34 Plaza Street East

Twelve stories of brick over a lot of 14,673 square feet, with roughly 116,000 square feet of residential area and about 4,000 square feet of commercial area on the Department of Finance rolls. The commercial component is worth flagging early: eight non-residential units sit on the tax roll alongside the 111 apartments, but those counts do not establish who owns the interests or what net income the cooperative receives. Review the ownership, leases, expenses and actual revenue before assigning a maintenance benefit or financing effect. Ask the managing agent what share of the budget, if any, the commercial space carries and whether the corporation has ever had to manage an IRC section 216 qualification question (the 80/20 income test, or its square-footage and expenditure alternatives).

Apartment plans here are mid-century rather than prewar: fewer defined foyers and service passages than a 1920s building on Eastern Parkway, more efficient kitchens, and a room-count convention that will read differently against the prewar stock across the plaza. The average of about 1,080 gross square feet per apartment sits between the boutique prewar buildings on the arc, which run much larger per unit, and the smaller-unit postwar stock elsewhere in the neighborhood. Within the building the spread is driven by line, floor and renovation state, and — more than in most buildings — by which direction the apartment faces.

Because the property is outside every historic district in the area, exterior alterations here go through the Department of Buildings alone. Window replacement, façade repair and any ironwork are board-and-DOB questions, not Landmarks questions. Against a converted brownstone inside the Park Slope or Prospect Heights district lines, that is a real difference in both cost and calendar, and it is one of the few places where an unlandmarked postwar building has a defensible advantage.

A twelve-story, 111-apartment cooperative is a full-service operating business. The recurring capital items to review are the elevators, the roof, the heating plant, the Local Law 11 façade cycle on a 1956 masonry envelope, and — in a building of this age — the risers and the electrical service, since mid-century apartment houses were designed for a fraction of today's electrical load. Ask for the last two façade filings, the elevator modernization history, the assessment history and the reserve balance.

The cooperative's Department of Housing Preservation and Development registration names Orsid New York as managing agent, current for the 2025–26 registration cycle. Staffing levels, service contracts and the doorman schedule should be confirmed with management rather than assumed from the building's size.

The underlying mortgage matters here in a different way than it does in a small corporation. Spread across 111 apartments, debt service per share is diluted, but a refinancing at an unfavorable moment still moves the maintenance for everyone. Get the balance, the rate and the maturity date in writing, and ask when the board last went to market.

The 1984 offering plan is not among the records reviewed for this page, and current policies must be checked against the operative offering plan and amendments, proprietary lease, bylaws and valid board rules. Rather than infer them from neighboring buildings, treat the following as the application-stage question list.

Subletting: Ask for the written policy, including any waiting period after purchase, term limits and sublet fee.

Flip tax or transfer fee: Not documented. A cooperative of this size and vintage may well have adopted one by amendment; get the current figure and the basis on which it is calculated.

Financing and minimum down payment: Not documented. Boards on the plaza rim vary, and the answer materially changes who can bid on your apartment when you sell.

Pets, pied-à-terre, washer-dryer and alteration rules: Not documented. Request the current house rules and the alteration agreement before you sign a contract, not after.

Landmarks: None applicable. Exterior work runs through the Department of Buildings.

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. $/sf is measured on the latest sales with reliable square footage (2025): a median $1,107/sf (recorded) across 2 sales. The building has traded as recently as 2026. Median listing discount 0.0% from the last ask.

Sales sourced from NYC Department of Finance recorded transfers (BBL 3-01170-0009). 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.

Confirm the exposure before anything else. The building runs back from the plaza rather than along it. Plaza-facing and block-facing apartments are different products at the same address. Visit at two times of day.

Ask what the commercial space contributes. Roughly 4,000 square feet of non-residential area sits on the tax roll. Find out what it earns, who occupies it, and whether it has ever raised an income-source question for the corporation.

Get the flip tax and sublet policy in writing early. Neither is documented in the public record. Both are material to your exit.

Understand the bulk position. Recorded gross floor area exceeds a simple comparison against R8X residential FAR; that comparison does not establish legal zoning floor area or permitted future work, so do not assume unused development rights without a zoning analysis.

Read the capital plan on a seventy-year-old building. Elevators, roof, façade cycle, heating plant and electrical service. Ask for the reserve balance and the assessment history alongside the financials.

Lead with the address and the arithmetic. Grand Army Plaza, twelve stories, 111 apartments, no Landmarks review on exterior work, and a maintenance line spread across an unusually wide share base. Those are the building's arguments and they are all verifiable.

Photograph the outlook honestly. If the apartment faces the plaza, that is the listing. If it does not, sell the light, the quiet and the room count instead — buyers find out either way at the first showing.

Position against the plaza rim and the parkway co-ops, not against the condominium tier. Contemporary condominium pricing in Prospect Heights is not the measure for a mid-century cooperative ask. A lender's appraiser uses co-op sales when they are available; condominium sales are a fallback that has to be explained and adjusted for the market's preference.

Have the board package ready before the first offer. Current financials, reserve balance, assessment history, house rules, sublet policy, flip tax and the alteration approvals for any work done to the unit. Sellers who assemble it in advance keep it from becoming a negotiating lever.

If you're considering 34 Plaza Street East, also evaluate:

• 50 Plaza Street East — the 1925 twelve-story cooperative on the same tax block; the closest direct comparison on the arc
• 20 Plaza Street East — the 1940 six-story cooperative that holds the curve of the plaza; the prewar alternative at low rise
• 10 Plaza Street East — the 1959 fifteen-story cooperative on the next block; the other postwar building on the rim
• 41 Eastern Parkway — the parkway's twelve-story prewar co-op, for buyers who want scale in a 1920s building
• 135 Eastern Parkway (Turner Towers) — the neighborhood's largest prewar cooperative
• 175 Eastern Parkway — 1920s parkway co-op at the Brooklyn Museum end, with an unusually wide apartment range
• 39 Plaza Street West — the Rosario Candela cooperative on the western arc; the plaza's prewar benchmark
• 230 Park Place — the Art Deco elevator co-op inside the Prospect Heights Historic District; the landmarked comparison
• 44 Butler Place (Butler Plaza) — the condominium alternative one block east, for buyers weighing tenure