Find a plumber for
water heater installation.
Need a plumber for water heater installation or replacement? Compare systems and costs, then request a callback about the work in your home.
Compare the work and request a quote for your home. Provider availability is confirmed separately.
Choosing a heater?
Compare tank, tankless and heat pump systems against your home.
Compare the optionsComparing quotes?
Check the equipment, labour and building work before you compare totals.
Check the inclusionsSTART WITH THE JOB
A replacement
or a conversion?
Two similar-looking heaters can mean very different installation work.
A like-for-like replacement keeps the same broad heater type, fuel and location. An installer still needs to check the condition of connections, venting and required safety measures. A new appliance does not make an unsuitable installation compliant.
A conversion changes more: a tank to tankless, gas to electric, or a conventional tank to a heat pump. The quote may need electrical work, a gas-supply assessment, different venting, a condensate drain or a new location.
The useful first question
“What can stay as it is, and what must change for this particular model?” Ask for both parts in writing.
THREE WAYS TO HEAT WATER
Choose the fit.
Then choose the model.
A product's headline efficiency or capacity is only useful when it suits your home's demand and installation conditions.
Conventional tank
Stored hot water, ready for the busy hour.
- Worth considering
- A straightforward replacement where the existing fuel and space work well.
- Check first
- First-hour rating, recovery, physical dimensions, fuel connections and venting.
- Don't assume
- Two tanks with the same gallon capacity deliver the same amount of hot water.
Tankless
Heat water as it flows, with capacity limits.
- Worth considering
- When the installation can support the fuel or electrical demand and your hot-water pattern.
- Check first
- Output at winter inlet temperature, simultaneous fixtures, venting and supply capacity.
- Don't assume
- “Tankless” means instant hot water at every faucet or unlimited simultaneous flow.
Hybrid electric
Move heat from the surrounding air into water.
- Worth considering
- A location that meets the selected model's air, temperature, drainage and electrical requirements.
- Check first
- Airflow, service clearance, condensate route, sound, recovery and operating mode.
- Don't assume
- A small closet works without an approved airflow arrangement.
Sizing reference: ENERGY STAR criteria · Tankless capacity: Rinnai technical FAQ
WATER HEATER INSTALLATION COST
Start with a range.
Ask what it includes.
These are broad US planning ranges from published cost guides, not a quote for your address. Equipment, labour and local conditions can change the total.
40-50-gallon tank replacement$600-$3,100Broad installed planning range
Tankless installation$1,400-$5,600Conversions may involve additional work
Heat pump installation$3,200-$4,700Space, drainage and wiring matter
Published estimates: HomeGuide: tank and tankless · Angi: heat pump. Checked October 6, 2026. Angi also reports a wider $2,800-$8,000 range. Confirm the included scope; individual quotes can fall outside these bands.
Interactive calculator
Your water heater cost planner
Choose a system and identify work to discuss. You get a broad planning range and a practical checklist before sharing any contact details.
How this is calculated
The selected system determines the published range. Additional work creates questions to ask, not invented dollar add-ons. HomeGuide covers 40-50-gallon tanks and tankless installation. Angi highlights $3,200-$4,700 for heat pumps and also reports a wider $2,800-$8,000 range. Costs can fall outside these bands. Sources checked October 6, 2026. The model holds the published range constant; it does not price local labour, taxes, permits, upgrades or rebates.
ENERGY STAR sizing criteria · Published cost sources and assumptions
THE QUOTE CHECKLIST
Compare the work.
Not just the total.
An itemized quote makes it easier to spot a missing allowance before it becomes a surprise.
Prepare your installation enquiry →- 01
Exact equipment
Manufacturer, model, fuel, capacity and the household demand it is intended to meet.
- 02
Included installation work
Connections, valves, venting, gas, electrical and any required drain or condensate work.
- 03
Permits and inspection
Who checks the local rules, obtains permits, pays fees and arranges inspection?
- 04
Removal and access
Old-unit removal, disposal, protection of the work area and any difficult-access allowance.
- 05
Price, exclusions and support
Total price, taxes, excluded work, change-order process and separate equipment and labour warranties.
LOCAL REQUIREMENTS
The permit answer
starts at your address.
There is no single nationwide water-heater permit rule. Your building department can tell you which plumbing, gas or electrical permits apply and whether an inspection is required. A fuel change or relocation can follow a different path from a simple replacement.
In California, the 2025 Energy Code applies to permit applications submitted from January 1, 2026. Replacement rules depend on the home and installation. Check the current state guidance and your local department rather than relying on an old national checklist.
READ THE NEXT CHAPTER
A little preparation.
A better conversation.
Cost & scope
Gas vs. electric installation costs
See which connections can stay and which changes add work.
TimingHow long does installation take?
Separate the work on site from permits and delivery.
RequirementsDo you need a permit?
Know who to ask, what to confirm and what to keep.
Urgent replacementWhat to do when a heater fails
Put safety first, then ask about availability and scope.
Don't wait for an online enquiry.
If you suspect a gas leak, leave immediately and call 911 and your gas utility from a safe location. If a carbon-monoxide alarm sounds, move outside and call emergency services. Do not return until responders say it is safe.
HOW TO USE THIS GUIDE
Useful information.
Clear limits.
We compare published technical guidance, manufacturer information and installation considerations. We have not performed laboratory testing, and this website is not a plumbing contractor. An on-site assessment and the chosen model's installation manual take precedence over general guidance.
For a new installation in 2026, do not assume the former federal Energy Efficient Home Improvement Credit applies. The IRS says it is unavailable for property placed in service after December 31, 2025. State and utility rebates are separate programmes with their own eligibility rules.
Check the current IRS guidance · Read our research method · Replacement parts guide
Editorial review: October 6, 2026 · United States · USD
Water heater installation questions
Do I need a permit to replace a water heater?
Check the building department responsible for your address before work starts. A like-for-like replacement can still need a permit; relocation, fuel changes and new electrical work can follow different requirements.
Is a tankless water heater worth the higher installation price?
Compare the full installed price, household demand, energy rates and maintenance requirements. A conversion can need new venting, gas or electrical work. A suitable storage heater may be a better fit when conversion work is substantial.
Can I claim a federal heat pump water heater credit in 2026?
For a new 2026 installation, do not assume the former federal credit applies. The IRS says the Energy Efficient Home Improvement Credit is unavailable for property placed in service after December 31, 2025. State and utility rebates are separate programmes.
What changes a simple replacement into a bigger job?
A change in heater type, fuel, location or demand can require different venting, gas supply, wiring, drainage or access. Ask the installer to separate the equipment replacement from necessary building work in the quote.
What size water heater should I choose?
For storage heaters, compare first-hour rating with your busiest hour of use. For tankless models, compare flow at the required temperature rise. Household size helps frame the question but is not a complete sizing calculation.