The NAHB housing index rose to 37 in May, but elevated Mortgage rates, weak affordability, and constrained housing Supply continue to pressure the US housing market and homebuilder sentiment.

Key Highlights

  • The NAHB housing Market Index came in at 37 for May, beating the 34 consensus estimate but remaining deeply depressed by historical standards.
  • A reading of 37 signifies that more homebuilders view current market conditions as poor rather than good, a characterisation that has persisted for over a year.
  • The elevated mortgage rate environment, a direct consequence of the Federal Reserve's response to energy-driven Inflation, is the primary constraint on housing market recovery.
  • New home sales have been supported by the lack of existing home supply, as homeowners with low-rate mortgages are unwilling to sell and take on new mortgages at current rates.
  • The construction cost environment, affected by elevated energy and materials prices from the Iran conflict, adds supply-side pressure to the Demand constraints already weighing on the market.

What NAHB at 37 Actually Means

The National Association of Home Builders' Housing Market Index is a sentiment survey of builders regarding current and expected sales conditions and traffic from prospective buyers. A reading above 50 indicates more builders view conditions as good than poor; a reading of 37 means a significant majority see conditions as poor. The May reading of 37 beat the consensus estimate of 34, which technically means the market surprised to the upside, but the framing of a miss-versus-beat in this context is misleading: whether the index reads 34 or 37, the fundamental characterisation is the same: homebuilder sentiment is significantly negative, and the housing market is operating well below its potential.

The Lock-In Effect and Existing Home Supply

The paradox of the current US housing market is that the segment with the most supply, new construction, is struggling with weak demand, while the segment with the most demand, existing homes, has almost no supply. Homeowners who locked in 3% mortgages in 2020 and 2021 have a powerful financial incentive not to sell their homes and take on new mortgages at 7% or above: the monthly payment difference on a typical home price can exceed ,1,000 per month. This lock-in effect has created an effective freeze in existing home transactions, pushing demand toward new construction, but not at a pace sufficient to sustain builder sentiment above the breakeven 50 level.

The Rate-Price Tension

The US housing market faces a fundamental tension between elevated mortgage rates and home prices that have not corrected sufficiently to restore affordability. The affordability calculation requires either prices to fall, rates to fall, or income to rise enough to restore the income-to-payment ratio that makes homeownership accessible to the first-time buyer population that drives new household formation. None of these three adjustments is occurring rapidly: prices are sticky downward, rates remain elevated due to the Fed's inflation-fighting mandate, and income growth has been positive but insufficient to close the affordability gap at current price and rate levels.

Construction Costs and the Supply Constraint

Homebuilders face a cost environment that is not only suppressing demand through high mortgage rates but also increasing the cost of the product they are trying to sell. Building materials with significant energy intensity, including lumber processing, concrete, steel, and glass, have seen cost inflation that reflects both the Iran conflict's energy price impact and the residual supply chain disruptions that elevated goods prices across many categories. The result is that builders face squeezed margins: the price at which they can sell homes to cash-constrained buyers at current mortgage rates leaves insufficient profit Margin to justify construction at the rate required to address the housing supply Deficit.

The Regional Variation and Its Meaning

The national NAHB index conceals significant regional variation in housing market conditions that is analytically important. Sun Belt markets including Texas, Florida, and the Southeast have been more resilient than coastal markets, reflecting the continued demographic migration away from expensive coastal cities toward more affordable interior markets. However, even the Sun Belt's relative resilience is fading as its price appreciation of the past few years has eroded the affordability advantage that drove the initial migration, and as the elevated mortgage rate environment affects all markets uniformly. The national reading of 37 masks regional readings ranging from the low 20s in markets facing the most severe affordability and cost challenges to the low 50s in the most resilient markets.