175–177 East 77th Street (177 East 77th Street Condominium)

The building rises 11 stories plus a penthouse level in sandy-beige brick, with Boak & Paris's streamlined vocabulary concentrated at the entrance: a one-story limestone surround with incised geometric ornament, flush lanterns, and a canopy, beneath a small limestone plaque at the second floor. The recessed central bays carry the firm's signature 45-degree chamfered corner windows — a device the architects had used for the same developers at 160 East 89th Street — and the facade is otherwise unornamented, which is the Art Moderne point. The original steel casement windows, important to the design, were replaced in later cycles per architectural histories.

Inside, the 57 condominium units descend from the original 52-apartment layout of three- and four-room suites — today predominantly one- and two-bedroom homes with a number of combinations — and the terrace-per-apartment program means private outdoor space appears throughout the building rather than only on premium lines. Corner exposures, balconies, and renovation quality drive the spread between lines; the 2004 conversion updated building systems and windows, and unit interiors range from conversion-era finishes to full gut renovations.

A boutique, service-led condominium: doorman and concierge coverage, roof deck, and storage per brokerage records, with no large amenity program — buyers comparing against newer Upper East Side condos should weigh location, outdoor space, and condo mechanics against amenity-floor breadth. The Lexington Avenue local at 77th Street is half a block west; Lenox Hill Hospital is a block away, which buyers should evaluate in person for siren tolerance on the Lexington side of the block. The condominium's governing documents and financials are obtained per-transaction; The Roebling Team reviews them with clients during diligence.

Recent sales

Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01412-7503) and verified listing data. Apartment-level facts (line, condition, asking-price context) curated and cross-verified by The Roebling Team research desk. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price.

The condo structure is the asset. Pre-1945 construction with condominium transfer mechanics is genuinely scarce in Lenox Hill. For buyers structuring through trusts or LLCs, pied-à-terre buyers, and parents buying for children, this building permits what the surrounding co-op inventory complicates — confirm specific structures against the condominium documents with your attorney.

Price the outdoor space line by line. The terrace-per-apartment heritage means outdoor space is common here, but size, exposure, and the difference between a true terrace and a Juliet-scale balcony vary significantly. East-facing terraces above the two-story Third Avenue neighbor carry open light; verify the exposure's permanence posture with your attorney rather than assuming it.

Address both house numbers in your search. Listings and records appear under both 175 and 177 East 77th Street. Run comparables under both addresses or you will miss half the building's history.

Verify the policy stack directly. Pet rules, leasing limits, transfer fees, and alteration requirements are thinly documented publicly. We obtain the current condominium documents from the managing agent during diligence.

Mansion tax planning applies at the building's price points. Run the Mansion Tax Calculator at the intended offer before negotiating — the $1 million and $2 million thresholds both bite in this building's range.

Market the architecture and the mechanics together. Boak & Paris, 1941, bolted-steel innovation covered by The New York Times, a terrace on the line, and condo transfer flexibility in a co-op neighborhood — that is a specific, verifiable story, and the buyer pool for it includes purchasers the co-ops across the street cannot serve.

Position against both alternatives. Your buyer is cross-shopping Lenox Hill co-ops (cheaper per foot, harder to buy) and the new Third Avenue condos (newer amenities, materially higher pricing). The relative-value pitch is the middle: character, outdoor space, and flexibility without new-development pricing.

Condition transparency wins in a 57-unit building. Same-line comparables are thin; the spread between conversion-era and renovated interiors is wide and known to active buyers. Price to condition honestly — run the Renovation Cost Calculator against your asking strategy.

If you're considering 175–177 East 77th Street, also evaluate:

• 176 East 77th Street (Lenox Manor) — the full-service postwar co-op directly across the street; more building, stricter framework, lower per-foot pricing
• 170 East 77th Street (The Diamond House) — Boak & Paris's 1940 sister building for the same developers, also now a condominium; the closest like-for-like comp in the city
• 255 East 77th Street — the corridor's new-development condominium; the price ceiling for the street
• 188 East 78th Street (The Empire) — the same sponsors' circa-2000 tower around the corner; the larger-scale alternative
• 205 East 77th Street (Dover House) — postwar co-op neighbor east of Third
• 170 East 78th Street (The Morgan Studios) — 1927 boutique pre-war co-op one block north; the character alternative with co-op mechanics
• 180 East 79th Street — Schwartz & Gross pre-war co-op; the scale and pedigree step-up
• 200 East 74th Street — white-brick postwar co-op three blocks south; the value-tier full-service alternative

The Roebling Team at Compass works Lenox Hill and the broader Upper East Side as a core practice area. We publish this building profile because buyers and sellers here deserve building-specific intelligence — conversion history, address mechanics, light-and-air analysis, and corridor comparables — not generic neighborhood commentary.

If you're considering a transaction at 175–177 East 77th Street, a 30-minute consultation is the right starting point.