Avenue is the fastest growing leasing company in St. Louis for one reason, we are great at what we do. Our mission is to move your life forward by providing worry-free leasing and property management for your home. There are many of reasons to choose us, and here are just a few: Local St. Louis company, Best Tenant Guarantee, 30 Day Leasing Guarantee, Good Pet Guarantee, Low Fee Guarantee, No Worry Agreements and cancel at any time.