Water Heater Replacement in St. Augustine
Get fast, fair pricing from licensed local pros. Typical St. Augustine cost: $1.1k – $2.4k installed.
- Tank, gas
- $1.1k – $2.4k
- Tank, electric
- $850 – $2.2k
- Tankless, gas
- $2.6k – $5.2k+
- Heat pump hybrid
- $2.2k – $4.7k
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Water heater replacement cost by type.
Installed prices for St. Augustine, adjusted for local labor. Larger tanks and code upgrades move the number up.
In St. Augustine, replacing a water heater typically costs between $700 and $3,400, depending on the type and installation complexity. With many homes built around 1976, older plumbing and tight spaces can increase labor time. Local permits are required under the Florida Building Code, and an expansion tank is needed if a backflow preventer or pressure-reducing valve is present. The warm humid subtropical climate and warm winter inlet water make heat pump water heaters a strong fit, and the federal 25C tax credit can cover 30% of the cost up to $2,000 for qualifying models.
- Tank, 40–50 gal gasThe default for most US homes$1,050 – $2,400
- Tank, 40–50 gal electricNo venting required$850 – $2,200
- Tankless, gasEndless hot water, higher BTU gas line often needed$2,600 – $5,200+
- Hybrid heat pumpMost efficient, qualifies for federal credits$2,200 – $4,700
- Permit & disposalMost jurisdictions require it$45 – $300
* Cold-region homes may need extra insulation or larger tanks.
Water heaters in St. Augustine
U.S. Census ACS- Households
- 5,857
- Homeowners
- 3,844
- 49% own
- Median home value
- $355,400
- Median income
- $72,806
- Median home built
- 1976
- Housing units
- 7,915
With a median home built in 1976, many St. Augustine water heaters are at or past their 8–12 year lifespan — a common reason replacements spike here.
What’s different about St. Augustine.
Generic cost pages skip the things that actually decide your price and your unit’s lifespan here — local code, water, and the money you can claim back.
Recommended unit for St. Augustine
Given Florida’s humid subtropical climate and electric water heating, heat-pump (hybrid) is the sensible default for most St. Augustine homes. Warm incoming water means a tankless delivers its full flow with no cold-inlet penalty. A pro can confirm the right size and fuel for your home.
Sources: 2023 Florida Building Code, Plumbing, Eighth Edition (ICC) · EIA Florida State Energy Profile · Florida Heat Pump Rebates 2026 overview
What St. Augustine code requires
Replacing a water heater in St. Augustine follows Florida rules under the Florida Building Code, Plumbing (based on the International Plumbing Code, IPC). Here’s what applies statewide:
- PermitRequired
Pulled by your licensed plumber; covers gas/venting and the expansion tank.
- Seismic strappingNot required
No state strapping mandate — one less line on the bill.
- Expansion tankRequired on closed systems (backflow preventer or PRV present)
Required where a pressure regulator or backflow preventer is present.
- Plumbing codeFlorida Building Code, Plumbing (based on the International Plumbing Code, IPC)
- Good to know—
Water heaters require a drip/safety pan with drain when located in or above living space, plus a TPR valve discharging to within 6 inches of the floor.
Sources: 2023 Florida Building Code, Plumbing, Eighth Edition (ICC) · EIA Florida State Energy Profile · Florida Heat Pump Rebates 2026 overview
Not sure which rules and rebates apply to your home?
A licensed St. Augustine pro will walk you through code, the right unit, and what you can claim back — in one quick call.
No obligation — talk through your options.
Money back in St. Augustine
Florida water heating is mostly electric, which shapes the money back:
- Federal30% of cost, up to $2,000Federal 25C tax credit →
For a qualifying ENERGY STAR heat pump water heater. Claimed on your federal return.
The federal 25C tax credit (30%, up to $2,000 for a qualifying heat pump water heater) applies in every state, including Florida.
Ready to get your water heater fixed in St. Augustine?
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- Same-day availability
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- Local pros near you
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- 1
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- 2
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- 3
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Water Heater Replacement in St. Augustine, explained.
What affects water heater replacement cost in St. Augustine?
Prices vary by unit type: tank gas $700–$1,700, tank electric $750–$1,900, tankless $1,300–$3,000+, heat pump $1,550–$3,400. Older homes (median built 1976) may require code upgrades like a drip pan with drain if the heater is in or above living space, and a TPR valve discharge line within 6 inches of the floor. Labor rates reflect local cost of living, and permit fees add $50–$150.
Common water heater issues in St. Augustine homes
Sediment buildup from hard water
St. Augustine's water can be hard, causing sediment to accumulate in the tank, reducing efficiency and lifespan. Flushing annually helps.
Corrosion in older tanks
With many homes built in the 1970s, older water heaters may have rusted tanks or anode rods, leading to leaks or failure.
Improper TPR valve discharge
Local code requires the TPR valve to discharge within 6 inches of the floor. Improper setups are common in older installations and must be corrected during replacement.
Water Heater Replacement FAQs — St. Augustine
Yes, a permit is required from St. Johns County for water heater replacement. The work must comply with the Florida Building Code, Plumbing.
Water Heater Replacement near St. Augustine
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