Updated: May 26, 2026
Location and Projects
Address
4631 NE 5TH ST, Renton, WA, 98059
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Retec Construction
Serving the Pacific Northwest for over 16 years, Retec Inc. operates from Renton, WA, and focuses on delivering environmental consulting and remediation solutions for both public and private sector clients. The company specializes in contaminated site investigations, environmental assessments, and hazardous materials management. Retec Inc. manages a range of environmental projects, including soil and groundwater remediation, hazardous waste oversight, and regulatory compliance consulting. Their team addresses challenges on properties such as industrial facilities, commercial developments, and municipal sites. With extensive experience supporting real estate transactions and redevelopment projects, Retec Inc. assists clients in meeting environmental regulations and mitigating environmental risks across the greater Seattle metro area.
Retec Inc Services
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Retec Inc Contact Information
Phone Number: (425) 204-7964
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Address: 4631 NE 5TH ST, Renton, WA 98059
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This is a sample of this contractor's permits. Click here to access their complete permit history.
A single family residential remodel residence project involving (living room kitchen family room)
Valuation:
N/A
Permit #:
24 119156 BT
Status:
final
Fee:
$215
Permit Type:
N/A
Building Type:
N/A
Wire kitchen & bathroom remodel - home owner doing their own work. 3/7/2014 rlm addition 125 amp service/scl safety inspection.6-10-14 ah. permit transfered from owner listed as primary.6/17/14 cpg addition (1) electric heat 1.5 kw. 6-18-14 ah. added (5) baseboards
Valuation:
N/A
Permit #:
6406437-EL
Status:
complete
Fee:
$353
Permit Type:
N/A
Building Type:
Single family/duplex
Interior remodel and deck expansion. does not include clearing and grading plumbing mechanical or electrical. *14-1409433 ea*
Valuation:
N/A
Permit #:
14 125986 BR
Status:
final
Fee:
$783
Permit Type:
N/A
Building Type:
N/A
Clove one exterior door subdivide existing bonus room into a bedroom and a laundry expand existing power room to include shower install 2 solar tubs. includes mechanical electrical and plumbing. **11 114441 ea**
Valuation:
N/A
Permit #:
11 115207 BT
Status:
final
Fee:
$458
Permit Type:
N/A
Building Type:
N/A
Replacing drywall remodeling bathroom and adding drywall in garage. does not include plumbing mechanical or electrical (#10-102633 ie)**add on plumbing and mechanical**
Valuation:
N/A
Permit #:
10 105953 BT
Status:
final
Fee:
$490
Permit Type:
N/A
Building Type:
N/A
Water heater
Valuation:
N/A
Permit #:
13 119231 BN
Status:
final
Fee:
$40
Permit Type:
N/A
Building Type:
N/A
Replace deck guard wall with guard rail
Valuation:
N/A
Permit #:
0908-043
Status:
final
Fee:
$183
Permit Type:
N/A
Building Type:
N/A
Addition a front covered porch and provide 8 parking stalls. change of use
Valuation:
N/A
Permit #:
12 121055 BW
Status:
expired
Fee:
$1,593
Permit Type:
N/A
Building Type:
N/A
Replace gas water heater
Valuation:
N/A
Permit #:
09 132640 BK
Status:
canceled
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
Repair water service from meter to house at single family residence
Valuation:
N/A
Permit #:
P100258
Status:
expired
Fee:
$53
Permit Type:
N/A
Building Type:
N/A
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164
BZ Score
$32.4K
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Projects
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Retec Inc License info
Verified License
| License # | RETECI*926CH |
| 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 Retec 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 # | RETECI*926CH |
| 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 Retec Inc at the Washington State Department of Labor & Industries.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| License # | RETECI 926CH |
| Status | Active |
| State | Washington |
| Type | Construction Contractor, General |
| Business Type | Corporation |
- When BuildZoom last verified this license, it had an expiration date of March, 2018. Check the current license status of Retec Inc with the Washington State Department of Labor & Industries
This is a sample of licensing data; click here to access a complete history.
96
BuildZoom Score
Insured
| Insurer | Contractors Bonding & Insuranc |
| Insured up to | $1,000,000 |
Bonded
| Bonded Agent | CBIC |
| Bond Value | $12,000 |
10
Permits
- Building permit records show that Retec Inc has worked on 10 permitted projects.
Retec Inc Employees
CS
CHANG, WEN SEN
President
WC
Wen Chang
President
WC
Wen Sen, Chang
Governing Persons
WC
WEN-SEN, CHANG
Governing Persons