400 Park Avenue South
1. BUILDING OVERVIEW (ANALYST FRAMING)
Building Type: Recent Development Condo (Vintage: 2014)
Scale: 40 Floors, 81 Units
Classification: Yield-Oriented (Leaning Distressed on Equity)
Sponsor Normalization Disclosure:
Transactions Reclassified: Approximately 20–25 transactions from late 2015 through early 2016 were identified as Sponsor-driven ("No Listing" or DOM < 30 days).
Impact: The Sponsor successfully set a high pricing baseline (~$2,000–$2,800 PSF) during the 2015 market peak. Post-sponsor resale analysis reveals a structural inability to support these price levels, with the majority of resales closing at flat or negative nominal values over 8–10 year holds.
Analyst Framing: 400 Park Avenue South behaves as a wealth destruction vehicle regarding equity, despite its luxury profile. While the broader market (NYXRCSA) gained ~15–18% from 2016 to 2025, this asset has consistently delivered negative or 0% returns to original buyers. It functions strictly as a high-yield rental depot, provided one owns the smaller units; larger units suffer from catastrophic vacancy drag.
2. UNIT MIX & COMPOSITION
Analysis based on transaction volume.
Unit Type | Size Range | % of Activity | Role in Portfolio |
1-Bedroom | 798 – 842 SF | ~40% | Liquidity Core. The only segment with functional liquidity. |
2-Bedroom | 1,250 – 1,888 SF | ~35% | Volatility Trap. Moderate volume, high depreciation risk. |
3-Bedroom+ | 2,300 – 4,000+ SF | ~25% | Liquidity Concrete. Extremely slow moving in both sales and rentals. |
Impact: The building is a "Glass Shard" prism where floor plates change, creating inconsistent stacks. The unit mix favors the smaller 1-bedrooms for yield; the large units (2,500+ SF) are misaligned with the location's absorption capacity, leading to massive days-on-market (DOM) bloat.
3. LINE (STACK) PERFORMANCE — RESALE ONLY
A. Liquidity (Ranked Fastest $\to$ Slowest)
1-Bedrooms (Various Lines): Median DOM ~35–60 days (e.g., Unit 29A: 34 days; Unit 30A: 610 days outlier, but generally faster).
2-Bedrooms: Median DOM ~100–150 days.
3-Bedrooms/PH: Median DOM 300+ days. (e.g., PH1: 415 days; Unit 28B: 488 days).
B. Appreciation (Compound Growth)
Benchmark Context: NYXRCSA Index rose from ~280 (2016) to ~330 (Nov 2025), a +17.8% market move.
400 PAS Performance:
1-Bedrooms: Flat to +1.5% CAGR. (Tracking significantly below inflation).
2/3-Bedrooms: Negative CAGR. Multiple confirmed losses of -5% to -17% on nominal price after nearly a decade of ownership.
4. RENT CAPTURE ANALYSIS
MANDATORY: Effective Annual Rent Calculation Note: The divergence between Small and Large unit rental performance is extreme.
A. Rent Capture by Unit Type
1-Bedroom (e.g., Unit 34D, 35D, 31D - 2024/2025)
Achieved Rent: ~$7,000 – $7,250
Rent/SF: ~$100 – $103 PSF
Avg Rental DOM: ~7 days
Efficiency: Excellent. Minimal leakage.
Calculation: $7,250 $\times$ (358 $\div$ 365) = $7,110 Effective Monthly Rent.
3-Bedroom Large (e.g., Unit 30B, 36C - 2024)
Achieved Rent: ~$17,000 – $20,500
Rent/SF: ~$88 – $118 PSF
Avg Rental DOM: 250+ days (Unit 36C: 247 days; Unit 30B: 260 days).
Efficiency: Catastrophic Failure.
Calculation (Unit 30B): $20,500 $\times$ (365 - 260) $\div$ 365 = $5,897 Effective Monthly Rent.
Insight: Owners of large units are losing ~70% of their annual income potential by refusing to lower face rents, resulting in effective yields closer to $25 PSF than the advertised $88 PSF.
5. B³ SCORING SYSTEM (0–100)
A. Liquidity Score: 30
Speed: Poor. While 1-beds can move in <60 days, the building average is dragged down by large units sitting for 150–400+ days.
Consistency: Highly volatile.
Depth: Shallow resale pool; most owners are locked in "equity traps" unable to sell without loss.
B. Rent Capture Score: 65
Rent Efficiency: High nominal PPSF ($100+) supports the score.
Rental Absorption: Bipolar. Studios/1-Beds are elite (7 days); Large units are failing (200+ days).
Stability: Depends entirely on unit size.
C. Appreciation Score: 10
Magnitude: Failure. 0% to Negative CAGR dominates the building history.
Durability: The building has failed to capture the 2019–2025 market recovery.
6. COMPOSITE SCORE & CLASSIFICATION
Composite Score: (30 $\times$ 0.35) + (65 $\times$ 0.30) + (10 $\times$ 0.35) 10.5 + 19.5 + 3.5 = 33.5
Category: Yield-Oriented (Distressed Equity) Note: This score is exceptionally low for a luxury building. It indicates that the asset is purely a rental yield vehicle and a liability for equity growth.
7. TRANSACTION EXAMPLES
Drivers: 1) Market regime timing (2015 Peak), 4) Unit size imbalance, 5) Sponsor price normalization.
Resale Depreciation / Stagnation (The Norm)
Unit 23B (2 Bed):
Buy: $2.90M (Apr 2016) $\to$ Sell: $2.90M (Oct 2025).
Hold: 9.5 years. Total: 0%. Real Loss (Inflation): ~-25%.
Driver: Market regime timing (Bought Sponsor Peak).
Unit 24A (2 Bed):
Buy: $2.55M (Oct 2015, Sponsor) $\to$ Sell: $2.30M (Dec 2023).
Hold: 8 years. Total: -9.8% Loss.
Driver: Sponsor price normalization.
Unit 29C (3 Bed):
Buy: $5.88M (Nov 2015, Sponsor) $\to$ Sell: $5.45M (Jul 2022).
Hold: 6.5 years. Total: -7.3% Loss.
Driver: Unit size/mix imbalance (Large units lack liquidity).
Unit 23A (2 Bed):
Buy: $2.47M (Oct 2015) $\to$ Sell: $2.05M (Oct 2021).
Hold: 6 years. Total: -17% Loss.
Driver: Liquidity shift.
Unit 31C (2 Bed):
Buy: $3.91M (Jun 2018) $\to$ Sell: $3.80M (Jul 2023).
Hold: 5 years. Total: -2.8% Loss.
Driver: Line-level premium persistence (Overpaid in 2018).
Resale Appreciation (Rare / Modest)
Unit 29A (1 Bed):
Buy: $1.63M (Oct 2015) $\to$ Sell: $1.82M (Apr 2024).
Hold: 8.5 years. Total: +11.7%. CAGR: 1.3%.
Driver: Unit size (Small units hold value better).
Unit 30A (1 Bed):
Buy: $1.83M (Nov 2016) $\to$ Sell: $1.99M (Oct 2024).
Hold: 8 years. Total: +9.1%. CAGR: 1.1%.
Driver: Market regime timing.
8. RISKS & RED FLAGS
The "Sponsor Premium" Hangover: The 2015/2016 closing prices were ~20% above sustainable market value. Resales today are still correcting back to reality.
Large Unit Vacancy: Do not buy 2-Bedroom or 3-Bedroom units for investment. Rental data shows 200+ day vacancies are common as owners stubbornly ask for $20k/month.
Liquidity Cliff: In a softening market, this building freezes. DOMs quickly expand to 1+ years (e.g., PH1 took 415 days; 28B took 488 days).
9. EXECUTIVE SUMMARY
400 Park Avenue South is a Yield-Oriented / Distressed Equity asset that has structurally underperformed the NYC market since its inception. Post-sponsor analysis confirms that early buyers (2015–2016) overpaid significantly, resulting in a decade of 0% or negative capital appreciation while the broader NYXRCSA index rose ~18%. The building functions effectively only as a rental vehicle for 1-Bedroom units, which clear quickly and command $100+ PSF. However, larger units (2-3 Beds) are capital traps, suffering from 200+ day rental vacancies and 400+ day resale timelines. Avoid this building for growth; approach only for specific small-unit cash flow plays.
B³ SCORECARD
Metric | Score | Notes |
Liquidity | 30 | Severe congestion in large units (300+ days). |
Rent Capture | 65 | Elite for 1-Beds; disastrous vacancy for 3-Beds. |
Appreciation | 10 | Critical Failure. Widespread nominal losses. |
Composite | 33.5 | Yield-Oriented (Distressed) |
Unit Mix Summary:
Core Inventory: 1-Bedrooms drive volume; 3-Bedrooms drive stagnation.
Opportunity: 1-Bedroom rentals (High yield, fast clear).
Avoid: Purchasing any unit for appreciation; specifically avoid A/B/C lines (Large Units) for rental income due to vacancy risk.