Cobb County, GA Cap Rates by Neighborhood

County-Wide Gross Yield: The Number That Misleads

At a 4.90% gross yield on a $429,051 median home, Cobb County sits well below the 6–7% threshold most single-family rental investors require before even running vacancy and expense assumptions. The math is straightforward: $429,051 × 4.90% = $21,023 in annual gross rent, or $1,752 per month, which aligns with the Zillow ZORI. That sounds tight because it is.

The county-wide figure, however, obscures a spread that is wide enough to matter. A 4-bedroom home in Northeast Cobb commands a different rent-to-price dynamic than a transitional corridor property in Mableton or a small multifamily site near the Cobb-Fulton border. The aggregate yield is a starting point, not a destination.

Net Cap Rate After Property Tax

Before comparing submarkets, strip out property tax. Cobb's effective rate runs at 0.69% of assessed value.

On a $429,051 acquisition price:

• Annual gross rent: $21,023
• Property tax: $429,051 × 0.69% = $2,960
• Gross rent after tax only: $18,063, or a tax-adjusted yield of 4.21%

Factor in insurance, vacancy at 7–8%, and maintenance reserves of 10% of rent, and the all-in net operating income on a median Cobb property lands closer to 2.8–3.2% net cap rate. That is the real number investors underwrite.

The one mitigant: Cobb's 0.69% effective rate is 0.10 percentage points below the Georgia state average of 0.79%, and it compares favorably against neighboring Fulton County. On a $429,051 property, that 10 basis point difference saves about $429 annually in property taxes, a modest but real improvement to NOI.

Assessment growth is also slowing. The Cobb Board of Tax Assessors projected only 2% digest growth for 2025, after years where assessed values climbed sharply while millage stayed flat at 8.46 mills general fund and 2.99 mills fire. That earlier combination turned flat-rate promises into effective tax increases. The deceleration in 2025 reduces the probability of another sharp NOI squeeze for recently acquired properties.

Flood Insurance Adjustment

About 10% of Cobb County properties carry severe flood risk over a 30-year horizon, and the county ranks among Georgia's highest-risk counties for inland flooding alongside Fulton and Gwinnett. Cobb's CRS Class 7 NFIP rating provides a 15% discount on premiums for Special Flood Hazard Area properties, which trims the insurance line but does not eliminate the exposure.

For SFHA parcels, budget $800–$1,500 annually in NFIP premiums after the 15% discount, depending on structure age and elevation. On a $429,051 property already generating thin gross yields, a $1,200 flood insurance premium erodes another 28 basis points of gross yield, pulling the effective gross yield for flood-exposed properties below 4.60%.

Screen FEMA zone designations before closing on any Cobb property near the Chattahoochee tributaries, the South Cobb Drive corridor, or low-lying portions of the Smyrna and Mableton areas.

Submarket Analysis by Asset Segment

The brief does not supply rent data or price data with enough granularity to build a full neighborhood comparison table across three or more comparable points. What it does support is an asset-segment view.

Northeast Cobb: Family-Sized Single-Family Rentals

Northeast Cobb is the county's strongest demand pocket by the available data. In May 2025, 1,094 homes were listed there, inventory rose 18.9% month-over-month, and 4-bedroom home prices climbed 5.9% year-over-year. Critically, 45% of sold homes went over asking price in that period, a demand signal that is absent county-wide.

Larger single-family homes in this submarket likely carry higher absolute rents than the $1,752 county median, since the tenant profile skews toward professional households, anchored by the county's largest employment sector of 56,514 Professional, Scientific and Technical Services workers. Higher rents on 4-bedroom units can push gross yields modestly above the 4.90% county aggregate if purchase prices have not run as far ahead of rents as in the county's prestige corridors. That 5.9% price appreciation year-over-year in a county otherwise posting a -2.46% aggregate decline signals that Northeast Cobb is not discounting; investors who want a margin of safety on acquisition price will find less room here.

Best suited for: family-oriented long-term rentals, low-turnover tenants. Weakest for: value-add entry pricing.

Smyrna and Mableton: Transitional Corridor Plays

The Smyrna and Mableton submarkets sit along the Cobb-Fulton border, where gentrification pressure from Atlanta's northwest corridor is moving westward along the Bolton and Marietta Road corridors. These areas are described in the brief as active investment corridors, with about 350 acres of Cobb land sold to LLCs in 2024 alone.

Entry prices in transitional corridors typically run below the $429,051 county median, which means the same $1,752 median rent produces a higher gross yield at a lower basis. Investors acquiring at $350,000–$380,000 with rents in the $1,700–$1,800 range approach 5.5–6.0% gross yield territory, which begins to support a net cap rate above 3.5% after tax and basic expenses.

The risk here is the multi-family pipeline. Cobb has issued more multi-family permits since 2006 than any other metro Atlanta county, and a sustained supply addition along these corridors will cap rent growth. Investors should stress-test assumptions against flat rent for 24–36 months.

Multi-Family: The Supply Headwind

The county-wide multi-family pipeline is the largest in metro Atlanta since 2006, and about 350 acres sold to LLCs in 2024 signals more product coming. For existing apartment investors, this is a direct cap rate decompression risk through rent compression rather than price appreciation.

Units-under-contract fell 28.2% year-over-year in June 2026. Active listings have doubled since 2021, from about 17,000 to 35,000 county-wide. In an environment where demand-side volume is declining and supply is rising, NOI assumptions that rely on rent growth of more than 2–3% annually are aggressive for small multifamily acquisitions.

Cap Rate Compression vs. Decompression

Prices are falling faster than rents in Cobb right now. The ZHVI shows a -2.46% year-over-year price decline on the county median. Rents, per the ZORI, are holding, which means the gross yield of 4.90% has actually widened slightly from where it sat at peak pricing. That is a mild decompression signal for buyers entering now versus 2021–2022.

But the decompression is partial and slow. The median sales price per the Georgia MLS sat at $456,000 in June 2026 against a $429,051 ZHVI, and contracts are collapsing (-28.2% year-over-year). If prices soften further without a corresponding rent decline, yields inch up. However, the record multi-family supply pipeline creates downward pressure on rents simultaneously. Investors should not assume both a price decline and a rent increase; the more likely scenario is modest yield improvement through price softening, offset by modest rent growth suppression from new supply.

Cap Rate Outlook

The near-term trajectory in Cobb favors buyers over sellers, but it does not yet offer the yields that justify aggressive acquisition. Three factors will determine whether cap rates decompress further or restabilize:

Population growth trajectory. The Atlanta Regional Commission projects Cobb passing 1 million residents by 2050. A labor force of 422,588 growing at 1.2% annually, anchored by 3.2% unemployment and a concentration of high-wage professional sector workers, provides durable rental demand. Long-horizon investors have a real demographic tailwind.

The transit referendum outcome. The November 2024 Mobility SPLOST vote on $10.87 billion in BRT and ART investment across 73 miles of corridors, including Cobb Parkway, Windy Hill Road, and South Cobb Drive, will determine whether station-area value premiums materialize. If the referendum failed, the transit-oriented investment thesis along those corridors does not hold in its current form. If it passed or is reconsidered, properties within a half-mile of planned stops near Dunwoody, Arts Center, and H.E. Holmes MARTA connections become differentiated assets.

The ADU question. Cobb withdrew its ADU ordinance in November 2024 under public opposition. A revised proposal, if it ultimately passes with the owner-occupancy and short-term rental prohibitions intact from the 2024 draft, will add supply modestly but will not open up significant investor value-add capacity.

Cobb County sits in the 3.0–3.5% net cap rate range on typical acquisitions today, which prices it as a long-hold appreciation and demographic-growth play rather than a cash-flow market. Investors buying now should underwrite to flat rents for 18–24 months and price their exit on population growth and potential transit premium, not near-term income.

Model your specific deal with our investment property calculator to stress-test NOI against Cobb's actual tax rate, flood insurance exposure, and current rent assumptions before you commit.