- Earthquake retrofit usually costs $4,250 to $9,350, about $6,550 typical.
- Bolting a house to its foundation and bracing cripple walls.
What earthquake retrofit costs
Expect earthquake retrofit to cost between $4,250 and $9,350, with $6,550 as a typical figure. Bolting a house to its foundation and bracing cripple walls.
| Price | |
|---|---|
| Low end | $4,250 |
| Typical | $6,550 |
| High end | $9,350 |
Sources: Fixr and HomeAdvisor, combined as shown below. Local wages shift the typical price from about $5,647 in Arkansas to $8,061 in Hawaii.
What drives the price
- Foundation type. Raised foundations with cripple walls are the common retrofit.
- Home size. HomeAdvisor says about $3 to $7 a square foot on average.
- Engineering. Some homes need an engineered plan.
Earthquake retrofit cost by state
These state figures are Koira estimates. The labor share of the national price, about 60%, moves with each state's median wage for construction and extraction workers; materials stay at the national price. Use them to sanity-check a earthquake retrofit quote.
| State | Low | Typical | High |
|---|---|---|---|
| Alabama | $3,748 | $5,776 | $8,245 |
| Alaska | $4,938 | $7,611 | $10,865 |
| Arizona | $4,185 | $6,450 | $9,207 |
| Arkansas | $3,664 | $5,647 | $8,061 |
| California | $4,769 | $7,350 | $10,492 |
| Colorado | $4,320 | $6,658 | $9,505 |
| Connecticut | $4,767 | $7,348 | $10,488 |
| Delaware | $4,242 | $6,538 | $9,332 |
| District of Columbia | $4,702 | $7,247 | $10,345 |
| Florida | $3,814 | $5,877 | $8,390 |
| Georgia | $3,832 | $5,906 | $8,431 |
| Hawaii | $5,231 | $8,061 | $11,507 |
| Idaho | $4,105 | $6,326 | $9,031 |
| Illinois | $5,150 | $7,938 | $11,331 |
| Indiana | $4,349 | $6,702 | $9,568 |
| Iowa | $4,246 | $6,545 | $9,342 |
| Kansas | $4,054 | $6,248 | $8,919 |
| Kentucky | $3,976 | $6,127 | $8,746 |
| Louisiana | $3,839 | $5,916 | $8,445 |
| Maine | $4,283 | $6,601 | $9,423 |
| Maryland | $4,264 | $6,572 | $9,381 |
| Massachusetts | $5,018 | $7,733 | $11,039 |
| Michigan | $4,320 | $6,658 | $9,505 |
| Minnesota | $4,808 | $7,411 | $10,579 |
| Mississippi | $3,704 | $5,709 | $8,149 |
| Missouri | $4,344 | $6,694 | $9,556 |
| Montana | $4,311 | $6,643 | $9,483 |
| Nebraska | $4,003 | $6,170 | $8,807 |
| Nevada | $4,344 | $6,694 | $9,556 |
| New Hampshire | $4,273 | $6,586 | $9,401 |
| New Jersey | $4,846 | $7,468 | $10,661 |
| New Mexico | $3,837 | $5,913 | $8,441 |
| New York | $4,715 | $7,267 | $10,373 |
| North Carolina | $3,815 | $5,880 | $8,394 |
| North Dakota | $4,319 | $6,657 | $9,503 |
| Ohio | $4,361 | $6,722 | $9,595 |
| Oklahoma | $3,782 | $5,829 | $8,321 |
| Oregon | $4,531 | $6,984 | $9,969 |
| Pennsylvania | $4,292 | $6,615 | $9,442 |
| Rhode Island | $4,400 | $6,781 | $9,679 |
| South Carolina | $3,822 | $5,891 | $8,409 |
| South Dakota | $3,847 | $5,928 | $8,462 |
| Tennessee | $3,863 | $5,954 | $8,500 |
| Texas | $3,806 | $5,865 | $8,372 |
| Utah | $4,148 | $6,392 | $9,125 |
| Vermont | $4,258 | $6,562 | $9,368 |
| Virginia | $4,117 | $6,345 | $9,058 |
| Washington | $4,933 | $7,603 | $10,853 |
| West Virginia | $4,167 | $6,422 | $9,168 |
| Wisconsin | $4,425 | $6,820 | $9,736 |
| Wyoming | $4,259 | $6,564 | $9,370 |
Cities inside a state can run well above or below the state figure.
How we got these numbers
| Guide | Range | Average | Use |
|---|---|---|---|
| Fixr | $5,000 to $10,000 | $7,000 | Counted |
| HomeAdvisor | $3,489 to $8,676 | $6,082 | Counted |
How the earthquake retrofit range is combined: low end from the middle of the guides' lows, high end from the middle of their highs, typical from the middle of their averages (a range's midpoint where no average is given). Figures read on each guide's page on October 9, 2026.
Labor share used: 60%. None of the guides splits labor out for this job, so this share is Koira's working assumption for radon, asbestos and lead work. State factor: the state's median hourly wage for construction and extraction workers over the national $28.63 (BLS, May 2025), kept between 0.7 and 1.4.
For contractors: price this job in Koira
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Sources: Fixr, earthquake retrofit cost; HomeAdvisor, earthquake retrofit cost; BLS Occupational Employment and Wage Statistics, May 2025 (state and national files). Prices checked October 9, 2026. More for your trade: how the trade runs on Koira.