Base rent $1,618 - $3,493
Beds Studio-2 Beds
Baths 1-2.5

Alley South Lake Union

1259 Thomas St., Seattle, WA

Floor plans

Updated today
This listing displays base rent, which is the rent provided by the property and may not include recurring monthly fees and costs. Contact the property for more information. It does not include application fees, variable costs, and optional charges such as application fees, utility costs, pet charges, etc.
$Some units at this property may be income restricted
0x1 A
0x1 A
Studio / 1 Bath / 367 Sqft
$1,618 - $1,748
Unit Base rent Availability
631 $1,495 - $1,714 Now
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231 $1,653 - $1,748 Now
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Loft Option (1x1x5 jpg.jpg
1x1.5 Loft A
1 Bed / 1.5 Baths / 695 Sqft
$1,975 - $2,211
Unit Base rent Availability
119 $1,895 - $2,077 Now
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118 $1,895 - $2,191 Now
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1x1.5 800 sq ft
1x1.5 TH
1 Bed / 1.5 Baths / 800 Sqft
$2,189 - $2,326
Unit Base rent Availability
126 $2,170 - $2,295 Now
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128 $2,180 - $2,305 Dec 11
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2x2A 915 sqft.jpg
2x2 A
2 Beds / 2 Baths / 915 Sqft
$3,303 - $3,493
Unit Base rent Availability
405 $3,303 - $3,493 Now
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3D tour
2x2 B 958 sqft.jpg
2x2 B
2 Beds / 2 Baths / 958 Sqft
$3,056 - $3,232
Unit Base rent Availability
202 $3,056 - $3,232 Now
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Studio
0x1 B
Studio / 1 Bath / 410 Sqft
$1,651 - $1,799
Unit Base rent Availability
541 $1,651 - $1,746 Nov 16
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543 $1,651 - $1,746 Nov 16
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Studio plus 556
0x1 Plus A
Studio / 1 Bath / 556 Sqft
$1,885 - $1,993
Unit Base rent Availability
209 $1,885 - $1,993 Dec 3
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Studio plus C 786
0x1 Plus C
Studio / 1 Bath / 786 Sqft
$2,022 - $2,138
Unit Base rent Availability
434 $2,022 - $2,138 Dec 18
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Open studio 663
Open 1
Studio / 1 Bath / 633 Sqft
$1,795 - $1,898
Unit Base rent Availability
512 $1,795 - $1,898 Dec 15
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A top-down view of a small apartment with a kitchen, living room, and bathroom.
1x1 B
1 Bed / 1 Bath / 670 Sqft
$2,151 - $2,275
Unit Base rent Availability
532 $2,132 - $2,255 Nov 26
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One Bed 1.5 bath
1x1.5 Loft B
1 Bed / 1.5 Baths / 788 Sqft
$2,230 - $2,401
Unit Base rent Availability
102 $2,210 - $2,337 Nov 22
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106 $2,250 - $2,379 Dec 11
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Studio 494
0x1 C
Studio / 1 Bath / 494 Sqft
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A top-down view of a house layout with a kitchen, living room, and two bedrooms.
0x1 Plus B
Studio / 1 Bath / 590 Sqft
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One Bedroom One bath 588
1x1 A
1 Bed / 1 Bath / 588 Sqft
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A top-down view of a small apartment with a bedroom, living room, and kitchen area.
1x1 C
1 Bed / 1 Bath / 699 Sqft
$2,136 - $2,259

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One bed one bath 796
1x1 D
1 Bed / 1 Bath / 796 Sqft
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One bedroom one bath
1x1 Den A
1 Bed / 1 Bath / 714 Sqft
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1x1 Den B
1x1 Den B
1 Bed / 1 Bath / 790 Sqft
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1x1.5 bath 896
1x1.5 Loft C
1 Bed / 1.5 Baths / 896 Sqft
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1x1.5 1015
1x1.5 Loft D
1 Bed / 1.5 Baths / 1,015 Sqft
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3D tour
2x1x5 TH 1070 sqft.jpg
2x1.5 TH
2 Beds / 1.5 Baths / 1,070 Sqft
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2x1x5 Loft 1660 sqft.jpg
2x1.5 Loft
2 Beds / 1.5 Baths / 1,660 Sqft
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2x2 C 973 sqft.jpg
2x2 C
2 Beds / 2 Baths / 973 Sqft
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Two Bedroom Option 1 962
2x2 D
2 Beds / 2 Baths / 1,272 Sqft
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2x2x5 Den TH 1246 sqft.jpg
2x2.5 Den TH
2 Beds / 2.5 Baths / 1,246 Sqft
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What makes this property special?

These apartments combine loft-style finishes with air conditioning, quartz counters, stainless steel appliances, and in-home washers and dryers. Some residences add concrete floors, brick details, and a private patio or deck. Community spaces include rooftop gardens, a lounge, fitness center, media room, and direct access to Cascade Park and walking trails.

Policies

Application fees $19

There may be additional unit-specific fees. Please select a unit and move-in date here.

One-time pet fees $250

Security pet deposit $250

Monthly pet rent $30

Pet limit 2 allowed. 2 Pets Max.

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The fees are estimates and actual amounts may vary. Pricing and availability are subject to change. For details, contact the property.

Rent specials

Get Six Weeks Free Rent on All Apartment Homes! *Based on approved credit. Available for a limited time. Other conditions may apply. Offers vary by floor plan.

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Amenities

Apartment amenities

  • Sleek quartz countertops and subway tile backsplash
  • Air conditioning
  • Environmentally sustainable design (LEED certified)
  • Concrete floors in lofts and townhomes
  • Historic brick architecture in some residences
  • Stainless steel kitchen appliance package
  • Washer/dryer in every home
  • Stylish wood plank style flooring
  • Exterior deck or private patio
  • Expansive windows

Community amenities

  • Rooftop decks with gardens, grilling stations and fire pit
  • Resident lounge with billiards, fireplace and kitchen
  • 24/7 state of the art fitness center
  • Controlled building entry access
  • EV charging stations
  • Valet dry cleaning and package notifications via concierge
  • Direct access to Cascade Park and Seattle walking trails
  • Panoramic rooftop views of Lake Union and Downtown Seattle
  • Media room with 80 inch HDTV and cozy seating
  • Private conference room with free Wi-Fi
  • Underground, controlled access garage parking available
  • Complimentary bike storage
  • Ground floor dining, shopping and services

Services

We prioritize your convenience with Renter Essentials that help you move in easily and live comfortably at Alley South Lake Union.

  • Flex rent payments

3D tours

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Ratings and reviews

3.5 Very good
11 Reviews

What renters are saying

Residents appreciate the great amenities and generally find the staff to be good. Many have expressed gratitude for smooth move-in experiences and the overall quality of their new apartments.

Noise 3.5
Location 4.0
Value 3.5
Staff 4.0
Maintenance 4.0
Amenities 3.5
Parking 4.0
Anonymous Current Resident
Jul 27, 2026

Thank you KIKI . i qualified for two free weeks rent free. Gym, Park, Location im very excited. Great service GREAT staff.

Anonymous Former Resident
Jul 27, 2026

I JUST MOVED OUT AND I AM VERY SAD TO RELOCATE. THE STAFF HERE IS AMAZING. KIKI WAS SO VERY HELPFUL ON THE MOVEOUT. EVERYTHING WENT SO SMOOTH AND IF I EVER MOVE BACK TO SEATTLE THIS WILL BE MY FIRST OPTION. THANK YOU KIKI FOR JUST BEING GREAT AND ALWAYS HAVING A GREAT ATTITUDE.

Current T. Verified Resident
Jan 23, 2026

Simple building repairs like elevator buttons and other cosmetic features in disrepair make the building look rundown. I live on the 6th floor and I can't get between 5 am and 10 am. Yes, lots of people are using hotwater at that time, which means that the building should add a booster instead of punishing those of us who may pay higher rent for more desirable units (top floor corner unit in my case) who can't get hot water at peak hours or when the boiler is cold.

Anonymous Verified Resident
Feb 17, 2025

The rent is affordable and the surrounding neighborhood is nice.

Matt G. Verified Resident
Sep 1, 2023

Amazing. Greqt review app and app and help. Garteful for my new apartment. Smooth seas ahead

Anonymous Verified Resident
Aug 1, 2023

Nice place. Location is a little sketchy some parts of the year but have never had a problem.


Building details

1 buildings in the community 172 apartments in the community 6 stories per building Building constructed in 2006 Green building

Property description

South Lake Union is a neighborhood with a reputation for live-work-play and Union Bay Apartments is in the middle of it all. Centered in the forefront of Downtown Seattle's trendiest area, many cannot wait to call Union Bay Apartments home. Designed for the savvy urban dweller, our studio, one and two-bedroom homes come in a variety of spacious floorplans that feature in-unit washer and dryer,...
South Lake Union is a neighborhood with a reputation for live-work-play and Union Bay Apartments is in the middle of it all. Centered in the forefront of Downtown Seattle's trendiest area, many cannot wait to call Union Bay Apartments home. Designed for the savvy urban dweller, our studio, one and two-bedroom homes come in a variety of spacious floorplans that feature in-unit washer and dryer, stainless steel appliances and more. You can find many ways to unwind and relax in our pet-friendly community, including taking in the views of the Space Needle and Lake Union from one of the largest rooftop terraces in all of South Lake Union! We can't wait to show you your new home, so schedule your tour today!

Neighborhood

A lively, mixed-use area where big names like Nordstrom and Pacific Place mix with countless casual food spots and tons of health clinics. • Pacific Place and Target keep the shopping practical, while spots like Lyon's Grocery add a little local flavor. • All the everyday eating is covered, with everything from MOD Pizza and Dick's Drive-In to Shake Shack and Molly Moon's Homemade Ice Cream. • With Bartell Drugs, One Medical, Virginia Mason Hospital, and Swedish Medical Center, healthcare optio
1259 Thomas St., Seattle, WA 98109
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Contact information

Property managed by: Asset Living
PUI Company

Call leasing office: (206) 457-1423

Property office hours:
Today 9:00AM-6:00PM
  • Tuesday 9:00AM-6:00PM
  • Wednesday 9:00AM-6:00PM
  • Thursday 9:00AM-6:00PM
  • Friday 9:00AM-6:00PM
  • Saturday 10:00AM-5:00PM

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Frequently asked questions

When were prices and availability for this property last updated?

Prices and availability for this property were last updated Today.

What floorplans are available?

The following floorplans are available: studio apartments from $1,618, 1-bedroom apartments from $1,975 and 2-bedrooms apartments from $3,056.

What are the most popular nearby apartments?

The most popular nearby apartments are: Alley South Lake Union, Skye Apartments, Soren Apartments and Maris.

How many units are available?

Currently, Alley South Lake Union has 18 available units.

What neighborhood is Alley South Lake Union in?

Alley South Lake Union is located in the Cascade neighborhood.

What are the business hours?

The business hours are:

  • Tuesday 9:00AM-6:00PM
  • Wednesday 9:00AM-6:00PM
  • Thursday 9:00AM-6:00PM
  • Friday 9:00AM-6:00PM
  • Saturday 10:00AM-5:00PM