Special Leasing Offers. Call for Details. Welcome to The Armstrong at Knox, newest luxury apartments offering distinct luxurious residences focused on sophistication, design, and leisure. The Armstrong at Knox is fashioned after a boutique hotel that offers a lavish living experience. Socialize with friends by the beautifully landscaped pool and the lounge deck. The indulgence continues with the fitness center, serene garden courtyard, dining and grilling areas, and more. With a convenient location on Knox-Henderson, located next to Highland Park, residents will enjoy the on-site retail such as Trader Joe's, Black Optical, Little Katana, Paper Source, and Sur La Table. Residents can also take advantage of the Katy Trail just blocks away. We invite you to discover culture, luxury and convenience at The Armstrong at Knox.