Mike Diamond Plumbing, HVAC & Electrical

Company Facts

Mike Diamond Plumbing, HVAC & Electrical at a Glance

By the numbers

Google rating

4.6out of 5

Customer reviews

172on Google

In business

50years

Rating and review count pulled from Google on September 4, 2026. Years counted from 1976.

What We Like

• Covers plumbing, electrical and heating and cooling, so multi-trade jobs stay with one contractor
• 4.6 from 172 reviews on its Google Business Profile as of September 4, 2026
• Trading since 1976 according to its own website, with a Hollywood-adjacent base on N Cahuenga Blvd
• Deep plumbing list including sewer replacement, slab leak detection, gas lines and tankless water heaters
• Membership plans and financing options for larger replacements

Things to Consider

• Google hours show weekdays 7 AM to 4 PM and closed weekends, while the website advertises 24/7 emergency service on a different number
• Review count is modest for a company of this age, so read the most recent feedback
• Larger branded operations often price above owner-operator independents on simple repairs
• Pricing model, diagnostic fees and after-hours charges are not published and need confirming by phone

Google rating

4.6

Based on 172 Google reviews

Review data updated September 4, 2026

View on Google Maps →

Rating Distribution

• 5 stars87%
• 4 stars3%
• 3 stars1%
• 2 stars2%
• 1 star6%

Three trades in one company changes how a job gets handled. A water heater that keeps tripping its breaker, a bathroom remodel that needs supply lines and a new circuit, an air conditioner that fails because of a wiring fault rather than refrigerant: those are the situations where mike diamond plumbing hvac electrical makes sense as a single call rather than three separate contractors blaming each other. The service list on the company website is broad, spanning emergency plumbing, pipe repair and replacement, sewer repair and replacement, garbage disposals, water filtration, gas line installation, leak detection including slab leaks, water heaters both tanked and tankless, electrical panel and fuse box service, home rewiring, troubleshooting, plus AC and furnace repair, installation and tune-ups.

Los Angeles housing gives all three of those departments plenty to do. Hillside properties in the Hollywood Hills and Los Feliz, close to the Cahuenga Boulevard base, often have long runs of aging galvanised pipe, awkward crawl space access and water pressure that varies with elevation. Post-war tracts across the Valley sit on slabs, which is why slab leak detection is a standing line item for any serious LA plumber rather than a niche service. Older bungalows in Mid City and Highland Park frequently still run 60 or 100 amp panels that cannot carry a modern kitchen, a heat pump and an EV charger at once, and the panel upgrade conversation usually starts with an LADWP coordination and a city permit. Clay sewer laterals under mature street trees in the flats crack and fill with roots on a predictable cycle, which is where camera inspection and either spot repair or full lateral replacement come in.

The day to day, as the company presents it, leans on fully stocked trucks so that common repairs finish on the first visit. It also sells membership plans covering plumbing, heating and air conditioning, and lists financing, which points at a business set up for larger replacements as much as small repairs. That model tends to work best for homeowners who want a scheduled technician, a written quote before work begins and a company that will still be reachable in two years for a warranty question. It works less well for landlords chasing the cheapest per-unit fix, or for anyone who prefers to negotiate directly with an owner-operator.

On reputation, the numbers are worth reading carefully. The Google Business Profile shows 4.6 from 172 reviews as of September 4, 2026, which is a solid score for a high-volume home services company where a single unhappy install can pull an average down. That review count is modest relative to how long the business says it has traded, so it is worth reading recent reviews specifically, and looking at whether complaints cluster around pricing, scheduling or workmanship.

One thing to clarify at the point of booking is availability. The hours published on the Google listing run 7 AM to 4 PM Monday through Friday with the weekend closed, while the website advertises round the clock emergency service on a separate toll-free number. Those two things can both be true, with the local office keeping business hours and a central dispatch handling nights, but ask directly if you are calling on a Sunday with a burst line. Also ask what the after-hours call-out charge is, whether diagnostic fees are credited against the repair, and how the company prices, flat rate per job or by the hour, because that single answer changes what a quote means.

A few other questions earn their keep. For any repipe or sewer replacement, ask who pulls the permit and who handles the city inspection, and get the pipe material specified in writing. For a panel upgrade, confirm the amperage, whether the meter socket and service drop are included, and who schedules the utility disconnect. For a tankless water heater, ask about gas line sizing and venting, since undersized gas supply is the usual reason an install disappoints. And for HVAC, ask whether the load was calculated or the new unit simply matched to the old one.

Compared with the wider Los Angeles market, mike diamond plumbing hvac electrical sits with the larger branded operations rather than the two-van independents. You generally trade a somewhat higher ticket for dispatch capacity, uniformed technicians, financing options and a company with a paper trail. Whether that trade is worth it depends on the job. For a dripping angle stop, probably not. For a sewer lateral, a service upgrade or a system changeout, it usually is.

Project Videos

From the company's own channel and website. Loads only when you press play.

About This Business Profile

Last reviewed

September 2026

Profile last updated

September 18, 2026

Google review data updated

September 4, 2026

Reviewed by

Dana Whitfield, Senior editor, home services

Sources checked

Google Business Profile, Company website

Sponsorship status

No commercial relationship