PERMIT #7130334-CN
8349 20th Ave NW, Seattle, WA
activeAADU in Basement Allow housing for one new stacked dwelling unit within an existing structure. Existing detached dwelling unit to remain. Construct alterations to convert one-family to two-family dwelling at 8349 20th Ave NW, Seattle, WA in Ballard, Seattle. Permit 7130334-CN is active, valued at $150,000. Work is being performed by HARDING FERRARIO CONST LLC.
Permit Timeline & Status
Construction Permit Timeline
Applied
March 9, 2026
In Review
2 cycles
Reviews Done
April 27, 2026
Ready to Issue
April 27, 2026
Issued
April 29, 2026
Completed
—
Expires
October 29, 2027
48
Plan Review Days — Total
37
Plan Review Days — City Control
11
Days in Applicant Control
2
Review Cycles
Permit issued — construction underway.
Plan-review data from Seattle DCI. “City control” is total plan-review days minus the days the applicant held the permit for corrections.
Explore This Record
Project Overview
Project Details
Value
$150,000
Type
Residential Construction
Issued
April 29, 2026
Location
Ballard
Contractor Information
Location & Map
Project Description
AADU in Basement Allow housing for one new stacked dwelling unit within an existing structure. Existing detached dwelling unit to remain. Construct alterations to convert one-family to two-family dwelling, per plan
Additional Details
Permit Intelligence
Work performed by
Licensed Contractor
Contractor license
HARDIFC839PC
Review level
Full +
Primary use
Single Family/Duplex
Parcel
DV0079070
Review cycles
2
Plan review days
48
Days in corrections
11
Expires
October 29, 2027
Existing units
0
Units added
1
Units removed
0
Sleeping rooms
0