This empty patch of grass and dirt will one day be home to a meandering stone wall, garden, sidewalks and 29 upscale single-family homes.

The demolition of the former American College of Cardiology building earlier this year has made way for a wide open 10-acre site along Old Georgetown Road — one of Bethesda’s busiest thoroughfares. The large brick office building the College used to call home is gone. So are a number of trees that dotted the property.

In place will go the 29 houses, three townhomes and two duplexes of Bethesda Mews, from D.C.-based Streetscape Partners. The developer will build an extension of Camberley Avenue through the neighborhood to Alta Vista Road, two recreation areas and a stormwater system improvement for the existing neighborhood.

There will also be a 9,000-square-foot area at the “grand entrance” to the community that will include stone garden walls, benches, pathways, sitting areas and an archway. The project was approved by the Planning Board in April 2013 with support from the neighborhood citizens association.