Pioneer Square · Seattle
Verified Data Updated May 2026Jackson Square
121 S Jackson St
Jackson Square: Key Facts
Profile by Jeff Reynolds, Seattle Condo Specialist · Compass Real Estate · 20+ years, 500+ transactions
Live Listings at Jackson Square
Jeff's Live SearchNo active listings at Jackson Square right now.
As of August 10, 2026. Units here move quietly. See recent sales (1 tracked) and get alerted the moment one lists.
Listings courtesy of NWMLS as distributed by MLS Grid. Listing data as of August 10, 2026. Listing counts and pricing come from the live MLS feed and are shown separately from the Seattle Condo Authority building profile above.
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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
| Address | 121 S Jackson St |
| Neighborhood | Pioneer Square, Seattle |
| Year Built | 1902 |
| Total Units | 7 |
| Type | Mid-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.
Authority Pathways
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Neighborhood
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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 210+ 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?