US builders slow down as 7.4% mortgages bite

The numbers. Seasonally adjusted, starts ran at a 1.221M annual pace in September, against 1.288M in August and 1.319M a year ago. Building permits ran at 1.4M, 0.2% below August and 3% below a year ago. Single-family permits were 845,000, down 4% on the month.

A caveat. This data is noisy. The Census Bureau itself says the 5.2% monthly drop comes with a margin of error of plus or minus 11.8%. So one month alone cannot prove building fell. The trend over several months matters more. Per NAHB, the builders' association, single-family starts are down 4% year to date.

Why. Per Freddie Mac, the 30-year mortgage held at 7.40% for a second week. A year ago it was 6.27%. Investing.com reports builders point to pricier materials and diesel and to unsold homes that hold back new projects.

What next. Completions ran at 1.192M in September, 14% below a year ago. If few homes get started now, even fewer new homes arrive in a year or two. That keeps prices up and makes affordability a theme before the 3 November US elections.

Hechos confirmados

• US housing starts in September: 1.221M annual pace, 5.2% below August (1.288M) and 7.4% below September 2025 (1.319M).^[1]
• Single-family starts: 859,000 annual pace, 4.6% below August (900,000).^[1][3]
• Building permits: 1.4M, 0.2% below August and 3% below a year ago. Single-family permits 845,000, down 4%.^[1]
• The margin of error on the monthly change in starts is plus or minus 11.8%.^[1]
• The average 30-year mortgage rate on 15 October was 7.40%, the same as a week earlier, against 6.27% a year ago.^[2][4]
• Single-family starts are down 4% year to date.^[3]
• The next release is due on 18 November 2026.^[1]

Implicaciones

• Nuestra lecturaHigh mortgage rates are holding back new home building in the US.
• Nuestra lecturaFewer starts now means fewer new homes in a year or two.

Todavía no se sabe

• Whether the September figures get revised: the Census Bureau often updates them in the next release.
• When mortgage rates will come down.

A quién afecta

USA. Anyone watching Fed rates, the dollar and US stocks

Fuentes

1. U.S. Census Bureau, HUD: Monthly New Residential Construction, September 2026 20 de octubre de 2026 · oficial
2. Freddie Mac: Primary Mortgage Market Survey 15 de octubre de 2026 · oficial
3. NAHB Eye on Housing: Single-Family Starts Down as Affordability Challenges Persist 20 de octubre de 2026 · medios
4. Investing.com: Строительство жилья в США падает при ставке 7,40% 20 de octubre de 2026 · medios