Homeowners in Orem, UT often ask what it costs to waterproof a basement, and the honest answer starts with a different question: where is the water coming from? A crack that weeps after snowmelt, a window well that fills in a thunderstorm, and groundwater pressing up through the slab are three different problems with three different fixes. A bid that does not name the source is a bid for a guess.
This guide explains the cost drivers, the difference between a plumber's scope and a foundation contractor's scope, and how to compare two bids line by line. It carries no dollar figures, since they would not survive contact with your actual house.
Find the water source before you price a fix.
Good basement waterproofing starts with a diagnosis, because water enters a basement from a few places. Surface water runs along the ground, collects against the foundation and finds a crack or a window well. Groundwater rises from below and pushes through the floor-wall joint or the slab. Plumbing leaks, such as a failed supply line or a water heater, add water from inside.
The first job is to sort these. A moisture stain in one corner after a storm points to surface water, while a damp floor along a wall in spring points to groundwater. A wet spot that appears with no rain at all is a reason to have a plumber look at the supply lines, and a plumber's leak check can rule an interior pipe in or out before anyone digs.
A first check costs nothing. After a rain, look at where the downspouts discharge and whether the soil slopes toward the wall. Water pooling close to the foundation is a surface problem you can often reduce before anyone digs.
Waterproofing approaches and what each one costs you in scope.
Rather than prices, this table shows what each approach involves, which is what actually moves the total.
| Approach | What it does | Cost drivers | Honest limit. |
|---|---|---|---|
| Grading and gutter fixes | Moves roof and ground water away from the foundation | Length of the run, soil work, downspout extensions | Does nothing for groundwater under the slab. |
| Crack sealing | Fills a specific crack from the inside | Number and length of cracks, wall access | A patch can fail if the wall keeps moving. |
| Interior drain and sump | Collects water at the floor-wall joint and pumps it out | Linear feet of drain, concrete cutting, pit and pump, discharge route | Manages water but does not stop it from reaching the wall. |
| Exterior excavation and membrane | Stops water at the outside of the wall | Depth, landscaping, utilities in the way, wall length | Most disruptive, and a foundation contractor's scope more than a plumber's. |
| Window well drainage | Gives well water a path away from the opening | Number of wells, depth, tie-in to a drain | Needs a working discharge to help. |
Most real projects combine two of these, which is why one-line bids are hard to compare.
Orem, UT: shallow groundwater and the August 2024 storm
Utah Geological Survey guidance (Public Information Series 105, 2023) describes shallow groundwater as water generally within 10 feet of the surface, with the highest odds in low valley ground close to rivers, streams, lakes and reservoirs. It can flood basements and damage buried utility lines.
The western, lower-lying parts of Orem sit in a valley near Utah Lake, so a basement that stays damp in spring deserves a groundwater question, and the UGS publishes hazard maps at geology.utah.gov that you can check for your area.
The same guidance says sump pumps should be inspected and maintained annually, in winter, before shallow groundwater typically becomes a problem. Put that on a calendar, since a pump that has sat idle for months is the one most likely to stick when it is needed.
In August 2024, a rainstorm of about 1 inch in roughly 30 minutes overwhelmed Orem's storm drainage system, and the city's public works director described it as greater than a 100 year storm event.
A surface-water problem like that is different from a plumbing problem, and it can point toward grading, window wells and downspouts before a full interior system. Standard homeowners insurance does not cover groundwater flooding, so check your own policy for what it covers before you decide how much to spend.
Why the sump pump line item matters so much.
A sump pump is the part of a basement system that runs when conditions are at their worst. It sits in a pit, lifts collected water and sends it out through a discharge line, and it needs power and a working check valve to do that. If any piece fails, the rest of the system floods the basement anyway.
When you read a bid, look at the pump, the pit, the discharge route and any battery backup as separate lines. A battery backup or a second pump costs more up front and covers the case where the power goes out during the storm that also fills the pit. If a pump you already have is the weak link, sump pump repair may solve the problem for far less than a new interior system.
If the water appears with no rain at all, call the number on this page and have a plumber check the supply lines first.
Call (385) 488-1892.What a plumber can and cannot do about a wet basement.
A plumber can find and repair leaking pipes, install and repair a sump pump and its discharge plumbing, and tie drains to the right place. Excavating around a foundation, repairing structural cracks, regrading a yard and applying exterior membranes belong to a foundation or excavation contractor.
If a bid from either trade covers work the other trade normally does, ask who holds responsibility for the connected work. A sump pit installed by one contractor and a drain installed by another can leave a gap that neither will fix.
The same split applies for homeowners in nearby Lindon and Vineyard, so ask any contractor which side of the line each line item falls on.
How to compare two waterproofing bids.
Put both bids next to each other and mark each line item as present, absent or different.
- Does each bid name the suspected water source, and say how the contractor decided?
- Is the work on the inside, the outside or both, and how many linear feet of wall does it cover?
- Is the sump pit, pump, check valve and discharge route itemized, or lumped together?
- Does either bid include a battery backup or a second pump?
- Who restores the concrete, drywall, landscaping and flooring that the work disturbs?
- What does the warranty cover, who honors it and is it transferable if you sell the house?
- What is excluded: permits, utility locates, groundwater that rises later or new cracks?
What changes the total, in plain terms.
Length and depth drive the labor. A long wall run, deep footings or a wall finished with drywall all add hours, because concrete must be cut, dug or exposed. Access matters as well, since a cramped crawlspace or a yard full of landscaping slows the crew.
Water volume drives equipment. A basement with a steady inflow needs a bigger pump, a larger pit and a drain that can carry it. Finishes drive repair cost, because a basement with carpet, drywall and built-ins costs more to open and restore than a bare concrete floor.
Finally, expect the permit and inspection steps to appear somewhere. Permit rules vary by job, so ask the contractor which items need a permit and who handles it.
Common questions
Because the price depends on the water source, the wall length, the access and what is finished. A phone price for a job nobody has seen is a guess. A contractor should look at the basement and name the source before quoting.
It can be. Utah Geological Survey guidance says shallow groundwater, generally within 10 feet of the surface, is more likely in low valley areas and near lakes and rivers, and that it can flood basements. Orem sits near Utah Lake, so ask a contractor how groundwater was ruled in or out.
Homeowners policies typically cover sudden and accidental damage, such as a burst pipe, and typically do not cover groundwater flooding or gradual seepage. The Utah Geological Survey says standard homeowners insurance excludes groundwater flooding, so read your own policy.
Not always. If water arrives from the surface, grading and gutter fixes may be enough. If groundwater collects below the slab, a sump system is a common answer, and it should be inspected each winter.
The storm overwhelmed the storm drainage system, so a damp basement after that storm may have been a surface-water problem and not a groundwater one. That would point toward grading, downspouts and window wells before an interior drain.
Sources and references
- Utah Geological Survey Public Information Series 105, Shallow Groundwater Hazard in Utah (2023), https://ugspub.nr.utah.gov/publications/public_information/pi-105.pdf.
- Fox 13 Salt Lake City, August 14, 2024, Orem storm coverage.