South Lake Union Real Estate Agent

South Lake Union market snapshot

Median Sale Price$611,000▼ 6.0% YoY

Price / Sq Ft$693▼ 4.0% YoY

Median Days on Market42▲ 13.5% YoY

Sale-to-List98.0%± 0.0% YoY

Over the trailing twelve months, the median South Lake Union home sold for about $611,000 — down 6.0% from a year earlier. Homes here typically went under contract in about 42 days at roughly 98.0% of list price (around $693/sq ft), reflecting a slower, more buyer-friendly condo market. These rolling 12-month figures (NWMLS, June 2026) cover the broader market area around South Lake Union rather than South Lake Union on its own, so for any specific home it is worth comparing recent sales on that block.

About South Lake Union

South Lake Union sits at the center of Seattle, on the south shore of Lake Union, roughly bounded by Denny Way to the south, Interstate 5 to the east, Aurora Avenue N. and 7th Avenue N. to the west, and the lake to the north. As is common in Seattle, its edges are not sharply fixed. The eastern portion, along and east of Fairview Avenue N., is historically known as Cascade, once home to Russian, Swedish, Norwegian, and Greek immigrant communities centered on the 1894 Cascade School.

Once a district of warehouses, parking lots, and low industrial buildings, South Lake Union was substantially redeveloped beginning in the 2000s. Amazon consolidated its Seattle headquarters here starting in 2010, and the neighborhood also hosts life-science and research institutions including the Fred Hutchinson Cancer Center, divisions of the Allen Institute, Seattle Children's research operations, and University of Washington Medicine facilities.

Housing & homes

South Lake Union's housing is overwhelmingly multifamily and comparatively new. Redevelopment since the early 2000s added roughly 1,850 residential units, predominantly market-rate apartments and condominiums alongside income-restricted units. Most inventory sits in mid- and high-rise buildings rather than detached houses.

Condominium projects such as 2200 Westlake, completed in 2006 and made up of three towers (Aria, Azur, and Arte), are typical of the for-sale stock, and purpose-built rental high-rises are common throughout the neighborhood. Because the area is zoned Seattle Mixed (SM), buildings frequently combine residential, office, laboratory, and retail uses, and many towers rise well above surrounding older structures. Buyers here are generally purchasing condominium units rather than single-family homes.

Local conditions to know

South Lake Union fronts Lake Union, and much of the low-lying, formerly industrial land near the shoreline lies within Seattle's mapped liquefaction-prone areas, a seismic consideration the city tracks under its Environmentally Critical Areas (ECA) code and Director's Rule DR 2-2023. Filled and saturated soils near water bodies are the settings most associated with liquefaction during strong shaking, so lenders, insurers, and buyers may ask about a building's construction and seismic detailing.

Transit access is a defining feature. The South Lake Union Streetcar links the neighborhood to Westlake in downtown, where riders can connect to Sound Transit Link light rail and the Seattle Center Monorail. Lake Union is also an active seaplane base: Kenmore Air operates a terminal at the south end of the lake, so aircraft noise from floatplane traffic is part of the waterfront environment. The Mercer Street corridor, rebuilt into a wider two-way boulevard, and the adjacent I-5 interchange carry heavy traffic through the area's southern and eastern edges.

Getting around & local texture

Lake Union Park, completed in 2010 at the south end of the lake, anchors the waterfront and is home to the Museum of History & Industry (MOHAI), which relocated to the former Naval Reserve building in 2012, and the Center for Wooden Boats. The park provides public shoreline access and moorage for historic vessels. Commercial activity concentrates along Westlake, Terry, Denny, and Mercer, with a dense mix of offices, laboratories, restaurants, and shops built into the neighborhood's mixed-use towers.

South Lake Union is served by Seattle Public Schools. According to the district's attendance-area assignments, addresses here are within the Lowell Elementary attendance area, and the district publishes official attendance-area maps and an address lookup tool to confirm the assigned elementary, middle, and high school for any specific address. Because boundaries and assignments change, verify current assignment directly with Seattle Public Schools.

What buyers & sellers weigh in South Lake Union

Most for-sale inventory is condominiums, so review HOA dues, reserves, and building financials early.
Much of the lakefront and Cascade area is in a city-mapped liquefaction-prone zone; ask about a building's seismic construction.
Seaplane operations on Lake Union mean waterfront units can experience floatplane noise.
Seattle Mixed (SM) zoning allows tall mixed-use towers, so views and light can change as neighboring parcels redevelop.
Streetcar and connections to Link light rail make many buildings car-optional; confirm parking is included where you need it.
Confirm the current Seattle Public Schools attendance-area assignment for any address, as boundaries change.

What makes South Lake Union distinct

A dense, largely new mixed-use neighborhood built on former industrial land, unlike the older single-family character of nearby Queen Anne or Eastlake.
Direct Lake Union waterfront with Lake Union Park, MOHAI, and the Center for Wooden Boats at the south end.
Seattle Mixed zoning that puts homes, labs, offices, and retail in the same buildings and supports high-rise development.
A concentration of technology and life-science employers, including Amazon's headquarters campus and major research institutions.
Streetcar service connecting to downtown, Link light rail, and the monorail, plus a seaplane terminal on the lake.

Services in South Lake Union

All services

South Lake Union real estate FAQ

What kind of homes are for sale in South Lake Union?

Almost entirely condominiums and apartments in mid- and high-rise buildings. The neighborhood was redeveloped mainly in the 2000s and 2010s, so detached single-family houses are rare.

What schools serve South Lake Union?

The neighborhood is part of Seattle Public Schools. District attendance-area assignments place addresses here in the Lowell Elementary attendance area; use the district's official attendance-area maps and address lookup tool to confirm the assigned elementary, middle, and high school for a specific address, since boundaries change.

Are there environmental or transit factors to know about?

Yes. Much of the low-lying land near Lake Union is within Seattle's mapped liquefaction-prone areas, a seismic consideration. The neighborhood is served by the South Lake Union Streetcar with connections to Link light rail downtown, and Lake Union hosts a seaplane terminal, so waterfront units can experience floatplane noise.