Mike Diamond Services

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.