UNION CITY, N.J. — Construction is nearing completion for Altessa, a 15-story residential condominium building located in Union City. The project is owned and is being developed by locally based Rocha Construction & Development. It features 100 units; a rooftop recreation space with an elevated pool and a running track; a residents-only gym; and a lounge with a flat-screen television. The one-, two- and three-bedroom homes range in size from 812 to more than 1,400 square feet and prices start at $310,000. Construction of a model unit on the top floor is expected to be completed in May. Initial occupancies are slated for this fall. Patina Realty is the marketing and sales agent for the project.