Ten days after opening a new Crestwood Village of homes and recreation for mature persons on a site southwest of this city, the development firm called Crestwood Communities has reported being "extremely pleased" by the initial response.

David Wolff, marketing director for the firm based in Whiting, N.J., said that more than 400 groups of lookers went through the semi-detached and cluster-house models last Sunday. Prices range from about $35,000 to $66,000. Most of the units have two bedrooms. The fourplex units on one floor are efficiency apartments priced at the lowest end of the line.

Wolff said that the largest and highest-priced two-bedroom, semi-detached model has attracted the most initial interest from persons in a market that extends between Washington and Baltimore and north into Pennsylvania, south into Virginia, west into West Virginia and even to Delaware.

In the planning stage for two years, the Crestwood Village at Frederick is being built on a 210-acre former dairy farm site near where Rte. 70N meshes into Rte. 270 going south into Washington. Wolff said the selling goal is 100 units this year and then 300 annually. "We hope to sell out the more than 1,000 dwellings in less than four years," he added.

In addition to the one-level-living units, Crestwood also will have a clubhouse for a variety of recreation activities geared to pre-retirement buyers. The recreation facility is scheduled to be open this fall when the first residents move into the new Crestwood.

The exteriors of the Crestwood dwellings are mainly aluminum siding, but some brick exterior trim is used on some of the units. Some have one-car garages; others are built in clusters accommodating four living units on the first floor and four more on a second level reached via an interior stairway.

Since the firm opened its first Crestwood Village mature adult community 13 years ago in New Jersey, total sales have exceeded 10,000, according to Wolff.

Don Van Reenan, remembered as a football and track star at the University of Maryland about 15 years ago, is project manager in charge of all construction at Crestwood at Frederick.