Colorado's ADU law quietly changed everything for Denver homeowners last year — most people still don't know
Most of the conversation about housing costs in Denver focuses on what you can't control (rates, prices, inventory). But something pretty significant changed on June 30, 2025 that most homeowners missed.
HB 24-1152 now requires every city in the Denver Metro to allow one ADU on any single-family lot as a permitted use by right. No public hearings, no rezoning, just administrative approval. HOAs can no longer ban them outright either.
The practical effect: if you own a home in Denver, Aurora, Lakewood, Arvada, Englewood — almost anywhere in the metro — you can now legally build a rental unit on your property that wasn't possible 18 months ago.
At current Denver rents ($1,200–$1,800/month for a 1-bed), that's a 30–60% reduction in your effective mortgage payment.
Curious if anyone here has actually pulled permits under the new rules yet. Hearing timelines are all over the place depending on the city.