371 West 123rd Street (99 Morningside)

The building is twelve stories and 111 feet, in an R8A district that permits a mid-rise contextual envelope rather than a tower. The design answer is a stepped western face: each upper floor pulls back from the one below, and the setback becomes a private terrace with a park outlook. The glazing is floor-to-ceiling and set in a mix of stone and cast-concrete panels. The eastern and northern walls, which face the interior of the block and the holdout, are treated plainly.

Residences begin on the third floor. Floors three through ten hold two or three residences each, and two penthouses occupy the top. The published range runs from roughly 560 square feet at the one-bedroom end to about 2,300 square feet at the four-bedroom end, which is an unusually wide spread for a 23-unit building and produces a correspondingly wide price band. Interiors carry oak flooring, zoned central heating and cooling, Bosch kitchen and laundry appliances, and a washer and dryer in every home.

The floors below the residences hold the lobby and the community-facility unit. That the base is community facility rather than retail is worth stating plainly, because the two behave differently: a community facility does not turn over the way a retail tenancy does, and the condominium's relationship to it is set by the recorded declaration and schedule rather than by a lease cycle; review those documents.

99 Morningside runs a light staffing model appropriate to 23 residences: a part-time doorman with virtual-doorman coverage for the remaining hours, and a resident superintendent. The amenity program is a children's play room, a fitness room, bicycle storage and a furnished roof sun deck. Compare actual common charges, taxes, assessments and included services with identified Harlem condominiums; the staffing model alone does not establish lower or competitive costs.

A capital item's impact depends on scope, reserves and the declaration's allocation among residential and community-facility units. Any buyer should ask for the current operating budget, the reserve position, whether any assessment is live, and whether the sponsor retains unsold inventory. The first closings were in June 2021; compare the original budget with successive actual expenses and the current capital plan rather than assuming a five-year stabilization point.

Ownership form: Condominium. Purchases close through a board right of first refusal rather than a cooperative approval.

Pied-à-terre, subletting, LLC, trust and foreign ownership: Not documented; confirm in the declaration, bylaws and house rules. Minimum lease terms for subletting should be confirmed with the managing agent.

Pets: Not documented in public records. Confirm the house rules before contract.

Flip tax: Not documented in public records. Confirm any resale capital contribution with the managing agent.

Real estate taxes: The residential unit lots carry a fifteen-year 421-a exemption, Department of Finance code 5118, benefit start 2020, active on the FY2027 assessment roll and expiring after the 2034/35 tax year. Fifteen-year 421-a benefits are structured as a run of full exemption followed by a step-down in the final years; the exact year-by-year schedule for a specific unit should be read off the current tax bill rather than assumed. A small number of unit lots also carry individual owner-level exemptions, which do not transfer on a sale.

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 (2026 to date) cleared a median $1,103/sf (floor-adjusted) across 2 sales. 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 3.4% 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 1-01950-7502; 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.

Underwrite the abatement runway, not the current bill. The 421-a exemption expires after the 2034/35 tax year. Model the unabated number and the step-down years alongside today's bill; a buyer holding past the early 2030s will feel it.

Test the exposure before you fall for the address. The park view is real on the western lines and much less so elsewhere. The building wraps a brownstone, and some residences look into that notch.

Ignore the PLUTO year built. City data says 2016. The building finished in 2020 and closed its first units in 2021.

Understand the base. The ground-floor unit is a community facility, not retail. Ask what its hours and use are, and read the declaration's provisions on the non-residential unit's rights and common-charge share.

Ask about sponsor inventory and the reserve. Twenty-three units is a small denominator for any capital item. The current budget, reserve balance and assessment history are the documents that matter.

Lead with the park and the terrace. A private terrace with a western outlook over Morningside Park is a specific feature to document; views depend on floor and exposure, and no view is protected without a recorded instrument.

Get ahead of the abatement question. Sophisticated buyers will price the remaining runway themselves. Presenting the schedule and the projected unabated number up front, paired with a True Monthly Carrying Cost analysis, produces cleaner negotiations.

Price by line, not by building. With 23 residences across a 560-to-2,300-square-foot range and sharply different exposures, a building-average per-foot number will misprice most units in both directions.

Explain the holdout rather than avoiding it. It is a well-documented and widely photographed piece of the building's history. Buyers who learn about it in diligence react worse than buyers who hear it on the first showing.

If you're considering 99 Morningside, also evaluate:

• 88 Morningside Avenue — the 74-residence 2012 building a few blocks down the same avenue; the nearest peer by address and outlook, in a condop rather than condominium structure
• 117 West 123rd Street — 26-residence condominium on the same street to the east; the closest comparable by scale and vintage
• Circa Central Park (285 West 110th Street) — 49-residence 2016 ground-up condominium at the other end of the park frontage; the parkfront new-development alternative at a higher basis
• 301 West 118th Street — 91-residence Harlem condominium; the larger, fuller-service alternative
• 380 Lenox Avenue — the 2006 Lenox Avenue condominium; an earlier generation of Harlem new development and a useful basis check
• 100 West 119th Street — 25-residence 2005 conversion of a 1910 building; the loft-scale alternative with different tax and layout economics
• 3 West 122nd Street — 24-residence conversion of a circa-1900 building on Mount Morris Park; the prewar-conversion comparison
• 45 West 131st Street — 38-residence condominium north of 125th Street; the value-tier Harlem alternative
• 600 West 115th Street — the 1911 Gaetano Ajello building in Morningside Heights proper; the prewar cooperative-style alternative a few blocks southwest