Plumbing
Mike Diamond Services
Los Angeles, California
The company at a glance
Company overview
Mike Diamond Services is a Southern California home-services business offering plumbing, drain cleaning, water-heater work, heating, cooling, and electrical services. Its website lists several Los Angeles-area locations and advertises round-the-clock emergency service. The company’s founder history dates the start of the business to 1976. Services and locations; founder history.
A service call needs a clear scope
The breadth of the company’s services may be useful when a problem involves more than one household system. Start by explaining the symptoms and ask what the first appointment will establish. Confirm the diagnostic or dispatch charge, the authorization process, and whether the person visiting can complete the likely repair.
For drain and sewer work, ask which findings distinguish a blockage from a damaged pipe, whether camera inspection is included, and what evidence will be supplied before a larger repair is proposed. For water-heater replacement, ask the company to explain the complete installed scope and the costs that depend on conditions at the property.
Questions before booking
- Which local service location will handle the job, and what arrival window is available?
- Are emergency, diagnostic, or after-hours charges separate from the repair price?
- How will additional work be documented and approved before it starts?
The company identifies California license 399170 on its licensing page. Home Review Board checked the CSLB record for Mike Diamond Plumbing LLC, doing business as Mike Diamond Plumbing Heating & Air Conditioning. It was active on September 8, 2026 and included plumbing, HVAC, and electrical classifications. Company licensing information; CSLB record.
Services & specialties
Services, locations, history, and availability: Mike Diamond Services website. License identity, status, and classifications: CSLB, checked September 8, 2026.
Areas served
Confirm availability for your exact address directly with the company.
Licensing & credentials
California license: 399170
Check the official sourceServices, locations, history, and availability: Mike Diamond Services website. License identity, status, and classifications: CSLB, checked September 8, 2026.
- CSLB C-36 Plumbing, C-20 HVAC, and C-10 Electrical
- CSLB also lists C-16 Fire Protection and C-42 Sanitation System
- Active license status checked September 8, 2026
Home Review Board does not license contractors. A credential listing does not establish current status or suitability for a particular job.
Reputation research
Look at recent feedback, recurring themes, and how the company responds to concerns. A rating alone cannot establish the quality of a future project.
Third-party ratings and reviews are not reproduced here. Availability and content are controlled by the original platforms.
What homeowners should ask
- Which completed projects are most similar to mine?
- Who will supervise the work and communicate updates?
- What is included in the proposal, and what is excluded?
- How will changes to the scope, price, and schedule be approved?
- Which licenses, insurance, permits, and warranties apply to this project?
Before you get in touch
How do I request an estimate?
Use the company’s website or public phone number, where provided above. Ask about current availability and whether an estimate or site visit carries a fee.
Has Home Review Board verified every detail?
No. Review the source notes and any fields specifically identified as checked. Company-provided information is attributed separately. Confirm time-sensitive information before hiring.
Sources & review notes
Fields checked: Matched the website’s license number to Mike Diamond Plumbing LLC dba Mike Diamond Plumbing Heating & Air Conditioning. CSLB listed active status and C-36, C-20, C-16, C-10, and C-42 classifications. Checked website-listed services, customer phone, Los Angeles location, coverage, founding history, and advertised emergency availability. The Los Angeles address is a website-listed service location; CSLB lists a Culver City mailing address. Pricing, response times, insurance, and customer-review claims were not independently verified.
Source review date: 2026-09-08