Fairfax County, VA Cap Rates by Neighborhood

County-Wide Gross Yield: The Starting Point and Its Limits

At a $779,439 median home price and $2,542/month median rent, Fairfax County's gross yield computes to 3.91% annually. That number is real, but it describes an average across a county of 1.145 million people, eight Silver Line stations, and neighborhoods that diverged sharply in 2025. Fairfax City posted an 8.6% median price gain to $825,000 while Great Falls fell 6.5% and Chantilly dropped 3.4% in the same period. A 3.91% headline yield averaged across that range obscures whether you are buying into a compressing sub-market or a decompressing one.

The price-to-rent ratio of 25.6x is the more useful summary statistic. At that multiple, cash flow is thin before any operating expenses touch the gross yield. Property taxes, insurance, and vacancy bring net operating income well below what the gross number implies. The spread between sub-markets is where the actual investment decision lives.

Neighborhood and Sub-Market Breakdown

Transit Corridor Nodes: Tysons, Reston, Herndon

Silver Line Phase 2 opened November 2022, adding Reston Town Center, Herndon, and the Innovation Center stations to the existing Tysons and Wiehle-Reston East stops. New multifamily high-rises near Spring Hill Metro (Piazza at Tysons) and Reston Town Center represent the county's most active residential development corridors. These properties command premium rents, attract high-income WMATA commuters, and trade at price points that compress gross yields further below the 3.91% county average.

Investors in this corridor are explicitly betting on appreciation and rent escalation rather than current income. The positive case is real: Tysons and Reston sit at the intersection of Silver Line access, data center zoning clarity near Dulles, and proximity to employers including Capital One's McLean headquarters, Booz Allen Hamilton, General Dynamics, and Northrop Grumman. The SPA expansion announced in September 2025 ($46.9 million, 714 jobs over five years) adds to that demand base. Net cap rates on newer multifamily product in these nodes likely run 3.0%–3.5% after taxes and insurance, with the thesis built on rent growth that has averaged 40% since 2015.

Fairfax City and Walkable Inner Suburbs

Fairfax City's 8.6% price appreciation to $825,000 in 2025 reflects buyer demand for walkable neighborhoods with employment proximity. At a $825,000 acquisition price and the county's $2,542 median rent (which likely understates achievable rents in this price tier), gross yield compresses further. An 825,000-dollar property generating market rent near the county median implies a gross yield below 3.7%. The city's price outperformance relative to the county average signals buyers are paying up for location quality, which erodes current yield in favor of capital preservation and appreciation.

Outer Suburbs: Chantilly, Great Falls, Lorton

Chantilly (-3.4% in 2025), Great Falls (-6.5%), and Lorton (-2.1%) saw price declines, indicating buyer resistance to car-dependent suburban pricing at current mortgage rates. From a cap rate perspective, price softness in these sub-markets mechanically expands gross yield relative to the county average. A property that declined 6.5% in Great Falls while rents held stable sees its gross yield move toward 4.1%–4.3% on the new lower price. The problem is structural: these are less transit-connected sub-markets in a county where transit access is increasingly the primary determinant of rent resilience. Investors must weigh yield expansion against the risk of continued price softness if buyer preferences continue shifting toward connected corridors.

Richmond Highway BRT Corridor

The Richmond Highway Bus Rapid Transit investment represents an emerging opportunity where values have not yet repriced for transit access. Properties along this corridor today likely trade closer to the county median or below it, offering gross yields near 3.9%–4.1%. If BRT development follows the Silver Line pattern at Tysons and Reston, values in this corridor will compress toward transit-node pricing as completion approaches. This is a speculative thesis with execution risk, but the public investment signals county commitment to densification along that spine.

Neighborhood Comparison

Gross yield estimates for non-Fairfax-City sub-markets are derived from applying the county-wide $2,542 median rent to sub-market price levels implied by 2025 price change data. Net yields will be lower after taxes and insurance.

Property Tax Impact on Net Cap Rates

Fairfax County's FY2026 real estate tax rate is $1.1225 per $100 of assessed value, with annual reassessments at 100% of fair market value. On a $779,439 purchase price, the annual property tax bill runs about $8,750. Against annual gross rent of $30,504 (12 x $2,542), that tax bill alone consumes 28.7% of gross income before any other operating expense.

The compounding problem is pace. Countywide residential assessments rose 6.65% in 2025 and 3.99% in 2026. Modeling 4%–7% annual assessment growth over a five-year hold, the tax bill on a property assessed today at $779,439 could reach $10,500–$11,500 by year five. Each dollar of assessment growth translates immediately into a higher tax bill because the county reassesses annually with no lag and no phase-in.

A rough net cap rate estimate on the county median property: gross yield of 3.91%, less property tax drag of about 1.1%, leaves 2.8% before insurance, maintenance, and vacancy. Investors underwriting to a 4%+ net cap rate in this market need either below-median acquisition prices (outer suburbs with softening values) or above-median rents (Silver Line corridor multifamily).

Flood Risk and Insurance Adjustment

FEMA's revised Preliminary Flood Insurance Rate Maps for Fairfax County are in a final review phase, with resolution expected by Fall 2026 and county adoption required within six months thereafter. Properties near floodplains face potential reclassification into higher-risk zones that could increase mandatory flood insurance costs after closing, not before it. This is a live underwriting risk for 2026 acquisitions.

Fairfax County's participation in FEMA's Community Rating System since 1993 provides discounted flood insurance premiums for eligible properties, partially offsetting risk. The May 2025 Repetitive Loss Area Analysis report adds a disclosure dimension: flagged parcels will carry mandatory disclosure requirements that affect resale liquidity and insurability.

For properties not in a floodplain, this is background noise. For value-add acquisitions near creeks, drainage corridors, or properties the RLAA identifies, the insurance adjustment could subtract 0.2%–0.5% from net yield and introduce entitlement risk on any renovation requiring county approval.

Cap Rate Outlook

The structural setup favors net yield stability over the next two to three years, without offering expansion to investors who buy at current prices. Here is the reasoning by factor:

Rent growth: The county officially needs 15,000 additional units just to reach a healthy 5% vacancy rate, and the April 2026 Housing Needs Assessment projects a deficit of 41,000–95,000 homes by 2035. Affordable unit production ran 1,298 units from 2020–2024 against a goal of 10,000 by 2034. That gap means market-rate rents face sustained upward pressure. A workforce earning a $122,632 median wage in Professional and Technical Services supports the $2,542 county median rent with room to grow.

Price trajectory: The NVAR 2026 forecast projects 1.9% single-family price growth with inventory up 35.8%. Months of supply remain at 1.85 months. Prices are not falling, but at 1.9% growth versus 40% rent growth since 2015, rents have outpaced prices over the cycle. That dynamic argues for mild gross yield expansion at the county level over time, not further compression.

Tax drag: Assessment growth running at 4%–7% annually is the primary risk to net cap rate stability. Investors who do not underwrite aggressive tax escalation will see their net yields erode as the county captures assessed-value gains in real time.

Transit-adjacent premiums: Silver Line sub-markets at Tysons and Reston will continue to compress on gross yield as they attract capital and new residents. The Richmond Highway BRT corridor offers the best near-term opportunity for investors willing to underwrite transit completion risk before the market reprices for access.

Model your specific deal with our investment property calculator to stress-test these tax, rent-growth, and insurance assumptions against your target sub-market and hold period.