The Architecture Billings Index (ABI) showed more acceleration in the growth of design activity nationally. As a leading economic indicator of construction activity, the ABI reflects the approximate nine to twelve month lead time between architecture billings and construction spending. The American Institute of Architects (AIA) reported the August ABI score was 53.8, up from a mark of 52.7 in July. This score reflects an increase in demand for design services (any score above 50 indicates an increase in billings). The new projects inquiry index was 63.0, down from the reading of 66.4 the previous month
Key August ABI highlights:
- Regional averages: West (54.8), Northeast (54.4), Midwest (52.8), South (51.9)
- Sector index breakdown: mixed practice (60.1), commercial / industrial (54.8), multi-family residential (52.1), institutional (50.8)
- Project inquiries index: 63.0
The regional and sector categories are calculated as a 3-month moving average, whereas the index and inquiries are monthly numbers.



