The Strathmore (400 East 84th Street)
400 East 84th Street, New York, NY 10028
- Year built
- 1994
- Type
- Cooperative — structured as a condop
- Units
- 180
- Floors
- 44
- Landmark
- No
- Pets
- Pets permitted
- Pied-à-terre
- Allowed
- Financing
- Up to approximately 80 percent financing (condop / co-op model — a lower down payment than a traditional co-op); confirm current terms at offer stage
Every recorded sale at this building, 2026–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $1,631
- Listing discount
- -2.3%
- Recorded sales
- 53
- On record
- 2026–2026
The Strathmore is a roughly 44-story Yorkville tower at First Avenue and 84th Street, built in 1994 to a Costas Kondylis design for The Related Companies, and in the current cycle undergoing a rental-to-condop conversion with an offering plan on file and sales underway. For buyers, the essential fact is the ownership structure: the building is being sold as a condop — a cooperative in which a co-op corporation owns the residential condominium unit, so shares are sold and financed on a co-op model, but the house rules carry condominium-style flexibility. That structure is the building's value proposition, because it pairs a lower down payment and a per-room pricing convention with permissive pied-à-terre, sublet, and financing rules.
The building's amenity package is unusually deep for the corridor. Beyond the standard full-service baseline — concierge, doorman, live-in superintendent, fitness center, landscaped garden, attended parking, children's playroom, and bike room — The Strathmore carries a swimming pool and a squash court, the latter a genuine rarity in Yorkville residential. The condop repositioning included an interiors program by Ingrao Inc., giving the converting inventory a new-development finish register.
The Strathmore also carries a piece of Upper East Side development history. Its 1994 construction was a flashpoint in the neighborhood's downzoning fight: Related moved to establish the foundation ahead of a zoning change that would have curtailed the plaza bonus enabling the tower's height, community litigation followed and failed, and the tall, slender tower was completed — one of the more prominent products of that era of the corridor's building boom.
Building operations
The Strathmore operates as a full-service building with concierge and doorman coverage, a live-in superintendent, and one of the deeper amenity packages in Yorkville: the fitness center, the swimming pool, the squash court, the landscaped garden, the attended parking garage, the children's playroom, and the bike room. The building is smoke-free.
Because the building is mid-conversion, the operating and financial picture is in transition. Buyers should treat the offering plan as the source of truth for the building's structure, the affordable-rental split, the maintenance and reserve position, and any sponsor obligations, and should review it carefully with a cooperative attorney during due diligence.
Recent sales
The Strathmore's current sales cycle is a sponsor conversion, so pricing reflects launch pricing on the converting inventory rather than a long secondary-market history. Launch pricing has run broadly from the high-$900,000s for one-bedroom inventory into the low-$2 million range for two-bedrooms and higher for three- and four-bedroom homes, with individual unit pricing set against the specific layout, floor, and exposure. Because the building is priced on a cooperative (per-room) convention, comparable analysis should reference the room count and layout rather than a strict per-square-foot figure.
As with any sponsor conversion, the offering plan governs — pricing, terms, the affordable-rental split, and any sponsor obligations should all be confirmed against it.
Recent transfers at this building, curated by The Roebling Team research desk. Apartment-level facts are independently verified before publishing; sale prices reflect the recorded transfer amount at the NYC Department of Finance.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Jun 30, 2026 | 6C | 1 BR · 1 BA · 748 sf | $1,040,000 | $1,390/sf | off-mkt |
| Jun 24, 2026 | 11D | 1 BR · 1 BA · 654 sf | $981,848 | $1,501/sf | +2.3% |
| Jun 17, 2026 | 29B | 3 BR · 3 BA · 1,625 sf | $3,328,870 | $2,049/sf | +6.5% |
| Jun 17, 2026 | 27C | 2 BR · 2 BA · 1,178 sf | $2,046,428 | $1,737/sf | +3.6% |
| Jun 17, 2026 | 32C | 4 BR · 3.5 BA · 2,429 sf | $5,098,544 | $2,099/sf | +4.3% |
| Jun 16, 2026 | 23B | 3 BR · 3 BA · 1,624 sf | $3,140,031 | $1,934/sf | +6.6% |
| Jun 15, 2026 | 24A | 2 BR · 2 BA · 1,302 sf | $2,261,228 | $1,737/sf | +6.9% |
| Jun 15, 2026 | 38C | 4 BR · 3.5 BA · 2,429 sf | $5,205,825 | $2,143/sf | +2.1% |
Market read. Most recent trades (2026) cleared a median $1,631/sf across 53 sales. Median listing discount -2.3% over ask.
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 1-01563-7501) 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; square footage on co-ops is not officially recorded, figures shown are approximate.
What to know if you’re buying
The condop structure is the point. Lower down payment, per-room pricing, and condominium-flexible house rules — pied-à-terre and sublet use permitted — together produce a more accessible and more flexible ownership than a traditional corridor co-op.
The amenity package is a differentiator. The pool and squash court are rare in Yorkville; weigh them against the carrying cost.
Read the offering plan carefully. The building is mid-conversion. The plan is the source of truth for structure, the affordable-rental split, financials, and sponsor obligations. Review it with a cooperative attorney.
Confirm the specific unit's status. During a conversion, unit availability and status change; confirm current terms with the sponsor at offer stage.
What to know if you’re selling
Once the conversion seasons, lead with the structure and amenities. The condop flexibility and the pool-and-squash amenity set are the building's most marketable features.
Price on the cooperative convention. Reference room count and layout, and the building's converting-inventory comparables.
Comparable buildings
If you're considering The Strathmore, also evaluate:
- 400 East 85th Street — nearby Yorkville full-service cooperative with an accessible policy framework
- 171 East 84th Street (Evans Tower) — nearby condominium with a retractable-dome rooftop pool
- 360 East 88th Street (Leighton House) — Polshek-designed Yorkville condominium
- 200 East 89th Street (The Monarch) — Yorkville condominium with an indoor atrium pool
- 401 East 89th Street (Gracie Towne House) — flexible far-Yorkville condop near Carl Schurz Park
- 1175 York Avenue (York River House) — Lenox Hill condop (flexible-ownership comparison)
The Roebling Team at The Strathmore
The Roebling Team at Compass works extensively across the Upper East Side cooperative, condop, and condominium market, including sponsor conversions in the Yorkville corridor. We publish this building profile because Strathmore buyers and sellers deserve building-specific intelligence — the condop structure, the offering-plan mechanics of a conversion, the amenity package, and comparable analysis at the apartment level — not generic neighborhood commentary.
If you're considering a purchase or sale at The Strathmore, a 30-minute consultation is the right starting point.
The neighborhood
For the full corridor — architecture, schools, transit, and pricing across Upper East Side — read The Roebling Team Guide to Upper East Side.
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