Start with the answer: five things decide the price
The price of a gas water heater replacement comes from the tank itself, the venting, the gas and water connections, the work to remove the old unit and any permit. Most of the spread between two quotes lives in the venting and the extras, not in the tank.
We do not print dollar ranges, because no verified local pricing exists and a number out of context misleads. What you can do is ask for the clear price before work starts, in writing, with each of the lines below listed.
What a complete gas water heater quote should list
If a quote leaves any of these out, ask whether it is included or extra.
| Line item | What it covers | Why it changes the total |
|---|---|---|
| The water heater | Tank size, efficiency and type | Bigger or higher-efficiency units cost more up front |
| Venting | Reusing the existing vent or running a new one | A power vent or a damaged old vent adds parts and labor |
| Gas connection | Shutoff valve, connector, sediment trap | Older connections often need updating |
| Water connections | New supply lines, shutoff valves, relief valve and discharge pipe | Corroded old fittings add work |
| Removal | Draining, hauling and disposing of the old tank | Stairs and tight basements add time |
| Permit and inspection | Whether a permit applies and who pulls it | Ask before work starts |
Allendale, MI: gas heat, Grand Rapids water and where permits go
The Census Bureau's American Community Survey (2020 to 2024) counts 5,900 Allendale Township households heating with utility gas, against 1,651 with electricity. That tells you gas service is common here, but it counts home heating fuel, not water heaters. If you are weighing a switch from gas to electric, ask your installer to price it separately.
The township buys water from the City of Grand Rapids, whose 2025 plant-tap average hardness is 142 mg/L, or 8.3 grains per gallon, with a range of 7.4 to 9.6. Allendale's own report prints no hardness number, so test your tap. Hard water leaves scale on the bottom of a tank, so ask about flushing and the anode rod when you choose a heater.
Professional Code Inspections handles plumbing and mechanical permits and inspections for the township. Ask your installer whether your job needs a permit and who pulls it. Michigan's plumbing code currently adopts the 2021 International Plumbing Code, so ask your inspector which edition applies.
Source: U.S. Census Bureau ACS 2020 to 2024, the City of Grand Rapids 2025 water analysis and Allendale Charter Township's planning and zoning page.
A quick swap versus a proper replacement
Both can finish the same day. The difference is what gets checked on the way.
A quick swap skips
- Looking at the vent for gaps, corrosion or poor slope
- Replacing an old gas connector and valve
- Checking for water or gas leaks after connecting
- Asking about a permit or inspection
A proper replacement includes
- A vent check and a test for proper draft
- New connectors where the old ones are worn
- A leak check at every joint, including the gas side
- A clear explanation of the permit and what happens next
How to compare two gas water heater quotes
Ask for each quote to list the same items. Then look at these five things, because they are where two prices usually differ.
Insurance rarely pays for replacing a worn-out water heater. Sudden events, such as a tank failure that floods a finished basement, are the usual covered kind, but wear and routine replacement typically are not. Check your own policy.
A larger tank or a higher-efficiency unit costs more up front and may save on gas later. Ask what the savings assumption is.
Reusing a sound vent is simpler than a new run or a power vent. This is the biggest swing factor.
A tank at the bottom of a narrow staircase takes longer to move than one in an open utility room.
Gas connections, relief valve piping and any permit work belong on the quote as separate lines.
A tank that fails in the middle of the night is priced differently from a planned swap. Ask for both.
Replace now or wait? What to weigh before you call
A tank that leaks from the body cannot be repaired and should be shut off. Close the cold water inlet, turn the gas control to off if you can reach it safely, and call. If you smell gas, leave the house and call your gas utility or 911, and do not touch switches or the heater.
A heater that works but is old, rumbling or slow is a planning question. Replacing on your schedule usually means more choices than replacing in an emergency. See our water heater replacement and water heater installation pages for how those visits run.
We replace gas water heaters in Allendale and nearby towns such as Jenison and Hudsonville. Water suppliers differ by town, so test your own tap rather than using Allendale's numbers.