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Katelyn E Sullivan

Katelyn E Sullivan
Real Estate Agent (Salesperson)
Boston MA

Salesperson (MA: 9570125)

6 years experience

REALTOR® 1 Active Listings Serves Suffolk County, MA
View on Realtor.com

Contact Information

Brokerage
Coldwell Banker Realty

Office Website
Office Address
138 Horace St
Boston, MA  02128-4236
(Suffolk County)
Office Phone
617-266-4430
Office Fax
Mobile
617-266-4430
Email
kate************@********.com
Show Email for $5

Service Areas

Framingham: MA Natick: MA Ashland: MA Marlborough: MA Southborough: MA Fayville: MA South Boston: MA Boston: MA East Boston: MA Winthrop Town: MA Revere: MA Saugus: MA

About Katelyn Sullivan

REALTOR® Katelyn E Sullivan with Coldwell Banker Realty ~ is a 3rd generation REALTOR® and a Massachusetts native
Katelyn is a current Boston resident and is originally from Framingham Having grown up in Metrowest and having lived in Boston the last several years Katelyn serves both Boston & the ‘burbs for her client’s real estate needs Katelyn currently ranks as the "International President's Circle:" ranking in the top 5% of Coldwell Banker Realty agents globally In 2022 she received the international 30 Under 30 award Katelyn loves her career in real estate she feels as though she’s a born realtor given her grandmother worked in real estate in the 60s & 70s and Katelyn's mother Diane B Sullivan has been a Metrowest real estate powerhouse since 1985 Katelyn learned from the best as Diane’s been a top producer for decades Katelyn is out of the Coldwell Banker Boston Back Bay office and has sold over 30 million in real estate since 2020 Katelyn has helped over 50 first time buyers purchase homes in Massachusetts despite the difficult buyer’s market in recent years Katelyn holds annual first time buyer webinars as well as in-person homebuying events in both English and Spanish Katelyn picked up Spanish in school and after college lived in Latin America to continue her Spanish language education Katelyn’s worked for both buyers and sellers speaking Spanish Katelyn enjoys helping sellers prepare their home to list in order to get top dollar on their investment Katelyn’s creativity energetic soul and innate grit are all traits that are evident in her delivery Katelyn delivers a “white glove experience” to all of her sellers and buyers as a realtor in the Boston area In addition to real estate Katelyn is involved with her local community Now a resident of East Boston she founded Eastie Gals: a group for Meet Ups and creating connection amongst women nearby She’s also heavily involved in the Junior League of Boston and the Greater Boston Chapter of the Penn State Alumni Association Through her various community groups she does volunteer opportunities philanthropy activities and more Katelyn is a well rounded person and realtor she cares for her clients special wants and needs and strives to be a realtor for life to each of her clients

Suffolk County, MA Real Estate Market Analysis (Single Family Homes)

$2,140,086
Avg. Listing Price
From Katelyn's portfolio
4.0 / 2.8
Avg. Beds/Baths
Typical property size
2,555 sf
Avg. Square Footage
Interior living space
195
Active Listings
Current inventory

Suffolk County, Massachusetts represents one of the most dynamic and concentrated real estate markets in New England, encompassing Boston and its immediate urban core. With 2,610 total actively licensed agents serving this compact but incredibly valuable market, the county demonstrates remarkable agent density that reflects both the complexity of urban real estate transactions and the high stakes involved in Boston's property market.

What makes Suffolk County particularly fascinating is how these 2,610 agents with email connectivity operate within just 59 square miles, creating one of the highest concentrations of real estate professionals per square mile in the United States. This density speaks to the sophisticated nature of transactions here, where agents must navigate everything from historic brownstone renovations in Back Bay to luxury high-rise developments in the Seaport District.

Major Suffolk County, Massachusetts Real Estate Markets

Boston dominates Suffolk County's real estate landscape, but the market breaks down into distinct neighborhoods that function almost like separate cities. Downtown Boston, Back Bay, and Beacon Hill represent the premium historic markets, while emerging areas like the Innovation District and East Boston offer newer development opportunities. Revere, Winthrop, and Chelsea provide more affordable options while still maintaining proximity to Boston's employment centers.

The Harbor Islands and waterfront properties create unique market segments that require specialized knowledge, while the student housing market around institutions like Suffolk University adds another layer of complexity. Each micro-market demands agents who understand specific zoning regulations, historic preservation requirements, and neighborhood dynamics that can dramatically affect property values within just a few blocks.

Market Dynamics and Geographic Complexity

Suffolk County's real estate market operates with unusual intensity due to severe land constraints and overwhelming demand pressure. The county's small geographic footprint means that any new development significantly impacts surrounding property values, creating ripple effects that experienced agents must anticipate. Transit accessibility, particularly proximity to MBTA lines, can create price premiums of 20-30% within the same neighborhood.

Seasonal patterns here differ from typical suburban markets, with peak activity extending later into fall due to the academic calendar and corporate relocation cycles. The presence of major hospitals, universities, and financial institutions creates steady demand for both residential and commercial properties, but also means agents must understand complex timing around academic years, medical residency programs, and corporate fiscal calendars.

Why Businesses Need Suffolk County, Massachusetts Agent Contact Data

The concentrated nature of Suffolk County's agent network makes it incredibly valuable for businesses targeting real estate professionals. These 2,610 agents with email addresses represent decision-makers handling some of the highest-value transactions in New England, making them prime prospects for financial services, home improvement companies, and technology solutions. The urban focus means these agents are typically more receptive to digital solutions and innovative services that can streamline complex city transactions.

Companies offering everything from mortgage services to smart home technology find Suffolk County agents particularly valuable because they influence affluent, tech-savvy clients who expect cutting-edge solutions. The high transaction velocity in this market means agents are constantly seeking tools and services that provide competitive advantages, creating opportunities for businesses that can demonstrate clear value propositions tailored to urban real estate challenges.

Current Property Listings

As of 2/15/2026, Katelyn Sullivan has 1 property for sale in Boston and surrounding areas.

$419,900

Listed 2026-01-22

6 Cypress Rd Apt 606
Boston, MA  02135

Beds: 1.0
Baths: 1.0
Sq Ft: 594
Condos Map
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Current Property Rentals

As of 2/17/2026, Katelyn Sullivan has the following rental property available in Boston and surrounding areas.

$2,500

Listed 2025-10-29

87 Winthrop St Apt 3
Framingham, MA  01702

Beds: 2.0
Baths: 1.0
Sq Ft: 1,000
Lot: 14,985 sf
Condos Map
View Full Details

$3,750

Listed 2026-01-21

40 Seaview Ave Unit 1
Winthrop, MA  02152

Beds: 3.0
Baths: 2.5
Sq Ft: 1,381
Lot: 6,098 sf
Condos Map
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$2,800

Listed 2025-12-19

44 W Eagle St Apt 1
Boston, MA  02128

Beds: 2.0
Baths: 2.0
Sq Ft: 722
Apartment Map
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$3,950

Listed 2025-11-05

57 Bellingham Ave Unit 2
Revere, MA  02151

Beds: 3.0
Baths: 2.0
Sq Ft: 1,490
Condos Map
View Full Details