When mortgage rates hover near 7% and home prices remain stubbornly high, the number of borrowers taking on substantial debt grows accordingly. Experian data from June 2024 reveals that 47 cities across the United States now carry average mortgage balances exceeding $1 million, up sharply from 26 cities in 2023. This shift reflects broader trends in housing affordability and the financial demands of purchasing property in premium markets. For builders and buyers alike, understanding these dynamics starts with knowing how a construction mortgage differs from standard home loans and how regional factors drive borrowing costs to these levels. Million-dollar mortgages were once a rarity concentrated in a handful of ultra-wealthy enclaves. The expansion to 47 cities signals that high-balance mortgages have become a standard feature of the housing market in desirable regions across the country.
How the Million-Dollar Mortgage List Grew in 2024
The jump from 26 cities in 2023 to 47 in 2024 signals a rapid expansion of high-balance mortgage markets. This 80% increase happened despite home sales remaining below pandemic-era peaks. New states joined the list for the first time, including Colorado, Connecticut, Massachusetts, and Texas. These additions suggest that million-dollar mortgages are spreading beyond their traditional California stronghold into regions where tech employment, professional services income, and limited housing supply converge.
California suburbs and exurbs around San Francisco and Los Angeles still account for the majority of communities where these mortgages are common. The Hamptons on Long Island, New York, contributed four separate communities to the list. Northeastern newcomers include Wellesley Hills, Massachusetts, and Old Greenwich, Connecticut. Cities experiencing this kind of property value growth face increasing pressure on roads, utilities, and public services. Sound urban infrastructure planning becomes essential as rising land costs concentrate development in already built-up areas that must accommodate more residents within the same geographic footprint.
California Still Dominates the List
Los Angeles suburbs such as Hidden Hills and Atherton continue to post some of the highest mortgage balances in the nation. San Francisco Bay Area communities including Palo Alto, Hillsborough, and Los Altos also rank prominently. These areas combine limited housing supply with high demand from technology-sector employment. In total, more than 30 of the 47 cities on the list are in California. Many of these cities also have some of the strictest zoning and permitting requirements in the country, which constrains new construction and keeps existing home values elevated.
New England Enters the High-Balance Club
Massachusetts and Connecticut each contributed communities where average mortgage balances now exceed $1 million. Wellesley Hills, located west of Boston, and Old Greenwich on Connecticut’s Gold Coast represent the northeastern expansion of this trend. These areas combine historic housing stock with limited new construction, pushing prices upward. Proximity to financial centers in Boston and New York drives demand from professionals who can afford premium pricing for shorter commutes and top-ranked school districts.
Geographic Distribution of High-Balance Mortgages
While California dominates the list, the geographic spread has widened meaningfully. A state-by-state breakdown shows where million-dollar mortgages have taken hold and how the concentration shifted from the previous year:
| State | Cities with $1M+ Avg Mortgage | Notable New Entries (2024) |
|---|---|---|
| California | 33 | Atherton, Hidden Hills |
| New York | 4 | Hamptons communities |
| Massachusetts | 3 | Wellesley Hills |
| Connecticut | 2 | Old Greenwich |
| Colorado | 2 | Boulder area communities |
| Texas | 1 | Westlake area (Dallas-Fort Worth) |
| Florida | 1 | Bal Harbour (Miami Beach) |
| Hawaii | 1 | Honolulu area communities |
For construction professionals, these cities represent high-value markets with unique cost pressures. Four US cities rank among the world’s most expensive cities for construction, and these locations overlap significantly with high-mortgage markets. Building costs and property values tend to rise together in the same metropolitan areas, creating a feedback loop where expensive construction pushes home prices higher, and high home prices justify expensive construction.
What the Geographic Spread Means for Builders
The expansion into new states indicates that million-dollar mortgages are becoming a broader national trend rather than a California-specific phenomenon. Builders in Colorado, Texas, and the Northeast must account for higher entry points in these markets when planning new developments. Land acquisition costs, permit fees, and labor rates all scale with local property values. A builder in Boulder, Colorado, faces different cost structures than one in suburban Dallas, even though both markets now appear on the million-dollar mortgage list.
The $2 Million Mortgage Cities
Three cities stand apart with average mortgage balances exceeding $2 million: Bal Harbour, Florida; Atherton, California; and Hidden Hills, California. These communities represent the extreme end of the mortgage spectrum where luxury home prices push borrowing to extraordinary levels.
Bal Harbour, a village on Miami Beach, offers oceanfront properties that command premium prices. Atherton, in Silicon Valley, has long been one of the most expensive zip codes in the United States. Hidden Hills, located in Los Angeles County, is a gated community known for large estates. In markets like these, buyers often finance custom home construction rather than purchasing existing properties, making it important to understand what is construction mortgage financing and how construction-to-permanent loans work for building luxury residences from the ground up.
The $2 million threshold reflects both the cost of land and the expense of building high-end custom homes in exclusive neighborhoods. Lot prices alone in these communities can exceed $1 million, meaning the structure cost gets added on top of an already substantial land investment. Building permit fees, impact fees, and design review costs in these municipalities add tens of thousands of dollars to every project.
Factors Driving Million-Dollar Mortgage Balances
Multiple economic forces converged to push average mortgage balances past $1 million in 47 cities. These factors affect both the number of high-balance mortgages and the average loan size in each market. Understanding these drivers helps builders and buyers anticipate where the trend may spread next.
- Median existing home sale prices reached a record $426,900 in June 2024, according to the National Association of Realtors, establishing a higher baseline for all mortgage balances
- Mortgage rates near 7% mean higher monthly payments on the same loan amount, increasing the total cost of borrowing and reducing the pool of qualified buyers
- Limited housing inventory in desirable urban and suburban areas pushes prices upward through basic supply and demand mechanics
- Remote work flexibility allows buyers to seek homes in expensive but desirable communities farther from traditional city centers
- All-cash transactions hit a decade high of 32% in early 2024, meaning financed purchases are more concentrated in higher price brackets where cash buyers are less active
The California average mortgage balance of $443,000 leads all states, though it remains well below the $1 million threshold. Washington, D.C., posts an even higher average of $506,600. California also has the highest percentage of mortgages with balances exceeding $1 million, at 7.4% of all mortgages in the state. No state approaches a statewide average of $1 million, but the concentration of high-balance mortgages in specific cities creates the appearance of a broader trend.
Construction technology also influences home values in these premium markets. Advanced materials that improve air quality and durability add to property appeal. Smog-eating concrete buildings represent one example of how innovative building materials can increase both construction costs and property values in environmentally conscious urban markets where buyers are willing to pay premiums for sustainable features.
The Role of All-Cash Purchases
According to the National Association of Realtors, 32% of home sales were all-cash transactions in early 2024, a decade high. This means only about two-thirds of home sales involved mortgage financing at all. The high proportion of cash purchases suggests that actual home prices in many markets are even higher than mortgage data alone would indicate. Buyers who do finance tend to purchase in higher-cost segments where all-cash buyers are less prevalent, which can push average mortgage balances upward in certain communities. Institutional investors and wealthy individuals making cash offers often target mid-range properties, leaving financed buyers competing for the higher end of the market.
This trend matters for builders because it affects the mix of buyers in new developments. Projects targeting owner-occupants who need financing may face different demand patterns than those catering to all-cash investors. Builders must decide which buyer segment to prioritize when planning new communities in million-dollar mortgage markets.
What Million-Dollar Mortgages Mean for Home Builders and Buyers
For home builders, the expansion of million-dollar mortgage markets signals where demand remains strongest despite elevated interest rates. These cities share several characteristics that make them both attractive and challenging for new development:
- Limited developable land that restricts new supply and drives up lot prices
- High construction costs driven by labor shortages and expensive materials
- Stringent permitting processes that extend project timelines by months or years
- Demographics with above-average household income capable of supporting premium pricing
- Established neighborhoods with strong schools, low crime rates, and desirable amenities
The relationship between mortgage rates and broader housing markets continues to shift in ways that directly affect construction feasibility. Builders tracking market conditions need to understand how rising mortgage rates reshaping the refinance market affect buyer qualification and project feasibility in premium price tiers. Higher rates reduce purchasing power, which can compress demand at the upper end even as list prices remain elevated.
Planning for Future Developments in High-Cost Markets
Builders entering million-dollar mortgage markets need to budget for extended approval timelines, higher material costs, and labor shortages that are more acute in high-cost areas. The demand for luxury and custom homes in these markets remains steady, but profit margins depend on accurate cost forecasting. Smaller builders may find opportunities in infill development and renovation projects rather than ground-up construction on expensive lots. Teardown and rebuild projects in established neighborhoods offer a path into these markets without competing for scarce raw land.
The concentration of high-balance mortgages in specific cities offers builders a clear map of where premium housing demand outstrips supply. These are also the communities where walkable neighborhood design adds significant property value. Homes in pedestrian-friendly areas command higher prices, a factor that contributes to the million-dollar mortgage phenomenon in dense, amenity-rich neighborhoods. Research on walkable cities in the US shows that properties within walking distance of transit, shopping, and services consistently sell at premiums that push mortgage balances higher in the country’s most desirable urban and suburban locations.