66 Leonard Street

Hardenbergh's design is a textbook Beaux-Arts loft: a rusticated masonry base, a tall mid-section organized by repeating arched bays, and crisp limestone detailing that has been preserved under the historic-district designation. The 1999 conversion added a penthouse level set back from the protected street wall, a common and well-handled move on landmark loft buildings of this vintage.

Inside, the residences are loft-scaled — open layouts, oversized windows, and the high ceilings characteristic of early-1900s manufacturing floors. Floor plates that once held looms and bolts of cloth now translate into generous living space, with the larger homes reading as full or near-full-floor lofts. The mix runs from spacious one- and two-bedroom layouts to the larger upper-floor and penthouse residences, each carrying the volume, column lines, and light that distinguish a real conversion from new construction styled to look like one.

For a 46-unit building, the service and amenity package is unusually complete. There is a 24-hour concierge and a resident superintendent, an on-site attended parking garage — a genuine rarity downtown — a fitness center, a bicycle room, a rooftop terrace with a children's play area, and a landscaped ground-floor garden. As a condominium, the building offers the financing latitude and ownership flexibility its structure implies: purchases clear through a right-of-first-refusal rather than a co-op board, and pied-à-terre, trust, and investment ownership are customary at buildings of this profile. The building is pet-friendly.

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 $2,301/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 2.7% 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 1-00173-7501; 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.

The case for buying here is architectural and structural at once. You are buying a Hardenbergh-designed, landmark-protected loft — provenance that cannot be replicated in new construction. You are buying condominium tenure — a right-of-first-refusal rather than a co-op board interview, with financing, leasing and ownership-entity rules to confirm in the declaration and bylaws. And you are buying scale — the floor plates and ceiling heights of a real conversion.

Diligence on a loft conversion of this vintage rewards attention to the specifics: the layout and light of the individual home, the condition and capacity of building systems updated at conversion, and the reserve and capital posture of a small association. The on-site garage and full amenity suite are meaningful differentiators for a building this size, and they shape both carrying costs and resale appeal.

Lead with the pedigree. A Hardenbergh façade, a landmark designation, and a clean 1999 conversion are durable selling points that separate this building from the broader Tribeca loft field. The architecture is the headline.

Benchmark to Tribeca's converted-loft tier, not to new-construction condominiums. The right comparison set is the neighborhood's premier masonry and cast-iron conversions, where buyers pay for volume, light, and provenance.

The amenity package is a closing argument. An attended on-site garage, full-time concierge, fitness center, and roof terrace are scarce at 46-unit downtown buildings — emphasize them.

If you're considering 66 Leonard Street, also evaluate Tribeca's other landmark and loft-scaled condominiums:

• 56 Leonard Street — the Herzog & de Meuron tower a block away
• 91 Leonard Street — newer Tribeca condominium on the same street
• 108 Leonard Street — landmark conversion nearby
• 155 Franklin Street — boutique Tribeca loft building
• 44 Laight Street — converted Tribeca loft condominium
• 70 Vestry Street — waterfront Tribeca condominium