Licensed septic contractors in Seattle, WA
2 septic contractors hold an active licence on the Washington State Department of Labor & Industries (L&I) register in Seattle, checked 4 Nov 2026: 0 licensed 10 years or more, 100% bonded and 1 with a complaint or board disclosure on record. Ranked by a published formula; nobody pays to move up.
- Active licences
- 2
- Median time licensed
- 6.3 yrs
- Bonded
- 100%
- Lead-Safe certified
- 0
- Google reviews
- 44
Filled tags sit at the business's Google location; hollow tags show its mailing ZIP code only. Each tag is the theoPros score.
Ranked list
- 1
Emerald City Sewer
- Licence active
- Bonded $15,000
- No complaints
- 2
Jafco Company LLC
- Licence active
- Bonded $6,000
- 1 complaint on record
1 open lawsuit against the bond on the Washington L&I record
Questions people ask about septic contractors in Seattle
How many licensed septic contractors are in Seattle?
2 septic contractors hold an active Washington State Department of Labor & Industries (L&I) licence with a mailing address in Seattle, checked on 4 November 2026. 0 of them have been licensed for 10 years or more.
Does a septic contractor need a licence in Washington?
Yes, when the whole job, labour and materials, costs $500 or more, is part of a bigger project, or they advertise as a contractor (RCW 18.27.090). Electrical and plumbing contractors need an L&I licence for any job, whatever its size (RCW 19.28.041, RCW 18.106.020). Look for an active CCSU licence.
How do I check a septic contractor's licence in Seattle?
Ask for the licence number and look it up on the Washington L&I website, or search this page. Every septic contractor listed here was matched to an active licence on the Washington L&I register.
Which septic contractors rank highest in Seattle?
By our published formula (years licensed, complaint record, bond and insurance, and Google reviews), the top three are Emerald City Sewer (62), Jafco Company LLC (44). Paying or claiming a listing never changes the order.
How much do septic contractors charge in Seattle?
Septic contractors in the Seattle-Tacoma-Bellevue metro earn a median $45.78 an hour (BLS, May 2025); contractors typically bill about twice the wage to cover insurance, overhead and profit.
Do I need a lead-safe certified septic contractor in Seattle?
If your home was built before 1978 and the work disturbs paint, yes: the law requires a firm certified lead-safe by the Washington State Department of Commerce. 50% of homes here were built before 1980 (US Census, ACS 2024 1-year), and 0 of the 2 licensed septic contractors listed are certified.