View Photo Gallery: The 2012 DC Design House, a showcase for local interior designers, is at 4951 Rockwood Pkwy. NW in Washington.

A seven bedroom house at 4951 Rockwood Pkwy. NW has been chosen as the 2012 DC Design House. The wooded property, located at a prominent Spring Valley intersection, will be redecorated by a team of about 20 designers and then open to the public from April 14 to May 13.

The house, which has been in the same family since 1956, is known to local Washingtonians as the “Blue Christmas House” or “Elvis House,” as in past years its entire perimeter was decked out for the holidays in thousands of blue lights. It is on the market for $3.9 million.

“This gracious Georgian house was on our short list last year because we were so impressed by the bones of the house and the beautiful setting,” says Susan Hayes Long, who is chairing the event this year.

(See galleries of DC Design House for 2011 and 2010 on next page)

View Photo Gallery: Design House 2011: Get the details on how nine designers put together their showcase spaces for this ultimate open house benefiting the Children’s National Medical Center.

The will be the fifth year for DC Design House, which takes a luxury property and transforms it, serving as a barometer of Washington interior design trends. Last year’s DC Design House, a 1925 Tudor in Forest Hills with a beamed ballroom and glamorous pool, attracted 7,500 visitors and raised $200,000 for Children’s National Medical Center, according to Skip Singleton, co-founder of the DC Design House and principal broker at DC Living Real Estate. Children’s is also the beneficiary of this year’s show house.

Curious about seeing the “before” version of the house before the decorators move in? As has been the tradition in previous years, organizers will open the property to the public for a Bare Bones Day on Saturday, Feb. 25 for a fee of $5. If visitors that day purchase a $20 ticket to the show house, they will get a $5 discount.

View Photo Gallery: Design House 2010: Twenty local design firms, a mix of established names and first-timers, have redecorated Wirelawn, a more than 100-year-old country Georgian house, which has been the location of an inaugural ball, an embassy and the site of a 1974 show house.

Neighborhood guide: Spring Valley