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Sylvia Kos

Sylvia Kos
Real Estate Agent (Broker)
Hinsdale IL

Broker (IL: 475174611)

9 years experience

REALTOR® 1 Active Listings Serves Dupage County, IL
View on Realtor.com

Contact Information

Brokerage
Berkshire Hathaway Homeservices Chicago

Office Website
Office Address
35 S Washington St
Hinsdale, IL  60521
(Dupage County)
Office Phone
630-325-7500
Office Fax
Mobile
630-863-4684
Email
s***@***********.com
Show Email for $5

Service Areas

Westmont: IL Hinsdale: IL Willowbrook: IL Burr Ridge: IL Darien: IL Indian Head Park: IL Hodgkins: IL Willow Springs: IL La Grange: IL Summit: IL Bedford Park: IL Countryside: IL McCook: IL Downers Grove: IL Lemont: IL Homer Glen: IL Palos Park: IL Woodridge: IL Romeoville: IL Tinley Park: IL Orland Hills: IL Orland Park: IL

About Sylvia Kos

Sylvia Kos is an accomplished Realtor with extensive expertise in the Hinsdale, Willowbrook, Burr Ridge, Downers Grove, Clarendon Hills, Westmont, Western Springs, Darien, Lemont, and neighboring areas. Having resided in Hinsdale for over two decades, she possesses a deep understanding of the local market and community dynamics.

With a strong foundation in interior design and a family background in custom home building, Sylvia brings a unique perspective to her real estate practice. Her creative approach, combined with sharp business acumen and exceptional negotiation skills, enables her to provide unparalleled service to her clients. Sylvia remains actively engaged with current market trends, ensuring her clients are well-informed when navigating significant real estate decisions. Her dedication and work ethic drive her to consistently go above and beyond for those she serves.

Client testimonials highlight Sylvia's commitment to excellence. Joanna K. notes, “Sylvia was beyond amazing. She was very attentive to my needs as a first-time homeowner, asking all the right questions during our showings. Her flexible schedule and background in interior design helped me visualize my future home.”

Monika M. adds, “Working with Sylvia Bart was a pleasure. She was hands-on and always accessible, quickly responding to our questions and keeping us informed throughout the process. Thanks to her efforts, our first home purchase was a tremendous success, and we couldn’t be happier with the results!”

Dupage County, IL Real Estate Market Analysis (Single Family Homes)

$810,715
Avg. Listing Price
From Sylvia's portfolio
3.7 / 3.1
Avg. Beds/Baths
Typical property size
2,679 sf
Avg. Square Footage
Interior living space
1402
Active Listings
Current inventory

DuPage County, Illinois stands as one of the most robust and sophisticated real estate markets in the Chicago metropolitan area, with 7,630 actively licensed agents working across its diverse communities. This substantial agent population reflects the county's economic vitality and the complexity of its housing landscape, which spans from luxury suburban enclaves like Hinsdale and Oak Brook to rapidly growing communities such as Naperville and Wheaton.

The county's real estate market benefits from its strategic position as both a major employment hub and a desirable residential destination. With all 7,630 licensed agents maintaining active email contacts, the market demonstrates a high level of digital engagement and professional connectivity that facilitates efficient transactions across price points ranging from starter condos in Glen Ellyn to multi-million dollar estates in Burr Ridge.

Major Dupage County, Illinois Real Estate Markets

Naperville dominates as the county's largest real estate market, consistently ranking among Illinois' most desirable cities for families and professionals. The city's excellent school districts and corporate headquarters presence drive sustained demand, while nearby Downers Grove and Lombard offer more affordable alternatives with similar amenities. Aurora's western sections within DuPage County represent emerging growth areas, particularly appealing to first-time homebuyers seeking value.

The eastern communities of Elmhurst, Villa Park, and Addison benefit from exceptional transportation access to downtown Chicago, creating distinct micro-markets with varying price dynamics. Westmont and Clarendon Hills have emerged as hidden gems for buyers seeking walkable downtown areas, while Lisle attracts technology professionals due to its proximity to the Illinois Technology and Research Corridor.

Market Dynamics and Geographic Complexity

DuPage County's real estate market exhibits remarkable resilience due to its economic diversification, with major employers in healthcare, technology, and finance providing stable demand across multiple price segments. The county's 28 municipalities each maintain distinct character and pricing structures, from the historic charm of Glen Ellyn to the modern corporate environment of Oak Brook, requiring agents to develop specialized local expertise.

Surprisingly, the county's western edge communities like Carol Stream and Glendale Heights have experienced some of the strongest appreciation rates in recent years, as buyers discover excellent value propositions. The market also shows increasing interest in townhome and condominium developments, particularly in Wheaton and Wood Dale, as demographics shift toward lower-maintenance living options.

Why Businesses Need Dupage County, Illinois Agent Contact Data

Real estate service providers, from mortgage lenders to home improvement contractors, require comprehensive agent contact databases to effectively reach DuPage County's extensive network of 7,630 professionals. The county's high transaction volume and affluent client base make it particularly attractive for luxury service providers, property technology companies, and financial services firms seeking to establish meaningful business relationships with active agents.

Marketing professionals and B2B service companies benefit significantly from having verified email contacts for all licensed agents, enabling targeted campaigns for continuing education, professional services, and real estate technology solutions. Given the county's sophisticated market dynamics and high average transaction values, businesses that successfully connect with these agents often see substantial return on investment through sustained professional partnerships.

Current Property Listings

As of 2/17/2026, Sylvia Kos has 1 property for sale in Hinsdale and surrounding areas.

$2,999,000

Listed 2026-02-04

6 S Elm St
Hinsdale, IL  60521

Beds: 4.0
Baths: 5.5
Sq Ft: 4,340
Single Family Map
View Full Details

Current Property Rentals

Sylvia Kos currently has no rental properties available in Hinsdale and surrounding areas. Check back later.