Knox County sits at a 3.63% cap rate on a median-priced asset of $376,196, with gross rent of $1,750 per month producing a rent-to-price ratio of 5.58%. Neither number is impressive for a cash-flow buyer. The model underwrite, using a 6.85% 30-year rate with 20% down, produces a monthly mortgage of $1,972 against estimated total expenses of $613, landing at negative $834 per month in cash flow and a cash-on-cash return of negative 11.57%. Year-over-year home price appreciation of 0.76% offers no near-term offset. Knox scores 54 on cash flow and 58 on appreciation out of 100, which tells you plainly where the market leans: it is not a cash-flow market at current prices and rates, and its appreciation story, while present, is modest rather than aggressive. This places Knox in an awkward middle zone, not cheap enough to pencil as a cash-flow play and not appreciating fast enough to justify bleeding significant monthly losses on a speculative hold.
The investor profile this market suits today is narrow. An appreciation buyer with a long time horizon, low leverage, or seller financing that materially reduces the debt service load could make a case for Knox, given a population of 481,406 and a median household income of $68,580 supporting stable occupancy in a mid-sized regional market. A value-add operator buying below median, forcing equity through renovation, and stabilizing rents above $1,750 has a more defensible thesis than a buyer paying ask on a turnkey asset. The affordability index of 48 and the overall score of 53 at the 34th national percentile out of 1,000 counties suggest Knox is not a top-tier opportunity on current metrics, but it is also not a market to dismiss outright if the purchase price can be meaningfully compressed.
Knox County is anchored by the University of Tennessee, which generates consistent rental demand from students, faculty, and university-adjacent employment, and by Oak Ridge National Laboratory nearby, which attracts a skilled professional workforce that typically translates into stable, creditworthy tenants. These anchors underpin a rental market that is unlikely to see sharp demand collapses, but they also attract enough investor capital to keep prices elevated relative to rents, which is precisely why the cap rate is sitting at 3.63%.
On carrying costs, the combined monthly tax and insurance burden runs $335, embedded in the $613 total expense estimate. At a state-average effective property tax rate of 0.71%, Tennessee reads as favorable on taxes, and the data flags this as "normal" rather than a stress item. That said, this is a state-average estimate from Tax Foundation 2024 data, and actual rates at the county and township level in Knox can differ, so verify the specific parcel rate before closing. Insurance at 0.36% annually adds $113 per month on a $376,196 asset. Neither line item is the problem in this underwrite; the mortgage at $1,972 is the problem. Any path to positive cash flow runs through the purchase price, not the carry costs.
The primary risk in Knox is the price-to-rent compression that has already occurred. At 5.58% gross yield, there is very little margin for vacancy, capex surprises, or property management fees before cash flow deteriorates further. The affordability index of 48 signals that a meaningful share of the renter pool may be stretched, which can create collection friction even when occupancy looks stable on paper. Concentration risk is real if your strategy is limited to Knoxville proper, as the market is a single metro economy, and any significant contraction at the university or in the professional services sector would hit renter demand simultaneously across your portfolio.
Comparing neighbors, Washington County is the most interesting alternative in this dataset. At a median home price of $296,677 and median rent of $1,567, Washington County's rent-to-price ratio is 6.34%, nearly 76 basis points higher than Knox, at an overall score of 54 versus Knox's 53. That spread matters: a buyer who cannot negotiate Knox below its current median gets meaningfully better yield per dollar deployed in Johnson City. Blount County, adjacent to Knox at a median of $380,434 and a nearly identical rent-to-price ratio of 5.41%, offers no pricing advantage and a lower score of 52. Sequatchie and Grundy counties are cheaper in absolute terms but lack the rental data to evaluate yield, and Van Buren County at $226,333 and a score of 55 may interest a deep-value buyer, though without rent data the yield story is unverifiable. Choose Knox over its neighbors if the university and Oak Ridge demand anchors are central to your thesis and you can execute a below-median acquisition; choose Washington County if maximizing gross yield on a stabilized asset is the priority.
| Scenario | Purchase price | Monthly cash flow | Cap rate | Cash-on-cash |
|---|---|---|---|---|
75% of median value-add or distressed | $282,147 | -$341/mo | 4.8% | -6.3% |
Median typical MLS deal | $376,196 | -$834/mo | 3.6% | -11.6% |
125% of median newer / premium | $470,245 | -$1,327/mo | 2.9% | -14.7% |
Historical data from Zillow ZHVI/ZORI
* Based on county median values. 35% expenses include taxes, insurance, maintenance, vacancy, and property management. Actual results vary by property.
Based on 5.58% rent-to-price ratio. Higher ratios indicate stronger cash flow potential.
Based on 0.8% YoY price growth. Moderate growth (3-8%) scores highest.
Population data not available.
Price-to-income ratio of 5.5x. Lower ratios indicate more affordable markets.
Scores are calculated using real Zillow home value and rent data, Census population data, and economic indicators. The weighted average produces the overall investment score. Markets with missing rent data use estimated values based on regional averages.
Knox County in Tennessee scores 53/100, ranking #497 of 1,000 US counties (top 66%). At 20% down and current rates, a median-priced rental loses about $834/month; the 5.58% gross rent-to-price ratio doesn't survive debt service. The thesis here is appreciation, value-add, house hacking, or all-cash.
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