WASHINGTON – U.S. homebuilders broke ground on fewer apartment complexes in February, causing overall housing starts to fall 7 per cent.The Commerce Department said Friday that housing starts last month were at a seasonally adjusted annual pace of 1.24 million, a decline that was anticipated after construction surged in January to 1.33 million.February’s slowdown in construction came from a 28 per cent plunge in starts for multi-family buildings. Groundbreakings for single-family houses actually rose 2.9 per cent.Builders’ efforts have shifted to single-family houses as the economy has improved and as fewer existing homes are being listed for sale. The solid job market and a growing millennial population looking to purchase a home have lifted demand over the past two years. But the number of homes listed for sale has fallen during that time. Increased construction has not fully offset the shortage.The U.S. housing market appears to be stable because of the relative health of the overall economy. That may be tested by rising mortgage rates that could put a new home out of reach for many.“Soaring employment and faster wage growth should support the housing market, but activity is going to be constrained by higher rates,” said Ian Shepherdson, chief economist at Pantheon Macroeconomics.Single-family house construction increased last month in the Northeast, South and West, but it declined in the West.The National Association of Realtors said that the total supply of existing homes for sale dropped to 1.52 million in January, which contributed to sales of existing homes declining 4.8 per cent over the past 12 months.Building permits, an indicator of future construction, tumbled 5.7 per cent to an annual pace of 1.30 million. But that decline, too, was largely concentrated in apartment complexes, suggesting that construction companies expect more Americans to segue to home ownership.Builder sentiment remains positive, although it has slipped over the past three months. The National Association of Home Builders/Wells Fargo builder sentiment index for March ticked down a point to 70. Any reading above 50 indicates more builders see sales conditions as good rather than poor.Stock investors have also decided that homebuilding companies are overpriced after a strong performance in 2017. Shares in D.R. Horton have dropped nearly 15 per cent so far this year. The Pulte Group is down almost 13 per cent. Stock in Tolls Brothers had lost about 8 per cent of its value.Homebuyers are facing greater cost pressures. The shortage of homes on the market has caused prices to climb much faster than wages. At the same time, it has become slightly more expensive to borrow. The average rate for 30-year, fixed rate mortgages has risen to 4.44 per cent from 4.30 per cent a year ago, according to mortgage buyer Freddie Mac.