WASHINGTON (Reuters) - Sales of newly built single-family homes slowed in November to the weakest levels since 1991, according to Commerce Department data on Tuesday that offered fresh evidence of housing market distress.

The seasonally adjusted annual sales pace of 407,000 was down 2.9 percent from October and was the lowest rate since January, 1991.

Economists polled by Reuters had forecast sales would notch a 420,000 rate compared with a downwardly revised 419,000 in October, previously reported as 433,000.

The median sales price rose to $220,400 from $214,600 in October. The median marks the half-way point, with half of all houses sold above that level and half below.