NEW YORK (CNNMoney.com) -- More homeowners than ever are selling at a loss, propelling the real estate market deeper into crisis.

In the 12 months that ended June 30, nearly 25% of all homes sold nationwide fetched less than sellers originally paid, according to real estate Web site Zillow.com.

While the nation's double-digit decline in home prices has been well documented, the new report underscores the economic force of those price declines. Homeowners are walking away with much less in their pocket when they sell. And that affects more than the real estate market.

"It's stunning what's happening out there," said Stan Humphries, Zillow's vice president of data and analytics, who looked at statistics that date back to 1996. "The numbers are the worst we've seen and it's not just the magnitude of the problem but the scope - so many markets are affected."

NEW YORK (CNNMoney.com) -- The foreclosure juggernaut lurched forward in July as banks took back 77,295 homes - up 8% in a month and 183% in a year, a report issued Thursday shows.

Total foreclosure filings - delinquency notices, auction sale notices and bank repossessions - were up 8% from June and55% year-over-year, according to RealtyTrac, an online marketer of foreclosed homes.

One of every 464 U.S. households received at least one filing during July. And more than 680,000 homes have been repossessed by lenders since the beginning of August 2007, when the credit crunch hit.

"Bank repossessions, or REOs, continued to be the fastest growing segment of foreclosure activity," said RealtyTrac's chief executive officer, James Saccacio, in a statement. "The sharp rise in REOs, combined with slow sales, has resulted in a bloated inventory of bank-owned properties for sale."

The company says it has more than 750,000 active listings of repossessed homes for sale on its database. That represents about 17% of all the existing homes for sale in the United States as reported by the National Association of Realtors.

Foreclosure activity in Nevada, surpassing all other states, touched one in every 106 households in July. Foreclosures in the state were up 15% for the month and were almost double the rate of last July.

Other hard-hit states included California (one of every 182 households), Florida (one of 186) and Arizona (one of 195). For sheer volume, California led the other states with a total of 72,285 filings.

An especially high percentage of the California filings were bank repossessions. There were 23,406 in all, up from just 4,444 in July 2007. The state accounted for more than a third of all such events in the nation. The number was also a big jump from June's total of 20,624 bank repossessions in the state.

"The properties there, once they enter foreclosure, are making a beeline back to the banks," said RealtyTrac's spokesman, Rick Sharga.

Many of the California homes were bought during the height of the frenzy of the mid-2000s at inflated prices. Now that home values have dropped, borrowers who bought at the top owe more than their homes are worth. These properties are almost impossible to refinance and are difficult to sell.

NEW YORK (CNNMoney.com) -- Home building fell sharply in July to a 17-year low, according to government readings released Tuesday that offered fresh signs that the battered real estate market has yet to hit bottom.

Housing starts plunged 11% to an annual rate of 965,000 from a revised 1.084 million pace in June, according to the Census Bureau report. Economists surveyed by Briefing.com had forecast starts would fall to a rate of 960,000.

Permits - often seen as a sign of builders' confidence in the housing market - tumbled 17% to an annual rate of 937,000 from a revised 1.138 million in June. Economists had forecast that permits would come in at 959,000.

The sharp percentage drop from June was due partly to a jump in multi-family home starts and permits

NEW YORK (CNNMoney.com) -- Sales of existing homes rose more than expected in July, but prices continued to fall and inventory increased. That's according to the latest reading on the battered housing market by an industry trade group released Monday.

The National Association of Realtors reported that sales by homeowners in July increased to an annual pace of 5 million, up from the revised June reading of 4.85 million.

That's better than the annual pace of 4.9 million that economists surveyed by Briefing.com expected, and it's the highest pace since February. Still, July sales were down 13.2% from a year earlier.