Updated: Feb 04, 2026
Location and Projects
Address
6480 Hillside Dr, El Sobrante, CA, 94803
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Calseismic Construction Inc
Calseismic Construction Inc, 6480 Hillside Dr, El Sobrante, CA holds a General Building license according to the California license board.
Their BuildZoom score of 103 ranks in the top 10% of 336,931 California licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Calseismic Construction Inc, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Calseismic Construction Inc Services
Start a project today:
Custom Home Build
New Home Construction
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Other Residential Remodel
Hardwood Flooring
Carpets
Laminate Flooring
Other Flooring
Framing
Wood Fences
Drywall
Interior Plaster
Brick and Blockwork
Other Masonry
Flatwork Concrete
Foundations
Other Concrete
Seismic Retrofit
Gutters and Flashing
Pole Barn
ADU
Small Multi-Family New Cons...
Small Multi-Family Remodel ...
Whole Home Remodel
Modular Home Construction
Pool House
Other Secondary Structure N...
Addition
Vertical Addition
Horizontal Addition
Vertical and Horizontal Add...
Calseismic Construction Inc Contact Information
Phone Number: (510) 621-4524
Address: 6480 Hillside Dr, El Sobrante, CA 94803
Calseismic Construction Inc El Sobrante
Quality
103
90th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Calseismic Construction Inc has a BuildZoom score of 103, which places them above 90% of 336,931 contractors in California.
Activity
|
9 projects
|
2025 |
|
3 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Calseismic Construction Inc has worked on at least
13.0 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
|
11 projects
|
$5k-$20k |
The typical size of their permits is approximately $8,396. 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 Calseismic Construction Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
The house was built in 1949 there is currently no existing bolts under the original house. the original house is 28'x34. there is a small 12'x24 addition attached to the original house. there is no access to the crawlspace of the addition. tthe total square footage of the house is 1240sqft the seismic retrofit will take place in the 952sqft. crawlspace under the original house the hou... see more
Valuation:
N/A
Permit #:
BISUB23-02978
Status:
applied
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
The house was built in 1949 there is currently no existing bolts under the original house. the original house is 28'x34. there is a small 12'x24 addition attached to the original house. there is no access to the crawlspace of the addition. tthe total square footage of the house is 1240sqft the seismic retrofit will take place in the 952sqft. crawlspace under the original house the hou... see more
Valuation:
$6,194
Permit #:
BIAL23-011259
Status:
approved
Fee:
$334
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit in accordance with standard plan set a in the crawlspace area of the perimeter foundation. bracing and bolting only linear feet
Valuation:
$8,326
Permit #:
2025 125744 RS
Status:
issued
Fee:
N/A
Permit Type:
Single-family
Building Type:
N/A
Standard plan a voluntary seismic retrofit
Valuation:
$8,519
Permit #:
B24-018296
Status:
final
Fee:
$297
Permit Type:
N/A
Building Type:
N/A
Main dwelling alteration: voluntary seismic retrofit in accordance with standard plan a
Valuation:
$8,415
Permit #:
BR25-00611-ALT
Status:
final
Fee:
$818
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit in accordance with standard plan
Valuation:
$9,782
Permit #:
BLD2025-00342
Status:
final
Fee:
$909
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit in accordance with standard plan a
Valuation:
$8,415
Permit #:
S25-00415-RES
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit in accordance with standard plana
Valuation:
N/A
Permit #:
BP25-00530
Status:
final
Fee:
$474
Permit Type:
Foundation only
Building Type:
N/A
Standard plan a voluntary seismic retrofit
Valuation:
$7,601
Permit #:
BP24-0285
Status:
final
Fee:
$774
Permit Type:
Seismic upgrade
Building Type:
N/A
Seismic strengthening in accordance with plan set a: install foundation plates & braces
Valuation:
$6,774
Permit #:
177967
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
Residential
Voluntary seismic retrofit in accordance with standard plan a
Valuation:
$12,565
Permit #:
B25-0526
Status:
final
Fee:
$559
Permit Type:
N/A
Building Type:
Dwellings
Voluntary seismic retrofit in accordance with standard plan a
Valuation:
N/A
Permit #:
PRE25-00749
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Voluntary standard plan a seismic retrofit. voluntary standard plan a seismic retrofit using simpson (20) urfp-10 foundation plates w (2) 4 x 1/2 simpson titen hd bolts per plate. along with (40) simpson l90 braces to connect the mudsill to the floor framing
Valuation:
N/A
Permit #:
B24-03829
Status:
final
Fee:
$563
Permit Type:
Seismic retrofit
Building Type:
N/A
Seismic retrofit per standard plan a
Valuation:
$5,987
Permit #:
B2024-0797
Status:
final
Fee:
$433
Permit Type:
Foundation
Building Type:
N/A
Voluntary seismic retrofit in accordance w plan set a
Valuation:
$8,952
Permit #:
BD25-1333
Status:
issued
Fee:
$1,030
Permit Type:
Seismic brace and...
Building Type:
N/A
Building residential seismic upgrade standard plan set a
Valuation:
$8,396
Permit #:
BL-RPC-2025-00125
Status:
complete
Fee:
$190
Permit Type:
N/A
Building Type:
N/A
Voluntary seismic retrofit in accordance with standard plan a. includes installing foundation plates and braces
Valuation:
$8,396
Permit #:
BL-RES-2025-00186
Status:
canceled
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Calseismic Construction Inc Reviews
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Recent Buildzoom Projects
Verified License
BuildZoom confirmed this contractor's license
Calseismic Construction Inc License info
Verified License
| License # | 1106859 |
| Status | Active |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- BuildZoom verified this license was active as of February 2026.
Verify this license's status for Calseismic Construction Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
103
BuildZoom Score
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $25,000 |
13
Permits
- Building permit records show that Calseismic Construction Inc has worked on 13 permitted projects.