Lilly’s Septic System Installation and Repair Service
King County Septic System and Drainfield Experts
(425) 432-3084 * (253) 639-3606 * (360) 825-4809
Lilly’s Septic Service Owner Darren McCullough is a Certified Master Installer
for King, Pierce, Snohomish & Kittitas County.
Our licensing includes every and all Septic System types designed for the state of Washington.
We specialize in critical sites and limited space installations! If you have a difficult site, no worries, Lilly’s Septic will provide expert, efficient and satisfaction guaranteed installation of your septic system.
When other companies can’t or won’t, we always come through for our clients! Our master installer and staff have a ‘Whatever It Takes” attitude for all of our clients.
Systems currently approved to be installed in King County
- Whitewater ATU (Aerobic Treatment Unit)
- Avantex system
- ATU to Drip System
- Pressure Distribution System
- Pressure to Gravity
- Mound Systems (Above & Sub Surface)
- Sand Filter Systems
- Fast System
INSTALL COORDINATION:
Our install coordinator takes care of you every step of the way… From your 1st raw land service call, obtaining your system design, bid proposal process, notarization & recording of King or Pierce County documents, permit submission, System inspections & scheduling. When you choose Lilly’s Septic Service as your installer “one call does it all”.
It is our mission to make the installation process as easy and painless as possible for our customers! When quality & courtesy count, count on Lilly’s Septic Service.
Septic System Design – The design of your septic system is important because it not only needs to meet your needs but also adhere to local building codes. Improper design can lead to expensive cost overruns down the road.
Consulting – Need a difficult septic problem solved? Planning a new home or new housing development in an unsewered area? We can help answer all your septic questions.
Septic System Repairs – You can rely on us whenever you need a repair. We repair and maintain all wastewater systems.


Complete clearing, grading & excavating – Lilly’s Septic service offers complete clearing, grading & excavating services to homeowners and contractors. When choosing your excavation contractor for your property it is very important that you choose the right person for the job. Our excavation crew is also our septic system installation crew!
If you choose an excavation company that is not a master installer you are looking for trouble. Your septic system design area should be staked and fenced off prior to any excavation of the property starts! If your system site is disturbed in any way, your design will be void and your property may become unusable. This is a very costly mistake made by many custom construction home owners. Lilly’s Septic Services knows the rules and regulations and will protect your site when excavating for your home and landscaping.
Give us a call today
(425) 432-3084 * (253) 639-3606 * (360) 825-4809
Info@LillySeptic.com
Serving King & Pierce County including: Maple Valley, Ravensdale, Hobart, Enumclaw, Black Diamond, Covington, Issaquah, Sammamish, Kent, Auburn, Renton, Federal Way, SeaTac, Edgewood, Tukwilla, Seattle, Snoqualmie, North Bend, Fall City, Preston, Carnation, Woodinville, Redmond, Duvall, Kirkland, Bellevue, Clyde Hill, Medina, Mercer Island – Greenwater, Buckley, Bonney Lake, Lake Tapps, Puyallup, Tacoma


