Sump pump replacement cost by pump type
| Job | What's included | Typical market range | Fair price* |
|---|---|---|---|
| Pedestal sump pump | 1/3 HP pedestal pump with float switch · Remove and dispose of old pump · Reconnect to existing discharge line · Test cycle | $350–$1,260 | $700 |
| Submersible sump pump, 1/3 HP | 1/3 HP cast-iron submersible pump with vertical float · Remove and dispose of old pump · Reconnect to existing discharge line · Test cycle | $410–$1,260 | $875 |
| Submersible sump pump, 1/2 HP | 1/2 HP cast-iron submersible pump with vertical float · Remove and dispose of old pump · Reconnect to existing discharge line · Test cycle | $500–$1,300 | $1,000 |
*National base price before local adjustment and add-ons. Prices are current estimates while our provider network finalizes local pricing. Market ranges come from published contractor prices and national cost guides (sources). Updated October 2026.
Prices assume an existing pit, a working discharge line and a nearby outlet. Digging a new pit, or new drain tile, is a different project and isn’t covered by these prices.
What’s included, and what costs extra
| Add-on | When you need it | Fixed price |
|---|---|---|
| Same-day / after-hours service | Book for today, or evening and weekend slots. | $250 |
| Battery backup pump | Keeps pumping during power outages, when storms hit hardest. | $750 |
| New check valve | Stops pumped water from flowing back into the pit. | $95 |
| High-water alarm | Sounds an alert before the pit overflows. | $85 |
Signs it’s time to replace your sump pump
- It runs constantly or cycles on and off rapidly, even in dry weather.
- The motor hums but no water moves, or it makes grinding or rattling noises.
- Visible rust, or a stuck or tangled float switch.
- It’s past roughly 7–10 years old. Replace it before storm season, not during it.
DIY: test and swap a sump pump
- Test it: slowly pour a bucket of water into the pit. The float should rise, the pump should start, and it should empty the pit and shut off.
- Unplug the pump and loosen the union or rubber coupling on the discharge pipe above the pit.
- Lift out the old pump and clean debris from the pit floor.
- Set the new pump on a flat, solid surface (not loose gravel), and check that the float can move freely without touching the pit wall.
- Reconnect the discharge, making sure the check valve arrow points away from the pump, plug in to a GFCI outlet, and run the bucket test again.
Water already rising? Call a plumber for same-day service. Don’t stand in water near electrical equipment.
Frequently asked questions
How much does sump pump replacement cost?
A fair price for replacing a sump pump in an existing pit costs $700–$1,000 installed, depending on pump type and horsepower. A battery backup pump is $750 extra.
How long does a sump pump last?
Many sump pumps last somewhere around 7–10 years, depending on how often they run. Test yours each spring by pouring a bucket of water into the pit.
Pedestal or submersible sump pump?
Pedestal pumps sit above the pit, so they’re easier to service and often last longer, but they’re louder. Submersible pumps sit in the pit, so they’re quieter and usually move more water. Most homes choose submersible.
What size sump pump do I need?
A 1/3 HP pump handles most homes with average groundwater. A 1/2 HP pump suits a high water table, frequent cycling, or a long or high discharge run. If your current pump keeps up, replace it like-for-like.
Can I replace a sump pump myself?
If the pit and discharge line are in good shape, swapping a sump pump is a common DIY project: unplug it, disconnect the discharge pipe, swap the pump, reconnect, and test. Hire a pro if there’s no dedicated outlet, the check valve or discharge line needs work, or water is already rising.