40 Prospect Park West

Six stories of brick on a 13,900-square-foot lot with 100 feet of park frontage, holding roughly 67,100 square feet — a built FAR near 4.8 where 6.02 is permitted. The main entrance faces Prospect Park West; the service entrance is on Garfield Place and is the required route for every move and every large delivery.

The apartment mix is the thing to understand. Eight of the nine lines are one-bedrooms; only the A line is a two-bedroom. Across roughly 60 to 62 units and 38,170 shares, that produces a building with a narrow product range and, as a result, a comparatively tight price band — the intra-building spread here runs on floor, exposure and renovation state rather than on configuration. The premium is the park: front-line apartments look across the avenue into Prospect Park, and rear-line apartments look into the block. Establish which line an apartment is on before you form a view of its value.

Because the building was constructed in 1942 to prewar standards but on a modest program, expect the finishes and systems of a late prewar building rather than a 1920s one — plaster, a cellar heating plant, a compactor chute on each floor, one passenger elevator and no freight car. A documented alteration on the property dates to 2019; establish what that work was and how it was funded.

40 Prospect Park West Owners Corp. has run the building since the July 1985 closing. The corporation's audited financial statements show the operating shape clearly: real estate taxes and payroll are the two dominant lines, with a small staff, an elevator and compactor maintenance contract, and modest laundry income. There is no commercial rent and no garage to lean on.

The corporation refinanced on December 28, 2006, replacing a $750,000 Independence Savings Bank mortgage taken in October 1998 at 6.75 percent with a $1,000,000 loan from National Cooperative Bank at 5.45 percent, amortized over thirty years with a balloon payment scheduled for January 1, 2017. Reserve funds stood at $616,709 at the end of 2006, materially higher than a year earlier after a large appropriation. In the same period the board implemented a maintenance increase of about 4 percent effective January 2006 and 7.75 percent effective January 2007, and ran two concurrent assessments through 2006 — a heat assessment equivalent to a 3 percent increase, and an assessment of roughly $0.35 per share for required foundation repairs.

Those are two-decade-old figures and they are useful for pattern rather than for underwriting. The pattern is a board that funds capital work through assessment rather than deferral, and a corporation that has refinanced roughly once a decade. Ask for the current mortgage terms and maturity, the current reserve balance, the last FISP/Local Law 11 filing, the elevator's modernization history, and what the 2019 alteration on the property record was. The corporation has historically not conducted a study of the remaining useful lives of common components, so the board's own capital plan is the document that matters.

The dated materials on file cover sublet, occupancy, pet, smoking and move rules; get the current versions from the managing agent before contract. Three further items belong in a buyer's file.

Alterations: Detailed plans must go to the board before any demolition, wall construction, plumbing, bathroom, kitchen or electrical work; licensed tradespeople only; full code compliance; floors 80 percent covered.

Insurance and repairs: The house rules divide responsibility explicitly — the corporation covers repairs to water and electrical apparatus inside the walls up to and including plaster or sheetrock, expressly excluding repainting and retiling; everything inside the apartment, including exposed plumbing, fixtures, radiators and electrical, is the shareholder's.

Flip tax, financing ceiling and pied-à-terre policy: Not documented in the materials on file. Confirm each against the current purchase application before you write an offer.

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 (2022): a median $1,073/sf (floor-adjusted) across 1 sale. 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 3-01075-0035). 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.

Read the sublet rules first. Two years maximum, extraordinary circumstances only, one year of prior occupancy required, and a board that has already once terminated every existing sublet in the building. This is an owner-occupancy cooperative and it means it.

Establish which line you are buying. Eight one-bedroom lines and one two-bedroom line. Front lines face the park; rear lines do not. Nothing else in the building moves value as much.

Ask what the sponsor still holds. Park West Realty Co. held nine apartments as recently as 2007 under a one-per-year sell-down agreement. Confirm what remains and how it is occupied.

Get current debt and reserve figures. The last documented refinancing carried a 2017 balloon. Ask what replaced it, at what rate, with what maturity, and what the reserve balance is today.

Note what the historic district exclusion does and does not give you. No Landmarks review on the building's own exterior work — and no Landmarks protection over the building either. The block behind it is protected; this corner is not.

Plan the move around the rules. Weekdays only, Garfield Place service entrance, $500 deposits from both sides, and no share transfer until both are received.

Lead with the park and the price of entry. This is Prospect Park West frontage at a one-bedroom cost basis. Photograph the view from the actual apartment and state the line.

Screen buyers for the sublet rule early. Investors and pied-à-terre buyers will not clear this board. Finding that out before the board package saves a month.

If you are selling an A-line apartment, market its scarcity. One two-bedroom line in a sixty-unit building is genuinely thin inventory on this avenue.

Reconcile the unit count and shares in advance. The Department of Finance says 62; the plan says 60 plus a professional unit; the financials say 60. Have the share allocation and the corporate record ready for the buyer's attorney.

Assemble the capital and debt file. No reserve study, an assessment history that includes foundation work, and a documented 2019 alteration. A seller who can hand that over shortens the transaction materially.

If you're considering 40 Prospect Park West, also evaluate:

• 35 Prospect Park West — Emery Roth's 1929 cooperative directly across Garfield Place; the same view at several times the apartment scale, also outside the historic district
• 1 Prospect Park West — the 2019 condominium conversion at Grand Army Plaza; condominium flexibility on the same avenue
• 220 Berkeley Place — 1955 postwar co-op inside the district; comparable scale, different plan logic
• 814 Carroll Street — 1950 co-op a few blocks north; the postwar alternative
• 20 Plaza Street East — 1940 co-op on Grand Army Plaza; the same building cycle with more service
• 140 8th Avenue — the 1936 Art Deco co-op at Carroll Street
• 235 Lincoln Place — Charles Kreymborg's 1937 neo-Federal co-op inside the district
• 420 12th Street — co-op in the South Slope; a lower-cost basis further from the park
• 343 4th Avenue — the 2006 Fourth Avenue condominium; condo ownership in the same neighborhood