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Sean C Nielsen

Sean C Nielsen
Real Estate Agent (Real Estate Broker)
Mercer Island WA

Real Estate Broker (WA: 84762)

21 years experience

REALTOR® 13 Active Listings Serves King County, WA
View on Realtor.com

Contact Information

Brokerage
Engel & Völkers Mercer Island

Office Website
Office Address
2690 Se 76th Ave
Mercer Island, WA  98040-2741
(King County)
Office Phone
206-232-2405
Office Fax
206-260-6401
Mobile
206-232-2405
Email
sean********@************.com
Show Email for $5

Service Areas

East Renton Highlands: WA Newcastle: WA Renton: WA Seattle: WA Bellevue: WA Kirkland: WA Redmond: WA

About Sean Nielsen

Sean, a lifelong resident of the Pacific Northwest, possesses a profound insight into the region's real estate landscape and its varied communities. He focuses primarily on urban properties, guiding clients who wish to transition from suburban residences in areas like Bellevue, Lakemont, West Seattle, and Ballard to modern, eco-friendly condominiums.

His reputation as a leading figure in residential real estate is built on strong, trust-based relationships and a commitment to excellence. Sean's meticulous attention to detail, dedication to outstanding customer service, and adept negotiation skills consistently yield positive outcomes for his clients.

In addition to his real estate acumen, Sean is a skilled marketer with a deep understanding of effective property positioning. Partnering with the prestigious Sotheby's International Realty brand, he provides unparalleled exposure for listings, ensuring that buyers and sellers benefit from every possible advantage in the market.

Sean holds degrees in Biology and Psychology from Western Washington University. Outside of his professional pursuits, he is an enthusiastic athlete, enjoying soccer, golf, and basketball. His diverse background, professional training, and genuine passion for real estate make him a valued partner for clients navigating their real estate journeys. Sean is prepared to assist with all your real estate needs today.

King County, WA Real Estate Market Analysis (Single Family Homes)

$1,536,848
Avg. Listing Price
From Sean's portfolio
3.8 / 3.0
Avg. Beds/Baths
Typical property size
2,583 sf
Avg. Square Footage
Interior living space
4238
Active Listings
Current inventory

King County, Washington stands as one of the Pacific Northwest's most dynamic and complex real estate markets, anchored by Seattle's tech-driven economy and stretching from Puget Sound's waterfront communities to the foothills of the Cascade Mountains. With 8,434 actively licensed real estate agents serving the region, this market reflects both the opportunities and challenges of a geography that encompasses everything from million-dollar waterfront estates in Medina to suburban family homes in Renton and rural properties in the eastern reaches of the county.

The sheer density of real estate professionals—all 8,434 agents maintaining current email contact information—speaks to the market's intensity and the sophisticated level of service required to navigate King County's diverse neighborhoods. From the urban condominiums of Belltown to the historic charm of Georgetown, agents here must understand micro-markets that can vary dramatically within just a few miles, making local expertise absolutely crucial for buyers, sellers, and investors alike.

Major King County, Washington Real Estate Markets

Seattle dominates the county's real estate landscape, but the market extends far beyond the Emerald City's boundaries to include established suburban centers like Bellevue, Redmond, and Kirkland on the Eastside, each commanding premium prices due to proximity to major tech employers. The South Sound communities of Federal Way, Kent, and Auburn offer more affordable entry points while still providing access to the region's employment centers, creating distinct investor and first-time buyer segments that savvy agents actively cultivate.

What surprises many newcomers is how significantly markets can differ between areas like Vashon Island's rural residential properties and the high-rise luxury market in downtown Bellevue, or between the artist communities in Georgetown and the executive estates of Sammamish. These variations create specialized niches where agents develop deep expertise in specific property types, price ranges, and buyer demographics, from international investors seeking Seattle penthouses to families relocating from other tech hubs.

Market Dynamics and Geographic Complexity

King County's real estate market operates with unique seasonal patterns influenced by the region's tech industry hiring cycles, university schedules from the University of Washington, and the infamous Pacific Northwest weather. The market typically sees spring surges that extend later into summer than most regions, while winter months bring opportunities for serious buyers willing to compete with fewer bidders, particularly in the luxury segments around Lake Washington and the high-end neighborhoods of Queen Anne and Capitol Hill.

Geographic constraints including Puget Sound, Lake Washington, and steep topography create natural boundaries that limit inventory and drive competition, while zoning restrictions and environmental considerations add layers of complexity that require agents to stay current on municipal regulations across dozens of different jurisdictions within the county. This complexity explains why successful agents often specialize in specific cities or neighborhoods rather than attempting to cover the entire county market.

Why Businesses Need King County, Washington Agent Contact Data

Mortgage lenders, home service providers, and real estate technology companies find King County's agent network particularly valuable because these professionals handle some of the highest-value transactions in the Pacific Northwest while serving clients who demand cutting-edge tools and services. The concentration of tech-savvy buyers and sellers means agents here quickly adopt new platforms, making them ideal early adopters for innovative real estate solutions and premium service offerings.

Having direct email access to all 8,434 licensed agents enables businesses to efficiently reach decision-makers in a market where agents frequently collaborate on complex transactions, refer clients for specialized services, and seek vendors who understand the unique demands of King County's fast-paced, high-stakes real estate environment. This comprehensive contact database becomes essential for any company serious about establishing a foothold in one of America's most influential regional real estate markets.

Current Property Listings

As of 2/17/2026, Sean Nielsen has 13 properties for sale in Mercer Island and surrounding areas. These are the top 10 listings.

$189,000

Listed 2025-09-03

Owl Ridge Dr Lot 3
Cle Elum, WA  98922

Beds:
Baths:
Sq Ft:
Lot: 130,680 sf
Land Map
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$2,649,999

Listed 2025-09-05

261 Cabin Trail Dr
Cle Elum, WA  98922

Beds: 5.0
Baths: 5.5
Sq Ft: 4,463
Lot: 7,405 sf
Single Family Map
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$2,195,000

Listed 2025-09-29

251 Southern Star Ln
Cle Elum, WA  98922

Beds: 4.0
Baths: 4.5
Sq Ft: 3,596
Lot: 23,958 sf
Single Family Map
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$649,000

Listed 2025-11-02

220 Tired Creek Ln Lot 8-11
Cle Elum, WA  98922

Beds:
Baths:
Sq Ft:
Lot: 56,628 sf
Land Map
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$1,249,000

Listed 2026-01-21

197 Skyview Dr
Ellensburg, WA  98926

Beds: 3.0
Baths: 2.0
Sq Ft: 2,489
Lot: 47,045 sf
Single Family Map
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$985,000

Listed 2026-01-21

81 Wildflower Loop
Cle Elum, WA  98922

Beds: 2.0
Baths: 3.5
Sq Ft: 1,537
Lot: 1,769 sf
Single Family Map
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$2,195,000

Listed 2026-01-15

331 Old Grove Trl
Cle Elum, WA  98922

Beds: 4.0
Baths: 6.5
Sq Ft: 3,562
Lot: 17,860 sf
Single Family Map
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$1,595,000

Listed 2026-02-06

10650 NE 9th Pl Unit 2427
Bellevue, WA  98004

Beds: 1.0
Baths: 1.0
Sq Ft: 926
Condos Map
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$985,000

Listed 2026-02-17

889 103rd Ave SE Unit 410
Bellevue, WA  98004

Beds: 1.0
Baths: 1.0
Sq Ft: 638
Condos Map
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$2,650,000

Listed 2024-08-05

201 Cabin Trail Dr
Cle Elum, WA  98922

Beds: 5.0
Baths: 5.5
Sq Ft: 4,495
Lot: 10,454 sf
Single Family Map
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Current Property Rentals

As of 2/17/2026, Sean Nielsen has the following rental properties available in Mercer Island and surrounding areas. These are the top 10 listings.

$2,200

Listed 2025-12-21

2319 1st Ave Apt 203
Seattle, WA  98121

Beds: 1.0
Baths: 1.0
Sq Ft: 652
Condos Map
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