Development Engineering

The Development Engineering (DE) department of Lakehaven Water and Sewer District manages several areas including Certificates of Availability, new water & sewer service connections, new development projects, & information regarding existing water & sewer system facilities. Below are links to current fees & charges, as well as our department's FAQs by PDF. Click on the links to the left for more specific information and documents & forms (Check for 2023 updates).

 Fees, charges & deposits schedules

  1. Development Engineering

    Physical Address
    Water Operations Building B
    31627B 1st Avenue S
    Federal Way, WA 98003

    Mailing Address
    P.O. Box 4249
    Federal Way, WA 98063

  1. The dropbox is located South of the Lakehaven entrance sign.


    Customer ServiceDevelopment Engineering
    Office Hours:8AM to 4 PM  8AM to 3:30 PM EXCEPT Thursday: 8AM to 2PM
    Location:Headquarters Building A (Customer Service (on the right inside)Headquarters Building A - Development Engineering (on the left inside)
    (Federal Way)31627A 1st Ave S31627S 1st Ave
    Beginning July 15, 2022 Customer Service and Billing staff will be in a staff meeting the 3rd Friday of each month from 7:30 AM to 8:30 AM. On the third Friday of the month the office hours and phone hours will be 8:30 AM to 4:00 PM (instead of 8 AM to 4 PM).
    Call 253-941-1516 to report a water or sewer emergencies after hours (weekday evenings and weekends).

    Contact Us to find other resources:

    • Other Departments and Staff 
    • Business closures
    • Lakehaven Building Addresses
Call 811 Before You Dig