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TRUSTED BY ALTADENA, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon1.2k+
    Verified plumbing services reviews

Find Plumbers in Altadena

Avatar for G M C Plumbing, Inc.
G M C Plumbing, Inc.
4.9(
86
)
Faucets, Fixtures and Pipes - Repair or ReplaceDrain Clog or Blockage - ClearShower Install or Replace+13 more

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"We have worked with many plumbers in Los Angeles, and our experience with GMC Plumbing was by far the best. They are responsive, honest and trustworthy. They did a great job and helped us avoid paying the thousands of dollars other plumbers told us would be needed to fix the problem. We highly recommend them"
New Drainage
Old  shower Drainage
New kitchen faucet
New Drainage
New Drainage- SEWER LINE

+3

Response time5 hrs
Response rate97%
12 neighbors recently requested a quote
Avatar for So-Cal Plumbing & Rooter
So-Cal Plumbing & Rooter
4.7(
233
)
Drain Clog or Blockage - ClearWater Heater - Install or ReplaceWater Main - Install, Replace or Repair+13 more

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1998

Free estimates

Emergency services offered

"I had an excellent experience with Top Line Plumbing on 11/26. Jose was extremely knowledgeable, hardworking, and honest. He approached our plumbing issue with professionalism and provided clear explanations every step of the way. His expertise and dedication truly set him apart. I highly recommend Top Line Plumbing for anyone in need of reliable and skilled service! Michelle M"
One of our truckers
Our Jetter
Wotking hard for our clients
New Drainage Completed
New Clean-out Patch

+4

Response time4 hrs
Response rate95%
115 neighbors recently requested a quote
Avatar for Patrick Morrissey
Patrick Morrissey
5.0(
12
)
Bathtub Install or ReplaceDrain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For Business+15 more

Serving Altadena, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Patrick and Mitch came out right away to look at my plumbing needs. Sent links to possible replacement faucets to choose from. This is a family owned business which I love. Have no hesitations about using them again or referring them to my friends and family."
Replace Pipes
Cut to place
Fitting pipes
New pipe under sink
Clogged bath

+8

Response time1 hour
Recommended by100%of homeowners
Avatar for John's Plumbing and Drain Services
John's Plumbing and Drain Services
4.7(
47
)
Drain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For BusinessDrain Line Breakage - Camera Locate+22 more

Serving Altadena, CA and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"John was very responsive. I called in the middle of the day, he listened to the issue I was having, and he sent his tech, Victor, to my home that same day. Victor was prompt, very professional and knowledgeable. He needed to replace the components inside my toilet tank and fix the shut-off valve to the toilet. He had everything he needed, was able to get the job done quickly, and I could tell the work was quality. I will definitely call John and Victor again for any plumbing needs. I'm relieved to have found them as I've struggled with finding plumbers that are prompt and responsive!"
Plumbing Project
Pressure Regulator Valve Replacement BEFORE Job is Performed Atwater Village LA
Sprinkler valve Installation needed. Before. Hyperon Ave Los Angeles, CA
AFTER nstallation
BEFORE

+125

Response time6 hrs
Recommended by76%of homeowners
Avatar for Dynamite Plumbing
Dynamite Plumbing
4.7(
77
)
Faucets, Fixtures and Pipes - Repair or ReplaceDrain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For Business+19 more

Serving Altadena, CA and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Let me tell you its hard to find a good Plumbing contractor . I think we did. He showed up on time, Finish the job and the price was very reasonable. . He didn't leave a mess for us to clean up. We now have found a plumber we can trust and will I hire again."
Testing
Connections
Trenchless Pipe Replacement
Clay sewer
Existing cleanout

+10

Response time10 hrs
Response rate87%
6 neighbors recently requested a quote
Avatar for L.A. Plumbing Pros
L.A. Plumbing Pros
4.7(
95
)
Water Main - Install, Replace or RepairWater Heater - Install or ReplaceTankless Water Heater - Repair+6 more

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Free estimates

Emergency services offered

"I recently had a gas leak scare and called L.A. Plumbing pros. He was fantastic! The plumber who came out his name was Victor he was professional, communicative, and very efficient. He was able to quickly locate the source of the gas leak and explained everything clearly throughout the process. I felt confident in his expertise and appreciated his willingness to answer all my questions. The repair itself was done promptly and the work area was left clean afterwards. I highly recommend L.A. Plumbing pros for any plumbing needs, especially if you suspect a gas leak. Their fast response, clear communication, and quality service were all top-notch!"
Remodel
Reroute irrigation valves
50 gallon water heater
Water pressure regulator
Remodel

+25

Response time3 hrs
Response rate95%
7 neighbors recently requested a quote
Avatar for Leon Plumbing
Leon Plumbing
4.8(
73
)
Water Heater - Install or ReplaceTankless Water Heater - InstallTankless Water Heater - Repair+8 more

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1983

Free estimates

Emergency services offered

"It is so nice when you can find a plumbing company that you can trust. We had a clogged drain and called Leon Plumbing after I had gotten their number a while ago. I am glad I had kept the number. The plumber came on time, very professional and friendly. Made sure that he covered every part where he was working so it would not get wet or dirty. He explained everything he was doing and even gave advice on what we can do so we dont need to call a plumber often. Their estimate was fair and the final cost was within the estimate."
Tankless Installation (RUR199e with wifi)
Exterior Tankless Water Heater
Dual Tankless Water Heater Installation
Tankless water heater ACE PRO
Tankless Water Heater Service

+8

Response time8 hrs
Response rate94%
23 neighbors recently requested a quote
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Showing 1-10 of 898
Plumbing questions, answered by experts

Sloped foothill terrain in Altadena adds significant complexity to plumbing work, especially for trenching and gravity-fed drain lines. Older properties built between the 1920s and 1960s feature outdated galvanized steel or cast iron pipes that require extensive replacement. Determine if your property uses a private septic system or connects to the county sewer before starting. Finally, elevated mineral content in the local water supply causes scale buildup inside pipes and water heaters.

Helpful?

For plumbing in CA, choose scale-resistant materials that withstand the area's hard water. State law requires low-flow toilets, showerheads, and faucets for all permitted upgrades. You must use flexible connectors for gas appliances and install approved seismic strapping on water heaters to meet strict earthquake safety codes. Additionally, select underground piping designed to handle ground movement caused by the region's expansive foothill soils. All fixtures must meet strict state lead-free standards.

Helpful?

As the homeowner of record in Altadena, you must authorize all permit applications for plumbing work. You hold responsibility for the sewer lateral line connecting your house to the public main, making any repair or replacement decisions your choice. Select low-flow fixtures that fit your style and accessibility needs. You must also decide whether to upgrade to a heat pump or solar water heater to comply with strict energy codes.

Helpful?

Homeowners in CA frequently underestimate the time required for county permit approvals and final inspections. Opening walls for plumbing repairs often reveals outdated galvanized or lead pipes that demand full replacement. Tree roots easily invade older sewer laterals, creating immediate repair needs. Replacing a water heater also triggers mandatory code upgrades, including seismic strapping and expansion tank installations. Always account for underground utility locating delays before digging on hillside lots.

Helpful?

Address active leaks immediately to prevent rapid mold growth in older Altadena homes. Missing flexible connectors on gas lines or water heaters pose severe life-safety hazards and require urgent attention. Slow drains or sewage odors signal failing sewer laterals that demand immediate camera inspections. Schedule non-urgent exterior plumbing during the dry season to avoid trenching complications. Replace water heaters older than eight years promptly before hard water sediment causes complete failure.

Helpful?

The Altadena, CA homeowners’ guide to plumbing services

From average costs to expert advice, get all the answers you need to get your job done.