Katherine O'Sullivan

Sunnyside NY

Welcome Home R E Sunnyside

60 Closed Sales

$38.2M Total Value

$295K - $1.6M Price Range

$635.9K Average Price

Prior 5 years

About Katherine

Katherine O’Sullivan "Katie" has been buying and selling her own Sunnyside properties throughout her many years in Sunnyside. Enjoying the process, she joined Welcome Home in 2016. She brings determination to all her deals drawing on her previous career as an Operations Director for international art business. Katherine joined the Welcome Home team with the hope of sharing my knowledge about Sunnyside and Woodside with others. Katie is a neighborhood expert; organized, efficient and ready for any challenge.

Home Types: Co-op, House, Townhouse, Condo, MultiFamily

Years of Experience: 10

Transaction History

1 Year
2 Year
5 Year

Seller Deals

Total Deals

Total Value

$6,035,500

Average Sale Price

$548,682

Price Range

$250K - $1.3M

Buyer Deals

Total Deals

Total Value

$2,575,000

Average Sale Price

$515,000

Price Range

$405K - $725K

1 Year View by Quarter

Seller Deals

Total Deals

Total Value

$7,285,500

Average Sale Price

$560,423

Price Range

$250K - $1.3M

Buyer Deals

Total Deals

Total Value

$6,816,000

Average Sale Price

$619,636

Price Range

$232K - $1.5M

2 Year View by Quarter

Seller Deals

Total Deals

Total Value

$18,794,500

Average Sale Price

$606,274

Price Range

$200K - $1.6M

Buyer Deals

Total Deals

Total Value

$19,361,500

Average Sale Price

$667,638

Price Range

$232K - $1.5M

5 Year View

Neighborhoods Katherine is Experienced In

Katherine's Active Listings

$349,000
- 1 Bed
- 1 Bath
- 700 Sq Ft
43-33 46th St

Unit A6

Long Island City, NY
Sunnyside Pre-War Bungalow-Style One Bedroom Co-op! Sunnyside Pre-War Bungalow-Style One Bedroom Co-op! Enjoy your own private entrance and stoop. This spacious one bedroom features large rooms and hardwood floors throughout. Enjoy the amenities of living in a co-op building but the feel of living in your own home with west-facing views to 46th Street and a very quick trip to the #7 subway at

Katherine O'Sullivan Welcome Home R E Sunnyside

$399,000
- 1 Bed
- 1 Bath
- 690 Sq Ft
39-30 52nd St

Unit 3B

Woodside, NY
TURN-KEY Sunny Hill One Bedroom with a view! This immaculate co-op has been tastefully renovated throughout. Enter into the extra large foyer with ample storage which then opens to a large west-facing living room. No expense has been spared on the galley kitchen which has marble countertops, a Bertazzoni stove with range hood, Liebherr refrigerator and a Bosch dishwasher, luxury white cabinetry

Katherine O'Sullivan Welcome Home R E Sunnyside

$365,000
- 1 Bed
- 1 Bath
- 700 Sq Ft
39-60 52nd St

Unit 6B

Woodside, NY
Top Floor Sunny Hill One bedroom! This bright apartment features a renovated kitchen with large kitchen island with stainless steel refrigerator, stove, over counter microwave and dishwasher. The open plan kitchen and living room combination offers ample space for entertaining. The corner bedroom has dual exposures and lots of light. The apartment has unique wall finishes and built-in book

Katherine O'Sullivan Welcome Home R E Sunnyside

$489,000
- 1 Bed
- 1 Bath
- 800 Sq Ft
41-08 43rd St

Unit 1D

Sunnyside, NY
Classic Pre-War Sunnyside One Bedroom Co-opWelcome to one of Sunnyside's most classic Pre-War layouts! This first floor corner unit has charming arches, original parquet pattern hardwood floors and a gracious layout with a spacious foyer and eat-in-kitchen. The sunny kitchen features a full size South facing window, honed black granite countertops, custom cabinetry and a full suite of

Katherine O'Sullivan Welcome Home R E Sunnyside

$260,000
- 1 Bath
- 500 Sq Ft
88-25 51st Ave

Unit 3E

Elmhurst, NY
COZY Renovated Sunny Hill Studio Apartment Move right in to this turn-key studio co-op in Sunny Hill! This apartment is complete with a well-appointed kitchen including room for a cafe table and fitted out with stainless appliances including a dishwasher, stove, microwave and refrigerator. The large studio space has room for both living and sleeping quarters, particularly with the addition of a

Katherine O'Sullivan Welcome Home R E Sunnyside

$360,000
- 1 Bed
- 1 Bath
- 600 Sq Ft
52-18 39th Ave

Unit 3C

Woodside, NY
BRIGHT & SUNNY Woodside One Bedroom Co-op located in 39th Avenue Apartments complex. This unit offers tranquil top floor living with south, north and west exposures. Box style rooms with lovely hardwood floors allow for ample space and flow throughout. The kitchen has a classic white subway tile backsplash and room for a cafe table next to a west facing window to enjoy the afternoon glow. There

Katherine O'Sullivan Welcome Home R E Sunnyside

$495,000
- 2 Beds
- 1 Bath
- 800 Sq Ft
39-20 52nd St

Unit 4D

Woodside, NY
INCREDIBLE OPPORTUNITY to own a Two Bedroom Sunny Hill Co-op with Manhattan Skyline views! Sun drenched move-in ready two bedroom features large living room with a black quartz breakfast bar area for easy entertaining between the kitchen and living room. The well appointed galley kitchen offers amenities such as: gas stove, microwave and French Door refrigerator. Refinished hardwood floors

Katherine O'Sullivan Welcome Home R E Sunnyside

Recently Sold

$375,000 Sold Feb 25, 2026
- 1 Bed
- 1 Bath
- 750 Sq Ft
39-60 54th St

Unit 2S

Woodside, NY
- 4% Below List
- $500/SF
- 23 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

$860,000 Sold Jan 15, 2026
- 3 Beds
- 2 Baths
- 1,520 Sq Ft
50-12 64th St

Flushing, NY
- 2% Below List
- $566/SF
- 30 Days On Market
- Current Est. Value $889K
Katherine O'Sullivan Welcome Home R E Sunnyside

$252,500 Sold Dec 17, 2025
- 1 Bath
- 450 Sq Ft
39-30 52nd St

Unit 6-E

Woodside, NY
- 1% Below List
- $561/SF
- 22 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

$575,000 Sold Oct 28, 2025
- 2 Beds
- 1 Bath
- 900 Sq Ft
39-60 52nd St

Unit 4F

Woodside, NY
- 15% Above List
- $639/SF
- 28 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

$579,000 Sold Sep 25, 2025
- 2 Beds
- 1 Bath
- 950 Sq Ft
43-42 45th St

Unit 3J

Sunnyside, NY
- $609/SF
- 39 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

$429,000 Sold Sep 10, 2025
- 1 Bed
- 1 Bath
- 650 Sq Ft
48- 17 39th Place

Unit 1

Sunnyside, NY
- $660/SF
- 24 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

$795,000 Sold Aug 11, 2025
- 2 Beds
- 2 Baths
- 1,150 Sq Ft
39-60 54th St

Unit 4G

Woodside, NY
- 6% Above List
- $691/SF
- 29 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

$250,000 Sold Aug 4, 2025
- 1 Bath
- 440 Sq Ft
50-05 43rd Ave

Unit 6C

Woodside, NY
- 4% Below List
- $568/SF
- 51 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

$310,000 Sold Jul 18, 2025
- 1 Bed
- 1 Bath
- 700 Sq Ft
39-30 52nd St

Unit GF

Woodside, NY
- 3% Below List
- $443/SF
- 81 Days On Market
Katherine O'Sullivan Welcome Home R E Sunnyside

Other Experience

First Time Home Buyers

Agent License: New York 10401285256

Katherine O'Sullivan

(929) 552-4228

Welcome Home R E Sunnyside

(929) 552-4228

Homes for Sale by City

Katherine O'Sullivan

About Katherine

Transaction History

Seller Deals

Buyer Deals

Production Over Time

1 Year View by Quarter

Seller Deals

Buyer Deals

Production Over Time

2 Year View by Quarter

Seller Deals

Buyer Deals

Production Over Time

5 Year View

Neighborhoods Katherine is Experienced In

Katherine's Listings and Deals

Katherine's Active Listings

Recently Sold

Other Experience