- Year built
- 1924
- Type
- Cooperative
- Units
- 38
- Floors
- 10
- Landmark
- No
- Amenities
- Central laundry room, bike room, private storage
- Pets
- Permitted
- Financing
- 75 percent maximum (25 percent minimum down)
124 East 84th Street is a study in the quiet end of the Upper East Side co-op market: a 1924 boutique pre-war of roughly four residences per floor, mid-block on a tree-lined street between Park and Lexington Avenues, two blocks from the 86th Street express station and inside the P.S. 6 zone. It carries none of the avenue addresses' trophy pricing — and that is precisely its position. Buyers get the pre-war envelope, the boutique scale, and the school district at a meaningful discount to the Park Avenue corridor one hundred feet west.
What distinguishes the building structurally is its policy framework, which is unusually flexible for this corridor. Listing records document 75 percent financing, permitted pieds-à-terre, permitted guarantors, gifting, and co-purchasing, and subletting after one year of residence — a stack that most comparable Park and Lexington co-ops restrict far more tightly. For first-time buyers stretching with family help, for parents purchasing with or for adult children, and for buyers who want pre-war ownership without a 50-percent-down board culture, the building's framework widens the door considerably.
The ownership paperwork has one wrinkle worth knowing: the conversion plan on file in The Roebling Research Library was first offered in January 1980 under Starlight Holding Corporation as sponsor-seller, while brokerage records date the completed conversion to 1984 — and the cooperative entity in city records ("124 E 84 St Tenants Corp") does not exactly match the corporation named in the 1980 plan. The likeliest explanation is a refiled or restructured plan between 1980 and 1984, a common pattern in that era's conversion market. It is a diligence item, not a concern — but your attorney should reconcile it.
Architecture and unit composition
The building rises ten stories in red brick, its formality concentrated at the entrance — a canopy set into a broken-pediment limestone surround, two steps up from the sidewalk — with window reveals articulating the second and top floors. The original architect is not reliably documented in public records, and we decline to guess; the building reads as solid 1920s middle-Gold-Coast fabric, built in the same cycle that filled the Park-to-Lexington side streets with mid-rise apartment houses.
Inside, the roughly 37 apartments distribute at about four per floor — predominantly one- and two-bedrooms with pre-war proportions, plus larger three-bedroom combinations created over the decades (the unit count's drift from 38 in the offering plan to 36 in city records is the combination history made visible). Scale is the building's character: short hallways, few neighbors per landing, and a small-house social fabric that larger avenue co-ops cannot replicate.
Building operations
The service model is boutique: a doorman attends the lobby from 8 a.m. to midnight rather than around the clock, with a live-in superintendent anchoring operations. Amenities are the useful pre-war basics — central laundry, bike room, private storage — with no gym, garage, or roof deck. Buyers comparing monthly carry against full-service buildings should price the trade honestly: the staffing model is leaner and the maintenance reflects it. The cooperative's offering plan is on file in The Roebling Research Library; current financial statements should be requested through the managing agent during diligence.
Recent sales
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Recent transfers at this building, sourced from NYC Department of Finance records. Apartment-level detail (line, condition, asking-price context) verified upon consultation request.
| Date | Unit | Price |
|---|---|---|
| Jan 30, 2026 | 1D | $850,000 |
| Jun 20, 2025 | 8D | $999,000 |
| Jul 25, 2023 | 3A | $1,550,000 |
| Oct 3, 2022 | 5D | $1,085,000 |
| Jul 25, 2022 | 6D | $985,000 |
| Jun 5, 2021 | 9C | $1,100,000 |
Full closing history with price-per-square-foot over time, the complete retrade record, and every line that has traded.
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01512-0059) 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.
What to know if you’re buying
The policy stack is the headline. 75 percent financing, pieds-à-terre, guarantors, gifting, co-purchase, and one-year sublet seasoning is a genuinely flexible framework for this corridor. If your purchase structure has been a problem at stricter buildings, this one deserves a look — but confirm every term with the managing agent, as policies evolve.
Calibrate the service model. The doorman covers 8 a.m. to midnight, not 24 hours. For most buyers this is invisible; for late-arrival households and heavy-package lifestyles it is worth weighing against the lower carry it buys.
The location math is strong. Two blocks to the 4/5/6 express at 86th Street, the P.S. 6 zone, Central Park and Museum Mile a few minutes west, and the 86th Street retail spine a block north. The mid-block position keeps the street quiet while everything sits within a five-minute radius.
Run the board numbers early. A 25-percent-minimum-down framework still comes with a board review; run the Co-op Board Qualification Calculator before offering, and have the conversion-history question (1980 plan versus 1984 conversion) on your attorney's checklist.
Verify the fee stack. The flip tax is not documented publicly, and sublet terms (one-year seasoning, three-year cap) come from listing records. Confirm both, plus any assessments, before contract.
What to know if you’re selling
Sell the structure, not just the apartment. The building's financing and flexibility framework materially widens your buyer pool relative to stricter neighbors — parents buying with children, pied-à-terre buyers, gift-funded first-time buyers. Marketing that names these policies outperforms generic pre-war copy.
Anchor to the side-street market, not the avenues. Your comparables are the boutique pre-wars between Park and Third in the low 80s, not 1000 Park or the avenue corners. Pricing against the right set shortens days on market.
Condition drives the spread. In a four-per-floor building, same-line comparables are scarce; renovated-versus-estate condition explains most of the price variance. Run the Renovation Cost Calculator against your asking strategy if your unit is original.
Comparable buildings
If you're considering 124 East 84th Street, also evaluate:
- 1000 Park Avenue — the Park Avenue corner anchor of the block; the prestige step-up
- 1045 Park Avenue — Schwartz & Gross pre-war co-op two blocks north; the avenue alternative
- 1100 Park Avenue — larger pre-war co-op at 89th; the full-service Carnegie Hill step-up
- 170 East 78th Street — boutique pre-war co-op on a comparable Park-Lexington side street
- 180 East 79th Street — Schwartz & Gross side-street pre-war with larger lines
- 130 East 75th Street — side-street pre-war co-op with a similar boutique proposition further south
- 12 East 87th Street — the Capitol; pre-war co-op off Fifth at a similar price band
- 19 East 88th Street — Carnegie Hill pre-war co-op; the step-up two blocks north
The Roebling Team at 124 East 84th Street
The Roebling Team at Compass works the Upper East Side — the avenue co-ops and the side-street boutiques alike — as a core practice area. We publish this building profile because buyers and sellers on these blocks deserve building-specific intelligence — policy framework, conversion documentation, and corridor-level comparables — not generic neighborhood commentary.
If you're considering a transaction at 124 East 84th Street, a 30-minute consultation is the right starting point.