How much does foundation repair cost in Mercer Island, WA?
US national rangeUpdated Prices checked October 20261 source
Foundation repair costs $2,225 to $8,133 nationally, typical $5,174. We have no documented price index for Mercer Island for this job, so this is the US national range from HomeAdvisor, checked October 2026.
US national range, not adjusted for this city
- Low
- $2,225
- Typical
- $5,174
- High
- $8,133
Foundation repair cost in Mercer Island, WA
We have no documented price index for Mercer Island for this job, so the table shows the US national range.
| Estimate | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| US national range | $2,225 | $5,174 | $8,133 | Per project: typical range of customer-reported repairs (HomeAdvisor) | October 2026 |
What drives the cost of foundation repair
Type of damage
Sealing cracks is the cheapest fix; sinking or bowing walls cost far more.
Foundation type
Basements usually cost the most to repair.
Home size
Larger areas need more piers or supports.
Repair method
Epoxy or polyurethane for cracks; steel or carbon fiber for structural work.
Engineer's report
A structural engineer's report runs $340 to $780.
Access and add-ons
Obstructed yards, waterproofing and drainage work add cost.
Permits and what's included in Mercer Island
Permit note
Structural foundation work usually needs a building permit and sometimes an engineer’s stamp. Ask your local building department for the fee.
Rules are set locally; confirm with Mercer Island’s building department.
What’s usually included
- Inspection and repair plan
- Materials (piers, anchors, epoxy or carbon fiber)
- Labor and site cleanup
Scopes vary. Get the scope in writing on every quote.
Get foundation repair quotes in Mercer Island
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Top-ranked foundation repair companies in Mercer Island
The top 3 of 133 foundation repair companies we rank for Mercer Island, WA, by CR Score. Paid placement never changes rank.
- #1Swift Masonry And Foundation RepairCR Score 625.0from 49 Google reviews
- #2Expert Masonry and Foundation RepairsCR Score 625.0from 62 Google reviews
- #3KG Basement Waterproofing SeattleCR Score 615.0from 34 Google reviews
Foundation repair cost in Mercer Island: questions
How much does foundation repair cost in Mercer Island, WA?
Do I need a permit for foundation repair in Mercer Island?
What affects the cost of foundation repair?
How many foundation repair companies serve Mercer Island?
What is usually included in the price?
Sources
Checked October 2026. Figures are estimates, not quotes.
- HomeAdvisor: Foundation repair cost · page updated June 20, 2026 · checked October 2026Primary source. Used for: Low, typical and high; drivers.
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