What a quote should actually include
A sump pump system is more than the pump. A complete installation includes the basin or pit liner, the pump itself, a check valve that stops water from flowing back down the pipe, the discharge line to the outdoors, and a power source. Many homeowners are quoted only the pump and then find the other items arrive as add-ons.
Ask for each piece in writing before work starts. A line-by-line quote makes it easy to compare two contractors, and it makes clear which items you are paying for twice. That includes the electrical supply, since a sump pump should run on its own protected outlet.
What changes the price of a new sump pump
These five factors explain most of the difference between a simple swap and a full new system.
Cutting and breaking a concrete slab, digging the hole, setting a liner and patching the floor is far more work than dropping a pump into a basin that is already there.
A pedestal pump sits above the pit and is cheaper to buy, while a submersible pump sits inside the basin and is quieter and handles more water. Higher horsepower and cast-iron housings cost more.
A backup pump with its own battery protects you when a storm knocks out power, which is when pumps are needed most. It adds a second pump, a charger and sometimes an alarm.
A short run through a nearby rim joist is simple. A long run, a buried line, or a path that must avoid a neighbor's yard adds pipe, trenching and labor.
A dedicated GFCI-protected outlet may need an electrician. Whether a permit applies depends on the job, so the building department decides.
Standard homeowner policies often exclude groundwater and seepage and may cover sump failure only through an endorsement. Water backup coverage, if you have it, may have a dollar limit. Read your policy or ask your agent, because your policy decides what is covered.
Prices vary with the basin, the pump and the discharge run, so call our 24/7 line and describe your setup for a real number before anyone starts work.
Which setup fits which basement
Match your situation to the column on the right. The right choice is often smaller than a salesperson suggests.
| Your situation | Reasonable choice | Why |
|---|---|---|
| Existing pit, pump just died | Replace like for like in the same pit | Fastest fix, no slab work |
| Pump runs often after rain | Submersible with a check valve | Better at repeated cycling |
| Basement is finished or has stored valuables | Add battery backup and an alarm | Power often fails during storms |
| No pit and water appears at the floor edge | Have the source diagnosed first | A pit alone may not stop seepage |
| Rarely wet, only after heavy storms | Single pump with a test schedule | Backup may not justify the extra cost |
| Bathroom or laundry below the sewer line | Ask about a sewage ejector, a different system | A sump pump cannot handle waste water |
What the installation day looks like
- 1
Locate the water source.
The installer checks where water enters, for example a floor crack, a wall joint or a downspout that dumps near the foundation, and picks the pit location.
- 2
Set the basin.
If a pit is needed, the slab is cut, soil is removed and the liner is set below floor level with gravel around it.
- 3
Mount the pump and check valve.
The pump goes in on a level base, the check valve is placed above it, and the discharge pipe is connected.
- 4
Run the discharge line outdoors.
The line goes out through the foundation or rim joist and ends where water drains away from the house, not toward a neighbor.
- 5
Test with water.
The installer pours water into the pit, watches the float switch trigger the pump, and checks every joint for leaks.
Why an old pump quietly fails
Pumps fail at the float switch, at the impeller where gravel or sediment wears it down, and at the check valve. A pump that only runs once or twice a year can seize from sitting idle. The simple test is to pour a bucket of water into the pit twice a year and listen for it to start.
A pump that turns on and off every few seconds, runs without moving water, or makes a grinding sound is near the end. Replacing it before the next big storm costs less than cleaning up after one. Our sump pump repair and installation page covers what we look at on a service call, and basement waterproofing explains when a pump is only part of the answer.
Wildwood terrain and rain: what to know locally
The City of Wildwood's Master Plan describes the area as rolling and hilly woodlands of the Ozark Foothills, with erosion-sensitive soils. It also notes that Manchester Road follows a ridge that separates drainage toward the Meramec River on the south from the Missouri River on the north. Where your lot sits relative to a slope or a ridge changes how much groundwater and runoff reaches the foundation.
The National Weather Service lists normal annual precipitation for the St. Louis climate station at 41.70 inches. During the November 4 to 6, 2024 storm, a trained spotter reported 9.31 inches at 1 E Ellisville. A storm that size is a reason to test the pump and discharge line before the season, not after. Ellisville and Ballwin have their own creek corridors, so a neighbor's basement tells you little about yours.
On permits, the city lists new or replaced plumbing as needing a building permit through St. Louis County. We cannot say how that applies to a sump pump swap, so ask the building department before work starts.
Sources: city master plan, National Weather Service climate report, National Weather Service event report, city website
Not sure whether you need a new pit or just a pump?
Tell us what the basement does in a heavy rain and we will say what it needs before anyone breaks the slab.
Questions we hear in Wildwood, MO
It depends on the factors above, mainly whether a pit exists, the pump type, backup power and the discharge route. We do not post a flat figure because the range is wide. We give a clear price before work starts after hearing your setup.
For a finished basement or one that floods in storms, usually yes, because power often fails when pumps are needed most. For a basement that stays dry except in rare events, a single pump with regular testing may be enough.
It varies with how often it runs, water quality and the quality of the pump. A pump that cycles often wears out sooner. Test it twice a year and replace it before it fails.
Replacing a pump in an existing pit is a reasonable DIY job if you turn off power and are comfortable with plumbing. Cutting a new pit, running a discharge line or doing electrical work is better left to a licensed plumber and electrician.
It should discharge outdoors where water drains away from your house and does not run onto a neighbor. Never connect a sump line to the sanitary sewer, and ask the building department about local discharge rules.
No. It removes water that reaches the pit. If water enters through wall cracks or a hydrostatic leak, you may need drain tile or a structural fix as well.
Hilly lots can send runoff toward a foundation, but not every Wildwood basement needs a pump. If yours stays dry in heavy rain, test it and watch it rather than add one.
Have a question this page did not answer? Call (855) 575-2890 at any hour and a dispatcher will talk it through.