Sump Pump Cost: Average Prices & Cost Factors

Installing a sump pump typically costs $500 – $4,000, according to This Old House, with a midpoint near $1,400. Replacing a pump in an existing basin costs less because the pit, piping, and electrical work are already in place. A first-time install that requires digging a new basin and running a discharge line costs more.

The figures below come from published guides and carry a check date of Oct 11, 2026. They are split by type of work, pump type, and horsepower so you can match them to your situation.

The difference between a replacement and a new install is the basin. When a pump fails, a plumber can often swap the unit and reconnect the discharge pipe in a short visit. When a basement has no sump at all, the crew has to break the slab, dig a pit, set a basin, run a discharge line, and sometimes tie into drainage. That is why the top of the range is so much higher than the bottom.

The pump itself is a small part of a new-install bill but a large part of a replacement. Pumps differ in how they get power and what happens during an outage.

• Primary electric pump. The standard choice. It runs on household power and stops working in an outage unless you add a backup.
• Battery backup. A second pump powered by a battery that takes over when the power fails or the main pump gives out. Storms that cause flooding can also knock out power, so a backup is worth considering in flood-prone homes.
• Primary with battery backup. A paired system sold as a package.
• Combination pump. A single unit that combines a primary pump and a backup in one setup.

Horsepower describes pumping strength. A stronger motor moves more water and typically costs more. Most homes do not need the largest size, but a basement with a high water table or a large drainage area may.

A pump that is too small may run constantly or fall behind in heavy rain. One that is too large may cycle on and off too often, which can wear it out. Ask the installer how they sized the pump for your pit and your water inflow.

Installation labor depends on whether the job is a swap or a new pit. Digging through concrete and running pipe takes much more time than reconnecting a pump.

Plumbers often quote a flat price for the whole job rather than billing by the hour. Hourly rates are still useful for judging a quote.

The discharge pipe carries water away from the house. Burying it protects it from freezing and damage and keeps the yard tidy, but it takes more labor and excavation.

An above-ground pipe is cheaper but more exposed. Where winters are cold, ask your installer how they will prevent freezing, and where the pipe will discharge so water does not run back toward the foundation. Local rules may limit where you can discharge, so check before the work starts.

• New install or replacement. A new basin adds excavation and labor.
• Pump type and power. Backup systems and combination pumps cost more than a single pump.
• Horsepower. Higher-powered pumps cost more.
• Discharge route. Buried lines cost more than above-ground lines.
• Slab thickness and access. Breaking through thick concrete takes more time.
• Electrical work. A grounded outlet within reach of the pit is required. A new circuit adds cost.
• Permits. Some areas require a permit or inspection, especially when plumbing is tied into drainage.
• Waterproofing needs. If water enters from several points, you may need drain tile or other work beyond the pump.

The sources in this guide cover installation and replacement, so no repair figure is listed. Repair cost depends on the failure. A stuck float switch or clogged intake is a short service visit. A burned-out motor usually means replacement, because the pump is a relatively inexpensive part and labor makes up much of the bill. Ask the plumber to price both a repair and a replacement.

The two sources use different samples. One reports a broad range that includes complex installs with long discharge runs and basins. The other reports quotes collected for drain installation work. A guide that includes labor, basin, and piping will report more than one that covers a simple swap. Read the group labels before comparing figures.

A pump that is older, noisy, runs constantly, or has failed more than once is usually better replaced. A repair is more reasonable when the pump is fairly new and the problem is a switch, a clog, or a check valve. Because a failed pump can lead to basement flooding, many homeowners replace instead of risking another failure before storm season. If your pump is not old yet runs often, check whether groundwater inflow has increased rather than just swapping the unit.

Replacing a pump in an existing basin is a manageable DIY project for someone comfortable with basic plumbing and electrical connections. Installing a new pit is harder. It means cutting a slab, handling debris, and working with plumbing and electricity in a wet area. Mistakes can lead to flooding, electrical shock, or a pump that fails when needed. Use a ground-fault protected outlet, and hire a licensed plumber or electrician when new wiring or drainage connections are involved.

• Is this a replacement or a new basin and pit?
• What pump type and horsepower are quoted, and why?
• Does the price include a battery backup, check valve, and discharge pipe?
• Where will the water discharge, and how will the line avoid freezing?
• Are permits, debris removal, and any concrete patching included?
• What is the warranty on the pump and on the labor?