What’s in these numbers

Each total is a typical job, priced the way a contractor’s estimate is priced:

  • A new submersible sump pump of the size shown, set in the existing pit and connected to the existing discharge, with the old pump taken out.
  • Overhead and profit: 20%, the standard markup on a contractor’s estimate.
  • Sales tax on the materials, at the state’s average rate.

Not in them: cutting a new pit into the slab, a new basin, a new discharge line, a check valve, a battery backup pump, an alarm, a new outlet, and permits.

Which size

Horsepower alone doesn’t pick the pump. Each pump’s maker publishes a chart of how many gallons an hour it moves at each height of lift, from the pit up to where the discharge leaves the house. The right pump keeps up with how fast the pit fills at your home’s lift, with room to spare in a storm.

What moves the price

  • Size. Each step up in horsepower costs more.
  • A new pit. Cutting the slab, digging the pit and setting a basin is a job of its own on top of the pump.
  • The discharge. A new line out of the house, or a longer one away from the foundation, adds pipe and labor.
  • Where you live. Pick your state in the box above.

Common questions

How much does it cost to replace a sump pump?

About $625 to $800 for a 1/3 hp pump in the existing pit, typically $700.

How much is a 1/2 hp sump pump installed?

About $725 to $925, typically $825.

How much is a 3/4 hp sump pump installed?

About $850 to $1,050, typically $950.

The basement flooded. What else is there?

Wet drywall, insulation, carpet and framing need drying out or replacing. The water damage restoration guide covers what that costs.