How long does a water heater replacement take?

A like-for-like tank swap typically takes 3–4 hours, including haul-away of the old unit, often the same day you call, depending on parts and scheduling. Tankless conversions take about a full day because of gas line and venting work. Either way, you get hot water back on a defined schedule, not "sometime this week."

Tank or tankless: which is right for my home?

Tanks cost less up front and are the fastest like-for-like swap. Tankless units cost more to install but deliver endless hot water, cut energy use roughly 25–30%, and last about twice as long. We size both options for your home’s demand and quote them side by side, no pressure either way.

Do you offer same-day or emergency water heater service?

Yes. We answer 24/7 and dispatch the first available professional plumbing technician for emergencies. If your tank is actively leaking, shut off the cold-water inlet on top of the unit (and the gas or breaker), then call (805) 410-9197, we’ll walk you through it.

Cold shower this morning?

Water Heater Repair & ReplacementServing Ventura County, the Conejo Valley & the San Fernando Valley

Q: Do I need a permit to replace a water heater in California?

Yes, California requires a permit for water heater replacement, plus code items like seismic straps, a proper T&P discharge line, and often an expansion tank. When permitting is included in your approved scope, we coordinate the permit and inspection and handle the required code items.

Tank or tankless: we offer prompt water-heater service and complete many common repairs and replacements the same day, depending on parts, equipment, scheduling, and job conditions. Upfront flat-rate quote before any work, code-compliant installs, and the old unit hauled away.

5.0 rating on

Call (805) 410-9197 Get a FREE Estimate

Prompt Service Licensed & Bonded · #1127602 Tank & Tankless Free Estimates

Gas water heater installed by Best Coast Plumbing with a new flex gas line, seismic straps, and drip pan

Tank & Tankless Installs

Code-Compliant · Prompt Service

BBB Accredited Click for profile

CA Licensed & Bonded Lic. #1127602 · Insured

24/7

24/7 Emergency Prompt water heater service

5.0 Star Average Verified customer reviews

Straight Answers First

Should You Repair or Replace Your Water Heater?

Whether repair or replacement makes sense depends on the unit’s age, condition, maintenance history, warranty status, and repair cost. A newer unit with a single failed part is often worth repairing, while a unit that is 10+ years old, leaking from the tank itself, or producing rusty water is usually a candidate for replacement. We evaluate the system, price both options flat-rate, and you choose.

Best Coast Plumbing repairs and replaces gas, electric, and tankless water heaters across Ventura and Los Angeles County, often the same day you call, depending on parts and scheduling. Every visit starts with a free estimate and an exact flat-rate price you approve before any work begins.

California installs also have code requirements most homeowners don’t know about: a permit, seismic straps, a T&P discharge line, and often an expansion tank. When permitting is included in your approved scope, we coordinate the permit and inspection and handle the required code items, and the old unit gets hauled away. All work is performed under our California C-36 plumbing contractor’s license (CSLB #1127602).

Content reviewed by a C-36 licensed plumbing contractor · CA Lic. #1127602 · Updated August 2026

Signs your water heater needs attention

Water won’t get hot, or runs out fast

Rusty or rotten-egg-smelling hot water

Rumbling or popping sounds from the tank

Water pooling around the base

Pilot light won’t stay lit

Unit is 10+ years old

This Service at a Glance

Response

Prompt service · 24/7 for emergencies

Typical Duration

Repairs 1–2 hrs · Swaps 3–4 hrs

Brands We Service

Rheem, Bradford White, AO Smith, Navien, Rinnai & more

Warranty

Manufacturer warranty varies by brand and model + our labor warranty

Estimates

Free onsite estimates (standard hours)

Book Your Free Estimate

What’s Included

Every common water heater problem, and every upgrade path, handled by one team, under our California C-36 license.

Repairs We Handle

No hot water, or not enough of it

Pilot light & thermocouple replacement

Heating elements & thermostats (electric)

Gas control valve & burner repairs

Leaking T&P relief valves & fittings

Sediment flush & anode rod service

Tankless error codes & descaling

Replacement & Upgrades

Like-for-like tank swaps (40–75 gal)

Tankless conversions, sized to your home

Tankless upgrades, rebate-eligible when applicable

Seismic straps, expansion tanks & code items

Permit coordination when included in the approved scope

Recirculation pumps for instant hot water

Old unit haul-away & clean workspace

What to Expect

Four steps from “no hot water” to “all fixed”, with many common repairs and replacements completed in one visit.

Call or book online

Tell us what’s happening. We triage over the phone (if the tank is leaking, we’ll help you find the shutoff when it’s safe and practical) and schedule prompt service.

Diagnosis & flat-rate quote

A professional plumbing technician evaluates the unit, explains repair vs. replace honestly, and you approve an exact price before any work starts.

Repair or install

Floors protected, water heater in, old unit hauled away, often the same day, depending on parts and scheduling.

Test, walkthrough & warranty

Full temperature and leak test and a code walkthrough of straps and valves.

24/7

Tank leaking right now?

Shut off the cold-water inlet on top of the unit and call us for 24/7 emergency availability.

Call (805) 410-9197

Navien tankless water heater installed by Best Coast Plumbing with new copper and gas lines

Why Best Coast

Why Homeowners Call Us for Hot Water

Hot water back fast

Common parts and standard tanks are usually available quickly, and many repairs and swaps finish in one visit.

Code-compliant installs

Seismic straps, expansion tanks, and venting handled, with permits coordinated when included in your approved scope.

Major brands, gas and electric

Gas, electric, and tankless: we repair what you have and install what fits.

Warranty-backed, upfront pricing

Flat-rate quote before work begins, manufacturer warranty varies by brand and model, plus our labor warranty.

Get a FREE Estimate

Every job is backed by our Done-Right Guarantee.

Water Heater Jobs, Reviewed

Real water heater calls, straight from our Google and Yelp pages.

“Brendan came to do an annual service of our tankless heater and to replace a hose bib. He was proficient, polite and extremely well organized. His pricing was more than fair.”

Dan S. · Encino

“We’ve used Best Coast Plumbing for our water heater and cleaning out of sink drains. Nicest, fastest and best plumber!”

Erika K.

“They were punctual, communicative, and thorough when repairing a pipe, installing a new water heater, and installing a leak detector in my house. Would definitely contact them again.”

A. N.

Related Plumbing Services

Water heater problems often travel with these, one crew handles it all.

Gas Line Repair & Replacement

Gas water heater upgrades often need a new code-compliant gas run, we do both in one visit.

Learn more →

Water Line Repair & Repiping

Rusty water isn’t always the heater, aging galvanized supply lines get diagnosed on the same call.

Learn more →

Emergency Plumbing

Burst tank flooding the garage? 24/7 emergency response, with a real person answering day or night.

Learn more →

Water heater service near you:

Thousand Oaks Westlake Village Newbury Park Simi Valley Camarillo Woodland Hills Calabasas

All service areas →

Water Heater FAQs

Quick answers to what homeowners ask us most about water heaters.

It depends on which component failed, so every visit starts with a free on-site diagnosis and an exact flat-rate quote you approve before work begins. You know the full price before anything gets done, and if you choose to replace the unit instead, the diagnosis costs nothing.

Still have a question? Call (805) 410-9197, we’re happy to help.

Get a Free Estimate

Book your free onsite estimate online in about a minute, or call and a real person picks up. We answer 24/7.

Get a FREE Estimate Call (805) 410-9197

Free, no-obligation estimates Financing available on approved credit Upfront flat-rate pricing Licensed & Bonded · #1127602

Brendan Lee, Founder

Best Coast Plumbing

Ready for reliable hot water?

Call now for prompt water heater service, or request your free estimate online. No pressure, no hassle. Just the Best.

Call (805) 410-9197 Get a FREE Estimate