Water Heater Installation in Irmo
Get fast, fair pricing from licensed local pros. Typical Irmo cost: $900 – $2.1k installed.
- Standard tank install
- $900 – $2.1k
- Tankless install
- $2.5k – $5.3k+
- New gas line run
- $300 – $1.1k
- Permit & inspection
- $45 – $300
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Water heater installation cost by job.
Installed-labor pricing for Irmo, adjusted for local rates. Relocations and gas-line upgrades add to the base.
Water heater installation costs in Irmo, SC, typically range from $700–$1,600 for a standard tank unit and $1,600–$4,000+ for a tankless system. With a median home age of 43 years, many homes may need updates to meet the current South Carolina Plumbing Code (2021 IPC). Permits are required for all water heater replacements in Irmo, and an expansion tank is mandatory if a backflow preventer or check valve is present. Given the humid subtropical climate and moderate winter inlet water, heat pump water heaters are a strong fit and qualify for the federal 25C tax credit (30% up to $2,000).
- Standard tank install (like-for-like)Same fuel, same location$900 – $2,100
- Tankless installationWall mount, new venting, larger gas line$2,500 – $5,300+
- Electric-to-gas conversionNew gas line + venting required$1,750 – $4,400
- New gas line runDistance and access drive cost$300 – $1,050
- Permit & inspectionRequired in most jurisdictions$45 – $300
* Relocating the unit or upsizing the gas line adds the most to a base install.
Water heaters in Irmo
U.S. Census ACS- Households
- 4,674
- Homeowners
- 3,690
- 73% own
- Median home value
- $168,200
- Median income
- $77,656
- Median home built
- 1983
- Housing units
- 5,037
With a median home built in 1983, many Irmo water heaters are at or past their 8–12 year lifespan — a common reason replacements spike here.
What’s different about Irmo.
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 Irmo
Given South Carolina’s humid subtropical climate and electric water heating, heat-pump (hybrid) is the sensible default for most Irmo homes. A pro can confirm the right size and fuel for your home.
Sources: South Carolina Plumbing Code 2021 (IPC 2021), Chapter 5 Water Heaters — UpCodes · South Carolina Home Energy Rebates — SC Energy Office · South Carolina Electricity Rates 2026 — EnergySage
What Irmo code requires
Replacing a water heater in Irmo follows South Carolina rules under the International Plumbing Code (IPC) — adopted as the South Carolina Plumbing Code 2021. 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 (where a backflow preventer or check valve is present)
Required where a pressure regulator or backflow preventer is present.
- Plumbing codeInternational Plumbing Code (IPC) — adopted as the South Carolina Plumbing Code 2021
- Good to know—
Tankless water heaters intended for domestic use are limited to a maximum output of 140°F; many local jurisdictions (e.g., Columbia, Charleston) strictly require a permit even for a simple like-for-like replacement.
Sources: South Carolina Plumbing Code 2021 (IPC 2021), Chapter 5 Water Heaters — UpCodes · South Carolina Home Energy Rebates — SC Energy Office · South Carolina Electricity Rates 2026 — EnergySage
Not sure which rules and rebates apply to your home?
A licensed Irmo 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 Irmo
South Carolina water heating is mostly electric, which shapes the money back:
- StateUp to $1,750 for a heat pump water heater (income-qualified, within an overall household cap of up to $14,000)South Carolina Home Electrification and Appliance Rebates (HEAR) — heat pump water heaters →
State-level program — verify eligibility before you buy.
- State$2,000–$16,000 depending on energy savings achieved and household incomeSouth Carolina Home Efficiency Rebates (HOMES) →
State-level program — verify eligibility before you buy.
- 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 South Carolina.
Ready to get your water heater fixed in Irmo?
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- Licensed & insured
- Same-day availability
- Upfront, no-pressure pricing
- Local pros near you
No obligation — talk through your options.
Hot water back in three steps.
- 1
Tell us what’s wrong
Use the cost tool or call — takes 30 seconds. No hot water, a leak, or time for a new unit.
- 2
Get matched with a local pro
We connect you with a licensed, insured water heater specialist near you — often the same day.
- 3
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Your pro confirms the price on-site and gets your hot water back. Most jobs done in a few hours.
Water Heater Installation in Irmo, explained.
What affects installation cost in Irmo?
The main cost drivers are unit type (tank vs. tankless), fuel source (electric vs. gas), and the need for new gas lines ($275–$900). Older homes may require code upgrades like expansion tanks or seismic strapping (though not required in SC). Permit fees and labor for proper installation also factor into the final price.
Common water heater installation issues in Irmo
Permit requirements
Irmo requires a permit for all water heater replacements, including like-for-like swaps. Failure to pull a permit can lead to fines or issues during home sale.
Expansion tank on closed systems
If your home has a backflow preventer or check valve, an expansion tank is required by code to prevent pressure buildup and damage.
Aging home infrastructure
Homes built around 1983 may have outdated plumbing or electrical systems that need upgrades to support modern water heaters, especially tankless units.
Water Heater Installation FAQs — Irmo
Yes, a permit is required for all water heater installations in Irmo, even for like-for-like replacements. Your installer should handle the permit process.
Water Heater Installation near Irmo
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