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Union Trust Annex Office Building
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115-117 S Main St, Seattle, WA 98104

Transit-accessible office property overlooking Occidental Square.

Property Size26,890 SF
Days on Market49

Property Features for 115-117 S Main St

General Information

Standard status Active
Size 26,890 SF
Property subtype OFFICE

Site & Location

Neighborhood Pioneer Square
Public Transit Yes
Listing Agency: Broderick Group, Inc.
Listed By: Damon McCartney
Source: Moodyscre
Added: Sep 14 Changed: Oct 25 Last Checked: Nov 1 at 8:43AM

Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of Broderick Group, Inc.

Rey
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Investment Insights

Based on property information with market context.

Union Trust Annex is a 26,890-square-foot office building at 115-117 S Main St in Seattle’s Pioneer Square. The property overlooks Occidental Square and sits beside the new Occidental Performance Pavilion, a public gathering space that hosts community events and supports nearby restaurants and retailers.

Ferry, light rail, streetcar, and bus connections are all within a 3-minute walk. The building is near Lumen Field, T-Mobile Park, and the Seattle Convention Center, with City Hall, King County offices, and federal and county courthouses also conveniently accessible. The surrounding area includes restaurants, bars, and the First Thursday Art Walk tradition.

Key Highlights

  • 26,890‑square‑foot office building at 115‑117 S Main St, Seattle, WA 98104
  • Ferry, light rail, streetcar, and bus access within a 3‑minute walk
  • Overlooks Occidental Square beside the new Occidental Performance Pavilion

Property Analytics

Current Use

Office buildings

Suggested Use

Top Pick (Bike/Boat/Book/etc) Store Pet Grooming Service Tanning Salon Veterinary Clinic Electrical Service Pet Store

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Location Intelligence

Trade Area within ½ mile

12,655
Businesses Nearby

Demographics for 98104, WA

16,157
Population
10,803
Households
1.5
Avg Household Size
38
Median Age
45%
College-Educated
83%
High-School Grad
0.9 sq mi
ZIP Area
17,952
Density / Sq Mi
$61,866
Median Household Income
$57,791
Median Earnings
$1,511
Median Rent
$663,000
Median Home Value

Market

Vacancy Rate% for Office in Seattle, WA

8.5% 2019
13.4% 2020
17.6% 2021
19.5% 2022
24.3% 2023
30% 2024
32.3% 2025

Frequently Asked Questions

What type of property is this?
Office building - Transit-accessible office property overlooking Occidental Square.
Where is this office building located?
The property is located at 115-117 S Main St Seattle, WA.
What are key features of this property?
This property features: 26,890‑square‑foot office building at 115‑117 S Main St, Seattle, WA 98104; Ferry, light rail, streetcar, and bus access within a 3‑minute walk; Overlooks Occidental Square beside the new Occidental Performance Pavilion
(206) 838-7633 Call to check price and availability
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