12 East 88 Street

1. BUILDING OVERVIEW (ANALYST FRAMING)

12 East 88 Street is a Recent Development Condo (Built 1931, Converted 2016) located in the Carnegie Hill / Upper East Side market. Standing 13 floors tall with 24 units, it functions as a luxury prewar conversion offering full-service amenities in a boutique setting.

Based on transaction history and the current NYXRCSA benchmark of 331.14 (Oct 2025), the building is classified as Yield-Oriented (Secondary: Stagnant/Defensive).

This classification is justified by the divergence between its elite rental performance and its stagnant equity appreciation. While the NYXRCSA index reached an all-time high of 331.14 in late 2025, resale units in this building have failed to capture significant capital growth relative to their 2017–2018 sponsor basis. The definitive signal is Unit 8E, which sold in Dec 2017 for $1.45M and resold in Feb 2025 for $1.525M—a total nominal gain of only 5.0% over 7.2 years (CAGR ~0.7%), representing a substantial real loss against inflation. Conversely, rental yields are exceptional, with units achieving $108–$140 PPSF and fast absorption, indicating the asset is valued for consumption rather than speculation.

2. UNIT MIX & COMPOSITION

Based on transaction-weighted data from 34 recorded sales, the inventory is heavily skewed toward large family-sized residences:

• 1BR: ~15% of activity (5 sales). Avg PPSF $1,904. Liquidity engine.

• 2BR: ~20% of activity (7 sales). Avg PPSF $2,100+.

• 3BR: ~20% of activity (Sales like 1C, 3A, 7B).

• 4BR+: ~45% of activity (15 sales). Dominant Inventory Type. Includes massive 3,000–4,000 sqft units (Lines A, B, PH).

Influence on Behavior: The dominance of 4BR+ units (3,000+ sqft) creates a high-stakes, lower-velocity market. While 1BR units turnover with some regularity, the large units are "forever homes" that face significant liquidity friction when priced incorrectly (e.g., TH1 taking 478 days). The unit mix supports high nominal pricing but limits transaction volume.

3. LINE (STACK) PERFORMANCE — RESALE ONLY

Note: Pursuant to the Sponsor Normalization Rule, sales from 2017–2018 with "No Listing" or short DOM (e.g., 6C, 8A, 2D, 4A) are treated as Sponsor Baseline and excluded from resale liquidity metrics.

A. Liquidity

• Fastest: Unit 1C sold in 37 days (2021). Unit 7A sold in 51 days (2020).

• Slowest: Unit TH1 took 478 days (2021). Unit 10A took 210 days (2020). Unit PH11/12B took 112 days (2025).

• Median Resale DOM: Approximately 112 days for non-townhouse resales. The Townhouse units are outliers with extreme illiquidity (124–478 days), pulling the building-wide average up.

B. Price Strength

• Ceiling (Sponsor Peak): Pricing power peaked during the 2017–2019 sellout. PH11A sold for $2,562 PPSF in 2019. Unit 8B sold for $2,465 PPSF in 2017.

• Baseline (Current): The 2025 baseline has compressed to $2,027–$2,135 PPSF.

  • Unit 8E (1BR): $2,135 PPSF (2025).

  • PH11/12B (3BR): $2,027 PPSF (2025).

• Regression: Current high-floor units (PH11/12B) are clearing ~17% below the nominal PPSF established by mid-floor sponsor units in 2017 (e.g., 8B at $2,465 PPSF).

C. Appreciation

• Stagnation: Unit 8E gained only +5.0% total between 2017 and 2025.

• Modest Growth: Unit 1C gained +5.3% between 2018 ($3.3M) and 2021 ($3.475M).

• Townhouse Distress: TH1 traded at $1,338 PPSF in 2021, a massive discount to the building average of ~$2,100 PPSF.

4. BUILDING-WIDE PPSF TREND (NORMALIZED)

The building is in a Structural Stagnation phase.

• Sponsor Peak (2017–2019): Sales consistently cleared $2,200–$2,500 PPSF. (e.g., 8B, 6D, PH11A).

• Correction (2020–2021): Large unit resales dropped to $1,760–$1,900 PPSF. (e.g., 10A, 9A, 7A).

• Current Reality (2025): Recent trades have recovered slightly to $2,027–$2,135 PPSF, but remain below the 2017 peaks.

• Trend: Flat/Defensive. Despite the NYXRCSA index rising to 331.14 (All-Time High), 12 East 88 Street is trading flat against its 2017 basis.

5. RENT CAPTURE ANALYSIS

Effective Annual Rent Calculation: (Achieved Rent × (365 − Rental DOM) ÷ 365).

A. Rent Capture

• Unit 2C (2BR):

  • Rent: $12,450 ($108 PPSF).

  • DOM: 9 days.

  • Effective Rent: ~$12,143/mo.

  • Status: Elite Capture. Very fast absorption at top-tier pricing.

• Unit 8A (4BR):

  • Rent: $35,000 ($140 PPSF).

  • DOM: 37 days.

  • Effective Rent: ~$31,452/mo.

  • Status: Elite Capture. High nominal value maintained.

B. Rent Appreciation

• Strong Growth: Unit 2C rented for $8,600 in 2020 and $12,450 in 2025. This represents +44.7% total growth over 5 years.

• Stability: Unit 8A rented for $35,000 in 2022 and $35,000 in 2024. Flat performance at the top end of the market.

6. B³ SCORING SYSTEM (0–100)

• Liquidity Score: 50/100 (Median resale DOM ~112 days. Significant friction in large units and townhouses [478 days]. Not a high-velocity building).

• Rent Capture Score: 85/100 (Exceptional metrics. Rents consistently exceed $100 PPSF, reaching $140 PPSF. Unit 2C shows massive growth and <10 day liquidity).

• Appreciation Score: 30/100 (Confirmed stagnation. Unit 8E [+5% in 7 years] and Unit 1C [+5% in 3 years] show the asset fails to generate alpha. Current PPSF is below 2017 sponsor levels).

• Composite Score: 53.5/100.

7. TRANSACTION EXAMPLES

Resale Stagnation (Long Hold):

• Unit 8E (1BR / 714 sqft):

  • Sold Dec 2017: $1,452,500 ($2,034 PPSF).

  • Sold Feb 2025: $1,525,000 ($2,135 PPSF).

  • Result: +5.0% Nominal Gain over 7.2 years (~0.7% CAGR). Driver: 1 (Market Regime) & 5 (Sponsor Normalization).

Resale Appreciation (Modest):

• Unit 1C (3BR / 1,623 sqft):

  • Sold Jun 2018: $3,300,000 ($2,033 PPSF).

  • Sold Aug 2021: $3,475,000 ($2,141 PPSF).

  • Result: +5.3% Nominal Gain over 3.1 years. Driver: 1.

Implicit Depreciation (Sponsor vs Resale):

• Unit 8B (2017) vs PH11/12B (2025):

  • Unit 8B (Sponsor 2017): $2,465 PPSF.

  • PH11/12B (Resale 2025): $2,027 PPSF.

  • Result: -17.7% Valuation Compression despite higher floor utility. Driver: 5 (Sponsor Price Normalization).

Rent Growth:

• Unit 2C (2BR Rental):

  • Jan 2020 Rent: $8,600.

  • Aug 2025 Rent: $12,450.

  • Result: +44.7% Total Growth over 5.6 years. Driver: 1.

8. RISKS & RED FLAGS

• Sponsor Premium Trap: Early buyers in 2017–2018 paid $2,200–$2,400 PPSF. Resales in 2025 are clearing near $2,000–$2,100 PPSF, leaving no room for equity growth.

• Townhouse Illiquidity: The ground-floor/maisonette units (TH1, TH2) are outliers that trade at massive discounts ($1,300–$1,400 PPSF) and take over a year to sell.

• High Carrying Costs: The stagnation in price suggests maintenance/tax loads may be capping appreciation potential.

9. EXECUTIVE SUMMARY

12 East 88 Street is a Yield-Oriented luxury boutique condo that functions as an elite income generator but a stagnant store of value for equity. Despite the NYXRCSA index hitting an all-time high of 331.14 in 2025, resale units like Unit 8E have delivered negligible growth (+5% total) over 7-year holding periods. The building commands top-tier rents ($108–$140 PPSF) with rapid absorption (Unit 2C rented in 9 days), making it a high-performing asset for landlords. However, the premium pricing established by the sponsor in 2017 ($2,400+ PPSF) has not been sustained in the resale market, which now clears near $2,000–$2,100 PPSF. Investors should view this as a defensive income play, entering only at a basis below $1,900 PPSF.

B³ SCORECARD

• Liquidity Score: 50

• Rent Capture Score: 85

• Appreciation Score: 30

• Composite Score: 53.5

• Category: Yield-Oriented (Stagnant/Defensive)

• Unit Mix: 45% 4BR+ / 20% 3BR / 20% 2BR / 15% 1BR [Transaction Weighted]

• Sponsor Normalization: Sales from 2017–2018 with "No Listing" or short DOM (e.g., 6C, 8A, 2D, 4A) treated as Sponsor/Conversion Baseline.