49 East 21st Street
1. BUILDING OVERVIEW (ANALYST FRAMING)
Building Type: Condo Conversion (Vintage: 2004 Conversion / 1906 Construction)
Scale: 12 Floors, 43 Units
Classification: Yield-Oriented (Secondary: Defensive)
Sponsor Normalization Disclosure:
Transactions Reclassified: Approximately 35 transactions between Nov 2004 and Jul 2005 were identified as Sponsor-driven ("No Listing" with close dates clustered).
Impact: The Sponsor baseline was established at ~$800–$900 PSF. Including these would inflate appreciation metrics artificially over 20 years. Normalized analysis focuses on the resale-to-resale behavior, which exposes a distinct "price ceiling" hit in 2016 that the building has not breached since.
Analyst Framing: 49 East 21st Street behaves as a classic Flatiron equity plateau. While early buyers (2004–2010) realized significant gains, the asset has effectively stopped compounding since the 2015–2016 market peak. Resale pairs from 2016, 2018, and 2023 show 0% nominal growth, lagging the NYXRCSA benchmark significantly. The building now functions as a high-occupancy rental anchor (~$75 PSF) rather than a growth vehicle.
2. UNIT MIX & COMPOSITION
Analysis based on transaction inventory.
Unit Type | Size Range | % of Activity | Role in Portfolio |
2-Bedroom (Lofts) | 1,282 – 1,461 SF | ~90% | The Monoculture. The building is almost entirely homogenous 2-bed product. |
PH / 3-Bedroom | 1,600 – 2,600 SF | ~10% | Outliers. Rare trading, higher volatility. |
Impact: The lack of unit diversity (no studios, few true 3-beds) creates direct internal competition. When multiple B, C, or D lines list simultaneously, they are near-perfect substitutes, limiting pricing power. This homogeneity contributes to the flat pricing trends, as buyers can easily benchmark against past sales.
3. LINE (STACK) PERFORMANCE — RESALE ONLY
A. Liquidity (Ranked Fastest $\to$ Slowest) Note: Liquidity has deteriorated significantly post-2020.
B Lines (1,308 SF): Historical Median DOM ~20–40 days. (Fastest clearing).
C Lines (1,461 SF): Median DOM ~30 days (pre-2021).
D Lines (1,282 SF): Volatile. Ranging from 18 days (2014) to 175–256 days (2021–2022).
A Lines (1,375 SF): Slowest. Recent examples show 67, 94, and 202 days.
B. Appreciation (Compound Growth)
Benchmark Context: NYXRCSA Index rose from ~270 (2016) to ~330 (2025), a +22% market move.
49 East 21st Performance:
2016–2024: 0% CAGR. Multiple resale pairs confirm that unit values are identical to their 2016/2018 trading prices.
2004–2015: Strong growth (+100%). The appreciation engine turned off a decade ago.
4. RENT CAPTURE ANALYSIS
MANDATORY: Effective Annual Rent Calculation
A. Rent Capture by Line
Standard 2-Bedroom (Lines A/B/D)
Achieved Rent: ~$7,900 – $8,350 (2023–2024)
Rent/SF: ~$72 – $76 PSF
Avg Rental DOM: 5–20 days (Extremely efficient).
Efficiency: High.
Calculation (Unit 4B): $7,950 $\times$ (360 $\div$ 365) = $7,841 Effective Monthly Rent.
Insight: The building is a rental powerhouse. Tenants absorb these "cookie-cutter" Flatiron lofts rapidly.
Premium Pricing Risk (Line C / PH)
Example: Unit 11C (Jan 2024)
Ask: $17,500 $\to$ Rented: $11,000 (37% Discount).
Rental DOM: 71 days.
Insight: Over-reaching on price is punished severely. The market values this building strictly at the ~$75–$80 PSF band.
5. B³ SCORING SYSTEM (0–100)
A. Liquidity Score: 58
Speed: Mixed. 2024 shows improvement (~60 days), but 2021–2022 saw severe congestion (175–256 days).
Consistency: The homogenous units create "traffic jams" when multiple hit the market.
B. Rent Capture Score: 78
Rent Efficiency: Strong ~$75 PSF floor.
Absorption: Excellent for market-priced units (<20 days).
Stability: High. Flatiron 2-beds are a liquid rental commodity.
C. Appreciation Score: 30
Magnitude: Failure. 0% nominal growth for 8 years (2016–2024).
Durability: The building defends its value (rarely drops significantly below 2015 levels) but refuses to grow.
6. COMPOSITE SCORE & CLASSIFICATION
Composite Score: (58 $\times$ 0.35) + (78 $\times$ 0.30) + (30 $\times$ 0.35) 20.3 + 23.4 + 10.5 = 54.2
Category: Yield-Oriented (Defensive) Note: The score reflects a safe place to park capital for rental yield, but a "dead" asset for equity growth in the current cycle.
7. TRANSACTION EXAMPLES
Drivers: 1) Market regime timing, 3) Liquidity shift, 2) Line-level premium persistence.
Resale Stagnation / Depreciation (The "Lost Decade")
Unit 4D (2 Bed):
Buy: $2.25M (Mar 2016) $\to$ Sell: $2.25M (May 2023).
Hold: 7 years. Total: 0.0%. (Real loss after inflation/fees: ~-20%).
Driver: Market regime timing (Peak 2016 entry).
Unit 4A (2 Bed):
Buy: $2.60M (Jun 2018) $\to$ Sell: $2.61M (Jan 2024).
Hold: 5.5 years. Total: +0.4%.
Driver: Line-level premium persistence (Price ceiling hit).
Unit 2D (2 Bed):
Buy: $2.15M (Apr 2018) $\to$ Sell: $1.975M (Aug 2022).
Hold: 4 years. Total: -8.1% Loss.
Driver: Liquidity shift (Sold into a high-DOM environment, 175 days).
Resale Appreciation (Historical / Long Hold)
Unit 4A (2 Bed) - Full Cycle:
Buy: $1.74M (Jan 2008) $\to$ Sell: $2.60M (Jun 2018).
Hold: 10 years. Total: +49%. CAGR: 4.1%.
Driver: Market regime timing (Pre-2010 entry captures growth).
Unit 5C (2 Bed):
Buy: $1.62M (Oct 2006) $\to$ Sell: $2.23M (Jan 2018).
Hold: 11 years. Total: +37%. CAGR: 2.9%.
Note: Even long holds barely beat inflation.
8. RISKS & RED FLAGS
The "2016 Price Wall": Do not pay above $1,800 PSF. History proves this is the resistance level where equity goes to die.
Internal Competition: With almost every unit being a ~1,350 SF 2-bedroom, you have no uniqueness. If a neighbor sells desperate, your value drops immediately.
DOM Spikes: Be aware that in slower markets (like 2021), DOMs here tripled (from 30 to 175+). This is not a "quick flip" building in bad times.
9. EXECUTIVE SUMMARY
49 East 21st Street is a Yield-Oriented / Defensive asset that serves as a highly efficient rental vehicle but a stagnant equity hold. Post-sponsor analysis confirms that the building hit a hard valuation ceiling in 2016 (~$1,800 PSF) and has generated 0% nominal returns for owners selling between 2016 and 2024. The homogenous unit mix (90% 2-Bedrooms) ensures steady rental demand (low vacancy, ~$75 PSF), but creates resale congestion that suppresses price breakouts. Buy here for stable, predictable rental income; look elsewhere for capital appreciation.
B³ SCORECARD
Metric | Score | Notes |
Liquidity | 58 | Variable. Fast rentals, slow resales in down markets. |
Rent Capture | 78 | Efficient. Low vacancy risk if priced near $75 PSF. |
Appreciation | 30 | Stagnant. 0% growth for nearly a decade. |
Composite | 54.2 | Yield-Oriented |
Unit Mix Summary:
Core Inventory: 2-Bedroom Lofts (~1,300 SF) dominate.
Opportunity: Rental yield on any line (A/B/C/D).
Avoid: Expecting resale profit on short-medium term holds.