121 Saint Marks Ave Brooklyn, NY 11217
Prospect Heights NeighborhoodEstimated payment $33,964/month
Highlights
- Green Building
- 3-minute walk to 7 Avenue (B,Q Line)
- Central Air
- P.S. 9 The Sarah Smith Garnet School Rated A
- Deck
- 3-minute walk to Dean Playground
About This Home
121 Saint Marks Avenue
On a picturesque, tree-lined block in the heart of Prospect Heights, 121 Saint Marks Avenue is a classic 21-foot-wide Brooklyn brownstone offering exceptional scale, flexibility, and opportunity.
Set on an extra-deep block, the home unfolds across approximately 4,000 square feet and is currently configured as an owner's triplex over a private one-bedroom garden apartment. Behind its handsome historic facade lies a residence defined by grand proportions, soaring ceilings, and the timeless character that makes Brooklyn townhouses so beloved.
The owner's triplex begins on the gracious parlor level, where tall windows fill the living room with natural light and original details speak to the home's historic charm. A formal dining room creates an elegant setting for entertaining, flowing naturally toward the kitchen and out to a deck overlooking the garden below. It is a floor designed equally for lively gatherings and quiet evenings at home.
Upstairs, the second and third floors offer a generous and flexible layout with multiple bedrooms and the potential for home offices, libraries, or creative spaces. The home's impressive 21-foot width allows each room to feel open and comfortable, a rarity even among Brooklyn townhouses.
Below, the garden level is configured as a one-bedroom apartment with its own entrance and direct access to the garden, ideal for rental income, guests, or conversion into a spectacular single-family residence.
The property will be delivered vacant, presenting a rare opportunity for the next owner to move right in, create a custom townhouse, or design the ideal live-plus-income configuration.
Just moments from the cafés and restaurants of Vanderbilt Avenue, the cultural energy of the Barclays Center district, and the green expanses of Prospect Park, the location offers the very best of Brooklyn living. Multiple subway lines nearby provide easy access to Manhattan and beyond.
Property Details
Home Type
- Multi-Family
Est. Annual Taxes
- $9,924
Year Built
- Built in 1910
Lot Details
- 3,092 Sq Ft Lot
- Lot Dimensions are 147.25x21.00
Home Design
- Entry on the 1st floor
Interior Spaces
- 3-Story Property
- Decorative Fireplace
- Basement
Bedrooms and Bathrooms
- 6 Bedrooms
Laundry
- Laundry in unit
- Washer Dryer Allowed
- Washer Hookup
Additional Features
- Green Building
- Deck
- Central Air
Community Details
- 3 Units
- Prospect Heights Subdivision
Listing and Financial Details
- Legal Lot and Block 0068 / 01143
Map
Home Values in the Area
Average Home Value in this Area
Tax History
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2026 | $10,046 | $212,340 | $55,080 | $157,260 |
| 2025 | $9,931 | $221,220 | $55,080 | $166,140 |
| 2024 | $9,931 | $211,500 | $55,080 | $156,420 |
| 2023 | $9,489 | $255,960 | $55,080 | $200,880 |
| 2022 | $8,812 | $222,540 | $55,080 | $167,460 |
| 2021 | $8,777 | $242,580 | $55,080 | $187,500 |
| 2019 | $8,620 | $213,540 | $55,080 | $158,460 |
| 2018 | $7,639 | $38,934 | $8,818 | $30,116 |
| 2017 | $7,199 | $36,784 | $7,875 | $28,909 |
| 2016 | $6,638 | $34,754 | $8,413 | $26,341 |
| 2015 | $3,966 | $34,735 | $12,142 | $22,593 |
| 2014 | $3,966 | $34,338 | $14,402 | $19,936 |
Property History
| Date | Event | Price | List to Sale | Price per Sq Ft |
|---|---|---|---|---|
| 04/21/2026 04/21/26 | Pending | -- | -- | -- |
| 04/21/2026 04/21/26 | For Sale | $6,250,000 | -- | -- |
Purchase History
| Date | Type | Sale Price | Title Company |
|---|---|---|---|
| Deed | -- | -- | |
| Deed | -- | -- | |
| Deed | $417,000 | -- | |
| Deed | $417,000 | -- |
Source: Real Estate Board of New York (REBNY)
MLS Number: RLS20085734
APN: 01143-0068
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Ask me questions while you tour the home.