Existing-home sales increased in August, even with ongoing tight credit and appraisal problems along with regional disruptions created by Hurricane Irene, according to the National Association of Realtors. Monthly gains were seen in all regions.

Total existing-home sales, which are completed transactions that include single-family, townhomes, condominiums and co-ops, rose 7.7 percent to a seasonally adjusted annual rate of 5.03 million in August from an upwardly revised 4.67 million in July, and are 18.6 percent higher than the 4.24 million unit level in August 2010.

Lawrence Yun, NAR chief economist, said there are some positive market fundamentals. “Some of the improvement in August may result from sales that were delayed in preceding months, but favorable affordability conditions and rising rents are underlying motivations. Investors were more active in absorbing foreclosed properties. In additional to bargain hunting, some investors are in the market to hedge against higher inflation.”

Investors accounted for 22 percent of purchase activity in August, up from 18 percent in July and 21 percent in August 2010. First-time buyers purchased 32 percent of homes in August, unchanged from July; they were 31 percent in August 2010.

All-cash sales accounted for 29 percent of transactions in August, unchanged from July; they were 28 percent in August 2010; investors account for the bulk of cash purchases.

“We had some disruptions from Hurricane Irene in the closing weekend of August, when many sales normally are finalized, along the Eastern seaboard and in New England,” Yun said. “As a result, the Northeast saw the smallest sales gain in August, and some general impact is expected in September with widespread flooding from Tropical Storm Lee. Aberrations in housing data are possible over the next couple months as markets recover from disrupted closings and storm damage.”

According to Freddie Mac, the national average commitment rate for a 30-year, conventional, fixed-rate mortgage fell to 4.27 percent in August, down from 4.55 percent in July; the rate was 4.43 percent in August 2010.  Last week, Freddie Mac reported the 30-year fixed rate fell to a record low 4.09 percent.

NAR President Ron Phipps, broker-president of Phipps Realty in Warwick, R.I., said the market is remarkably affordable for people with secure jobs, good credit and long-term plans. “All year, the relationship between home prices, mortgage interest rates and family income has been hovering at historic highs, meaning the best housing affordability conditions in a generation,” he said.

Contract failures – cancellations caused largely by declined mortgage applications or failures in loan underwriting from appraised values coming in below the negotiated price – were reported by 18 percent of NAR members in August, up from 16 percent July and 9 percent in August 2010.

The national median existing-home price for all housing types was $168,300 in August, which is 5.1 percent below August 2010. Distressed homes – foreclosures and short sales typically sold at deep discounts – accounted for 31 percent of sales in August, compared with 29 percent in July and 34 percent in August 2010.

Total housing inventory at the end of August fell 3.0 percent to 3.58 million existing homes available for sale, which represents an 8.5-month supply at the current sales pace, down from a 9.5-month supply in July.

Single-family home sales rose 8.5 percent to a seasonally adjusted annual rate of 4.47 million in August from 4.12 million in July, and are 20.2 percent above the 3.72 million pace in August 2010. The median existing single-family home price was $168,400 in August, which is 5.4 percent below a year ago.

Existing condominium and co-op sales increased 1.8 percent a seasonally adjusted annual rate of 560,000 in August from 550,000 in July, and are 8.3 percent higher than the 517,000-unit level one year ago. The median existing condo price5 was $167,500 in August, down 3.3 percent from August 2010.

Regionally, existing-home sales in the Northeast increased 2.7 percent to an annual pace of 770,000 in August and are 10.0 percent above a year ago.  The median price in the Northeast was $244,100, which is 5.1 percent below August 2010.

Existing-home sales in the Midwest rose 3.8 percent in August to a level of 1.09 million and are 26.7 percent above August 2010. The median price in the Midwest was $141,700, down 3.5 percent from a year ago.

In the South, existing-home sales increased 5.4 percent to an annual pace of 1.94 million in August and are 16.9 percent higher than a year ago. The median price in the South was $151,000, which is 0.8 percent below August 2010.

Existing-home sales in the West jumped 18.3 percent to an annual pace of 1.23 million in August and are 20.6 percent higher than August 2010. The median price in the West was $189,400, down 13.0 percent from a year ago.