STAMFORD, CONN. — Construction has topped out for Highgrove, an 18-story luxury condominium tower located at Forest and Grove streets in the central business district of Stamford. Upon completion, the building will contain 92 residences, three guest suites and 230 indoor, valet parking spaces. Units will be available with two, three or four bedrooms, and will average 2,558 square feet each. Amenities include private elevator access to each unit, a wine cellar, a 24-hour doorman, concierge services, an indoor swimming pool with a retractable roof, a spa and fitness center, a private screening room and valet parking service. Residences are priced from $1.2 million. Highgrove is a joint venture project between Ceebraid-Signal Corp. and the New York-based real estate investment arm of Investcorp International. The project was designed by A.M. Stern Architects. Completion is scheduled for fall 2009.