Mercer Island

Site map · 1 parcel© OpenStreetMap contributors © OpenFreeMap© OpenStreetMap © OpenFreeMap

4115 78th Ave SE

Mercer Island, WA

ConstructionIssued Apr 08, 2026

1 parcel · 4 permitsLast activity Apr 8, 2026

$1.3M

Est. Value

Units

Land use

Issued Nov 10, 2025

Construction

Issued Apr 08, 2026

Completed

—

Permits

4 permits · 2 stages

Permit	Status	Submitted	Issued	Finaled	Value
Land use3 permits
CAO25-017	Under Review	Jul 31, 2025	—	—	—
	NSFR ON VACANT LOT Submitted Jul 31, 2025
DEV26-002	APPROVED	Jan 20, 2026	Feb 11, 2026	—	—
	NSFR ON VACANT LOT Submitted Jan 20, 2026Issued Feb 11, 2026
ADU25-011	APPROVED	Jul 31, 2025	Nov 10, 2025	—	—
	NSFR ON VACANT LOT Submitted Jul 31, 2025Issued Nov 10, 2025
Construction1 permit
2508-021	Issued	Aug 04, 2025	Apr 08, 2026	—	$1.3M
	NEW 4462 SF SFR W/ADU ON VACANT LOT Submitted Aug 04, 2025Issued Apr 08, 2026

Permit data from MyBuildingPermit

4 sections · with Pro

More about 4115 78th Ave SE

The land and its zoningPro
Parcel numbers, lot sizes, assessed values and zoning
1 parcel
Sales historyPro
Recorded sales of this property, with the date and price of each
Press coveragePlus
News articles about this project, with the date of each
ContactsPro
The applicant
1 contact

Last activity Jul 9, 2026

3 units

Last activity Aug 17, 2026

$983K · 1 unit

Last activity Jan 25, 2024

1 unit

Last activity May 13, 2026

1 unit

Last activity Mar 19, 2026

$1.0M

Last activity Jul 24, 2025