Revised housing permit data for 2011 released this month by the state Department of Economic and Community Development show an even greater dropoff in Connecticut building activity last year than had been previously reported.
The new figures, based on data supplied by towns that don't report their permit numbers to the state on a monthly basis, showed a 19.3 percent decline in building approvals last year. Earlier data had indicated only a 16 percent decline in housing approvals compared with the year before.
The decline was even steeper in New London County, which recorded 209 housing permit authorizations last year compared with 344 in the previous annual period. That's a decline of nearly 40 percent year over year.
Nearly all of the housing permits were for single-family homes, while 10 were for two-unit buildings and four sought three or four units.
While 53 building permits were issued in 2010 for construction of five or more units, no large-scale projects were approved last year in New London County.
The county also recorded 54 demolitions last year, for a net gain in housing units of only 155. This compares with a net gain of 280 two years ago.
East Lyme and New London led the region in the number of housing permits approved, with 28 each.
The final figures showed 3,173 building permits approved in Connecticut last year. That's a decline of more than 750 from the 3,932 reported approvals the year before.