First things first, you should double check everything I say because you just should. You don't know me and I could be crazy, but more importantly, it's easy enough to do and a necessary part of your due diligence when buying a house. Here's an easy link to back up everything I'm saying. In the mean time, I'll cover some of the more popular zoning codes around Denver and also point out what you should be looking for. (If you have one I don't have listed here, ping me and I'll be happy to look it up for you.)
E-SU-DX: one property (meaning you can either live there or rent it out to one party), minimum 6,000 sq. ft. lot size, allows for suburban houses. Suburban houses in this case means properties with more height in the back, and sometimes are appropriate for group living and non-residential development.
E-SU-D1: one property (meaning you can either live there or rent it out to one party), minimum 6,000 sq. ft. lot size, allows for accessory dwelling units (aka, a cottage in the backyard.)
U-SU-A: one property (meaning you can either live there or rent it out to one party), minimum 3,000 sq. ft. lot size.
U-SU-A1: one property (meaning you can either live there or rent it out to one party), minimum 3,000 sq. ft. lot size, allows for accessory dwelling units (aka, a cottage in the backyard.)
U-SU-B1: one property (meaning you can either live there or rent it out to one party), minimum 4,500 sq. ft. lot size, allows for accessory dwelling units (aka, a cottage in the backyard.)
U-SU-B: one property (meaning you can either live there or rent it out to one party), minimum 4,500 sq. ft. lot size.
U-SU-C: one property (meaning you can either live there or rent it out to one party), minimum 5,500 sq. ft. lot size.
U-TU-B: two properties (meaning you can live there and or rent out to two different parties), minimum 4,500 sq ft lot
U-TU-B2: two properties (meaning you can live there and or rent out to two different parties), minimum 4,500 sq ft lot, row houses allowed on corner lots
U-TU-C: two properties (meaning you can live there and or rent out to two different parties), minimum 5,500 sq ft lot
U-MX-3: Urban, mixed use, max height 3 stories (commercial but not residential- you can build townhomes)
RES: outdated zoning code
SFR: outdated zoning code
Annnnd as always- I'm a real estate agent and I work with buyers, sellers and investors. And I'd love to work with you as well if you need help. Thanks! - Erin