Updated: Jul 13, 2026
Location and Projects
Address
PO BOX 550, Poway, CA, 92074
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Tsi Seismic Tenant Space Construction
Serving the Poway area and surrounding communities, Tsi Seismic Tenant Space Inc specializes in seismic retrofitting and tenant improvement projects. With 35 years of experience, the firm handles commercial and industrial properties, providing solutions that enhance building safety and functionality. Tsi Seismic Tenant Space Inc focuses on projects that require specialized seismic strengthening, including structural upgrades and modifications to accommodate new tenants or business needs. The company is equipped to address complex engineering requirements often found in seismic compliance work, working closely with property owners and stakeholders to ensure each project meets local building codes and safety standards. Their longstanding presence in Southern California reflects experience across a range of commercial retrofit and improvement jobs.
Tsi Seismic Tenant Space Inc Services
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Tsi Seismic Tenant Space Inc Contact Information
Phone Number: (858) 566-1629
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Address: PO BOX 550, Poway, CA 92074
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Tsi Seismic Tenant Space Inc Poway
Quality
100
87th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Tsi Seismic Tenant Space Inc has a BuildZoom score of 100, which places them above 87% of 336,931 contractors in California.
Activity
|
3 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Tsi Seismic Tenant Space Inc has worked on at least
4.0 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
|
1 project
|
$50k-$100k |
|
2 projects
|
$100k-$250k |
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 Tsi Seismic Tenant Space Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Cross street: robledo real rd foundation: slab description of work: fico minor grading for pds2024-resacc-000164 (3200 sqft detached storage building for existing sfd)
Valuation:
$124,992
Permit #:
PDS2024-RESGRD-000026
Status:
complete
Fee:
$2,545
Permit Type:
N/A
Building Type:
N/A
Master bedroom entry garage addition. garage conversion to living space
Valuation:
$189,000
Permit #:
BLDR-028219-2023
Status:
issued
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
New residential detached accessory structure - plan check-permit
2024-07-09
Cross street: robledo real rd foundation: slab description of work: 3200 sqft detached storage building for existing single family dwelling
Valuation:
$124,992
Permit #:
PDS2024-RESACC-000164
Status:
complete
Fee:
$7,502
Permit Type:
N/A
Building Type:
N/A
Mobile home parksite construction - plan check-permit
2023-12-23
Park name: skyline ranch country club rd park i.d. no.37- 0682 community: valley center description: *fico* 40 sqft bathroom addition 960 sqft det patio cover for existing community center in mh park note to permittee: once this permit is issued it will be valid for six months. work must commence and a valid inspection performed within six months of issuance. no extension shall be gra... see more
Valuation:
N/A
Permit #:
PDS2023-MHPARK-000084
Status:
complete
Fee:
$948
Permit Type:
N/A
Building Type:
N/A
Uptown: building and plumbing permit to an existing apartment complex to addition a unisex ada restroom on second floor where the (e) storage room is located. base zone rm-3-9. discretionary #10274. transit priority area. geo haz 52
Valuation:
$11,266
Permit #:
2500376
Status:
complete
Fee:
$2,260
Permit Type:
Add/alt tenant im...
Building Type:
N/A
Mira mesa: combination permit for proposed addition and remodel at an existing single family residence. scope to include: addition to master bedroom remodel kitchen and master bathroom. rs-1-14 tpa geo haz 51
Valuation:
$25,800
Permit #:
2474448
Status:
complete
Fee:
$1,436
Permit Type:
Add/alt 1 or 2 fa...
Building Type:
N/A
New residential detached accessory structure - plan check-permit
2024-10-12
Cross street: canal rd foundation: slab description of work: 1000 sqft det metal storage w 1000 sqft attach covered storage for existing single family dwelling 10/13/21: plan change. see c of a for details. tv
Valuation:
$92,030
Permit #:
PDS2021-RESACC-001128
Status:
complete
Fee:
$2,896
Permit Type:
N/A
Building Type:
N/A
Unit 71: fire damage repairs to 400 sf interior living new fau 4 sq reroof comparable shingle retrofit windows like for like
Valuation:
$19,307
Permit #:
CBR2020-3191
Status:
final
Fee:
N/A
Permit Type:
Repair
Building Type:
N/A
Const chg to 630969 approval #2261122. delta 2=revised luminaire schedule update electrical loads title 24 electrical lighting plan/notes
Valuation:
N/A
Permit #:
2296880
Status:
issued
Fee:
$419
Permit Type:
N/A
Building Type:
N/A
Extend gas line to accomodate 2 new gas dryers
Valuation:
$10,000
Permit #:
BLDG22-1978
Status:
final
Fee:
$769
Permit Type:
Simple
Building Type:
N/A
Kearny mesa. building mechanical electrical plumbing permits for tenant improvement to convert warehouse to showroom at existing commercial building
Valuation:
N/A
Permit #:
PRJ-1044880
Status:
complete
Fee:
$3,431
Permit Type:
N/A
Building Type:
N/A
Washer/dryer installation unit (sparrow)
Valuation:
N/A
Permit #:
B19-2198
Status:
issued
Fee:
N/A
Permit Type:
Elec/mech/plumbing
Building Type:
N/A
Washer/dryer installation unit (sparrow)
Valuation:
N/A
Permit #:
B19-2197
Status:
issued
Fee:
N/A
Permit Type:
Elec/mech/plumbing
Building Type:
N/A
Tsi seismic tenant
Valuation:
N/A
Permit #:
B19-2065
Status:
final
Fee:
N/A
Permit Type:
Elec/mech/plumbing
Building Type:
N/A
Plumbing pmt:7915/balboa
Valuation:
N/A
Permit #:
PMT-3130499
Status:
complete
Fee:
$223
Permit Type:
N/A
Building Type:
N/A
Electrical pmt:7915/balboa
Valuation:
N/A
Permit #:
PMT-3130498
Status:
complete
Fee:
$678
Permit Type:
N/A
Building Type:
N/A
Mechanical pmt:7915/balboa
Valuation:
N/A
Permit #:
PMT-3130497
Status:
complete
Fee:
$652
Permit Type:
N/A
Building Type:
N/A
Residential alteration or addition - plan check-permit
2017-05-10
Cross street: hunter st description of work: 486 sf single family dwelling addition 235 sf attached patio cover w electrical 48 sf covered entry 216 lf interior partitions remodel to include reconfiguring kitchen new laundry/bathrm/closets/window replacements & (1) interior prefab fireplace and relocating main service (misc elec) for (e) single family dwelling 3-2-18: permit renewed a... see more
Valuation:
$98,660
Permit #:
PDS2017-RESALT-002431
Status:
complete
Fee:
$4,247
Permit Type:
N/A
Building Type:
N/A
Uptown. building electrical and mechanical permits for remodel to extg five story apartment complex. work to include convert portion of balconies in each unit into washer/dryer rooms modify electrical room modify extg washer/dryer room and mep to support. rm-3-9. unknown discretionary. transit priority area. geo haz 52
Valuation:
$125,000
Permit #:
2328549
Status:
approved
Fee:
$19,954
Permit Type:
Add/alt tenant im...
Building Type:
N/A
Kearny mesa: building & electrical permits for the fire damage repair of an existing 1-story + mezzaanine commercial building. work to include interior demolition of existing non-load bearing partitions; new demising walls; partial removal of existing exterior wall; relocate main entrance. no mechanical or plumbing work. base zone: il-3-1; transit priority area; geo haz 52; montgomery... see more
Valuation:
$134,418
Permit #:
2258080
Status:
issued
Fee:
$2,168
Permit Type:
Add/alt tenant im...
Building Type:
N/A
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Tsi Seismic Tenant Space Inc License info
Verified License
| License # | 465538 |
| Status | Active |
| State | California |
| Type | General Building, Drywall |
| Business Type | Corporation |
- BuildZoom verified this license was active as of July 2026.
Verify this license's status for Tsi Seismic Tenant Space Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 465538 |
| Status | Active |
| City | Oceanside |
| Type | Contractor |
| Business Type | Corporation |
- BuildZoom verified this license was active as of June 2026.
Verify this license's status for Tsi Seismic Tenant Space Inc at the City of Oceanside, CA.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-F163504-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Tsi Seismic Tenant Space Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-F163504-1 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Tsi Seismic Tenant Space Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | NAT-57371-2 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Corporation |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Tsi Seismic Tenant Space Inc at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
100
BuildZoom Score
Bonded
| Bonded Agent | American Contractors Indemnity Company |
| Bond Value | $15,000 |
Insured
| Workers Comp Provider | Workers' Compensation History |
71
Permits
- Building permit records show that Tsi Seismic Tenant Space Inc has worked on 71 permitted projects.
Tsi Seismic Tenant Space Inc Employees
DH
Darren Earl Hardesty
Officer
EH
Earl Miles Hardesty
Rmo / Ceo / Pres
JD
James Dwight Dollar
Officer
RH
Richard C Humble
Rmo / Ceo / Pres