Colorado month-to-month lease termination

[Grayson Hussey]

I've just inherited tenants on month-to month leases in a duplex in Denver. The leases are 1st of the month to last day of the month. I need to get the units vacated so I can start renovations and I want to make sure I'm doing it right. 

My understanding of CO law is that 10-day notice is all that is needed for MtM leases. The tenants have been at the location for a while and I'm not ready to begin rehab yet, so I want to give them notice that they need to vacate no later than April 8th. If I deliver the notices tomorrow, the 15th of March, would that be legal?

[Bill S.]

@Grayson Hussey Effective Aug 9, 2017 the amount of notice required to terminate a month to month lease is 21 days in Colorado. 

13-40-107, C.R.S. now provides as follows:

(c) A tenancy of one month or longer but less than six months, twenty-one days;

Also, since the lease is Month to Month, the tenant or landlord gets the full month to occupy the unit. That is notice given today would mean the tenant has the right to occupy until April 30. Along the same lines you or the tenant have until April 8 to deliver a notice to that the tenancy is ending and have the tenant be out April 30. 

Not sure where @Gordon French's statute came from but it is the old law.

Here is the link to the Denver Post article which references the change in the law.