Grumco

Grumco appears as active in the Washington State Department of Labor & Industries records we downloaded on November 6, 2026, under construction contractor number GRUMC**970DP, expiring March 27, 2027. A $15,000 bond is on record. Insurance of $1,000,000 is on record. Confirm the current status with the state before you sign, because records change daily.

Official Record

License number

GRUMC**970DP

Type

Construction Contractor

Status

Active (when downloaded)

Effective

March 17, 2003 (about 23 years)

Expires

March 27, 2027

Business type

Limited Liability Company

Specialties

Window Coverings

Bond

$15,000, American Contractors Indem CO

Liability insurance

$1,000,000, Western National Mutual Ins Co, through August 12, 2027

Source

Washington State Department of Labor & Industries, downloaded November 6, 2026

Contact

Trades

Windows, Siding & Insulation

Location

Federal Way, WA 98003

Phone

(206) 575-7944

Map of Federal Way

Map © OpenStreetMap contributors. Shows the city, not the business address.

Before You Hire

Typical lead time is several weeks, due to custom order lead times. Ask:

• What is your license number, and which state or city issued it?
• Can you send a current certificate of liability insurance and proof of workers’ compensation?
• Will the contract list the scope, materials, price, start and finish dates and payment schedule?
• Who pulls the permits, and are they included in the price?
• Who will run the job day to day, and will you use subcontractors?

All 8 questions to ask →

Washington Rules

Washington requires contractors to register with the state. Threshold: Based on activity; no project-dollar floor. Read the Washington license summary.

• Be wary of limited-time discounts that require signing today.
• Federal cooling-off rules may cover some in-home sales; ask for the cancellation form.