Seismic retrofit cost in LA?

$5K–$15K cripple-wall + bolt-down. EBB grant covers up to $3K.

Will retrofit lower my earthquake insurance?

Yes — most carriers 15-25% premium reduction.

Is soft-story mandatory in SF?

Yes for wood-frame 5+ unit buildings over garage/tuck-under.

$60K–$150K depending on units and parking depth.

California Seismic Retrofit.

Bolt the house to the foundation, brace the cripple wall, add hold-downs. Earthquake Brace + Bolt (EBB) grant up to $3K.

Bay seismic — soft-story on wood-frame-over-garage mandatory for 5+ units in SF. We engineer, permit, install.

Los Angeles

$5K – $25K

Standard EBB scope bottom; full soft-story top.

Timeline — 1–2 weeks active; permit 2–4 weeks.

Los Angeles Seismic Retrofit →

San Francisco Bay Area

$8K – $150K

Standard bolt + brace bottom; SF soft-story top.

Timeline — 2–10 weeks active; permit 4–12 weeks.

San Francisco Bay Area Seismic Retrofit →

Scope — what we deliver.

Engineer assessment
Permit
Cripple-wall bracing
Sill bolting + hold-downs
Inspection

Permits look different in LA vs the Bay.

Los Angeles — permit notes

LADBS permit; expedited for EBB.
EBB grant $3K rebate.
Engineer signs plans.
Inspection before close.

Bay Area — permit notes

City permit (SF DBI soft-story).
SF Soft-Story Program mandatory for 5+ units.
Engineer signs plans.
Multiple inspections.

How we think about seismic retrofit.

Structural work is the most expensive thing you can do badly and the cheapest thing you can do right. A correctly engineered shear wall, hold-down, or beam costs a few hundred dollars more than the wrong one and protects the building for its remaining life. We refuse to deviate from a stamped engineer's calc — the engineer's stamp is what protects the homeowner in a claim, not the contractor's experience.

California's seismic code has changed dramatically since 2010 and again since 2020 — most homes built before 1980 carry latent risk we can correct in a single retrofit pass. We treat foundation, framing, and shear as one system, never as separate trades.

The schedule, written out.

Week 0
Engineering site visit
Licensed structural engineer reviews existing, soils, slope, snake-camera at foundation cracks.
Week 1–4
Engineering + plans
Stamped calcs, framing plan, hold-down + shear schedule, foundation detail.
Week 4–8
Permit
City structural review — usually faster than full ADU plan check.
Week 8–10
Foundation + shear access
Selective demo, crawlspace prep, excavation if underpinning.
Week 10–14
Install
Anchor bolts, hold-downs, shear panels, cripple-wall bracing, structural framing, beam install.
Week 14–15
Inspection
Inspector verifies every hold-down and shear-nail pattern — common rejection point if subs cut corners.

Materials & assemblies.

Component	Default spec	Why
Anchor bolts	5/8" Simpson Titen HD or equivalent epoxy-set, 7" embed minimum	Old square-washer ½" bolts are not enough; full retrofit upsizes them.
Hold-downs	Simpson HDU or PHD with stamped placement at all shear-wall ends	Placement is the failure mode — wrong stud or wrong end = no hold-down at all.
Shear panels	15/32" structural-1 sheathing, 8d common nails @ 4"/12" or per calc	Air nails at the wrong PSI under-drive — every nail must be flush, not over.
Beams (LVL / PSL)	Engineered lumber per calc, with stamped connection hardware	Field-fabricated steel saddles are a frequent failure point — only use stamped connectors.
Foundation repair	Helical piles, push piers, or wide footings depending on soil + load	Choice is geotech-driven, not contractor-preference.

Hidden costs we flag up front.

Line item	Range	When it hits
Soils / geotech report	$4K–$12K	hillside, expansive clay, or new addition load
Excavation + shoring	$8K–$40K	underpinning a settled foundation
Plumbing + electrical re-route	$2K–$10K	foundation work cuts through existing services
Temporary support	$2K–$8K	interior shoring for beam install

cheaper alternatives

What we'd consider — and what we wouldn't.

Brace-only retrofit (no bolt-down)
Half the cost but only addresses cripple-wall, not sill movement — incomplete protection.
Carbon-fiber wall repair
Works for crack stabilization but doesn't add capacity for new load.
Owner-permit structural work
Not legal in most CA jurisdictions for residential — requires licensed contractor + engineer.

pitfalls — takeover-job patterns

Mistakes to avoid.

Pulling a permit without an engineer's stamp — almost every city now requires it for shear / beam / foundation
Cutting a notch in a joist or beam to fit plumbing — single most common code failure on rough inspection
Skipping the cripple-wall bracing on a pre-1980 raised foundation — biggest cost-to-benefit retrofit available
Believing 'the inspector will catch it' — the inspector verifies what's exposed, not what's already buried

Seismic Retrofit — Los Angeles.

Seismic Retrofit — Bay Area.

In short.

Seismic retrofit cost in LA?: $5K–$15K cripple-wall + bolt-down. EBB grant covers up to $3K.
Will retrofit lower my earthquake insurance?: Yes — most carriers 15-25% premium reduction.
Is soft-story mandatory in SF?: Yes for wood-frame 5+ unit buildings over garage/tuck-under.
SF soft-story cost?: $60K–$150K depending on units and parking depth.

More we build.

Got a seismic retrofit project in mind?

Send us the address. We'll pull local zoning, setbacks, and seismic retrofit feasibility before you spend on drawings.

Start a project →