Brownstone Guide · Home structure
Last updated: November 9, 2026 · By Katie Keate Johnson, Decode Real Estate
If you love a brownstone, you can own one three ways: a single-family house, a multi-family house, or a condo unit in a converted brownstone. Per square foot, a multi-family sells for about 21% less than a single-family, and a condo unit costs the most, because it is usually renovated top to bottom with new mechanicals. Condos are smaller, so the sale price is lower.
Jump to: Price per sq ft by neighborhood · Why the prices differ · The three-family house hack · Brownstone condos · The two condo layouts · FAQ
How do single-family, multi-family and condo prices compare in Brooklyn?
In every neighborhood I track, the condo unit is the most expensive way in per square foot and the multi-family is the least expensive. The gap between single-family and multi-family runs from almost nothing in Fort Greene to about a quarter in Crown Heights and Carroll Gardens.
| Neighborhood | Single-family $/sq ft | Multi-family $/sq ft | Condo unit $/sq ft | Multi-family discount |
|---|---|---|---|---|
| Brooklyn Heights | $1,746 | $1,343 | $1,993 | 23% |
| Carroll Gardens | $1,529 | $1,140 | $1,640 | 25% |
| Cobble Hill | $1,471 | $1,333 | $1,586 | 9% |
| Park Slope | $1,361 | $1,127 | $1,647 | 17% |
| Boerum Hill | $1,354 | $1,093 | $1,536 | 19% |
| Prospect Heights | $1,266 | $1,003 | $1,398 | 21% |
| Clinton Hill | $1,122 | $882 | $1,270 | 21% |
| Windsor Terrace | $1,070 | $833 | $1,154 | 22% |
| Fort Greene | $1,040 | $1,027 | $1,318 | 1% |
| Bedford-Stuyvesant | $775 | $692 | $1,130 | 11% |
| Crown Heights | $755 | $560 | $1,168 | 26% |
Source: REBNY closed sales 2023 to present, median price per square foot. Condo units are in prewar buildings with 6 or fewer units. Prospect Lefferts Gardens has almost no conversions on record, so it stays a house market.
Buying a renovated, move-in-ready single-family house carries the highest price per square foot of the two whole-house options. The premium for a condo reflects updated property: new finishes and mechanicals, and a home that is highly unlikely to need work soon.
Why does the same brownstone sell for more as condos?
Because the same square footage is worth more sold as separate homes. A developer who buys a multi-family house at multi-family prices, renovates it and sells it as three or four condos is selling each floor at condo prices. That spread is the reason so many brownstones on the market are conversions.
For a buyer, it means the choice is about trade-offs, not just budget. A single-family gives you the whole house and the garden. A multi-family costs less per square foot and comes with rental income, plus a landlord's responsibilities. A condo is the smallest check and the least work, with shared decisions and no say over the rest of the building.
What is the three-family house hack?
A three-family brownstone is usually an owner's duplex across the garden and parlor floors, with two rentals stacked above. Depending on the size of the house, each rental is likely a one- or two-bedroom, and together they can bring in roughly $5,000 to $11,000 a month.
A recent example: 284 7th Street in Park Slope sold for $3.7M in June 2025. Its two rentals bring in $6,680 a month, which covers about 35% of the mortgage principal and interest. What is left, about $13,175 a month, is close to the cost of owning a $2.35M condo, except you get a duplex with a garden.
It is also the answer to a question I get often: can I have a rental and keep the garden to myself? Only about 1% of Brooklyn townhouses put the rental on the top floor, so a three-family is usually the realistic way to do it. More on that in my floor plan analysis.
What does a brownstone condo cost in Brooklyn?
The median converted brownstone condo unit ranges from $1.04M in Bed-Stuy to $3.72M in Brooklyn Heights. Per square foot, a condo unit sells for 1.1 to 1.9 times what a whole house sells for in the same neighborhood, and the gap is widest where houses are least expensive: in Crown Heights a condo unit runs $1,168 per square foot, against $611 for a whole house.
| Neighborhood | Condo sales | Median price per condo unit |
|---|---|---|
| Brooklyn Heights | 14 | $3.72M |
| Cobble Hill | 23 | $2.44M |
| Park Slope | 92 | $2.09M |
| Carroll Gardens | 57 | $2.09M |
| Prospect Heights | 18 | $2.04M |
| Boerum Hill | 28 | $1.72M |
| Windsor Terrace | 18 | $1.49M |
| Crown Heights | 23 | $1.48M |
| Fort Greene | 11 | $1.31M |
| Clinton Hill | 23 | $1.26M |
| Bedford-Stuyvesant | 82 | $1.04M |
Source: REBNY closed sales, units in prewar buildings of 4 or fewer units, 2023 to 2025.
Conversions come in all sizes. Since 2023, about 19 two-unit buildings, about 50 three-unit, about 66 four-unit (the most common) and about 54 five-to-eight-unit buildings have sold as condos in these neighborhoods.
Why does every brownstone condo have the same floor plan?
The lot decides it. A typical Brooklyn townhouse is about 20 feet wide with 45 to 50 feet of building depth, 3 to 4 stories over a cellar, one stair, and party walls on both sides. That leaves two standard ways to cut it:
- The 4-unit stack. One unit per floor, plus a garden duplex that takes the cellar. Usually all two-bedrooms, with very low carrying costs. At 569 Saint Marks Ave in Crown Heights, bought in 2017 for $1.85M, four two-bedrooms closed in early 2026 for $6.30M in total, and one carries $387 a month in common charges plus $351 in taxes.
- The 2-unit split. A lower triplex with the garden and cellar, and an upper duplex with the roof. Townhouse scale, but each owner carries half the building. At 189 Prospect Place in Prospect Heights, a 20-foot house bought in 2021 for $3.2M sold in 2024 as two condos for $7.45M combined.
Plan on a walk-up either way. Before you fall for a unit, here is what I tell buyers:
- Read the width before the bedroom count. In an 8-foot-wide second bedroom, the bed goes against the wall.
- Ask which unit the cellar belongs to, and whether it is legal finished space.
- Price the carrying cost, not just the price. Small buildings mean low common charges, and also a small reserve fund.
- Read the offering plan and look up the sponsor's track record.
Frequently asked questions
What is a brownstone condo?
A brownstone condo is a single apartment in a townhouse that has been converted into separately owned units. Most Brooklyn conversions have two to four units, no elevator and very low common charges compared with new development buildings.
Is a multi-family brownstone cheaper than a single-family?
Per square foot, yes. Across 11 Brooklyn neighborhoods, multi-family townhouses sell for about 21% less per square foot than single-family houses, partly because a tenant in place or an extra kitchen changes how the house can be used.
How many units are in a converted brownstone?
Four is the most common. Of the small converted buildings that have sold since 2023, about 66 had four units, about 50 had three, about 19 had two, and about 54 had five to eight.
Do brownstone condos have elevators?
Almost never. A converted townhouse has one stair and party walls on both sides, so plan on a walk-up. The upper units trade stairs for light and, often, a roof deck.
Why do brownstone condos all have similar floor plans?
The lot decides it. A roughly 20-foot-wide house with 45 to 50 feet of building depth, 3 to 4 stories over a cellar and one stair can only be cut a couple of ways: a stack of floor-through units with a garden duplex, or a lower triplex and an upper duplex.
Get the full guide, or talk it through
Decoding the Brooklyn Brownstone is my 18-page data guide built from 2,451 townhouse sales in 12 neighborhoods. Request a copy and I will email it to you, or book a call and we can look at the houses you are considering.
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