- Now Leasing · Studios · Open 1BR · 1BR
A boutique apartment building on a quiet
Capitol Hill corner
Stream 403 is a 56-apartment Built Green 4-Star boutique residence on the corner of Belmont and Harrison — one of the quietest streets in Capitol Hill, Seattle. Eight thoughtful floor plans across studios, open one-bedrooms, and one-bedrooms, each designed for the way Capitol Hill actually lives: coffee on the corner, Light Rail two blocks away, the rooftop for everything in between. Live it up.
- 01 · A streamlined community
Stream 403 is a Built Green boutique residence on the quiet corner of Belmont and Harrison. Studios, open one-bedrooms, and one-bedrooms designed for the way Capitol Hill actually lives — coffee on the corner, light rail down the block, the rooftop for everything else. Live it up.
Stream 403 · Capitol Hill · Built Green
- 02 · What makes it ours
Four reasons to
live at Stream 403
- 01
Live It Up
A rooftop terrace with skyline views of the Space Needle, Lake Union, and Mount Rainier — plus a communal BBQ and lounge built for sunset hangs. The signature moment of the building, and the easiest reason to bring friends over.
- 02
Intentionally Designed
Eight floor plans across studios, open one-bedrooms, and one-bedroom apartments — each with smart key-fob entry, full-size appliances, and layouts that earn their square footage. From compact studios to corner one-bedrooms with skyline views.
- 03
The Neighborhood
Two blocks from Capitol Hill Light Rail Station — direct lines to downtown Seattle, the University District, and SeaTac Airport. Walk to Broadway, Pike/Pine, Volunteer Park, and Cal Anderson in under 10 minutes. I-5 on-ramps under half a mile.
- 04
Ecologically Sound
Stream 403 is a Built Green 4-Star certified apartment community — one of a small group of Capitol Hill buildings built to that standard. Our certification has helped plant more than 1,800 trees across Western Washington, and it shows up in your unit: better insulation, lower utility bills, healthier indoor air.
- 03 · The neighborhood
A quiet Capitol Hill address two blocks from Light Rail
403 Belmont Ave E sits on the corner of Belmont and Harrison — between the energy of Broadway and the convenience of I-5, but tucked off the main street where it’s actually quiet. Capitol Hill Light Rail is two blocks away. Volunteer Park, Cal Anderson, and Pike/Pine are a 10-minute walk. Coffee, groceries, and restaurants in every direction.
Living in the heart of the city doesn’t get much better than this. The perfect distance from Broadway, Pike/Pine, downtown — and convenient access to I-5 brings you right here to this quiet corner on Belmont and Harrison.
From the leasing office
About the location
Sometimes living in the city means having to eat out once in a while — that is a pretty convenient situation to be in around here. The neighborhood is rich with coffee shops, restaurants, and historic Capitol Hill character.
About the neighborhood
Capitol Hill
Building sustainable structures that not only serve our residents but also complement our environment is our goal. We are proud to be Built Green.
About sustainability
Built Green
- 04 · The building
Apartment amenities at Stream 403
Every Stream 403 apartment includes smart key-fob entry, in-unit laundry, full-size appliances, and access to the rooftop terrace, on-site fitness center, secure package lockers, and bike storage. Cats and dogs welcome.
Rooftop Terrace
Park On Top
Communal BBQ · skyline views
Fitness Center
24/7 Fitness Center
Cardio, free weights, and training essentials, just downstairs
Views
Skyline Views
Select residences look out over downtown Seattle, Puget Sound, and the Cascades
Package Lockers
Parcel Pending
Parcel Pending system, secure 24/7 access for every delivery
Flex Storage
Bike & Storage Lockers
Dero bike lockers and dedicated storage for every resident who needs it
Smart Homes
Keyless Entry
Smart key-fob locks on every unit and every common door
Pet policy
Pet-Friendly
Cats and dogs welcome (2 max). 50/mo rent per pet
Sustainability
Built Green 4-Star
Certified sustainable construction. 1,800+ trees planted in Western Washington
- 05 · Eight floor plans
Studios, open 1BR,
and one-bedroom apartments
Choose from eight floor plans — efficient studios, open one-bedrooms with a partial wall, and full one-bedroom apartments with a separate bedroom. Studios start at $1,875/mo. One-bedrooms include corner units with skyline views.
What residents say about
living at Stream 403
Frequently asked questions
about Stream 403
How much is rent at Stream 403?
Studios at Stream 403 start around 3,195/month, depending on floor plan, view, and availability. We update available floor plans and live pricing on our floor plans page. Capitol Hill’s average rent in 2026 is $2,085/month, putting Stream 403 in the middle of the market with above-average amenities and Built Green 4-Star certification.
Is Stream 403 pet-friendly?
Yes. Stream 403 welcomes cats and dogs — up to two pets per apartment. The pet policy is a 50/month pet rent. There are no breed restrictions specific to the building.
How close is Stream 403 to Capitol Hill Light Rail?
Capitol Hill Light Rail Station is approximately two blocks from Stream 403, an easy 5-minute walk. The Link Light Rail provides direct service to downtown Seattle, the University District, and SeaTac Airport without a transfer.
What does "Built Green 4-Star" mean for residents?
Built Green 4-Star is a regional sustainable-building certification administered by the Master Builders Association of King and Snohomish Counties. For Stream 403 residents, it means better insulation (lower heating and cooling bills), healthier indoor air, water-efficient fixtures, and construction practices that planted 1,800+ trees in Western Washington. Stream 403 is one of a small number of Capitol Hill apartment buildings certified at the 4-Star level.
Is Stream 403 a quiet building?
Yes. Stream 403 sits on the corner of Belmont and Harrison — a residential side street one block off Broadway, well away from Capitol Hill’s nightlife corridor. Residents consistently mention the building’s quiet on Google reviews, and the construction quality (Built Green 4-Star) includes upgraded insulation that reduces between-unit sound transfer.
What floor plans are available at Stream 403?
Stream 403 has eight floor plans across three categories: studios (Unit A, A2), open one-bedrooms with a partial bedroom wall (Unit C, C2), and full one-bedroom apartments with a separate bedroom (Unit B, D, D2, E). Total of 56 apartments across eight floors. View the floor plans page for layouts and current availability.
- Tour Stream 403 — daily tours, fast replies
A rooftop park, on top of your apartment
The rooftop terrace at Stream 403 is the way Capitol Hill actually unwinds — sunsets over Puget Sound, summer BBQs with friends, and a quiet morning coffee with the Space Needle in the distance. A community park on top of your home, open year-round.
- 06 · Schedule a tour
Come see it. Tours daily.
Pick a time, tell us which floor plan interests you, and we’ll walk you through the building, the rooftop, and the fitness center. We reply within one business day.
Leasing Office
- 403 Belmont Ave E Seattle, WA 98102
- (206) 325-5899
- info@stream403.com
Hours
- Mon–Fri 9am - 6pm
- Closed Sundays