The Mortgage Bankers Association said its seasonally adjusted index of mortgage application activity, which includes both refinancing and home purchase demand, fell 2.3 percent in the week ended April 10.
The MBA's seasonally adjusted index of refinancing applications fell 1.8 percent, while the gauge of loan requests for home purchases, a leading indicator of home sales, fell 3.1 percent.
The refinance share of total mortgage activity rose to 58 percent of applications from 57 percent the week before.
Fixed 30-year mortgage rates averaged 3.87 percent in the week, up 1 basis point from 3.86 percent the previous week.
The survey covers over 75 percent of U.S. retail residential mortgage applications, according to MBA.