · WC ✓ · 7 mi away
Proof for Hartman Plumbing Services
- License
- CSLB 1027891
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Jun 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Covina, CA · serves California
- Phone
- (626) 482-5161
- Listing
- Built from public records. Not claimed yet, so call them directly.
Haven Electric & Plumbing Inc
Rowland Heights, CA · WC ✓ · 5 mi away
Proof for Haven Electric & Plumbing Inc
- License
- CSLB 1083739
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- B General Building; C10 Electrical; C36 Plumbing
- Expires
- Mar 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Rowland Heights, CA · serves California
- Phone
- (562) 447-3977
- Listing
- Built from public records. Not claimed yet, so call them directly.
Here to Help Plumbing & Rooter
Glendora, CA · WC ✓ · 8 mi away
Proof for Here to Help Plumbing & Rooter
- License
- CSLB 1116916
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Feb 29, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Glendora, CA · serves California
- Phone
- (626) 664-0651
- Listing
- Built from public records. Not claimed yet, so call them directly.
High Performance Plumbing
Chino, CA · WC exempt · 8 mi away
Proof for High Performance Plumbing
- License
- CSLB 569436
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- May 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Exempt: no employees
- Where
- Chino, CA · serves California
- Phone
- (951) 712-6557
- Listing
- Built from public records. Not claimed yet, so call them directly.
High Quality Hce
Rowland Heights, CA · WC ✓ · 5 mi away
Proof for High Quality Hce
- License
- CSLB 1002825
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing
- Expires
- Apr 30, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Rowland Heights, CA · serves California
- Phone
- (626) 378-6171
- Listing
- Built from public records. Not claimed yet, so call them directly.
High Speed Plumbing Inc
Pomona, CA · WC ✓ · 7 mi away
Proof for High Speed Plumbing Inc
- License
- CSLB 997843
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Oct 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Pomona, CA · serves California
- Phone
- (626) 890-0185
- Listing
- Built from public records. Not claimed yet, so call them directly.
High Speed Rooter and Plumbing Inc
Ontario, CA · WC ✓ via leasing firm · 9 mi away
Proof for High Speed Rooter and Plumbing Inc
- License
- CSLB 1017796
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- A General Engineering; C10 Electrical; C20 Warm-Air Heating, Ventilating and Air-Conditioning; C36 Plumbing; C42 Sanitation System
- Expires
- Aug 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Covered through an employee leasing firm
- Where
- Ontario, CA · serves California
- Phone
- (213) 949-4202
- Listing
- Built from public records. Not claimed yet, so call them directly.
Hoag Nick
Covina, CA · WC ✓ · 8 mi away
Proof for Hoag Nick
- License
- CSLB 1038859
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- May 31, 2028
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Covina, CA · serves California
- Phone
- (714) 760-8084
- Listing
- Built from public records. Not claimed yet, so call them directly.
Holguins Plumbing & Rooter Inc
Chino, CA · WC ✓ · 8 mi away
Proof for Holguins Plumbing & Rooter Inc
- License
- CSLB 929015
- Issuer
- California Contractors State License Board
- Status
- Active
- Class
- C36 Plumbing
- Expires
- Oct 31, 2027
- Checked
- Oct 24, 2026
- Workers' comp
- Workers' comp on file
- Where
- Chino, CA · serves California
- Phone
- (909) 821-2361
- Listing
- Built from public records. Not claimed yet, so call them directly.
More cities in California
Free for people · nobody pays to rank. Run one of these businesses? Claim it free.