155 West 71st Street

One hundred feet of frontage, six stories, brick, on a 10,217-square-foot lot — 37,511 gross square feet in total. Dividing by the reported 54 residences gives about 695 gross square feet per residence, not an interior-area average. The reported resale mix includes studios, one-bedrooms, compact two-bedrooms and combinations; verify each layout independently of that ratio. Department of Buildings filings record apartment-level reconfiguration across the years — added bedrooms, relocated partitions, full gut renovations — which is the ordinary life of a small prewar condominium and means condition varies widely apartment to apartment.

Zoning is R8B, and recorded floor area works out to 3.67 times the lot area against a 4.00 residential FAR; that simple comparison does not establish legal zoning floor area or permitted future work, and the historic district would govern any attempt in any case. What the block gives instead is scale: six stories facing six-story neighbors, protected sightlines, and the light that comes with a hundred-foot frontage on a landmarked mid-block.

Apartments face the street or the rear yard. The rear backyard is a common amenity under the house rules, restricted to quiet recreation, with no smoking and no dogs.

Full-time staffing with a superintendent and building staff, a third-party managing agent, an elevator, a laundry room, rentable private storage, and garbage and recycling closets on each floor. Move-ins run weekdays between 9:00 a.m. and 4:00 p.m. with a certificate of insurance, an application, a security deposit and a moving fee.

The capital record in Department of Buildings filings is consistent: interior repairs after a fire and water event affecting several apartments in 2010, an oil-to-gas burner conversion at the boiler in 2014, exterior façade repairs filed in 2015 with a heavy-duty sidewalk shed, and a further façade repair filing in 2019. The 2015 borrowing and the façade project expense in the association's 2020 statements line up with that program. The building is six stories, which places it outside the Local Law 11 façade inspection cycle that governs taller buildings — the façade work here was undertaken on the association's own initiative rather than under a compliance mandate.

This is a condominium, so there is no co-op board admission: the board's remedy on a sale is a right of first refusal rather than an approval. Leasing is permitted with conditions; confirm those conditions and the rules for pieds-à-terre, LLC and trust purchasers and foreign buyers in the current declaration and bylaws.

Within that framework the house rules adopted in December 2017 are more specific than most, and buyers should read them:

Short-term rental is prohibited outright. No Airbnb or transient occupancy, and every lease must contain the building's no-smoking provision.

Pet dogs are limited to one per unit, and renters may not keep one absent a board grandfather. A $350 one-time pet registration fee applies, with veterinary and licensing documentation. Legally qualifying assistance animals must be considered under applicable disability-related reasonable accommodation rules, rather than treated as ordinary pets subject to the pet exclusion or pet fee.

Smoking is permitted in units but heavily conditioned. Owners who smoke must install a door gasket and purchase an air purifier; if odors still migrate, a window exhaust fan or air conditioner on exhaust; if that fails, smoking in the unit is barred. Non-compliance carries a $250 monthly penalty.

Eighty percent floor coverage is required outside kitchens, baths, closets and foyers, and the board may require additional acoustic measures.

Alterations require a signed alteration agreement and a certificate of insurance before work begins, with contractors carrying licenses and insurance the association deems necessary, and the unit owner responsible for contractor damage. Exterior alterations generally require LPC approval, with specified routine maintenance exemptions; identify the work scope and permit route.

General violations carry a $250 per day penalty at the board's discretion, escalating if unremedied.

Recent sales

Recent closings 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 (2024) cleared a median $1,326/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 2.4% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy.

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01143-7502; each condominium apartment is its own tax lot). 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 from recorded condo declarations and offering plans.

Address the concentration before you address anything else. Roughly 29 percent of the association's revenue comes from a single unit-owner entity. Ask your mortgage banker to run the project against the lender's owner-occupancy and single-entity concentration limits before you go to contract, not after. If the building is not warrantable for your lender, you want to know it in week one.

Verify the J-51 history and current bill. The identified grants began in 1986 and 1993; obtain the certificates to distinguish exemption and abatement terms and confirm expiration. Future bills can still change with assessments and rates. Model the true monthly with the True Monthly Carrying Cost Calculator.

Read the reserve position with the auditors' caveat attached. Roughly $392,000 segregated, funded at about 10 percent of operating expenses — but the required disclosure on future major repairs was omitted, and there is no published reserve study. Ask the managing agent what capital work is scheduled and whether any assessment is contemplated.

The debt story is good and worth confirming as current. The 2015 capital loan was retired in 2020, five years early. Confirm with the managing agent that no new borrowing has been taken since the most recent statements you are given.

If you intend to rent the apartment, read the rules first. Leasing is permitted, short-term rental is not, tenants ordinarily cannot keep a pet dog except under the stated grandfather provision, subject to legally required assistance-animal accommodations, and the lease must carry the no-smoking clause. Investors who skip this find out later.

Landmarks governs the exterior. Within the Upper West Side / Central Park West Historic District, window and other exterior alterations generally require LPC approval; some nonvisible work is also regulated, and specified routine maintenance is exempt.

Sell the block and the bones. A 1940 Felson Moderne building on a landmarked West 71st Street blockfront, one avenue off Central Park, is a specific proposition. Buyers who want prewar character with an elevator at this price point are a real and identifiable pool.

Get ahead of the lender question. The concentration disclosure is in the audited financials and a competent buyer's lender will find it. Have the current owner-occupancy figures and the association's questionnaire responses ready so a financed buyer does not stall.

Lead with the balance sheet. Debt retired in 2020, five years ahead of maturity; reserves segregated and funded on policy; no delinquent assessments in the most recent audited year on file.

Evaluate condition alongside floor, exposure and layout. Matched sales can help estimate the contribution of renovation without assuming it accounts for most of the value. Run the Renovation Cost Calculator before deciding whether to sell as-is.

If you're considering 155 West 71st Street, also evaluate:

• 119 West 71st Street — cooperative on the same landmarked blockfront, the closest like-for-like on location
• 235 West 71st Street (The Lucania) — prewar condominium a few blocks west, similar conversion profile
• 267 West 71st Street — small prewar cooperative on the same street
• 59 West 71st Street — cooperative closer to Central Park West, the prestige step-up on the same street
• 135 West 70th Street (The Pythian) — the landmark condominium conversion one block south
• 155 West 70th Street — condominium directly one block south, comparable scale
• 105 West 70th Street (The Brownstones) — cooperative alternative for buyers weighing tenure
• 120 West 72nd Street (Harsen House) — the new-construction condominium on the same tax block, at a materially higher price point
• 201 West 72nd Street (The Alexandria) — full-service condominium alternative a block north
• The Dorilton — the individual landmark at the block's western end, for context on the neighborhood's prewar top tier