Preview 316,582 permits — every permit Chicago, Austin and Seattle issued in the last ten years. The full load is in progress, so this is how far it has got. Sourced from city open-data portals. Data as of 2026-09-20.

Seattle · permit 6745573-CN

529 20TH AVE

Construct addition and substantial alterations to existing single family residence convert basement into Accessory Dwelling Unit (ADU) and construct new detached accessory dwelling unit (DADU) per plan.

Permit

Permit type
Building
Class
Residential
Trade
General/Building
Nature of work
Alteration
Work
Addition/Alteration
Status
Completed

Location

City
SEATTLE
State
WA
ZIP
98122

Dates

Applied
2019-12-05
Issued
2020-07-07
Expires
2023-07-07
Completed
2023-06-09
Time to issue
215 days

Value and contractor

Declared value
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Total fee
N/A. Total fee is a premium field which requires a paid plan. However, this permit has no fee on record.

Seattle details

Housing category
Middle Housing
Review cycles
3
Days out for corrections
103
Permit class (Seattle detail)
Single Family/Duplex

Data as of 2026-09-20. View the city's record

Other permits issued in Seattle, July 2020