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CONCRETE x SEATTLE x WASHINGTON

Concrete contractors in Seattle, Washington.

Concrete contractors operating in Seattle must navigate both state-level registration and city-specific permitting processes. The Washington State Department of Labor & Industries (L&I) serves as the primary regulatory body for contractor registration, bonding, and insurance compliance. Failure to maintain these state credentials will result in an immediate inability to legally perform work in the city.

At the local level, the Seattle Department of Construction & Inspections (SDCI) and the Seattle Department of Transportation (SDOT) oversee the physical execution of projects. Contractors must ensure that any work affecting public infrastructure, such as sidewalks or curb cuts, is permitted through SDOT, while structural concrete work on private property requires an SDCI building permit. Adherence to these regulations is critical to avoiding stop-work orders and project delays.

State License
STATE WA L&IRegistration
Permit Issuer
SDCI / SDOTSeattle
Avg. Plan Review
2-6 WeeksVaries by scope
Typical Start-Up
RANGE $500-$1,500Fees & Bonds
FILE · CONCRETE x SEATTLE x WASHINGTON
Compliance Dossier
Public
File
05 / 2026
State AuthorityWA Dept of Labor & Industries
CountyKing County
City AuthoritySeattle SDCI
Statute / CodeRCW 18.27 / Seattle Building Code
Federal Cert.OSHA
ReciprocityVerify with L&I
Track these for me→Download leaf as PDF↓
FILE CONCRETELOCATION SEATTLE, WASHINGTONTYPE COMPLIANCE GUIDE
VERIFIED 05 / 2026STATUS PUBLIC REFERENCE
What's specific to SeattleWhat this leaf carries beyond the Washington state file.
SDOT Street Use
Concrete work in Seattle frequently touches public right-of-way, requiring specific SDOT street-use permits distinct from building permits.
Environmental Compliance
Seattle has strict stormwater runoff regulations; concrete washout must be contained and managed to prevent pollutants from entering the storm drain system.
Seismic Standards
Concrete foundations and structural elements must comply with Seattle's specific seismic design requirements due to the region's high earthquake risk.
§ 01 · Permit Stack

Three layers govern Concrete work in Seattle.

State registration is the foundation; local permits are project-specific requirements.

State — Floor
WA L&I
Contractor RegistrationSurety Bond
County — Overlay
King County
Environmental HealthStormwater
City — Where you file
Seattle SDCI/SDOT
Building PermitStreet Use Permit

Read it bottom-up.

State registration is the foundation; local permits are project-specific requirements.

This file exists to show what changes when the trade is Concrete and the jurisdiction is Seattle, Washington.

Source · State, county, and city issuing authoritiesLast verified · 05 / 2026
§ 02 · Specs Ledger

Every requirement, with a number on it.

Each row names the issuing authority, cost, timeline, citation, and status behind the requirement.

RequirementIssued byCostTimeCitationStatus
Contractor RegistrationMust be active
WA L&I
$120
1-2 weeks
RCW 18.27
REQUIRED
Surety BondGeneral Contractor
Bonding Agency
Verify with agency
Immediate
RCW 18.27.040
REQUIRED
General LiabilityMin $250k/$50k
Insurance Carrier
Verify with agency
Immediate
RCW 18.27.050
REQUIRED
Building PermitFor structural work
SDCI
Verify with agency
2-6 weeks
Seattle Building Code
REQUIRED
Street Use PermitFor sidewalk/curb
SDOT
Verify with agency
2-4 weeks
Seattle Municipal Code
REQUIRED
OSHA 10Recommended
OSHA
Verify with agency
10 hours
Federal Law
REQUIRED
§ 03 · Year-One Cost

What it costs to start Concrete in Seattle.

A practical floor for Seattle, Washington. Verify each amount with the issuing authority.

Year-one ledger
Seattle, Washington · Concrete
State Registration FeeBiennial$120
Surety Bond PremiumAnnualVerify with agency
General Liability InsuranceAnnualVerify with agency
Building Permit FeePer projectVerify with agency
Street Use Permit FeePer projectVerify with agency
Inspection FeesPer visitVerify with agency
Year-one floorVaries by project
Excludes tools, vehicle purchase, payroll, and marketing.
Note
Bonding Costs

Bond premiums depend on credit score and company history.

Note
Permit Fees

Fees are calculated based on the total valuation of the construction project.

Note
Insurance

Rates vary based on company size and previous claims history.

§ 04 · Path to First Job

From day zero to first inspection.

A practical path for Concrete contractors in Seattle.

1
Day 0
Business Registration
WA L&I
2
Day 14
Bond & Insurance Procurement
Private
3
Day 30
Permit Application Submission
SDCI
4
Day 60
Plan Review & Approval
SDCI
5
Day 65
Project Commencement
N/A
6
Day 90
Final Inspection & Closeout
SDCI
§ 05 · Compliance Checklist

Check them off.

Each item names the issuing authority, cycle, and citation.

01
Verify L&I Status
Ensure registration is active and not suspended.
L&IComplianceWA L&I
ContractorIssuing authority
02
Site Safety Plan
Develop a site-specific safety plan for concrete pouring.
SafetyOSHAOSHA
ContractorIssuing authority
03
Stormwater Protection
Install silt fences and washout containment.
EnvironmentSeattleSeattle Stormwater Code
ContractorIssuing authority
04
Permit Posting
Display the building permit prominently at the job site.
PermitSDCISeattle Building Code
ContractorIssuing authority
05
Inspection Scheduling
Request inspections at required project milestones.
InspectionSDCISeattle Services Portal
ContractorIssuing authority
06
Final Sign-off
Obtain final approval from the inspector.
CloseoutSDCISeattle Building Code
InspectorIssuing authority
§ 06 · Local Enforcement Data

Violations cited most in Seattle.

When confirmed local data is unavailable, this section stays marked for verification.

Commonly cited
Verify with agency—

Unpermitted Work

Performing structural concrete work without an active building permit.

PenaltyStop-work order and fines
Commonly cited
Verify with agency—

Improper Washout

Allowing concrete washout to enter the city storm drain system.

PenaltyEnvironmental fines
Commonly cited
Verify with agency—

Lapsed Registration

Working with an expired state contractor registration.

PenaltyCivil penalties and license suspension
§ 07 · Seattle-specific FAQ

Questions Concrete contractors ask about Seattle.

Q01Do I need a city license to pour concrete in Seattle?+
No, Seattle does not issue a separate contractor license; however, you must be registered with the Washington State Department of Labor & Industries.
LicensingSeattleSource · WA L&I Contractor Registration
Q02When is a permit required for a concrete driveway?+
A permit is required if the work involves structural changes or impacts the public right-of-way, such as a curb cut or sidewalk modification.
PermitsDrivewaySource · SDOT Street Use Manual
Q03What is the minimum bond amount for a specialty contractor?+
Specialty contractors in Washington are required to maintain a $6,000 surety bond.
BondingFinancialSource · RCW 18.27.040
Q04How do I schedule an inspection for my concrete project?+
Inspections can be scheduled through the Seattle Services Portal on the SDCI website using your permit number.
InspectionSDCISource · Seattle Services Portal
Q05Are there specific concrete mix requirements in Seattle?+
Yes, concrete must meet specific compressive strength and environmental standards as outlined in the Seattle Building Code.
StandardsBuilding CodeSource · Seattle Building Code
Q06Is workers' compensation insurance mandatory?+
Yes, if you have employees, you must provide workers' compensation coverage through the Washington State Department of Labor & Industries.
InsuranceEmployeesSource · WA L&I Employer Requirements
§ 08 · Related

Adjacent files.

Other trades — Seattle

Seattle Electrical Permits→

Regulatory Resources

WA L&I Contractor Search→

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