Additions and square-footage expansions permitted in Seattle. These are the largest residential projects a homeowner undertakes and carry the highest declared values.
25 permits listed
$17,689,723 declared value
Seattle Open Data source
Live updated on load
Recent permits
7550 M L KING JR WAY S$2,000,000
LAND USE STATEMENT - Change of use from place of worship to medical clinic. Construct alterations and additions to convert a place of religious worship [ROSEHILL BAPTIST CHURCH] to medical clinic occupy per plan.
Filed 2026-08-12 · addition alteration · filed
4040 7TH AVE NE$1,250,000
Allow one additional unit in multifamily housing per land use code. Construct as alterations for fitness and bike storage alterations and addition to existing apartment building (Gillman Apts.) and occupy per plan.
Filed 2026-07-31 · addition alteration · unknown
932 18TH AVE E$1,000,000
Construct substantial alterations and addition to existing one family dwelling per plan.
Filed 2026-07-08 · addition alteration · unknown
943 NW 58TH ST$931,822
Allow addition of (2) attached housing units to an existing single unit (no work) per the land use code. Construct a new two-family dwelling per plans
Filed 2026-10-27 · new construction · filed
3804 E SUPERIOR ST$850,000
Construct additions and alterations to existing single family residence per plan.
Filed 2026-10-07 · addition alteration · unknown
13758 LAKE CITY WAY NE$850,000
Construct substantial alterations and addition to existing commercial building occupy per plan. Mechanical included.
Filed 2026-07-29 · addition alteration · unknown
807 AURORA AVE N$750,000
LAND USE DESCRIPTION. Construct substantial alterations and vestibule addition to convert vacant warehouse [C & S AUTOMOBILE] to institutional building [BANNER CHURCH] occupy per plan.
Construct additions and alterations to existing one family dwelling per plan.
Filed 2026-08-27 · addition alteration · unknown
4801 SW HILL ST$684,104
Construct substantial alterations and additions for one-family dwelling per plan.
Filed 2026-10-13 · addition alteration · unknown
2537 MONTAVISTA PL W$670,644
Construct substantial alterations and additions for one family dwelling per plan.
Filed 2026-10-08 · addition alteration · unknown
3020 W GARFIELD ST$653,945
Allow an attached dwelling unit per the land use code. Construct additions and substantial alterations for a two-family dwelling per plans.
Issued 2026-10-13 · addition alteration · issued
2817 11TH AVE E$650,000
Allow housing for (1) new dwelling unit within an existing structure per land use code. Construct alterations and additions and convert one-family dwelling to two-family dwelling per plan.
Filed 2026-08-21 · addition alteration · unknown
2808 W GARFIELD ST$645,417
Construct substantial alterations and additions for one-family dwelling per plan.
Filed 2026-08-24 · addition alteration · unknown
3802 30TH AVE W$600,000
Additions and substantial alterations to existing one-family dwelling per plan.
Filed 2026-08-13 · addition alteration · filed
1124 17TH AVE E$600,000
Construct addition and substantial alterations for a one-family dwelling per plan. Construct new accessory structure per plan.
Issued 2026-10-22 · addition alteration · issued
110 STEWART ST$558,728
Construct addition and alterations on roof level of existing hotel (Thompson Hotel) and occupy per plan.
Filed 2026-10-07 · addition alteration · filed
6201 CARLETON AVE S$500,000
Change use from multifamily to mixed use with retail below and residential above per land use code.Construct additions and alterations to all floor levels and occupy per plan.
Filed 2026-10-21 · addition alteration · filed
1809 N 145TH ST$500,000
Allow housing for new attached dwelling unit within existing structure per land use code. Construct addition and substantial alterations for two family dwelling per plan.
Filed 2026-09-16 · addition alteration · unknown
833 34TH AVE E$500,000
Construct covered porch addition terraces and in-ground swim spa for one-family dwelling per plan.
Filed 2026-10-18 · addition alteration · filed
2122 E SHELBY ST$500,000
Construct addition and alterations to existing one family dwelling per plan.
Issued 2026-10-14 · addition alteration · issued
2926 W BLAINE ST$464,942
Construct addition and substantial alterations to existing one family dwelling per plan.
Filed 2026-10-15 · addition alteration · filed
8157 8TH AVE SW$461,717
Construct addition and substantial alterations in existing one family dwelling per plan.
Issued 2026-10-23 · addition alteration · issued
4833 NE 45TH ST$455,404
Allow housing for one new stacked dwelling unit at an existing structure per land use code. Construct addition & substantial alterations to convert one-family dwelling into two-family dwelling per plan
Filed 2026-07-15 · addition alteration · filed
12033 2ND AVE NE$450,000
Construct 2nd story addition and substantial alterations to one-family dwelling per plan.
Issued 2026-10-20 · addition alteration · issued
3920 BROOKLYN AVE NE$438,000
Construct alterations and additions to parking lot (UW) at northwest corner of lot southwest corner of existing institutional building per plan.
Filed 2026-08-18 · addition alteration · unknown
Need the full list, or another city?
This page shows a sample. The full live feed for one metro and trade is $99/mo, or $299/mo to hold the territory exclusively, See how it works →