HomeGuide's sump pump guide puts total installation at $600 to $2,500 on average, with a national average of $1,600, a minimum of $450 and a maximum of $4,000. The page is credited to August 26, 2023, so treat it as an older reference. No guide publishes verified Annapolis prices, so Annapolis MD Basement Waterproofing sets out what the guide says and what moves the number on a real house.
The Short Answer
A new installation costs hundreds to a couple of thousand dollars. Replacing an existing pump costs less, because the pit is already there. The pump unit itself is a fraction of the total, and the pit, the discharge line and any drainage that feeds it make up the rest. We price every job after an inspection.
Compare the Prices
| Item | National figure (HomeGuide, sump pump guide dated August 26, 2023) |
|---|---|
| Installation, total installed | $600 to $2,500 average range; national average $1,600; minimum $450; maximum $4,000 |
| Replacement | $400 to $700 on average |
| Pump unit, all types | $100 to $800 |
| Pedestal pump unit | $100 to $400 |
| Submersible pump unit | $100 to $800 |
| Water-powered pump unit | $100 to $700 |
| Battery-powered pump unit | $150 to $800 |
| Lifespan | 5 to 30 years; pedestal 10 to 30 years; submersible 5 to 20 years |
HomeGuide's January 23, 2026 basement waterproofing guide also lists sump pump installation at $600 to $2,500 or more. The sump pump page does not list a separate price for a battery backup system.
What Moves the Price
- The pump type. A pedestal pump, a submersible pump and a battery-powered pump sit at different prices.
- The pit. A new pit means cutting the basement floor, and an existing pit does not.
- The discharge line. A longer run to a place the water can leave costs more.
- The drainage that feeds it. A pump on its own costs less than a pump with an interior drain. HomeGuide lists interior waterproofing at $6,000 to $12,000 on average.
- The condition of what is there. A replacement that reuses the pit and line costs less.
When to Replace a Sump Pump
HomeGuide says a sump pump typically lasts 5 to 30 years, and the range is wide because the type and the workload differ. A pump that runs constantly, makes new noises, cycles rarely when it should run or has stopped is worth checking now, before the next heavy rain. Sump pump installation
Annapolis Conditions That Affect the Job
The NOAA climate normals for the Annapolis NAF, MD station (1991-2020) record 43.99 inches of precipitation a year, and the Maryland Geological Survey says the water table is typically at its highest in the spring and early summer months. A pump that sits idle through a dry spell has to work during the wet months. The City of Annapolis permit page lists installing or altering a plumbing system among the work that needs a permit, and we confirm what applies to your address and where the discharge may go before we install. Why is my basement wet
Frequently Asked Questions
How much does sump pump installation cost?
HomeGuide's sump pump guide puts it at $600 to $2,500 on average, with a national average of $1,600. Those are national averages, not Annapolis quotes. An on-site inspection gives the number for a specific house.
How much does it cost to replace a sump pump?
HomeGuide puts replacement at $400 to $700 on average. The pit and discharge line may be reusable, which is why it costs less than a new installation.
How long does a sump pump last?
HomeGuide says a sump pump typically lasts 5 to 30 years, with pedestal pumps lasting 10 to 30 years and submersible pumps 5 to 20 years.
Is a battery backup worth it?
HomeGuide's sump pump page lists battery-powered pump units at $150 to $800 but does not give a separate price for a battery backup system. We discuss it at the inspection, based on how much water the basement collects and how it is used.
Do I need a sump pump?
Not always. If the water comes from a downspout that empties at the wall or a slope that leads to the foundation, fixing that may be enough. HomeGuide says regrading is occasionally enough on its own. Wet basement repair
