323 PROSPECT Avenue
$2,350,000
MLS# RLS20117153 · Park Slope
Listed September 24, 2026 · 42 days on the market
4 Beds 3 Baths
About This Property
323 Prospect Avenue
Built in 1901
Two-Family Row House
Lot: 18.42ft x 80ft
Building: 18.42 x 30ft (plus extension on garden level)
Set among South Slope's characteristic rowhouses, 323 Prospect Avenue is a lovely two-family house that allows incredible flexibility of use. Currently configured as a lower 2-bedroom, 2-bathroom duplex with basement and a private backyard and an upper 2-bedroom, 1-bathroom duplex, this charming home could easily be converted into a spacious single-family residence.
The lower duplex was extensively renovated by the current owners, creating a warm and inviting home that blends thoughtful updates with original character. The kitchen features custom cabinetry and beautiful Italian Pietra Cardoso stone island and countertops. A custom-built bookshelf in the living room cleverly converts into a functional workspace. Original brick walls and fireplaces, together with beautiful cherry floors, add warmth and texture throughout. The rear of the property houses the sun-filled primary bedroom with en-suite bath, overlooking the peaceful backyard which has been lovingly cultivated as an organic garden for many years. Filled with mature plantings and flowers such as a native serviceberry, lilacs, roses and daffodils, and blessed with abundant sunlight and privacy, the garden is a true sanctuary in the city.
The upper duplex retains the charm and character of the original house, with exposed brick walls and original tin ceilings. With two bedrooms, a full bathroom, and flexible layout spread across two floors, the apartment offers a wonderful sense of separation and privacy. Together, the two apartments create a flexible home that can accommodate a variety of living arrangements and evolve over time.
Ideally located close to Prospect Park, the R train at Prospect Ave and the F/G trains at 7th Ave station, 323 Prospect Avenue offers the best of Brooklyn living within the vibrant neighborhoods of South Slope and Greenwood Heights. This special home is surrounded by the restaurants, cafés, shops, and everyday conveniences that make Park Slope so desirable, such as Giuseppina's, Folk, Buttermilk Bar and many more.
Agent's Note
From Curtis Bain. Details about the apartment are drawn from the listing information provided through RLS by Brown Harris Stevens Brooklyn LLC.
The kitchen's island and countertops are Italian Pietra Cardoso stone, set into custom cabinetry in the lower duplex of this 1901 two-family row house. The house measures 42 feet by 80 feet, and the lower duplex has two bedrooms, two bathrooms, a basement and a private backyard. The upper duplex has two bedrooms and one full bathroom across two floors.
Original brick walls and fireplaces run through the house, with cherry floors underfoot. Upstairs, the original tin ceilings are still there. A custom bookshelf in the living room converts into a workspace, which is a practical use of wall space I'd want in any home.
Because the two apartments are separate, you get real separation between floors. The listing notes the house could also be converted to a single family residence, so the layout can change as your needs do.
The primary bedroom sits at the rear with an en-suite bath and overlooks the backyard. That garden has been cultivated as an organic garden for many years, with a native serviceberry, lilacs, roses and daffodils. The home also has a terrace and private outdoor space over 60 square feet, along with a place to sit outside.
The washer and dryer are in the unit, and the home has storage and a decorative fireplace. The building is listed as a green building, pets are allowed, and it's smoke-free. The R train at Prospect Av is about 9 minutes on foot, and the F and G at 7 Av are about 12 minutes away. Prospect Park is about 11 minutes on foot.
Quick answers+
Does the house have in-unit laundry?
Yes. There's a washer and dryer in the unit.
Is there private outdoor space?
Yes. The home has a private garden, a terrace, and private outdoor space over 60 square feet.
How many bedrooms and bathrooms does the house have?
Four bedrooms and three bathrooms in total. The lower duplex has two bedrooms and two bathrooms, and the upper duplex has two bedrooms and one bathroom.
Curtis Bain
Brown Harris Stevens
Property Features
Policies
- Pets allowed
- Smoke-free
Home features
- Washer/dryer in unit
- Decorative fireplace
- High ceilings
- Storage
- Private garden
- Private outdoor space (over 60 sq ft)
- Terrace
Building amenities
Services and facilities
- Green building
Estimate
Monthly Cost & Closing Costs
The rate is a placeholder, not a quote. Enter the one your lender gives you.
$12,580 / month
- Principal and interest$11,883
- Property taxes$697
Due at closing
- Down payment (20%)$470,000
- NYS “mansion tax” (1.25%)$29,375
- Mortgage recording tax (1.925%)$36,190
Not included: attorney, title insurance, lender and appraisal fees, board application and move-in fees, flip tax and prepaid items. Estimates only, based on the published New York State rates. Your attorney and lender will confirm the real figures.
Location & Nearby
Map
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323 PROSPECT Avenue
Subway
- RProspect AvAbout 9 min walk
- FG15 St-Prospect ParkAbout 12 min walk
- FG7 AvAbout 12 min walk · Accessible
Parks
- Detective Joseph Mayrose ParkAbout 1 min walk
- Prospect ParkAbout 11 min walk
- ParkAbout 13 min walk
Public schools · Elementary schools
- P.S. 295About 3 min walk
- Magnet School of Math, Science and Design TechnologyAbout 4 min walk
- Hellenic Classical Charter School · CharterAbout 6 min walk
Middle schools
- New Voices School of Academic & Creative ArtsAbout 3 min walk
- J.H.S. 88 Peter RougetAbout 4 min walk
High schools
- Park Slope CollegiateAbout 17 min walk
- Millennium Brooklyn HSAbout 17 min walk
Walking times are estimates. Schools shown are the nearest public and charter schools and are not zone assignments; a nearby school is not necessarily the one an address is zoned for. Confirm zoning with the NYC Department of Education. Sources: MTA, NYC Parks and NYC Department of City Planning open data.
The Neighborhood
About Park Slope
Brooklyn's premier brownstone neighborhood offering architectural grandeur, top schools, and Prospect Park living.
Walkability
9/10
Public transit
8/10
Schools
10/10
Dining
9/10
Groceries & parks
10/10
Schools in Park Slope
Multiple acclaimed private and public schools combined with strong parent demand make this one of Brooklyn's top education neighborhoods. Nearby Brooklyn Heights adds access to Packer Collegiate and St. Ann's.
Private schools in the area include Berkeley Carroll School, Packer Collegiate Institute, St. Ann's School, Poly Prep Country Day School, Brooklyn Friends School, Saint Saviour Catholic Academy.
Gallery
Property Photos
Listing Courtesy of Brown Harris Stevens Brooklyn LLC
This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., All rights reserved.