By DON FENLEY

The Tri-Cities housing market continues to evolve, and one of the biggest questions animating buyers, sellers, and agents is simple: Are higher housing costs being driven mainly by the influx of new residents?

A new look across the Tri-Cities region suggests the answer depends heavily on where you live.

While new residents are a major force behind rising home prices in the Tri-Cities, the effect is not uniform. The region’s housing market is being reshaped by a combination of migration, low vacancy, and years of under-building. Understanding the regional and individual county market situations with a Migration Pressure Index score helps explain why affordability is tightening and where the pressure is coming from.

–  The region is a split market.
Washington, Sullivan, and Unicoi counties are experiencing “migration-led pricing.” Greene, Carter, Hawkins, and Johnson are in a transitional zone where migration and supply constraints share the load.

–  Prices won’t stabilize without more inventory.
Migration alone isn’t the problem. The issue is that new residents are arriving faster than builders can deliver new homes. Even modest increases in supply reduce friction.

–  Local buyers need strategic guidance.
Demographic pressure is strongest in the counties where first-time and move-up buyers already face tight options.

–  Consumers should understand their county’s index score.
High-pressure counties can support stronger pricing. Moderate-pressure counties reward realistic list strategies and updated conditions.

–  Policymakers should view migration as an opportunity, not a threat.
More residents expand the labor pool, tax base, and long-term economic potential – if housing supply keeps pace.

The Migration Pressure Index is based on NETAR’s latest months-of-inventory readings, CoreData’s and Census regional migration trends, regional and county incomes, statewide and local affordability data. It measures how much upward pressure on home prices can reasonably be attributed to newcomers. It also includes the effect of local demand, tight supply, and long-running under-building. Higher-ranking scores mean migration is the primary force behind higher prices.

REGIONAL VIEW

Migration + Tight Supply

Across the region, no county is operating with a balanced six-month supply. Instead, counties remain clustered between 1.9 and 5.3 months.  Washington and Sullivan routinely post the tightest inventory. That matters because statewide and local data confirm Tennessee’s current population growth is overwhelmingly driven by new inbound residents, many arriving from higher-income, higher-price metros. When a region adds households faster than it adds homes, prices rise.

But that’s not the entire story. Affordability also reflects local incomes, long-term under-building, investor activity, and the rising cost of new construction. The Tri-Cities Index captures that mix and shows how much of each county’s pricing tension is tied directly to new residents.

COUNTY-LEVEL VIEW

Here are the individual county index scores and a capsule explanation of their effect:

WASHINGTON Co. (TN) – 73 High Pressure

Washington County consistently posts the tightest inventory in the region. Strong in-migration, a large remote-worker population, and Johnson City’s role as the region’s economic magnet combine to keep demand elevated. Prices have outpaced incomes for several years, and new construction has not fully bridged the gap.

What it means: Migration is a primary driver of today’s higher costs. Even modest supply relief will be quickly absorbed.

SULLIVAN Co. –  76 High Pressure

Sullivan’s pricing pressure is shaped by both in-migration and local turnover between Kingsport, Bristol, and nearby Virginia localities. Vacancy rates are low, inventory is tight, and the county continues to attract households priced out of larger metros. Price-to-income ratios have moved sharply higher since 2020.

What it means: Migration is doing a lot of the heavy lifting. Without new supply, affordability will continue to erode.

UNICOI Co. – 55 Moderate Pressure

Unicoi has transitioned into a spillover destination for households unable to find inventory in Washington County. Despite its smaller market, demand regularly outruns supply, and days-on-market remain short. Newer subdivisions have been absorbed quickly.

What it means: Migration is a major force, though still paired with structural under-building.

CARTER Co. – 58 Moderate High Pressure

Carter’s inventory levels remain well below balanced conditions, and the Elizabethton-to-Johnson City corridor has become an active migration path. Still, local income constraints and slower new-construction pipelines also shape affordability.

What it means: Migration matters, but so do supply and wage dynamics.

GREENE Co. – 60 Moderate High Pressure

Greene has seen a shift from soft out-migration to modest net in-migration since 2020. Inventory is tighter than buyers often expect, but not nearly as constrained as Washington or Sullivan. Prices have risen faster than incomes, echoing statewide trends, but the county remains relatively affordable.

What it means: Migration adds pressure, but higher prices also reflect long-term building shortfalls.

HAWKINS Co. – 52 Moderate Pressure

Migration is present, but supply and incomes do more of the work

Hawkins mirrors Greene in inventory levels, but with longer days-on-market and a softer demand profile. Price growth has been steady but less migration-driven than neighboring counties.

What it means: Under-building and local economic conditions still outweigh migration in shaping affordability.

JOHNSON Co. – 47 Lower Moderate Pressure

Despite strong net in-migration relative to its population size, Johnson County maintains one of the Tri-Cities’ highest months of inventory readings. Cost-burden rates remain lower than most Tennessee counties, and pricing tends to move more slowly.

WASHINGTON Co. VA – 71 High Pressure

Washington County has become one of the region’s most migration-sensitive markets. Newcomers arrive with stronger incomes, higher cash-buyer shares, and preferences that cluster in the $250K–$399K home price band. With new construction limited and resale inventory thin, the county reacts quickly to demand spikes.

SCOTT Co. – 48 Moderate Pressure

Much of Scott’s buyer inflow is connected to Kingsport commuting or retiree migration. Both groups  place steady but not disruptive demand on inventory. Prices rise gradually, supply remains more flexible, and the market avoids the sharper swings seen across the state line.

Categories: TRENDS