How much does a seismic retrofit cost in Sonoma County?
Built from 105 comparable filed projects in Sonoma County public records (Sonoma County Open Data), compiled 2026-07-27 — a filed reference, not a measured invoice total.
Excluded before the median is computed: placeholder and nominal-value filings, filings whose figure is a fee rather than a cost, commercial work types, non-residential properties, apartment-building and high-rise work, and low-confidence category matches.
Seismic retrofit projects filed in Sonoma County typically run about $5,550, with most between $4,000 and $7,000, based on 105 filings (Sonoma County public records, Sonoma County Open Data).
These are comparable filed projects in Sonoma County — a typical reference range, not a quote. Your project can land anywhere in the spread depending on scope, materials, and access.
Where the money goes
What moves the price
Common questions
What's the typical range for a seismic retrofit in Sonoma County?
Most seismic retrofit projects in Sonoma County run $4,000 to $7,000, with a median around $5,550, based on 105 filings of comparable filed work (Sonoma County public records, Sonoma County Open Data).
What is the seismic retrofit figure for Sonoma County based on?
Built from 105 comparable filed projects in Sonoma County public records (Sonoma County Open Data), compiled 2026-07-27 — a filed reference, not a measured invoice total. Excluded before the median is computed: placeholder and nominal-value filings, filings whose figure is a fee rather than a cost, commercial work types, non-residential properties, apartment-building and high-rise work, and low-confidence category matches.
How recent is this data?
These figures reflect comparable seismic retrofit projects filed in Sonoma County public records (Sonoma County Open Data), compiled as of 2026-07-27. They refresh as new filings are published.
What affects the cost of a seismic retrofit?
Scope, materials, finishes, the age and condition of the home, and site access. The spread above ($4,000–$7,000) reflects that range — your project can land anywhere in it.
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