Updated: May 11, 2026
Location and Projects
Address
1305 MANSFIELD STE 1, Richland, WA, 99352
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Siefken & Sons Const Plumber
Siefken & Sons Const Inc, 1305 Mansfield, Richland, WA (Employees: Bill Siefken, Jeffrey Siefken, and Reta Siefken) holds a Construction Contractor, General license and 2 other licenses according to the Tukwila license board.
Their BuildZoom score of 103 ranks in the top 10% of 128,670 Washington licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Siefken & Sons Const Inc, we recommend double-checking their license status with the license board and using our bidding system to get competitive quotes.
Siefken & Sons Const Inc Services
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Siefken & Sons Const Inc Contact Information
Phone Number: (509) 946-6500
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Address: 1305 MANSFIELD STE 1, Richland, WA 99352
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Siefken & Sons Const Inc Richland
Quality
103
90th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Siefken & Sons Const Inc has a BuildZoom score of 103, which places them above 90% of 128,670 contractors in Washington.
Activity
|
4 projects
|
2025 |
|
2 projects
|
2024 |
|
1 project
|
2023 |
Our building permit records indicate that Siefken & Sons Const Inc has worked on at least
7.0 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
|
$20k-$50k |
|
2 projects
|
$50k-$100k |
|
1 project
|
$500k-$1mil |
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 Siefken & Sons Const Inc
This is a sample of this contractor's permits. Click here to access their complete permit history.
Renovation and expansion of existing golf universe building
Valuation:
$750,000
Permit #:
PLBC-2023-3403
Status:
expired
Fee:
$210
Permit Type:
N/A
Building Type:
N/A
Renovation and expansion of existing golf universe building
Valuation:
$750,000
Permit #:
MECC-2023-3402
Status:
expired
Fee:
$1,152
Permit Type:
N/A
Building Type:
N/A
Construct utilities for pnwcc improvements - new tenant at previous golf universe building per approved construction drawings signed by john cowling on 7/23/2024
Valuation:
N/A
Permit #:
DPW-2024-2536
Status:
expired
Fee:
$6,682
Permit Type:
N/A
Building Type:
N/A
Public restroom building to service the neighboring baseball fields. all owned by the city of kennewick
Valuation:
$24,773
Permit #:
BLDC-2025-1843
Status:
issued
Fee:
$5,517
Permit Type:
N/A
Building Type:
N/A
Public restroom building to service the neighboring baseball fields. all owned by the city of kennewick
Valuation:
$24,773
Permit #:
BLDC-2025-1843
Status:
issued
Fee:
$5,517
Permit Type:
N/A
Building Type:
N/A
Building tenant improvement and expansion
Valuation:
$750,000
Permit #:
BLDC-2023-3371
Status:
expired
Fee:
$7,320
Permit Type:
N/A
Building Type:
N/A
1 domestic water meter for pacific northwest community college improvements - new tenant at previous golf universe building
Valuation:
N/A
Permit #:
DPW-2024-2537
Status:
expired
Fee:
$850
Permit Type:
N/A
Building Type:
N/A
Installing new public restroom
Valuation:
$25,950
Permit #:
PLBC-2025-1851
Status:
issued
Fee:
$275
Permit Type:
N/A
Building Type:
N/A
Installing new public restroom
Valuation:
$25,950
Permit #:
PLBC-2025-1851
Status:
issued
Fee:
$275
Permit Type:
N/A
Building Type:
N/A
Interior tenant improvement - franklin county pud #1
Valuation:
N/A
Permit #:
B24-2506
Status:
final
Fee:
N/A
Permit Type:
Major alter/repair
Building Type:
N/A
Interior t/i-(chiawana high) psd
Valuation:
$25,056
Permit #:
B21-2685
Status:
final
Fee:
$688
Permit Type:
Major alter/repair
Building Type:
N/A
Amberbrook townhomes #d: residing building d
Valuation:
N/A
Permit #:
BLD-2021-01034
Status:
issued
Fee:
$760
Permit Type:
N/A
Building Type:
N/A
Amberbrook townhomes #b: residing building b
Valuation:
N/A
Permit #:
BLD-2021-01033
Status:
issued
Fee:
$760
Permit Type:
N/A
Building Type:
N/A
Amberbrook townhomes #a: residing building a
Valuation:
N/A
Permit #:
BLD-2021-01032
Status:
issued
Fee:
$760
Permit Type:
N/A
Building Type:
N/A
Siding windows & doors replacement
Valuation:
$240,000
Permit #:
B21-0164
Status:
final
Fee:
$2,958
Permit Type:
Major alter/repair
Building Type:
N/A
New exterior freezer/(ochoa ms)psd
Valuation:
$27,026
Permit #:
B20-1378
Status:
final
Fee:
$721
Permit Type:
Major alter/repair
Building Type:
N/A
Interior t/i(pasco school dist)
Valuation:
$75,941
Permit #:
B23-2925
Status:
final
Fee:
$1,387
Permit Type:
Major alter/repair
Building Type:
N/A
New building/tri city union gospel mission
Valuation:
N/A
Permit #:
B16-1386
Status:
final
Fee:
N/A
Permit Type:
Major alter/repair
Building Type:
N/A
St. joseph's daycare: children's bathroom addition w/in existing school classroom bld-2021-03368 mec-2021-03369 & plumbing-2021-03382
Valuation:
$74,000
Permit #:
BLD-2021-03368
Status:
complete
Fee:
$1,365
Permit Type:
N/A
Building Type:
N/A
Removal of old siding and putting on new hardy board lap siding. amberbrook townhomes - building d
Valuation:
$50,000
Permit #:
BLDC-2023-0473
Status:
complete
Fee:
$669
Permit Type:
N/A
Building Type:
N/A
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Siefken & Sons Const Inc Reviews
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Verified License
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Siefken & Sons Const Inc License info
Verified License
| License # | SIEFKSC198MZ |
| 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 Siefken & Sons Const 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 # | SIEFKSC198MZ |
| 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 Siefken & Sons Const Inc at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
Inactive License
| License # | 3372 |
| Status | Inactive |
| City | Pasco |
| Type | Contr General |
| Business Type | Corporation |
- According to the The City of PASCO, WA, 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 Siefken & Sons Const Inc at the The City of PASCO, WA.
This is a sample of licensing data; click here to access a complete history.
103
BuildZoom Score
Insured
| Insurer | Ohio Security Ins Co |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | Travelers Cas & Surety Co |
| Bond Value | $12,000 |
51
Permits
- Building permit records show that Siefken & Sons Const Inc has worked on 51 permitted projects.
Siefken & Sons Const Inc Employees
BS
Bill Siefken
President
JS
Jeffrey Siefken
Vice President
RS
Reta Siefken
Secretary
RS
Richard Siefken
President
SR
Siefken, Bill R
SG
Siefken, Jeffrey G
SL
Siefken, Richard L