The Seaport Multifamily Brief
Issue #1 | February 2026
Coastal Connecticut & Southern Rhode Island
Powered by CoStar Data and Seaport Due Diligence
Executive Summary:
Coastal multifamily markets remain structurally tight, but momentum is moderating. Leasing velocity has slowed, rent growth has flattened, and cap rates have stabilized. We have entered a Yield Discipline Phase.
Table of Contents
Washington County Market Snapshot
Transaction Intelligence
Interpretation – Beyond the Numbers
Coastal Regional View
Underwriting Reality Check™
Seaport Coastal MF Stability Index™
The Seaport Signal™
About This Series
Washington County, RI – Market Snapshot
According to CoStar Search Analytics (February 16, 2026):
- Inventory: 4,007 units
- Vacancy Rate: 2.5% (up from 2.1%)
- Market Rent/Unit: $1,984 (-0.7% YoY)
- Market Sale Price/Unit: $195,000
- Market Cap Rate: 7.1%
- 12-Month Absorption: 8 units
- Units Under Construction: 0
Source: CoStar Search Analytics – Washington County Multifamily Report, February 2026.
Transaction Intelligence
While market data provides directional clarity, closed transactions confirm how capital is actually behaving. Below are two prominent coastal trades that illustrate underwriting discipline and buyer psychology.
1 Harmony Street – Stonington Borough, CT
- Closed: $1,250,000
- Original Ask: $1,495,000
- Units: 4
- Days on Market: 140
- Buyer Profile: Cash
- Positioning: Hybrid short-term rental / long-term configuration
Seaport Takeaway: Despite premium Borough positioning, the asset required pricing correction before capital engaged decisively. This transaction reflects sensitivity to elevated initial pricing, increased scrutiny around short-term rental exposure, and cash dominance in micro-luxury coastal submarkets. This was not underwritten purely as a stabilized 4-family asset — it traded closer to a hospitality-adjacent hybrid product.
104 Second Street – Newport, RI
- Closed: $2,799,000
- Original Ask: $3,399,000
- Units: 2
- Price Per SF: ~$802
- Buyer Profile: Cash
Seaport Takeaway: This acquisition was lifestyle-driven rather than yield-driven. Although zoned as a two-family property, the asset had not operated as an income-producing rental. This illustrates a bifurcated market in Newport County where trophy coastal product attracts capital, cap rate is not always the primary driver, and cash remains dominant in prestige locations.
Interpretation – Beyond the Numbers
Data tells us the market is tight. Seaport due diligence tells us momentum is slowing.
Vacancy remains historically low, but absorption has fallen sharply. Rent growth has flattened. Cap rates are no longer compressing.
This is not distress. It is normalization.
Coastal Regional View
Using CoStar market data combined with Seaport underwriting analysis:
| Market | Supply Pressure | Yield Profile | Buyer Type |
|---|---|---|---|
| Washington County RI | Minimal | Stabilizing | Institutional + Private |
| Newport County RI | Very Limited | Compressed | Lifestyle + Capital Preservation |
| New London County CT | Limited | Higher Yield | Private / Workforce Investors |
| Middlesex County CT | Minimal | Mid-Range | Mixed |
Underwriting Reality Check™
At $195,000 per unit and a 7.1% cap rate, implied NOI per unit is approximately $13,845.
With market rent at $1,984 per month ($23,808 annually), expenses imply roughly 40–42% of gross income.
This reflects disciplined underwriting — not speculative pricing.
Seaport Coastal MF Stability Index™
Washington County Score: 74 / 100
Classification: Stable with Softening Momentum
This proprietary index blends CoStar vacancy, rent, cap rate, and absorption metrics with Seaport field-level due diligence and underwriting review.
The Seaport Signal™
The pandemic rent spike was the exception — not the rule.
We are now in a Yield Discipline Phase where disciplined underwriting matters more than rent optimism.
Buyers who rely only on historical growth may misprice risk. Buyers who combine data with due diligence will outperform.
About This Series
The Seaport Multifamily Brief is a biweekly research publication covering multifamily investment trends across Coastal Connecticut and Southern Rhode Island. Powered by CoStar Data and Seaport Due Diligence, each issue blends institutional-grade analytics with field-level underwriting insight. Published every other Wednesday.
Market data in this report is sourced from CoStar Search Analytics (February 2026 editions). Interpretation, underwriting analysis, and Stability Index scoring are proprietary to Seaport Commercial.
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