Onestop Heating Clng Elec LLC

Onestop Heating Clng Elec LLC appears as active in the Washington State Department of Labor & Industries records we downloaded on November 6, 2026, under construction contractor number ONESTHC762DE, expiring March 5, 2028. A $30,000 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

ONESTHC762DE

Type

Construction Contractor

Status

Active (when downloaded)

Effective

March 5, 2024 (about 2 years)

Expires

March 5, 2028

Business type

Limited Liability Company

Specialties

General

Bond

$30,000, Nationwide Mutual Ins Co

Liability insurance

$1,000,000, Palomar Excess & Surplus Insur, through March 1, 2027

Source

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

Contact

Trades

HVAC Contractors · General Contractors

Location

Mountlake Terrace, WA 98043

Phone

(206) 853-0529

Map of Mountlake Terrace

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

Before You Hire

Typical lead time is same day to a week; longer in peak season. 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 9 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.

• A proper load calculation matters more than matching the old unit’s size.
• Compare the same size and efficiency across quotes.