What is the average cost to replace a well pump?

What Drives the Price

• Well depth. The single biggest factor. Every additional hundred feet adds pipe, wire and pulling time. A 120-foot well and a 600-foot well are different jobs with different equipment.
• Pump type and horsepower. A half-horsepower submersible for a two-bath house is a different purchase from a 1.5 HP unit feeding a home, a shop and livestock tanks.
• Constant pressure vs. conventional. A variable-speed constant-pressure system adds $1,500 to $2,500 and holds steady pressure across the house while cycling far less.
• Pipe material. Replacing galvanized drop pipe with poly or stainless adds cost and adds decades.
• Pressure tank condition. If it is original, it is almost certainly due, and doing it now avoids paying for the same trip twice.
• Casing condition. A well full of silt or a collapsed section has to be addressed before a new pump goes down.

What a Complete Quote Should Include

Ask every contractor to itemize these. A quote missing three of them is not cheaper, it is incomplete.

• The pump, by make, model and horsepower
• New drop pipe sized to the setting depth
• New submersible cable and a waterproof splice kit
• Torque arrestor and safety rope
• Check valves at the pump and at the pitless adapter
• A sanitary well cap
• Pressure switch and gauge
• Removal and disposal of the old pump and pipe
• Well disinfection and a water sample after startup
• Flow and drawdown testing with the numbers written down

Star Plumbing Co. quotes every well pump job this way before work begins. See the full scope on our well pump services page, or request an estimate.

Permits and Colorado Rules

A like-for-like residential pump replacement does not require a new Colorado Division of Water Resources permit, provided the new pump does not exceed the pumping rate or depth authorized by your original well permit. Most domestic permits cap pumping at 15 gallons per minute. Installing a higher-capacity pump that exceeds that rate requires a permit amendment before the work, not after.

If the casing has collapsed or the well has gone dry and a new borehole is needed, that is a replacement well permit and a state review that typically takes two to four weeks. Our guide to Larimer County well permits and pump replacement rules walks through which situation you are in.

How much does it cost to replace an existing well pump?

Replacing a pump already in the ground usually runs $1,200 to $3,000 for a typical residential submersible, installed. You are paying mostly for labor and the hardware that comes up with the old pump: drop pipe, wire, torque arrestor, pitless adapter seal and well cap. Depth is the biggest cost driver. A 120-foot alluvial well near Wellington is a straightforward morning, while a 500-foot bedrock well in Laporte needs heavier equipment and more pipe, and the bill reflects that. A like-for-like replacement does not require a new Colorado state well permit as long as the pump matches your permitted depth and pumping rate. Upsizing capacity does require state approval first.

The practical difference between "replace an existing pump" and a new installation is that nothing has to be designed from scratch. Your well log gives the depth, the casing diameter and the permitted yield, which means a contractor can quote accurately before the truck leaves the yard. Ask for your well log to be pulled from the state database as part of the estimate.

How much does it cost to replace a home well pump?

For a typical single-family home on a private well, budget $1,200 to $3,000 for a complete submersible pump replacement, installed. Shallow-well jet pump setups can come in under $1,000. Deep bedrock wells, low-yield wells that need a constant-pressure variable-speed pump, or jobs where the casing has to be cleaned first can reach $4,000 to $6,000. A constant-pressure system costs more upfront but holds steady pressure across the house and cycles less, which pays back in pump life. Always ask what the quote includes, because pipe, wire, tank, well cap and post-startup water testing are where two estimates for the same job diverge by a thousand dollars.

Households with high simultaneous demand, two or more bathrooms, irrigation, or a long run from the wellhead to the house are the ones where a constant-pressure system earns its premium. If your current complaint is pressure that collapses when someone starts a shower, the pump size may not be the problem at all.

How much does it cost to have a submersible pump replaced?

Expect $1,200 to $3,000 for a standard residential submersible replacement, with deeper wells pushing past that. The pump itself is typically $400 to $1,000 for a half to one horsepower unit. The rest is labor, new drop pipe and wire sized to depth, a torque arrestor, splice kit, check valves, a sanitary well cap and disposal of the old unit. Most contractors replace pipe and wire along with the pump, and they should, because putting twenty-year-old pipe back down a well to save a few hundred dollars is how you pay for the same job twice. If the pressure tank is original, replace it while the system is open.

Submersibles make up the large majority of replacements in Larimer County, because almost every well deeper than about 25 feet needs a pump that pushes rather than one that lifts. If you have an above-ground jet pump in a pit house, your replacement cost will typically sit well below the submersible range.