A new cultivar of shrub rose, Rosa `BAItown`, characterized by its everblooming habit with abundant clusters of double, red-purple, hybrid tea-shaped flowers. The foliage is dense, dark green, glossy, and resistant to rose blackspot and powdery mildew. The even spreading to mounded plant habit is well suited for container and landscape plantings. The new variety is readily propagated on its own roots and hardy in U.S.D.A. Zones 4 to 9.