Updated: May 11, 2026
Location and Projects
Address
6523 California Ave SW, Seattle, WA, 98136
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Stronghome Seismic Construction
Stronghome Seismic Inc operates throughout the Seattle area, focusing on seismic retrofitting for residential properties. The company specializes in improving earthquake resistance for homes, including reinforcement of foundations, cripple walls, and sheer walls. Projects include structural upgrades for older homes in neighborhoods across Seattle, with attention to the specific needs of houses built before modern seismic codes. Stronghome Seismic handles all aspects of the retrofit process, from initial assessment and engineering to construction and inspection coordination. The team is experienced in navigating the permitting process within the City of Seattle and tailoring solutions for varying foundation types found in local housing stock. Stronghome Seismic has been active in the region for 7 years, emphasizing proven retrofit methods designed to meet current seismic safety standards.
Stronghome Seismic Inc Services
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Stronghome Seismic Inc Contact Information
Phone Number: (507) 259-3980
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Address: 6523 California Ave SW, Seattle, WA 98136
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Stronghome Seismic Inc Seattle
Quality
107
94th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Stronghome Seismic Inc has a BuildZoom score of 107, which places them above 94% of 128,670 contractors in Washington.
Activity
|
15 projects
|
2025 |
|
8 projects
|
2024 |
|
4 projects
|
2023 |
Our building permit records indicate that Stronghome Seismic Inc has worked on at least
27.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Pricing
|
2 projects
|
< $5k |
|
6 projects
|
$5k-$20k |
The typical size of their permits is approximately $6,405. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Building Permits by Stronghome Seismic Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Type: building single family class: alteration to structure or system zamora & torres seismic retrofit-this project is a voluntary seismic retrofit. the project includes bolting the house to the foundation adding hold downs adding sheer wall and adding framing clips to the top plate - rim joist connection. all work will be done from inside the lower level of the home
Valuation:
N/A
Permit #:
BSF25-03190
Status:
final
Fee:
$524
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit at single family dwelling. the project includes bolting the sill plate to the foundation and adding framing clips to the top plate-rim joist connection. all plans are engineer designed and stamped. all work will be done from inside the lower level of the home
Valuation:
$4,788
Permit #:
BLDRA25-0300
Status:
final
Fee:
$308
Permit Type:
Remodel
Building Type:
Single family dwe...
E25-10080 this project is a voluntary seismic retrofit. the work includes bolting the mud sill to the foundation and adding sheer walls and hold downs where applicable and adding framing clips to the top plate-rim joist connection. all work to be done from inside of home. all plans are engineer designed and stamped
Valuation:
N/A
Permit #:
BSF2025-39619
Status:
final
Fee:
$325
Permit Type:
N/A
Building Type:
N/A
Type: building single family class: alteration to structure or system zivkovic voluntary seismic retrofit: this project is a voluntary seismic retrofit. the project includes bolting the sill plate to the foundation adding hold downs adding sheer wall and adding framing clips to the top plate - rim joist connection
Valuation:
N/A
Permit #:
BSF25-00351
Status:
final
Fee:
$564
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit of foundation at single family dwelling
Valuation:
$18,330
Permit #:
BLDRA24-0388
Status:
final
Fee:
$869
Permit Type:
Remodel
Building Type:
Single family dwe...
This project is a voluntary seismic retrofit using the standard earthquake home retrofit prescribed plan set. the project includes using urfps & a35s in the crawl space to secure the sill plate to foundation and sill plate to rim joist. in the attached garage simpson titan bolts with bearing plates will be used to bolt the house to the foundation. house is single story. does not inclu... see more
Valuation:
N/A
Permit #:
24 111461 BU
Status:
final
Fee:
$470
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit at single family dwelling
Valuation:
$4,725
Permit #:
BLDRA23-0299
Status:
final
Fee:
$291
Permit Type:
Remodel
Building Type:
Single family dwe...
This project is a voluntary seismic retrofit. the work includes but is not limited to bolting the sill plate to the foundation adding sheer wall and hold downs and installing framing clips to secure the top plate/rim joist connection. does not include plumbing mechanical or electrical
Valuation:
N/A
Permit #:
23 100018 BU
Status:
final
Fee:
$523
Permit Type:
N/A
Building Type:
N/A
This project is a voluntary seismic retrofit. the work includes but is not limited to bolting the sill plate to the foundation adding hold downs adding sheer wall and adding framing clips to the top plate/rim joist connection
Valuation:
N/A
Permit #:
23 108184 BU
Status:
final
Fee:
$492
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit includes filling the hollow cmu blocks on the nw corner of the home with concrete. will bolt the sill plate to the foundation in this area
Valuation:
N/A
Permit #:
23119852RBP
Status:
final
Fee:
$451
Permit Type:
N/A
Building Type:
N/A
Project is a voluntary seismic retrofit. the project includes but is not limited to bolting the sill plate to the foundation and adding building clips to the sill plate - rim joist connection. all work will be done from inside crawl space and basement of home
Valuation:
N/A
Permit #:
23116971RBP
Status:
final
Fee:
$481
Permit Type:
N/A
Building Type:
N/A
Dolson residence - this project is a voluntary seismic retrofit. the project includes but is not limited to bolting the sill plate to the foundation with anchor bo hold downs reinforcing cripple walls with shear walls and adding building clips to strengthen the sill plate-top
Valuation:
$6,350
Permit #:
SFRC-030711-2022
Status:
issued
Fee:
$320
Permit Type:
Repair
Building Type:
N/A
This project is a voluntary seismic retrofit. the project includes but is not limited to bolting the sill plate to the foundation and adding framing clips to the sill plate-rim joist connection. all work will be done from inside the basement/crawl space of the house. all plans are engineer designed and stamped
Valuation:
$5,500
Permit #:
BLDRA22-0953
Status:
final
Fee:
$274
Permit Type:
Remodel
Building Type:
Single family dwe...
This project is a voluntary seismic retrofit. the project includes but is not limited to bolting the sill plate to the foundation and adding building clips to the sill plate-rim joist connection. does not include mechanical electrical or plumbing
Valuation:
N/A
Permit #:
24 102144 BU
Status:
final
Fee:
$385
Permit Type:
N/A
Building Type:
N/A
E22-54195 voluntary seismic retrofit: bolting the sill plate to the foundation adding sheer wall to cripple walls and adding framing clips to the top plate-rim joist connection (all work will be done from inside the basement of the building)
Valuation:
N/A
Permit #:
BLD-22-2381
Status:
complete
Fee:
$332
Permit Type:
N/A
Building Type:
N/A
This is voluntary seismic retrofit the project includes but is not limited to bolting of the sill plate to the foundation using urfps and anchor bolts and installing framing clips to the sill plate and rim joist connection. all work will be done from inside of crawl space and garage
Valuation:
N/A
Permit #:
21 121625 BU
Status:
final
Fee:
$449
Permit Type:
N/A
Building Type:
N/A
Type: building single family class: alteration to structure or system, , dicks residence: this project is a voluntary seismic retrofit. the project includes but is not limited to bolting the sill plate to the foundation via foundation plates and bolts. all work will be done from inside the crawl space
Valuation:
N/A
Permit #:
BSF21-05834
Status:
final
Fee:
$328
Permit Type:
N/A
Building Type:
N/A
This project is a voluntary seismic retrofit. the work includes but is not limited to attaching the home to the foundation using anchor bolts and plates adding sheer wall and using framing clips to tie the top plate to rim joist
Valuation:
N/A
Permit #:
21 116495 BU
Status:
final
Fee:
$441
Permit Type:
N/A
Building Type:
N/A
This project is a voluntary seismic upgrade. the project has engineer stamped plans the work includes but is not limited to bolting the sill plate to the foundation and securing the sill plate to adjoining rim joist. all of the work will be done from inside the basement of the home
Valuation:
$7,211
Permit #:
BLDRA21-0135
Status:
final
Fee:
$346
Permit Type:
Remodel
Building Type:
Single family dwe...
This project is a voluntary seismic retrofit. the project includes but is not limited to bolting the rim joist to the foundation as no sill plate exists
Valuation:
$5,100
Permit #:
BLDRA23-0439
Status:
final
Fee:
$291
Permit Type:
Remodel
Building Type:
Single family dwe...
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BZ Score
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Stronghome Seismic Inc License info
Verified License
| License # | STRONSI813KH |
| Status | Active |
| City | Tukwila |
| Type | Construction Contractor, General |
| Class | Corporation |
| Business Type | Corporation |
- BuildZoom verified this license was active as of March 2026.
Verify this license's status for Stronghome Seismic Inc at the The City of Tukwila, WA.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | STRONSI813KH |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, Construction Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Stronghome Seismic Inc at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
107
BuildZoom Score
Insured
| Insurer | Ohio Security Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Western Surety Co |
| Bond Value | $12,000 |
57
Permits
- Building permit records show that Stronghome Seismic Inc has worked on 57 permitted projects.
Stronghome Seismic Inc Employees
ER
Ewing, James Raymond
Owner
JE
James Ewing
President