10 Plaza Street East

The building is a fifteen-story postwar masonry apartment house on the plaza rim — a slab of its moment, without the setbacks, cornices, or terracotta of the prewar buildings on the western arc. Its architectural interest is positional rather than decorative: height and plaza frontage together produce the light and outlook that define the apartments.

Layouts run in the postwar Brooklyn idiom — studios, one-bedrooms, and two-bedroom, two-bath configurations, with L-shaped living rooms that carve out a dining area without giving up the sitting area, parquet floors, and window walls sized for view rather than for period proportion. Line position matters here more than it does in most brownstone-belt co-ops, because exposure determines whether an apartment looks at the park and the plaza, at Downtown Brooklyn, or into the block behind. Nobody buys this building for the plaster.

The unit count is the one number to handle carefully. The Department of Buildings record shows 126 dwelling units; DOF's tax-lot file returns 134. Neither is the share ledger, and in a building of this vintage combinations are common enough that a specific apartment's shares and any prior combination approvals should be verified by your attorney rather than inferred from either source.

Plaza Prospect Apartments, Inc. operates the building as a full-service cooperative. The documented service package — attended lobby, elevators, central laundry, bicycle room, resident storage, on-site parking — is the postwar standard and is the principal reason maintenance here runs heavier per room than at a self-managed brownstone conversion. That is the deal: you are buying staff and systems.

For a 1959 masonry building now well past sixty, the recurring capital items are predictable and should be diligenced specifically: FISP/Local Law 11 façade cycles, elevator modernization, roof and parapet work, window replacement, and the boiler and heating distribution plant. Ask for the last two FISP filings, the current reserve position, the assessment history, and the board's capital plan. The corporation's financial statements and the building's assessment record are maintained in The Roebling Research Library and reviewed with clients during diligence; the managing agent of record is not asserted here and should be confirmed with the board.

Purchase: Standard cooperative board approval — application package, financial disclosure, and interview. Build the longer cooperative timeline into your contract dates.

Financing and minimum down: Not publicly documented. Get the board's current standard in writing before making an offer; it is the single policy most likely to reprice a deal at the last minute.

Subletting: Not publicly documented. Confirm whether sublets are permitted at all, on what term, after what period of residency, and with what fee.

Pets: Cats and dogs are understood to be permitted; confirm any weight, breed, or registration conditions against the current house rules.

Flip tax, washer/dryer, pied-à-terre: Not publicly documented. These are board-set and change; management's current answers control.

Landmarks: None applicable. Exterior and window work runs through DOB.

Recent sales

Recent transfers at this building, from The Roebling Research Library. Prices are the transfer amounts recorded with the NYC Department of Finance; apartment-level detail is checked against the building’s own file in The Roebling Research Library before publishing.

Market read. Most recent trades (2026 to date) cleared a median $1,210/sf (floor-adjusted) across 1 sale. Floor-adjusted means each sale is restated to a constant mix of floors, so the figure can differ from the plain median of the sales listed above. Median listing discount -0.0% over ask.

Sales sourced from NYC Department of Finance recorded transfers (BBL 3-01169-0001). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage on co-ops is not officially recorded, figures shown are approximate.

Buy the floor and the exposure. This is a view building. The difference between a park-and-plaza outlook and a rear line is the difference between two different apartments at the same address, and it should be the first filter on your comparables.

Get the board's policies in writing early. Minimum down, sublet rules, pets, and flip tax are not publicly documented here. Ask before you bid; do not discover them at board package stage.

Reconcile the unit count and verify the shares. DOB says 126, DOF says 134. Neither is the share ledger. Have your attorney confirm the specific apartment's share allocation and any combination approvals.

Diligence the capital plan, not just the financials. A 1959 building carries a façade, elevator, roof, and boiler calendar. Ask for the last two FISP filings, the reserve balance, the assessment history, and the board's five-year plan.

Understand that you are outside the historic district. Window and exterior work here does not go through Landmarks — a real cost and calendar advantage over a comparable brownstone-belt co-op, and one worth stating out loud when you are comparing the two.

Lead with the outlook and the plaza. The park, the arch, the Central Library, the Botanic Garden, the Saturday greenmarket, and the 2/3 station are the daily-life case, and the view from an upper floor is the one thing the surrounding brownstone market cannot answer.

Price per room against the postwar plaza and Eastern Parkway set. The right comparables are the full-service postwar co-ops on the plaza rim and along Eastern Parkway — not the district's brownstone conversions and not new-construction condominiums, which price on a different basis entirely.

Frame the maintenance honestly as a service package. Buyers coming from the brownstone-belt co-op market will read the maintenance line as high until someone explains what it buys. Explain it: staff, elevators, laundry, parking, and a building that runs itself.

Have the building's paperwork ready. Financial statements, reserve position, assessment history, FISP status, and the board's current policies. In a cooperative sale, a clean, complete package is a pricing asset — it shortens diligence and removes the buyer's discount for uncertainty.

Be accurate about geography. The address sits on the Prospect Heights side of the plaza with Park Slope across the oval. Buyers search both; represent the location precisely and let the plaza do the work.

If you're considering 10 Plaza Street East, also evaluate:

• 20 Plaza Street East — the immediate neighbor on the same arc; the closest possible comparable on location and format
• 34 Plaza Street East — postwar plaza-rim cooperative peer a few doors along
• 50 Plaza Street East — smaller plaza-rim cooperative; the boutique alternative on the same street
• 39 Plaza Street West — Rosario Candela's Jazz Age cooperative on the western arc; the prewar answer to the same address
• 1 Grand Army Plaza (Richard Meier on Prospect Park) — the contemporary condominium on the plaza; different ownership form, same outlook
• 135 Eastern Parkway (Turner Towers) — large prewar full-service cooperative on the parkway; the scale comparable
• 125 Eastern Parkway (The Theodore Roosevelt) — parkway cooperative peer with a named prewar identity
• 175 Eastern Parkway — full-service parkway cooperative; the direct per-room comparable set
• 35 Prospect Park West — park-frontage cooperative on the Park Slope Gold Coast; the view comparable at a different price tier