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Sample article — written for the fictional "Mile High Plumbing" (Denver) to show what a $199 pack delivers. AI-assisted, human-finished.
Short answer: most Denver homeowners pay between $1,400 and $2,600 for a standard tank replacement, installed, all-in. The full honest range runs wider, and what pushes your number up or down is mostly knowable before anyone picks up a wrench. This is what moves it.
The Typical Numbers
These are installed prices for a licensed replacement in the Denver metro: unit, labor, permit, haul-away of the old tank, and the code-required parts listed below. Not a handyman special with no permit.
- Standard 40–50 gallon gas tank: $1,400–$2,600. This covers most Denver homes. A basic 6-year-warranty tank lands near the bottom; a 9- or 12-year-warranty unit with a power vent pushes toward the top.
- Standard 40–50 gallon electric tank: $1,200–$2,200. The units cost a bit less, but electric tanks in Denver are less common since gas is cheaper to run here.
- Tankless (whole-house gas): $3,500–$6,500. The unit alone costs three to four times a tank heater, and the install almost always needs venting and gas-line changes. More on that below.
- Power-vent or direct-vent gas tank: $2,000–$3,200. Needed when the heater sits somewhere a standard atmospheric vent can't reach, like the middle of a finished basement.
If someone quotes you $800 installed for a full replacement, something is missing. Usually the permit, the expansion tank, or a license.
What Actually Moves the Price
The unit and warranty tier. The tank itself is the biggest single line item. A 50-gallon gas tank with a 6-year warranty runs a few hundred dollars; the same size with a 12-year warranty and a better burner can cost double. Longer-warranty tanks genuinely tend to last longer (thicker anode rods, better glass lining), so this isn't pure markup. Ask for the price at two warranty tiers and decide with real numbers.
Code upgrades. Denver follows the International Plumbing Code with local amendments, and a replacement has to meet current code even if the old install didn't. The usual required additions:
- Thermal expansion tank ($150–$300 installed). Required when the house has a closed system, which is most Denver homes with a pressure-reducing valve or a check valve at the meter. This is the most common surprise line item on a quote.
- Drain pan with a drain line ($100–$250), required when the heater sits where a leak would damage the structure: finished basements, upper floors, closets above living space.
- Updated venting. Old single-wall vent connectors or improperly sized flues get replaced to current spec ($150–$400). Denver inspectors check this.
- Earthquake strapping. Denver is a low-seismic zone, but strapping is cheap and many installers include it.
The permit. Denver's plumbing permit for a water heater runs roughly $100–$200 depending on the municipality. Denver proper, Aurora, Lakewood, and Arvada each have their own fee schedule. A licensed plumber pulls it as part of the job. Unpermitted installs void the manufacturer's warranty and become a problem at resale when the buyer's inspector flags it.
Access. A heater sitting in an open basement next to the stairs is a two-hour job. A heater in a tight closet behind the furnace, down a narrow crawlspace, or at the bottom of steep basement stairs with a low ceiling adds labor, sometimes several hundred dollars. Measure the doorway and the path before you call; it helps the quote be accurate.
Gas line and venting work for tankless. Switching from tank to tankless almost always means upsizing the gas line (tankless units burn far more gas per minute than a tank's small burner), adding a dedicated stainless-steel vent or concentric vent run, and sometimes upgrading the electrical for the condensate pump. This is why tankless installs start where they do. It's also why converting back from tankless to tank is cheap, since the infrastructure is already oversized.
Disposal. Hauling the old tank is usually $50–$100 baked into the quote. Denver's water is hard on tanks, and mineral scale shortens their life, so the old one coming out will be heavy. If your quote doesn't mention disposal, ask.
Repair or Replace?
The math most plumbers use: if the repair costs more than half of replacement and the tank is past 8 years old, replace it. Denver's hard water gives tank heaters a typical life of 8 to 12 years. Check the serial number on the manufacturer's label. Most brands encode the manufacture date in the first four digits.
Repairs worth doing on a younger tank: thermocouple or igniter ($150–$300), gas control valve ($250–$450), pressure relief valve ($150–$250). A leaking tank body is never worth repairing. Once the steel shell or the welds go, it's done. Patching buys weeks.
How to Get a Quote You Can Trust
Get two or three quotes and compare them line by line, not just the total. A good quote lists: the exact unit (brand, size, fuel, warranty years), the permit, the expansion tank, venting work, the drain pan if needed, disposal, and the labor warranty. If one quote is $700 cheaper but doesn't mention a permit or an expansion tank, you're comparing different jobs.
Ask whether the installer is licensed in your municipality and whether they pull the permit themselves. In Colorado, water heater replacement requires a licensed plumber. It's not a homeowner-permit job in Denver.
And be wary of the "your heater is dangerous, decide today" pitch. A failing heater is urgent when it's leaking. It is not urgent when a door-knocker says so. A second quote takes a day and costs nothing.
Call Mile High Plumbing
(Sample article for a fictional business. Mile High Plumbing is not a real company.)
Mile High Plumbing installs and replaces water heaters across the Denver metro: Denver, Aurora, Lakewood, and Arvada. Call (303) 555-0147 for a written quote that lists the unit, the permit, and every code-required part before we start. If your tank is under 8 years old and the fix is small, we'll tell you to repair it instead.