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★★★★★
"Katherine is a very reliable agent. She is always very thorough in her responses to my inquiries - whether email, phone calls, or text messages. Katherine is punctual and very dependable when sending/receiving paperwork or meeting deadlines. She has knowledge about various neighborhoods throughout the city and very honest when communicating about listings." - Anonymous.

★★★★★
"Katherine was very knowledgeable of the market we were searching. She was patient and we didn't feel pressured. She helped us have an understanding of the market and the areas we were searching. I would recommend her to anyone looking to rent or buy." - A. Bachman.

Awards

2026 Philadelphia Style - Top Luxury Realtor
2026 Main Line Today Top Producers
2026 Philadelphia Magazine Top Producers
2026 Philadelphia Style - Best of Philly

2025 Philadelphia Style - Top Luxury Realtor
2025 Main Line Today Top Producers
2025 Philadelphia Style - Best of Philly
2025 Philadelphia Magazine Top Producers

2024 Philadelphia Style - Top Luxury Realtor
2024 Main Line Today Top Producers
2024 Philadelphia Magazine Top Producers
2024 Philadelphia Style - Best of Philly

2024 - Suburban Spotlight Award Winners by Real Producer

#39 In The Country (Volume) - The Wall Street Journal/Real Trends Top 1000
#42 in FL (Volume) - The Wall Street Journal/Real Trends Top 1000
Five Star Award Winner annually since 2013

Specialties

Buying and Listing Specialist, Relocation, First Time Home Buyers, Luxury, Move Up Buyers, and Downsizing Sellers. 

Education

Penn State University
Bachelor’s Degree in Advertising
About Katherine

Since beginning her real estate career in 2018, Katherine has built a reputation for delivering exceptional service, trusted guidance, and outstanding results. She has successfully represented buyers, sellers, and renters, facilitating millions of dollars in residential real estate transactions. Whether helping a first time homebuyer, marketing a home for sale, securing an investment property, or assisting with a relocation, Katherine combines market expertise, strategic negotiation, and personalized service to help her clients achieve their real estate goals with confidence.

Katherine intentionally takes a boutique approach to her business, choosing quality over quantity so every client receives the attention, accessibility, and strategic guidance they deserve. She believes the best real estate experiences are built on genuine relationships, thoughtful communication, and an unwavering commitment to understanding each client’s unique goals. Her clients never feel like another transaction. They feel supported, informed, and represented from the first conversation through closing and beyond.

A graduate of Penn State University with a degree in Communications, Katherine understands that every successful real estate transaction begins with clear, honest, and responsive communication. She works around her clients’ schedules, anticipates questions before they arise, and ensures every step of the buying, selling, or renting process is organized, transparent, and as seamless as possible. Her calm demeanor and proactive approach help clients feel confident, even in the most competitive or complex situations.

Known for her integrity, professionalism, and strong negotiation skills, Katherine is a dedicated advocate who works tirelessly to protect her clients’ best interests. She approaches every negotiation with preparation, strategy, and creativity, always focused on achieving the strongest possible outcome while maintaining professionalism and respect throughout the process.

Whether purchasing a first home, moving into a larger home, downsizing, investing, relocating, or preparing a property for the market, Katherine recognizes that every client and every transaction is different. She takes the time to understand each person’s priorities, lifestyle, timeline, and vision, then develops a customized strategy designed to deliver results that align with their goals.

For Katherine, real estate is about far more than buying and selling homes. It is about helping people navigate meaningful life transitions with confidence and clarity while providing trusted guidance every step of the way. She is committed to building lasting relationships, serving as a reliable resource long after the transaction is complete, and creating an experience that clients are proud to recommend to their family, friends, and colleagues.

Katherine proudly serves buyers, sellers, renters, and investors throughout Montgomery County, Bucks County, Chester County, Delaware County, Philadelphia, the Main Line, and surrounding communities in Southeastern Pennsylvania. Whether clients are searching for their first home, a luxury residence, an investment opportunity, or preparing to sell a property, she delivers local market expertise, strategic insight, and personalized representation designed to help them achieve exceptional results.

Katherine Bonnin’s Transactions

Past Sales
$735,000 | 674 Concord Road, Glen Mills, PA 19342

$735,000

5
Bedrooms
3,431
Square Feet
0.73
Acres
$650,000 | 3000 Foxx Lane, Philadelphia, PA 19144

$650,000

3
Bedrooms
2,176
Square Feet
0.22
Acres
$582,500 | 1287 Belmont Avenue, West Chester, PA 19380

$582,500

4
Bedrooms
1,559
Square Feet
0.44
Acres
$575,000 | 41 West Upsal Street, Philadelphia, PA 19119

$575,000

5
Bedrooms
3,175
Square Feet
0.13
Acres
$520,000 | 2650 East Huntingdon Street, Philadelphia, PA 19125

$520,000

3
Bedrooms
2,625
Square Feet
$445,000 | 131 Walnut Street, Jenkintown, PA 19046

$445,000

6
Bedrooms
2,521
Square Feet
0.16
Acres
$405,000 | 2131 East Harold Street, Philadelphia, PA 19125

$405,000

3
Bedrooms
2,000
Square Feet
0.01
Acres
a front view of a residential apartment building with a yard

$385,000

3
Bedrooms
1,920
Square Feet
0.03
Acres
$385,000 | 174 West Laurel Street, Philadelphia, PA 19123

$385,000

3
Bedrooms
1,172
Square Feet
0.01
Acres
$320,000 | 604 Benham Court, Newark, DE 19711

$320,000

3
Bedrooms
1,700
Square Feet
0.06
Acres
$279,900 | 1540 West York Street, Philadelphia, PA 19132

$279,900

1,500
Square Feet
0.02
Acres
$257,000 | 22 Cameo Place, Levittown, PA 19057

$257,000

5
Bedrooms
1,403
Square Feet
0.30
Acres
$250,000 | 9 Whitewood Drive, Levittown, PA 19057

$250,000

3
Bedrooms
1,278
Square Feet
0.17
Acres
$230,000 | 9 South Glen Avenue, Glenolden, PA 19036

$230,000

3
Bedrooms
1,512
Square Feet
0.18
Acres
$225,000 | 1140 Daly Street, Philadelphia, PA 19148

$225,000

3
Bedrooms
1,140
Square Feet
0.02
Acres
$225,000 | 1944 South Woodstock Street, Philadelphia, PA 19145

$225,000

3
Bedrooms
1,120
Square Feet
0.02
Acres
$223,000 | 4623 Almond Street, Philadelphia, PA 19137

$223,000

3
Bedrooms
1,425
Square Feet
0.04
Acres
$214,000 | 6100 Bustleton Ave | Philadelphia

$214,000

4
Bedrooms
1
Bathrooms

6100 Bustleton Ave

Philadelphia

Past Rentals
$2,495 | 2131 East Harold Street, Philadelphia, PA 19125

$2,495

3
Bedrooms
2,099
Square Feet
0.01
Acres
$2,350 | 930 North Bambrey Street, Philadelphia, PA 19130

$2,350

3
Bedrooms
2,373
Square Feet
0.02
Acres
$2,150 | 901 North Penn Street, Unit F808, Philadelphia, PA 19123

$2,150

1
Bedrooms
1,017
Square Feet
$1,850 | 111 South 15th Street, Unit 2109, Philadelphia, PA 19102

$1,850

1
Bedrooms
951
Square Feet
$1,250 | 2529 Frankford Avenue, Unit 1, Philadelphia, PA 19125

$1,250

1
Bedrooms
595
Square Feet
$1,200 | 2511 East Auburn Street, Philadelphia, PA 19134

$1,200

2
Bedrooms
654
Square Feet
0.01
Acres
$950 | 6100 Bustleton Avenue, Philadelphia, PA 19149

$950

2
Bedrooms
920
Square Feet