How much does water heater installation cost in Concord?

Tank water heater installation typically runs $900–$1,800 depending on unit size, fuel type, and any required code upgrades. Tankless systems start around $1,800–$3,500 installed. We give you a fixed price before any work starts — no surprises.

How long does water heater installation take?

A standard tank replacement is usually done in 2–3 hours. Tankless installations take 3–5 hours, longer if gas line upgrades or new venting are needed. We give you a realistic timeline upfront.

Do I need a permit for water heater replacement in Concord?

Yes — Contra Costa County requires a permit for water heater replacements. We handle the permit process for you. It protects your home, your warranty, and your insurance coverage.

Tank vs. tankless — which is right for my home?

Tank heaters cost less upfront and are simpler to install. Tankless units cost more initially but last twice as long, use less energy, and deliver endless hot water. For households of 3+ people with consistent hot water demand, tankless often pays off within 5–7 years. We'll walk you through the numbers for your specific situation.

What size water heater do I need?

For tank heaters: 40 gallons for 1–3 people, 50 gallons for 3–4, 75–80 gallons for larger households. For tankless: sizing depends on flow rate demand (simultaneous showers, dishwasher, etc.), not gallons. We calculate the right size during the assessment.

Do you haul away the old water heater?

Yes. Removal and disposal of your old unit is included in our installation price. We don't leave you with a tank on the garage floor.

Is same-day water heater installation available?

Often, yes — especially for standard tank replacements where we have the unit in stock or can source it locally. Call us at (925) 288-0409 and we'll tell you what's available today.

Water heater installation
in Concord & the Bay Area.

The right unit. A fixed price. Done right the first time.

Whether you're replacing a failing tank, upgrading to tankless, or installing for the first time — we assess your home's needs, handle the permits, and complete most installs the same day.

HTP water heater installed in mechanical room with copper hydronic system — Guerra Bros. Plumbing

Same-day available
Most tank replacements done same visit.
Tank, tankless & heat pump
All system types, all major brands.
Permits handled
We pull Contra Costa County permits for you.
CA Lic. #802256
Licensed, insured, family-owned since 2001.

1 / 5

“Replaced our 15-year-old water heater in under 3 hours. Fair price, showed up on time.”

Patricia L.

Concord, CA · Google

What We Install

Every system type.
Every major brand.

We install gas and electric tank heaters, tankless on-demand systems, and heat pump (hybrid) units. We source units from A.O. Smith, Rheem, Bradford White, Rinnai, Navien, and more — or we can install a unit you've already purchased.

Need a repair instead?

Gas tank heaters

Electric tank heaters

Tankless gas

Heat pump (hybrid)

Expansion tanks

Permit handling

All major brands

Haul-away included

How It Works

From assessment
to hot water, same day.

Step 1:
Assess & Recommend
We evaluate your current setup, household size, and water usage to recommend the right unit and size — no upselling, just the right fit.
Step 2:
Fixed Price Quote
You choose the unit. We give you a written, fixed price before any work starts — parts, labor, permits, and haul-away of the old unit included.
Step 3:
Licensed Install
Proper venting, supply, and drain connections. Permits pulled where required. We install to code — so your warranty and insurance stay intact.
Step 4:
Test & Walk-Through
We pressure test, verify temperature and T&P relief, and walk you through the new system before we close the job. You leave knowing how it works.

Guerra Bros. Plumbing technician reviewing an invoice with a homeowner in the kitchen

Choose the Right Unit

Tank, tankless, or heat pump?
We'll help you decide.

Which system fits your home?

The right choice depends on your budget, household size, and space.

Tank — Gas

Most common

$900–$1,600 installed

Lowest upfront cost
Simple installation
40–80 gallon sizes
Works in power outages
Standby heat loss
Limited lifespan (8–12 yrs)

Tankless — Gas

Best value long-term

$1,800–$3,200 installed

Endless hot water
Lasts 20+ years
Lower energy bills
Space-saving
Higher upfront cost
May need gas line upgrade

Heat Pump (Hybrid)

Rebates available

$1,500–$2,800 installed

Most energy efficient
IRA rebates available
Cools surrounding area
Needs 1,000 sq ft space
Not for cold spaces

Signs it's time to replace

Don't repair a unit that's past its useful life.

Unit is 12+ years old
Recurring repairs adding up
Rust-colored hot water
Tank body is leaking
Rumbling or sediment buildup
Energy bills climbing unexpectedly

FAQ

Common questions

Everything homeowners ask before scheduling an install.

: Tank water heater installation typically runs $900–$1,800 depending on unit size, fuel type, and any required code upgrades. Tankless systems start around $1,800–$3,500 installed. We give you a fixed price before any work starts — no surprises.
: A standard tank replacement is usually done in 2–3 hours. Tankless installations take 3–5 hours, longer if gas line upgrades or new venting are needed. We give you a realistic timeline upfront.
: Yes — Contra Costa County requires a permit for water heater replacements. We handle the permit process for you. It protects your home, your warranty, and your insurance coverage.
: Tank heaters cost less upfront and are simpler to install. Tankless units cost more initially but last twice as long, use less energy, and deliver endless hot water. For households of 3+ people with consistent hot water demand, tankless often pays off within 5–7 years. We'll walk you through the numbers for your specific situation.
: For tank heaters: 40 gallons for 1–3 people, 50 gallons for 3–4, 75–80 gallons for larger households. For tankless: sizing depends on flow rate demand (simultaneous showers, dishwasher, etc.), not gallons. We calculate the right size during the assessment.
: Yes. Removal and disposal of your old unit is included in our installation price. We don't leave you with a tank on the garage floor.
: Often, yes — especially for standard tank replacements where we have the unit in stock or can source it locally. Call us at (925) 288-0409 and we'll tell you what's available today.

Brands We Install

Customer Reviews

Don't take our
word for it.

All reviews on Google

Google

“They replaced our 15-year-old water heater in under 3 hours. Fair price, showed up on time, cleaned up after themselves. Couldn't ask for more.”

Google

“I highly recommend Guerra plumbing. Tony was professional, knowledgeable and solved all of the plumbing issues. He explained the causes of the problems and offered suggestions for prevention.”

Google