That is the highest percentage since 2007 and the third straight quarter that such optimism has gained. (Read More: CNBC Poll: Economy’s Worse, but Obama Favored to Fix It.)

“Overall the housing industry has come back,” said Standard and Poors’ David Blitzer, commenting on Tuesday’s release of the latest SP/Case-Shiller home price indices. “We might finally get a little boost to the economy from the housing sector.”

Home prices in the nation’s top twenty markets rose 1.2 percent in July from a year ago, according to SP/Case-Shiller. (Read More: US Home Prices Rose for Sixth Month in a Row: Case-Shiller.)

All of those markets saw month-to-month price gains, while just four saw annual declines.  Atlanta continues to see the largest drop, down just under 10 percent year-over-year, but even its declines are easing.

In Phoenix, where distressed properties have made up the bulk of home sales, prices are up 16.6 percent from a year ago, due to big supply shortages of low-end homes.

Home prices are still down 30 percent from their peak in 2006, but just the prospect of a real bottom has some buyers finally getting off the fence. In addition, rising prices helped 1.3 million home owners to rise out of a negative equity position on their mortgages in the first half of this year, according to CoreLogic.

Nearly 11 million, or 22 percent of all borrowers, are still stuck in place, owing more on their mortgages than their homes are worth, and an additional 2.3 million have less than 5 percent equity in their homes, making a move up unlikely. (Read More: More Homes Are Above Water, But Some Sellers Still Suffer.)

The latest numbers, from existing home sales to earnings from the big public home builders, are fueling much-needed confidence in housing, but it would be naïve to declare that this industry is completely out of the woods.

Positives, like record-low mortgage rates and much-improved affordability are offset by still high negative equity, tight credit conditions and continued uncertainty about the overall state of the economy.

Just 10 percent of those polled in the CNBC survey say the economy is good or excellent, with 91 percent saying it is only fair or poor. Fifty-three percent say it is poor, with 25 percent saying it will get worse. These sentiments are little changed from the survey results in June.

Housing still faces some huge unknowns, including tough regulation on mortgage lending, the looming “fiscal cliff,” and more than 5 million loans that are either delinquent or in the foreclosure process.

Supplies of distressed homes are low, but much of that is due to delays in the foreclosure process which are just now beginning to lift. New mortgage delinquencies are falling slightly, but they are still far higher than historical norms. (Read More: ‘Underwater Mortgage’ Refis Get Fresh Push in Congress.)

There is also a possible new headwind that few have mentioned. That is the potential loss of the Bush 2007 Mortgage Relief Act benefit.

This act negates any tax liabilities against borrowers who do so-called “short sales.” This is when the bank allows the home to be sold for less than the value of the mortgage. The debt that is forgiven (that is the amount of the mortgage not covered by the sale price) would usually be taxed, but this act put a temporary stop to that in order to give borrowers relief and stimulate the short sale market.

This act expires at the end of this year, and Congress has yet to extend it.

“Private investors, Realtors and banks have begun to drive short sales hard, as foreclosures take too long and are too politically sensitive,” said housing analyst Mark Hanson. “The loss of the Bush 2007 Mortgage Relief Act benefit, which has been driving incremental short sale volume all summer — and is responsible for a large part of the year-over-year increase in sales volume — will drive sales volume into a “triple dip” in the winter/spring…Prices will get hit as well.”

It is of course possible that Congress will extend the act at the last minute, but this is just one example of many “ifs” still present in the market. 

Mortgage rates may be low now, but some say they could move up next year, influenced by factors outside the Federal Reserve’s recent attempt to lower them (QE3). (Read More: How Does the Fed Help My House My Mortgage?)

Home prices appear to be improving, but a new flow of distressed properties could lessen those gains this fall. And again, so much still depends on jobs. SP’s David Blitzer may believe housing is back, but his colleague Robert Shiller said last week that he wasn’t convinced.  Suffice it to say, the housing market has come a long way, but it still has a long way to go.

—By CNBC’s Diana Olick

Click on ticker to follow real estate news:

US Home Builders

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Construction General Building Materials

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