Brownstone Lane - 309 West 118 Street

1. BUILDING OVERVIEW (ANALYST FRAMING)

• Building Type: Postwar Resale Condo (Built 2003).

• Scale: 4 Floors, 48 Units.

• Primary Category: Hybrid.

• Secondary Category: Core / Defensive.

Justification: Post-sponsor data indicates a highly functional building that achieves an exceptional balance of structural compounding and strong secondary market liquidity. Initial sponsor sales cleared at heavily discounted baselines of $250–$480/SF in 2005. Early holders captured massive equity as the building matured into a $1,000–$1,200+/SF bracket during the 2018–2022 mid-to-late cycle. Crucially, unlike neighboring properties that suffered violent mean-reversion, Brownstone Lane has largely maintained its pricing plateau into the 2024 period, achieving $1,048/SF on its most recent standard clearance. By actively preserving its peak equity base and clearing 2BRs efficiently, it successfully tracks the long-term compounding growth of the NYXRCSA benchmark, which pushed to historic all-time highs of ~333 in early 2026.

2. UNIT MIX & COMPOSITION

Based on historic sales data and transaction weighting across recorded sales metrics:

• 1BR/Studio: ~0% of standard sales volume (No pure 1BR/Studio footprints explicitly detailed in primary transactions).

• 2BR: ~90% of sales volume (48 recorded 2BR/2BA transactions).

• 3BR+: ~10% of sales volume (5 recorded transactions across 3BR layouts).

Influence on Liquidity & Rent Behavior: The building is almost a complete monoculture of 2BR/2BA units. However, instead of becoming a structural bottleneck, the 2BR lines here act as a high-velocity liquidity engine. Because these units clear the sales market at an efficient overall building median of 52 days (with 2BR/2BAs specifically at a 41-day median), the building maintains a stable internal rhythm that processes inventory highly effectively. This sizing balance prevents catastrophic structural DOM drag, though the rare, massive 3-bedroom Townhouse layouts occasionally suffer from severe sizing imbalances.

3. LINE (STACK) PERFORMANCE — RESALE ONLY

A. Liquidity

• Fastest Resale Velocity: Standard 2BR lines clear with exceptional efficiency. Lines such as 4L and 3J frequently clear in just 28 to 32 days, driving the 2BR segment's 41-day median.

• Slowest Resale Velocity: Oversized townhouses and specialty 3BR footprints experience immense market friction. Unit 1A (3BR/2.5BA) sat for 322 days, and 1ATPL (2BR) sat for 210 days, highlighting deep resistance for the building's largest units.

B. Price Strength

• Resale pricing is highly stable across the core inventory. Standard 2BR units maintain persistent pricing strength, frequently locking in $1,040–$1,200/SF baselines in mature clears (e.g., 4L at $1,170/SF, 4K at $1,115/SF, 3F at $1,048/SF). Massive lower-floor units command lower nominal per-square-foot baselines (e.g., 1A at $793/SF, THF at $844/SF) due to sheer sizing volume.

C. Appreciation

• Lines have compounded robustly over the long term. Holders who entered during the 2005 phases captured +100% to +300% equity into the mature phase. Mid-cycle and late-cycle buyers have largely preserved their capital baselines, holding flat without suffering destructive mean-reversions.

4. BUILDING-WIDE PPSF TREND (NORMALIZED)

• 2005 (Sponsor Clearance): Initial clearance volume heavily clustered at discounted baselines of $250–$480/SF.

• 2012–2014 (Early Maturation): Steady maturation pushing into the $570–$870/SF bracket.

• 2015–2022 (Mid/Late-Cycle Peak): Rapid expansion achieving peak pricing power in the $1,000–$1,200/SF bracket.

• 2024 (Plateau / Defensive Hold): A highly stable hold, maintaining pricing over $1,040/SF. Conclusion: Compounding into a Stable Plateau. The building securely holds its peak mid-cycle value and successfully tracks the long-term upward trajectory of the NYXRCSA macro index.

5. RENT CAPTURE ANALYSIS

A. Rent Capture by Line & Unit Type

• Note: Only one rental is recorded in the data set (Unit 4N), and it lacks a measurable DOM footprint, preventing a true Effective Annual Rent calculation.

• Formula: Effective Annual Rent = Achieved Rent × (365 − Rental DOM) ÷ 365.

• Recorded Baseline: Unit 4N (2BR) achieved $3,000/mo ($32/SF annually) in January 2021.

B. Rent Appreciation Insufficient data exists to map precise rental growth. The single baseline yields a relatively low nominal $32/SF for a 2BR footprint, indicating that while the sales market is premium, rent top-line performance may lag comparable luxury assets.

6. B³ SCORING SYSTEM (0–100)

• Liquidity Score: 85

  • Speed: Excellent. Normalized median resale DOM of 41 days for the core 2BR inventory, processing highly efficiently.

  • Consistency: High. Broad market participation across standardized 2BR lines.

• Rent Capture Score: 50

  • Efficiency: Poor to Moderate. Limited data yields a low $32/SF nominal baseline.

  • Absorption: Indeterminate due to unlisted DOMs on rentals.

• Appreciation Score: 85

  • Durability: Outstanding structural compounding from original baselines and robust late-cycle capital preservation matching the NYXRCSA index stability.

7. COMPOSITE SCORE & CLASSIFICATION

Composite Score = (85 × 0.35) + (50 × 0.30) + (85 × 0.35) = 74.50. Category Assignment: Hybrid (Leaning Core/Defensive). The asset securely acts as a highly liquid, wealth-preserving store of value, successfully compensating for limited top-line rental data via profound appreciation durability.

8. TRANSACTION EXAMPLES (REQUIRED)

Resale Appreciation (Structural Compounding):

1. Unit 3F (2BR): Apr 2005 Sponsor Trade ($253,500 at $278/SF) → Nov 2024 Resale ($1,150,000 at $1,048/SF with 85 DOM). Held 19.6 years. +353% change (CAGR ~7.9%). Driver: Sponsor price normalization + Market regime timing.

2. Unit 4L (2BR): Mar 2005 Sponsor Trade ($778,961 at $259/SF) → Jun 2018 Resale ($1,150,000 at $1,207/SF with 31 DOM). Held 13.3 years. +366% change (CAGR ~12.2%). Driver: Sponsor price normalization + Market regime timing.

3. Unit 4K (2BR): Mar 2005 Sponsor Trade ($385,320 at $413/SF) → Sep 2022 Resale ($1,295,000 at $1,115/SF with 56 DOM). Held 17.5 years. +169% change (CAGR ~5.8%). Driver: Sponsor price normalization + Market regime timing.

4. Unit 3J (2BR): Mar 2005 Sponsor Trade ($365,040 at $388/SF) → Jul 2022 Resale ($1,250,000 at $1,053/SF with 193 DOM). Held 17.3 years. +171% change (CAGR ~5.9%). Driver: Sponsor price normalization + Market regime timing + Liquidity shift (DOM change).

Resale Flat Normalization (Late Cycle Baseline Shifts): (Note: Because violent equity destruction is completely absent, the following line-pair comparisons map flat baseline retention and slight localized corrections against peak clears).

1. 2BR Line Normalization: Unit 3J Peak Trade (Dec 2019 at $1,118/SF with 28 DOM) vs Unit 3J Late-Cycle Resale (Jul 2022 at $1,053/SF with 193 DOM). -5.8% baseline shift. Driver: Market regime timing + Liquidity shift (DOM change).

2. 2BR Line Normalization: Unit 4L Peak Trade (Jun 2018 at $1,207/SF) vs Unit 4L Late-Cycle Resale (Sep 2022 at $1,170/SF with 32 DOM). -3.0% baseline shift. Driver: Market regime timing.

3. 2BR Line Normalization: Unit 4K Peak Trade (Sep 2022 at $1,115/SF with 56 DOM) vs Unit 3F Late-Cycle Resale (Nov 2024 at $1,048/SF with 85 DOM). -6.0% baseline shift. Driver: Market regime timing + Unit size / unit mix imbalance.

9. RISKS & RED FLAGS

• Oversized Layout Illiquidity: While the 2BR units fly off the market, massive combined/townhouse layouts (e.g., 1A at 3131 SF) are extremely difficult to offload, carrying brutal DOM drag (up to 322 days) and massive pricing discounts relative to the building's PPSF average.

• Yield Transparency: With nearly zero recorded rental history, investors buying specifically for cash-flow yield are flying blind; the single recorded baseline of $32/SF in 2021 suggests underperformance on pure nominal rent generation.

• Avoid: Purchasing oversized 3BR or Townhouse units under the assumption of identical liquidity to the 2BR core. The heavy holding cost of time will neutralize your capital efficiency.

10. EXECUTIVE SUMMARY

Brownstone Lane (309 West 118th Street) is a highly functional, Hybrid postwar condo that generated massive wealth for its initial 2005 sponsor buyers and securely maintained a stable pricing plateau through subsequent market cycles. Driven by a 2BR-dominant unit mix that clears the sales market exceptionally fast (41-day median), the building completely sidesteps the structural illiquidity common in Upper Manhattan. Despite a lack of transparent rental yield data, the asset successfully tracks the long-term compounding growth of the NYXRCSA benchmark, pushing from $300/SF lows to an extremely defensive $1,050–$1,200/SF plateau. Investors should view the standard 2BR layouts as premium, low-friction vehicles for protecting long-term capital, while strictly avoiding the illiquid massive townhouse footprints.

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