Downtown Westport's newest commercial building, four weeks after its first tenant opened for business, has welcomed a new, sartorially savvy retailer.

The New York City-based clothier Steven Alan on Friday opened a 1,800-square-foot showroom at 100 Post Road East, the second store it has launched in Fairfield County during the last three months.

"We're continuing to expand the success of the brand into new markets such as Connecticut, which is very close to home," said Scott Sanford, Steven Alan's East Coast district manager. "It shares the same sense of community and localized aesthetics that we look to become a part of."

The Westport Steven Alan store carries both men's and women's clothes, including Steven Alan and other brands such as Levi's, Girl by Band of Outsiders, A.P.C., Isabel Marant, Save Khaki, Acne, Clare Vivier, Sea and Dieppa Restrepo.

The shop also sells jewelry, purses, backpacks, sunglasses, watches, ceramics, notebooks and body-care products.

"We kind of cater to everybody," Sanford added. "The versatility of the brand and the company presents each person who comes in the opportunity to discover something new about our collection and also something that they get introduced to their lifestyle. It becomes a great one-stop shop."

Founded in 1994, Steven Alan operates eight New York City stores, six outlets in California, an establishment in East Hampton, N.Y., and two Connecticut showrooms. The retailer made its Nutmeg State debut in December with a store on Greenwich Avenue in Greenwich.

Steven Alan is the second retailer to open for business at 100 Post Road East. It follows the national paper retailer Paper Source, which opened Jan. 25 in an adjacent 2,900-square-foot space in the new structure.

Situated between Old Town Hall and a Bank of America branch, 100 Post Road East is the first new commercial building in downtown Westport in more than 40 years. The building has a tan-brick exterior and includes an outdoor terrace, 25 on-site parking spaces and ramps for strollers and disabled customers. Local architects Bill Achilles and Rick Hoag designed the building.

To make way for the new structure, an unused bank kiosk on the site was demolished last year. Construction of the building started in May 2012.

Development of 100 Post Road East required several zoning waivers, known as "variances," to be granted by the Zoning Board of Appeals. The Planning and Zoning Commission in March 2012 approved a site plan for 100 Post Road East.; 203-255-4561, ext. 118;