Pioneer Square · Seattle

Verified Data Updated May 2026

Jackson Square

121 S Jackson St

1902
Year Built
7
Total Units
Mid-Rise
Type
Jackson Square condominiums in Pioneer Square, Seattle

Jackson Square: Key Facts

Building: Jackson Square
Address: 121 S Jackson St, Seattle, WA
Neighborhood: Pioneer Square
Year Built: 1902
Total Units: 7
Type: Mid-Rise

Profile by Jeff Reynolds, Seattle Condo Specialist · Compass Real Estate · 20+ years, 500+ transactions

Verified Updated May 2026

About Jackson Square

Jackson Square is a Mid-Rise building in Pioneer Square, Seattle. Built in 1902 with 7 residences.

Jackson Square sits in Seattle’s historic district, steps from Lumen Field, T-Mobile Park, and the Elliott Bay waterfront.

Building Details

Address121 S Jackson St
NeighborhoodPioneer Square, Seattle
Year Built1902
Total Units7
TypeMid-Rise

Jackson Square is positioned walking distance to downtown, the stadium district, and the Pioneer Square tech cluster, with light rail at Pioneer Square Station and major bus corridors.

Frequently Asked Questions

Where is Jackson Square located in Seattle?

Jackson Square is located in Pioneer Square, Seattle at 121 S Jackson St. The building is positioned in Seattle’s historic district, steps from Lumen Field, T-Mobile Park, and the Elliott Bay waterfront.

How many units does Jackson Square have?

Jackson Square has 7 units in a mid-rise format. The building was completed in 1902. Contact Jeff Reynolds for current unit availability, recent comparable sales, and listing data at Jackson Square.

What year was Jackson Square built?

Jackson Square was built in 1902, making it about 124 years old. Buildings of this vintage are at or approaching major capital expenditure cycles for systems like roofs, elevators, plumbing, and facade components. A strong reserve fund and current reserve study are essential safeguards for buyers in buildings of this age.

Jeff Reynolds, Seattle condo specialist

Jeff Reynolds

Seattle Condo Specialist · Compass Real Estate · 20+ Years

Jeff Reynolds has spent 20+ years exclusively focused on Seattle's condo market, closing 500+ transactions and personally profiling 200+ buildings. His building-level expertise, grounded in HOA financials, reserve fund health, construction quality, and resale performance, is the foundation of every recommendation on this site. Have a question about Jackson Square?

Ask Jeff About Jackson Square

Or call directly: 206-794-1118 · jeff.reynolds@compass.com