* U.S. housing starts at 872,000-unit pace in September
* Home building likely to add to economic growth in 2012
By Jason Lange
WASHINGTON, Oct 17 (Reuters) - Groundbreaking on new U.S. homes surged in September to its fastest pace in more than four years, a sign the housing sector's budding recovery is gaining traction and supporting the wider economic recovery.
Housing starts increased 15 percent last month to a seasonally adjusted annual rate of 872,000 units, b eating even the most optimistic forecasts on Wall Street, C ommerce Department data showed on Wednesday.
It was the quickest pace of groundbreaking since July 2008, though data on starts is volatile and subject to substantial revisions.
America's economy has shown signs of faster growth in recent months as the jobless rate has fallen and retail sales data has pointed to stronger consumer spending.
Wednesday's data showed that housing, which was battered by the 2007-09 recession, is increasingly one of the brighter spots in the economy.
"One of the big headwinds for the economy has been the weak housing market and this indicates that headwind has dissipated," said Gary Thayer, an economic strategist at Wells Fargo Advisors in St. Louis, Missouri.
Home building could add to growth this year for the first time since 2005 and the brighter economic signal is likely to be welcomed at the White House, where a sluggish economy is weighing on President Barack Obama's chances of re-election next month.
Economists estimate that for every new house built, at least three new jobs are created.
Groundbreaking on new homes rose across much of the country, and was up 20.1 percent in western states. It fell 5.1 percent in the Northeast, however.
Yields on U.S. government debt rose as investors bet the data pointed to a stronger economy.
On the U.S. stock market, the PHLX Housing Index of leading home b uilders climbed 4 percent as D.R. Horton advanced 5 percent. Home improvement retailers Home Depot and Lowe's were also higher.
NOT YET NORMAL
Housing remains hampered by a glut of unsold homes, and the housing starts rate is still about 60 percent below its January 2006 peak.
Home building now makes up just over 2 percent of the e conomy, so it is unlikely to fuel a big acceleration in the recovery anytime soon. The European debt crisis looms heavily over the economic outlook, as does the possibility Washington could hike taxes and cut spending next year.
But every little bit helps, and more home building could partially compensate for recent weakness in factory output, which has been hit by sluggish export demand and cooling investment in capital goods.
"Things are lining up for housing," said John Canally, an economist at LPL Financial in Boston. "It's another step in the right direction, but you still have a long, long way to get back to 'normal' in housing."
September groundbreaking for single-family homes, the largest segment of the market, rose 11 percent to a 603,000-unit pace - the highest level since August 2008. Starts for multi-family homes climbed 25.1 percent.
Building permits grew 11.6 percent to a 894,000-unit pace in September, beating economists' forecasts.
U.S. home sales have been creeping up and the steep decline in prices since 2006 appears to have bottomed. That has helped home-builder sentiment, which this month rose to a fresh six-year high.
In a bid to help the economy by encouraging people to buy homes, the Fed said last month it would buy $40 billion in mortgage-backed securities every month until the jobs outlook improves substantially.
The Fed's efforts to lower borrowing costs have pushed interest rates on 30-year mortgages to all-time lows. Last week, fixed 30-year mortgage rates rose 1 basis point to average 3.57 percent, the Mortgage Bankers Association said.
Applications for U.S. home mortgages fell last week, but demand for purchase loans, a leading indicator of home sales, reached the highest level since June, the association said.
"It seems as though low interest rates and stable prices are starting to stir the interest of potential buyers," said Michael Moran, an economist at Daiwa Securities America in New York.