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How Much Does Foundation Repair Cost in Seattle, WA? [2025 Data]
Normal Range: $2,625 - $10,466
Foundation repair in Seattle, WA costs an average of $6,455, but it can range from $2,625 to $10,466, depending on your foundation type and the extent of the issue.
How we get this data
fstop123 / E+ / Getty Images
fstop123 / E+ / Getty Images
Cost Insights
A higher cost of labor and an overall above-average cost of living make foundation repair in Seattle significantly more expensive than in other cities.
In addition to permit costs, Seattle homeowners may need to pay a sales tax rate of 10.40% for the labor needed for this project.
While prices for foundation repair in Seattle can be higher than average, homeowners do get some relief from the fact that the city's clay soil means most homes have pier and beam or slab foundations that are generally less expensive to repair compared to basement foundations.
With an overall higher cost of living, Seattle homeowners will need to budget for a higher-than-average foundation repair cost in Seattle if they've noticed worrying issues. While most Seattle homeowners are paying around $6,455, the range for this project is between $2,625 and $10,466. Factors that include the type of foundation issue and the severity of foundation damage will determine how much it will cost to get your foundation fixed. Keep reading to learn what to expect.
Foundation Repair Cost Factors
When shopping for quotes for Seattle home foundation repairs, costs are generally broken down between the number of hours needed for labor and any materials needed. Repair rates for different parts of a foundation can vary based on the amount of excavation and structural work needed. With the average foundation repair cost in Seattle ranging from $5 to $17 per square foot, repairs here are much higher compared to the national average of $1.50 to $12 per square foot. For a homeowner with a 1,500-square-foot foundation, the average repair cost might fall between $7,500 and $25,500.
Foundation Size
Foundation size directly impacts the cost of fixing it. The larger the home, the larger, heavier, and more structurally complex the foundation tends to be. Large foundations also often require more equipment and materials for repairs.
The per-square-foot cost of foundation repairs ranges between $1.50 and $12 per square foot on average. This range accounts for everything from minor sealant upgrades to full epoxy replacement. Prices can go much higher per square foot for certain materials, but assume this range on average when considering the full area of your home's foundation.
| Foundation Size (Sq. Ft.) | Average Cost |
|---|---|
| 500 | $2,500–$6,000 |
| 1,000 | $5,000–$17,000 |
| 1,500 | $7,500–$25,500 |
| 2,000 | $10,000–$34,000 |
| 2,500 | $12,500–$42,500 |
| 3,000 | $15,000–$51,000 |
Foundation Type
Your options for foundation repairs will vary based on your home’s foundation type, whether it’s a basement, a concrete slab, cinder blocks, bricks, or a crawl space. Prices for each foundation type also depend on the type and extent of damage since there’s no single solution for all foundation problems.
With Seattle's clay terrain, basements aren't as popular here compared to other places around the country. Most homes in the city have slab or pier and beam foundations that can generally be less expensive to repair compared to basement foundations. However, the sloping that is common on properties throughout the city can make excavation costs needed during repairs higher.
| Foundation Type | Repair Cost | Difficulty Level |
|---|---|---|
| Concrete slab | $450–$19,000 | Low |
| Cinder block and brick | $3,000–$38,000 | Medium |
| Basement | $4,500–$21,500 | High |
| Pier and beam | $1,200–$18,000 | Low |
| Stem wall | $1,300–$21,000 | Low |
Type of Repair
The cost of foundation repair can depend on the repair method used to fix your problem. Many types of foundation repair are available, each requiring specific materials and experience. You can hire a foundation repair pro near you to fix most issues.
| Repair Type | Average Cost |
|---|---|
| Interior waterproofing | $2,000–$10,000 |
| Exterior waterproofing | $3,500–$10,000 |
| Lifting | $30,000–$50,000 |
| Slab-jacking/leveling | $1,500–$4,000 |
| Piering/stabilizing | $2,500–$9,900 |
| Reinforcement | $7,500–$18,000 |
Type of Issue
Every foundation problem comes with a unique price tag, particularly when a contractor has to take multiple approaches to fix it. Foundation crack repair costs, for example, depend on whether the problem stems from drainage problems, soil instability, or poor installation.
Leaks may require contractors to add a range of waterproofing methods to your foundation or investigate the source of the water from inside or outside your home. In more extreme cases, a bowing wall or sinking foundation will require major reinforcement or even replacement.
| Type of Issue | Average Cost |
|---|---|
| Drainage | $1,200–$18,000 |
| Cracks | $700–$4,000 |
| Leaks | $2,100–$10,200 |
| Differential settlement (instability) | $10,000–$35,000 |
| Bowing | $6,500–$13,000 |
| Reinforcement | $2,300–$6,900 |
Foundation Repair Pro Costs
Expect a local foundation repair pro in Seattle to charge per square foot for most foundation repair methods. If a pro charges hourly, the hourly rate for foundation repairs in Seattle is generally between $235 and $300 per hour.
Permits
In Seattle, most warning signs of foundation issues that require repairs will also require permits. While minor and non-structural repairs may not require permits, work that includes underpinning, lifting, or restoring structural integrity will need a permit from the Seattle Department of Construction and Inspections (SDCI). On average, a permit for this type of work can cost up to $200.
Tax
Seattle homeowners will need to budget for the fact that the city is one of the few places in the country where sales tax applies to construction labor, repairs, and maintenance on personal property. That means adding the sales tax rate of 10.40% to your budget.
Licensing and Certification Requirements
When setting their rates, Seattle foundation contractors factor in the time and cost required to become a registered Washington State contractor. In addition, companies that provide foundation repair in Seattle must obtain a Seattle business license.
Does Foundation Repair Affect Home Value?
Yes, getting your foundation professionally repaired can preserve the value of your home by ensuring that it can be safely and legally occupied. Homes with severely damaged foundations in Seattle may not be insurable or sellable in some cases.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
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