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How Much Does That Slab Leak Really Cost?

A photo of dry, cracked ground illustrates the process that happens with some Los Angeles slab leaks.

If your home has a concrete slab foundation, you may be vulnerable to slab leaks. Slab foundations are built atop a bed of crushed gravel above a layer of sewer lines and pressurized piping. When the pipes and sewer lines beneath the foundation begin to break down, it can cause extensive damage. 

Slab leaks are the most difficult leaks to detect because of the challenges involved with accessing the foundation. When you suspect a slab leak, it can be tempting to ignore the feeling to avoid the repair costs. Unfortunately, slab leaks only occur after long periods of corrosion, so it’s essential to address them as soon as possible. They can cause your foundation to crumble if left unattended.

To help demystify the process, we’re going to provide you with some general cost estimates. In order to determine the overall cost of a slab leak, we need to look at two factors: detection and repair. 

How much does it cost to find my slab leak?

One of the key variables in slab leak repair costs is whether or not you’ve hired a leak detection specialist. When plumbers have to locate the source of the leak during the repair process, it often results in higher overall costs because they may be forced to remove more foundation than necessary. 

Since there are so few visible signs of slab leaks, special equipment is required to locate them noninvasively. Using tools such as robotic cameras and noise correlators, it’s possible to find the origin of the leak without destroying pipes. Leak detectors specialize in this process, which typically costs between $150 and $400.

How much does it cost to repair my slab leak?

According to data from HomeAdvisor, slab leak repair costs anywhere from $1,900 to $6,710. This cost reflects the difficulty of breaking through the foundation to reach the leak. The full repair process will typically involve excavation around a home’s foundation, installing new tile drains, and filling any cracks. Furthermore, during the course of the project, workers often stumble on previously undiscovered water damage, which can add to the overall expense.

What factors into the slab leak repair cost?

There are many situations that can influence the repair costs. We’ve provided some estimates for common scenarios that homeowners encounter.

  • If you need a new slab foundation poured – New slab foundations can cost between $3,600 and $7,200 for an average-sized home (or about $6 per square foot.)
  • If you need to repair a water main – This cost can vary between $330 and $1,360, although $850 is considered average.
  • If you require a slab leak reroute – The price for this service is usually between $300-$1500, and rerouting can help you avoid the higher cost of a full slab replacement.
  • If the leak comes from the hot water line – Typically, repairing the hot water line ranges from $630 to $4,400, with an average cost of $2,280.

Why work with the Waterboy for slab leak detection?

At The Waterboy, we have years of experience with slab leaks and we know how to rule out other leak possibilities to get to the heart of the problem. Water damage of any kind is stressful for homeowners. That’s why we work hard to guide you through the process: from the initial leak detection to the final repairs! We’ve earned a reputation for five-star service because of our commitment to our clients and our previous success in identifying Los Angeles slab leaks.


Proud Providers of Slab Leak Detection in Los Angeles with Service Available in: Sherman Oaks, Van Nuys, Encino, Tarzana, Northridge, Chatsworth, Granada Hills, Porter Ranch, Studio City, Woodland Hills, West Hills, Calabasas, Agoura Hills, Simi Valley, Moorpark, Newbury Park, Thousand Oaks, Camarillo, Oxnard, Ventura, Malibu, Santa Monica, Pacific Palisades, Beverly Hills, West Hollywood, Sylmar, Glendale, Pasadena, San Fernando, Burbank, Palmdale, Lancaster, Long Beach, Manhattan Beach, Redondo Beach, Torrance, Culver City, Ranch Palos Verdes, Carson, Lakewood, Gardena, Compton, Valencia, Santa Clarita. Los Angeles County, Ventura County, Orange County, San Bernardino County.

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The Waterboy

We provide fast, efficient and exceptional service while upholding the highest standards of integrity. Regardless of the severity of your leak, we’ll work tirelessly to identify the problem and recommend a trusted, affiliated restoration professional.

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