Sump Pump Installation and Replacement Cost in Southern Maryland: 2026 Price Guide

By Gray & Sons Contracting · September 14, 2026

Sump pump installation in Southern Maryland costs $800 to $2,500 for a new system with pit excavation in 2026, with most homeowners in Calvert, St. Mary's, and Charles County paying around $1,400. Replacing an existing pump in an already-built sump pit costs $300 to $700. A primary pump paired with a battery backup, the recommended configuration for this area, runs $600 to $1,200 installed.

If you live in Southern Maryland and you have a basement, you either have a sump pump or you need one. The tri-county area sits on the Atlantic Coastal Plain, where heavy clay soil, a seasonally high water table, proximity to the Chesapeake Bay and its tributary rivers, and 45 to 50 inches of annual rainfall create conditions that push water into basements with relentless consistency. A sump pump is the mechanical last line of defense, the device that collects groundwater and surface water that has entered the foundation drainage system and ejects it away from the house before it floods the basement floor.

Fall is the ideal time to install or replace a sump pump in Southern Maryland. Summer thunderstorms have tested your current system (or revealed that you do not have one), and the wet season, October through April, is ahead. A pump installed in September or October is in place and tested before the fall rains begin, the winter freeze-thaw cycles saturate the soil, and the spring snowmelt and storms push the water table to its annual peak. Waiting until water is already in the basement means paying emergency service rates and living with damage that could have been prevented.

Here is what sump pump installation and replacement costs in Southern Maryland, what type of pump you need, why a battery backup is not optional in this area, and what to expect during the installation process.

Sump Pump Installation Cost at a Glance

The wide range in new installation costs reflects the difference between a straightforward installation in an accessible corner of an unfinished basement (closer to $800) and a complex installation that involves cutting through a thick concrete floor, excavating in tight quarters, running a long discharge line, and adding a battery backup system (closer to $2,500). Most Southern Maryland installations fall in the $1,200 to $1,800 range for a quality submersible pump with a basic discharge line.

Sump Pump Cost by Type

Not all sump pumps are the same. The type of pump determines the purchase price, installation cost, noise level, lifespan, and suitability for your specific water conditions.

Submersible Sump Pumps: The Standard Choice

A submersible sump pump sits entirely inside the sump pit, submerged in the water it collects. The motor is sealed in a waterproof housing, and the pump activates when water reaches a set level (controlled by a float switch). When the float rises, the pump turns on and pushes water up through the discharge pipe and out of the house. When the water level drops, the float falls and the pump shuts off.

Submersible pumps are the industry standard for residential sump systems in Southern Maryland because they are quieter than pedestal pumps (the water muffles the motor noise), more powerful (they handle higher water volumes), and out of sight inside the covered pit. They handle the sustained water volumes that Southern Maryland's clay soil and high water table produce, and they are designed to run frequently, cycling on and off dozens of times per day during the wet season without overheating or wearing prematurely.

The price range for submersible pump units, $90 to $1,000, reflects a wide quality spectrum. A $90 pump from a hardware store has a 1/4 or 1/3 horsepower motor, a tethered float switch, a plastic impeller, and a 1 to 3 year warranty. It will work, but it will not last. A $400 to $700 pump from a brand like Zoeller, Wayne, Liberty, or Superior has a 1/3 to 1/2 horsepower cast iron or stainless steel motor, a vertical float switch (less prone to jamming), a cast iron or engineered thermoplastic housing, and a 3 to 5 year manufacturer warranty. That is the range where most contractors and homeowners should be shopping.

For Southern Maryland homes with heavy water intrusion, homes near creeks, homes in low-lying areas of Lusby, Solomons, Lexington Park, or the Wicomico River lowlands, a 1/2 horsepower pump rated for 3,000 or more gallons per hour at 10 feet of lift is the minimum. A 1/3 horsepower pump may not keep up during heavy storms when the water table surges and the pit fills faster than the pump can empty it.

Pedestal Sump Pumps: Budget Option with Trade-Offs

A pedestal sump pump has its motor mounted on a column above the pit, with the impeller at the bottom of the column in the water. Because the motor is above the water line and exposed to air, it runs cooler and is easier to access for maintenance. It is also significantly louder, the motor is not submerged, so every cycle is audible throughout the basement.

Pedestal pumps cost less to purchase ($75 to $800 for the unit) and are easier to replace because the motor is accessible without reaching into the pit. They work in narrower pits where a submersible pump would not fit. Their lifespan is comparable to submersible pumps at the low end (5 to 15 years), though the exposed motor is vulnerable to dust, humidity, and accidental contact.

Pedestal pumps are a reasonable choice for light-duty applications, a basement that gets minor seepage a few times per year, a secondary pump in a utility area, or a situation where the existing sump pit is too narrow to accommodate a submersible unit. For a home with regular water intrusion and a properly sized sump pit, a submersible pump is the better investment in durability, noise reduction, and pumping capacity.

Battery Backup Sump Pumps: Not Optional in Southern Maryland

A battery backup sump pump is a secondary pump with its own dedicated battery that activates when the primary pump loses power or fails. It is the single most important upgrade to any sump pump system in this region, and it is the one that most homeowners skip until after they have experienced a basement flood during a power outage.

The math is simple. The storms that produce the heaviest rainfall in Southern Maryland, summer thunderstorms that dump 1 to 2 inches per hour, tropical systems, and nor'easters, are the same storms that knock out power. A primary sump pump without battery backup fails exactly when it is needed most. Southern Maryland averages several multi-hour power outages per year from storm damage, and outages lasting 12 to 24 hours or longer are not unusual during major events. Hurricane season runs through November. A basement that takes on 6 inches of water during a 12-hour power outage costs $5,000 to $20,000 to clean up and repair, drywall, flooring, appliances, stored belongings, and mold remediation. A battery backup system costs $200 to $500 installed.

DC battery backup is the most common and most versatile option. It uses a marine deep-cycle battery (or a maintenance-free AGM battery) and a dedicated charger that keeps the battery topped off. When the power goes out, the backup pump activates automatically, drawing power from the battery. A fully charged battery can run a backup pump for 6 to 12 hours depending on the battery capacity and how frequently the pump cycles. For longer outages, a portable generator can recharge the battery or power the primary pump directly.

Water-powered backup pumps use the pressure from the municipal water supply to create suction that draws water out of the sump pit without any electricity. They are clever, require no battery maintenance, and run indefinitely during a power outage as long as the water supply has pressure. The downside is that they use a significant amount of municipal water, roughly 1 gallon of supply water for every 2 gallons of sump water pumped, and they do not work for homes on well water (which lose pump pressure when the power goes out). For homes in the Calvert, St. Mary's, or Charles County municipal water service areas, a water-powered backup is a viable, low-maintenance option.

Combination systems integrate the primary submersible pump and the battery backup into a single unit with shared controls, an alarm panel, and a single discharge pipe. They are the most convenient option and the most expensive. Brands like Basement Watchdog, Wayne, and Zoeller offer combination systems in the $500 to $1,500 range for the unit, with installed costs of $600 to $1,200.

New Installation vs. Replacement: Cost Breakdown

The cost difference between installing a sump pump system from scratch and replacing an existing pump in an already-built pit is substantial, because the expensive part is not the pump, it is the pit.

New Sump Pump Installation: $800 to $2,500

A new installation in a basement that has never had a sump pump requires creating the entire system: the pit, the basin, the pump, and the discharge piping. Here is where the money goes.

Concrete cutting is the first step. The basement floor, typically 3 to 4 inches of concrete, must be cut with a concrete saw and the section removed to expose the soil below. The cut is typically 24 to 30 inches in diameter, large enough to accommodate the sump basin.

Pit excavation in Southern Maryland means digging through clay. The pit needs to be deep enough for the sump basin, typically 24 to 30 inches below the floor surface, and the clay is dense, heavy, and slow to dig by hand. In areas with a high water table, the pit fills with groundwater as you dig, which complicates the excavation. This is the part of the job that homeowners who attempt DIY installation underestimate most severely.

The sump basin is a rigid plastic or fiberglass liner, typically 18 to 24 inches in diameter and 24 to 30 inches deep, perforated on the sides to allow groundwater to flow in. The basin prevents the pit walls from caving in and keeps soil and sediment out of the pump intake. A sealed lid on top prevents moisture from evaporating into the basement and prevents objects (and children) from falling in. Basins cost $50 to $200 depending on size and quality.

Electrical work is required if there is no existing outlet near the sump pit location. A sump pump must be on a dedicated circuit with GFCI (ground fault circuit interrupter) protection, per the National Electrical Code. An electrician running a new dedicated circuit from the panel to the sump location costs $150 to $350. If a suitable outlet already exists near the pit, this cost drops to zero.

Pump Replacement in an Existing Pit: $300 to $700

Replacing a failed or aging pump in an existing sump pit is a straightforward job. The old pump is disconnected from the discharge pipe, pulled out of the pit, and replaced with the new unit. The new pump is connected to the existing discharge pipe, the float switch is adjusted, and the system is tested.

A pump replacement takes 1 to 2 hours for a plumber or waterproofing contractor. The existing basin, discharge piping, and electrical circuit are reused. If the existing check valve is functional, it stays. If the discharge pipe is in good condition, it stays. This is why regular pump replacement before failure, rather than emergency replacement after failure, is the cost-effective approach. A planned replacement costs $300 to $700 on a weekday appointment. An emergency replacement at 10 p.m. on a Saturday while the basement is flooding costs $600 to $1,200 or more, plus the cost of the water damage.

Labor Costs for Sump Pump Work

Labor accounts for roughly 40 to 60 percent of a new sump pump installation cost. The wide range on pit excavation ($600 to $1,800) reflects the difference between a standard dig in accessible soil and a difficult excavation through thick concrete, tight access, rock, or conditions that require dewatering (pumping out groundwater that floods the excavation as you dig, common in high-water-table areas of Southern Maryland).

Buried discharge lines cost significantly more than above-ground lines because they require trenching from the house to the discharge point, laying the pipe, backfilling, and restoring the lawn or landscaping. The benefit is that a buried line is out of sight, does not freeze as easily (it is below the frost line), and cannot be tripped over or knocked loose. For Southern Maryland homeowners who plan to keep the home long-term, a buried discharge line is worth the investment.

Factors That Affect Sump Pump Installation Cost in Southern Maryland

Location of the Pit

The sump pit should be installed at the lowest point in the basement, where water naturally collects. In many homes, this is a back corner away from the main living area. If the lowest point is in the center of the basement, under a finished area, or in a location that requires a long discharge pipe run, the cost increases. Every additional foot of discharge piping adds $5 to $15 for interior runs and $10 to $25 for buried exterior runs.

Foundation Type

Poured concrete floors are standard in Southern Maryland homes built after 1960. Older homes may have block or stone foundations with dirt floors, thin concrete slabs, or irregular floor surfaces. A dirt floor simplifies pit excavation (no concrete cutting) but may require additional basin stabilization. A thick concrete floor (5 to 6 inches, found in some commercial-grade or newer construction) costs more to cut.

Water Table Height

Homes in low-lying areas of Calvert County near the Patuxent River, along the Chesapeake Bay waterfront, near Breton Bay in St. Mary's County, or in the bottomland along Mattawoman Creek in Charles County often have a water table that sits within a few feet of the basement floor. In these locations, the pit fills with water during excavation, the pump may cycle frequently (every few minutes during wet season), and a higher-capacity pump is necessary. A 1/2 horsepower pump rated for high-volume, continuous duty costs $100 to $300 more than a standard 1/3 horsepower unit but is the right choice for these conditions.

Discharge Distance and Route

The discharge pipe must carry water far enough from the house that it does not circle back to the foundation. In Southern Maryland's clay soil, water dumped close to the house soaks into the clay, saturates the soil around the foundation, and re-enters the drainage system, creating an endless loop that runs the pump constantly and wears it out prematurely. The discharge point should be at least 10 feet from the foundation, and 20 feet or more is better. A longer run costs more for piping and labor.

If the discharge exits on a slope that drains away from the house, a simple above-ground extension works. If the yard is flat or slopes toward the house, a buried line to a pop-up emitter, dry well, or storm drain connection is necessary, and costs $250 to $2,000 depending on the distance and complexity.

Permits and Code

Sump pump installation typically does not require a building permit in Calvert, St. Mary's, or Charles County, but the discharge must comply with local stormwater regulations. Discharging sump pump water into the sanitary sewer is prohibited. Discharging onto a neighboring property or into a road right-of-way without authorization can create liability issues. A reputable contractor routes the discharge to your own property's grade or to an approved stormwater connection.

The Southern Maryland Water Problem: Why You Need a Sump Pump

Understanding what makes this region uniquely prone to basement water intrusion helps you appreciate why a sump pump is not a luxury, it is essential equipment, like a water heater or an HVAC system.

Clay Soil That Holds Water Like a Sponge

Southern Maryland sits on the Atlantic Coastal Plain, and the dominant soil formations, Monmouth, Matawan, and Nanjemoy clays, are dense, heavy, and slow-draining. When it rains, the clay absorbs water slowly and releases it even slower. Water pools on top of the clay layer, saturates the fill soil around your foundation, and builds hydrostatic pressure, the force of water pushing against a surface. That pressure pushes water through every crack, cold joint, and pore in the concrete. The floor-wall joint, where the basement floor meets the foundation wall, is the most common entry point because it is never fully bonded, the floor and the wall are separate pours.

A sump pump paired with an interior French drain catches this water at the perimeter of the basement and removes it before it spreads across the floor. Without a pump, the water has nowhere to go. It sits, rises, and eventually covers the floor. If you have read our guide on basement waterproofing cost in Southern Maryland, you know that the interior French drain and sump pump combination is the industry standard for managing this exact problem.

High Water Table

Large portions of the tri-county area have a seasonally high water table. During the wet months, October through April, the water table rises as rain saturates the soil and groundwater levels climb. In low-lying areas, near rivers and creeks, and along the Bay shoreline, the water table can rise to within a few feet of the basement floor. When it rises above the floor level, hydrostatic pressure pushes water up through the floor itself, not just through the walls. This is the condition where a sump pump is absolutely critical. No amount of crack sealing, waterproof coating, or exterior grading can stop water that is being pushed up through the slab by the water table underneath it. Only a sump system, collecting that water in a pit and pumping it out, solves this problem.

45 to 50 Inches of Rain Per Year

Southern Maryland receives 45 to 50 inches of rain annually, well above the national average of 30 inches. The rain is distributed across the year but arrives in concentrated events, summer thunderstorms can drop 1 to 2 inches in a single hour, tropical systems can deliver 4 to 8 inches in a day, and slow-moving fall and winter systems can saturate the soil over multiple days of steady rain. Each of these events produces a surge of water that reaches the foundation, and the sump pump must be ready to handle it.

Hurricane Season and Storm-Related Power Outages

Southern Maryland is in the hurricane and tropical storm impact zone. Every season brings the threat of heavy rain, high winds, and prolonged power outages. Hurricane Isabel in 2003 left parts of the tri-county area without power for one to two weeks. Tropical Storm Lee in 2011 dumped 10 or more inches of rain. These events test sump pump systems to their limits, and a system without battery backup fails completely when the power goes out during the storm that is pouring water into the basement.

This is why every section of this guide emphasizes battery backup. It is not an upsell. It is not an optional accessory. In Southern Maryland, a sump pump without battery backup is a sump pump that will fail during the worst storms of the year.

Creek and Bay Proximity

Homes near tidal creeks, the Patuxent River, the Potomac River, and the Chesapeake Bay face an additional challenge: tidal influence on the water table. High tides and storm surges raise the water table in adjacent land, and homes within a few hundred yards of tidal water can see their sump pumps cycle more frequently during high-tide events even without rain. These homes benefit from higher-capacity pumps and battery backup systems that can handle sustained, frequent cycling.

Signs You Need a Sump Pump

Some homeowners know they need a sump pump because they have already experienced a flooded basement. Others have warning signs that a problem is developing. These are the conditions that indicate a sump pump installation should be on the near-term plan.

Water on the basement floor after rain. Any standing water, puddles, or wet streaks on the floor after a rain event means water is entering the basement. The source may be wall seepage, floor-wall joint seepage, or water rising through the slab. All of these conditions are managed by a sump pump system.

Efflorescence on basement walls. White, chalky mineral deposits on the foundation walls indicate that water is migrating through the concrete and depositing dissolved minerals as it evaporates on the interior surface. This is a sign of chronic moisture, the wall is wet even when you do not see standing water.

Musty odor in the basement. A persistent musty smell indicates elevated humidity and likely mold or mildew growth. Basements in Southern Maryland naturally have higher humidity, but a musty odor beyond normal dampness points to an active moisture source that needs management.

A high water table revealed during other work. If a plumber, HVAC technician, or foundation contractor has dug in your basement and hit standing water a few feet below the floor, you have a high water table, and a sump pump is the appropriate response.

Visible cracks with water staining. Cracks in the basement floor or walls that show water staining, rust marks, or active seepage indicate that water has found a path into the basement and will continue using it.

Your neighbors have sump pumps. Groundwater conditions are local. If the homes on your street have sump pumps, the water table and soil conditions in your area warrant one. This is especially true in developments where homes share similar elevations and soil profiles.

What to Expect During Sump Pump Installation

New Installation: 1 to 2 Days

Morning, Day 1. The crew arrives and identifies the optimal pit location, typically the lowest corner of the basement, where water naturally collects. If an interior French drain is being installed simultaneously (a common pairing), the pit location is chosen at the terminus of the drain system. The crew sets up dust containment around the work area.

Midday, Day 1. A concrete saw cuts the floor at the pit location, creating a 24- to 30-inch diameter opening. The cut concrete is removed and the soil below is excavated by hand to a depth of 24 to 30 inches. In Southern Maryland's clay soil, this is heavy, slow work. If the water table is high, water fills the pit during excavation and must be pumped out to continue digging. The sump basin is placed in the pit, leveled, and backfilled with gravel around the outside.

Afternoon, Day 1. The pump is placed in the basin, the discharge pipe is connected, and the interior discharge piping is routed to the wall penetration point. The check valve is installed on the discharge pipe above the pump to prevent water from flowing back into the pit when the pump cycles off. The electrical connection is made, either to an existing dedicated outlet or a new circuit run by an electrician.

Day 2 (if needed). The exterior discharge piping is installed, either run above ground to a suitable discharge point or trenched and buried for a cleaner installation. The concrete floor around the basin is patched and finished. The system is tested by filling the pit with water and verifying that the pump activates, the discharge flows properly, the check valve holds, and the float switch shuts the pump off at the correct level. If a battery backup is being installed, it is set up and tested as well.

You can stay in the house during the work. The basement is the only area affected. Concrete cutting produces dust, the crew should seal off HVAC returns and use dust barriers, but the rest of the house is livable.

Pump Replacement: 1 to 2 Hours

A pump replacement is a quick job. The old pump is disconnected, removed, and the new pump is lowered into the existing basin, connected to the existing discharge pipe, and tested. A plumber or waterproofing contractor handles this in 1 to 2 hours. The cost is primarily the pump itself plus $200 to $450 in labor.

Sump Pump Maintenance: Keeping Your System Reliable

A sump pump is a mechanical device that runs intermittently, sits in water, and is expected to work instantly during the worst weather of the year. Regular maintenance is the difference between a pump that protects your basement for 12 to 15 years and a pump that fails at 5 years during a storm.

Quarterly Pump Test

Pour a 5-gallon bucket of water into the sump pit every 3 months. Watch the pump activate, run, and shut off. Listen for unusual noises, grinding, rattling, or labored running. Verify that water exits the discharge pipe outside the house. This 5-minute test confirms the pump works before you need it during a storm. If the pump does not activate, check the power, the float switch, and the GFCI outlet (which may have tripped).

Annual Discharge Line Inspection

Inspect the discharge pipe from the pump to the exterior exit point. Look for leaks at joints, check that the exterior outlet is clear of debris, dirt, ice, or animal nests, and confirm that the discharge flows away from the house. In winter, check the exterior discharge for ice blockage, a frozen discharge line causes the pit to fill and overflow. A discharge line that terminates above grade and freezes shut is the most common cold-weather sump pump failure in Southern Maryland. An above-ground discharge should have a freeze guard or weep hole that allows water to exit even if the end freezes.

Battery Backup Maintenance

If you have a battery backup system (and you should), test it every 6 months by unplugging the primary pump and pouring water into the pit to activate the backup. Check the battery charge level on the control panel. Replace the battery every 3 to 5 years, the control panel alarm or indicator light signals when the battery has lost capacity. A backup system with a 5-year-old battery may have only 50 to 60 percent of its original runtime, which may not be enough to get through a long outage. Battery replacement costs $100 to $200 for the battery itself.

Pit Cleaning

Sediment, gravel fines, and debris accumulate in the sump pit over time. Every 1 to 2 years, remove the pump, scoop out accumulated sediment from the bottom of the basin, rinse the intake screen, and replace the pump. A clogged intake screen reduces pump performance and can cause the pump to overheat. A basin full of sediment reduces the water holding capacity of the pit, which causes the pump to cycle more frequently and wear faster.

Float Switch Check

The float switch is the device that tells the pump when to turn on and off. Tethered float switches (a float on a short cord) can snag on the discharge pipe, the basin wall, or the pump itself, preventing the float from rising and the pump from activating. Vertical float switches (a float that slides up and down a rod) are less prone to snagging but can stick if sediment accumulates on the rod. Check that the float moves freely every time you test the pump.

Sump Pump and Basement Waterproofing: The Complete System

A sump pump is one component of a basement waterproofing system, not a standalone solution. The pump removes water from the pit, but something has to direct the water to the pit in the first place.

In most Southern Maryland homes with active water intrusion, the complete system is an interior French drain (a perforated pipe in a gravel-filled channel cut into the basement floor along the perimeter) that collects water from the foundation walls and floor-wall joints and routes it by gravity to the sump pit, where the pump ejects it. Without the French drain, the sump pump only collects water that happens to flow to the pit location, water entering at the opposite end of the basement may never reach the pump.

If you are installing a sump pump to address an active water problem, discuss interior drainage with your contractor at the same time. Installing the French drain and sump pump together is more efficient (and often cheaper per component) than installing them separately. We cover interior drain system costs in detail in our basement waterproofing cost guide.

If you already have an interior drain system and your sump pump has failed or is aging, a pump replacement ($300 to $700) puts the existing system back in working order without the cost of a new pit or piping.

Frequently Asked Questions

How much does it cost to install a sump pump in Southern Maryland? A new sump pump installation with pit excavation costs $800 to $2,500 in Calvert, St. Mary's, and Charles County, with most homeowners paying around $1,400. Replacing an existing pump costs $300 to $700. Adding a battery backup to an existing system costs $200 to $500.

How long does a sump pump last? A quality submersible sump pump lasts 10 to 15 years. Pedestal pumps last 5 to 15 years. Most primary pumps in active use should be replaced every 7 to 12 years, before they fail during a storm. The battery in a backup system should be replaced every 3 to 5 years regardless of whether the pump itself has been used.

Do I need a battery backup sump pump in Southern Maryland? Yes. Southern Maryland experiences multiple power outages per year from thunderstorms, tropical systems, and winter storms. The storms that produce the most water are the same storms that knock out power. A primary sump pump without battery backup fails during exactly the conditions it is designed to protect against. A battery backup costs $200 to $500 installed and prevents thousands of dollars in flood damage.

What size sump pump do I need? Most Southern Maryland homes are well served by a 1/3 to 1/2 horsepower submersible pump. Homes with heavy water intrusion, a high water table, or a long discharge line (which requires more lift) need a 1/2 horsepower pump. A pump rated for 2,500 to 3,500 gallons per hour at 10 feet of vertical lift covers the majority of residential applications.

Can I install a sump pump myself? Possible, but not recommended for a new installation. Cutting concrete, excavating a pit in clay soil, sizing the pump correctly, routing the discharge, and handling the electrical work requires tools and experience that most homeowners do not have. A mistake, an undersized pump, a poorly graded discharge, a float switch that jams, reveals itself during a storm, when the consequences are an emergency. Pump replacement in an existing pit is a more feasible DIY project for a handy homeowner with plumbing experience.

How often should I test my sump pump? Every 3 months. Pour a 5-gallon bucket of water into the pit and confirm the pump activates, runs, and shuts off. Test the battery backup every 6 months by unplugging the primary pump and triggering the backup. Testing takes 5 minutes and confirms the system works before the next storm.

Where should the sump pump discharge? At least 10 feet from the foundation, and 20 feet is better. The discharge should direct water away from the house and away from neighboring properties. In Southern Maryland's clay soil, water dumped close to the foundation soaks into the clay and migrates back to the foundation wall. A buried discharge line to a pop-up emitter or daylight drain is the cleanest and most reliable solution.

My sump pump runs constantly. Is that normal? It depends. During and after heavy rain events, frequent cycling (every few minutes) is normal in areas with a high water table. Constant running during dry weather is not normal, it indicates a high water table that never drops below the pump activation level, a stuck float switch, or water re-entering the system because the discharge is too close to the house. If the pump runs constantly, have it inspected. A pump that runs continuously wears out in 2 to 3 years instead of 10 to 15.

Do I need a permit to install a sump pump? Sump pump installation typically does not require a building permit in Calvert, St. Mary's, or Charles County. Electrical work for a new dedicated circuit may require an electrical permit depending on the jurisdiction. Your contractor handles any required permits as part of the project.

When is the best time to install a sump pump? Fall, September through November. Summer storms have revealed any weaknesses in your current system, and the wet season is ahead. Installing in fall means the system is tested and ready before winter freeze-thaw cycles and spring rains push the water table to its peak. Emergency installation during an active flood is more expensive, more stressful, and produces a worse outcome than planned installation during dry conditions.

Basement taking on water? Gray & Sons Contracting has been protecting Southern Maryland homes for 50 years. We will assess your basement, recommend the right sump pump system, and install it right the first time. Get a Free Estimate