Important: Homzora is a housing research publisher, not a law firm, and nothing on this page is legal advice. This article is general information about the law as published by government and court sources at the time of writing, and it may not reflect later changes or the facts of your situation. Reading it does not create an attorney and client relationship. For advice about your situation, contact a licensed attorney or a legal aid organization in your state.
In the city of Denver, about 171,900 of 335,400 occupied homes, or 51.2 percent, are rented, according to the U.S. Census Bureau’s 2020 to 2024 American Community Survey (Homzora Denver dataset, Table B25003). The median gross rent is $1,831 a month (Homzora Denver dataset, Table B25064). Many of those households rent month to month, either by choice or because a lease ran out, and the notice rules for ending that kind of tenancy are different from the rules for a fixed term lease.
This guide explains how much notice a tenant and a landlord must give to end a month to month tenancy in Denver, how the notice should be delivered, and whether a just cause rule limits when a landlord can end it.
Quick answers
| Question | Answer |
|---|---|
| Notice from a tenant | 21 days for tenancies under six months; 28 or 91 days for longer ones |
| Notice from a landlord | The same tiers, but a listed cause is needed after 12 months |
| Just cause or good cause rule | Yes, for most tenants after 12 months |
These summaries are simplified. Read the full explanation below, which links to each source.
What Colorado law says
Colorado sets notice by the length of the tenancy: 21 days for a tenancy of one month or longer but less than six months, 28 days for six months or longer but less than a year, and 91 days for a year or longer (C.R.S. § 13-40-107). The notice may be signed by either the landlord or the tenant, so the same periods apply when a tenant ends the tenancy (C.R.S. § 13-40-107).
Colorado’s for cause eviction law
Under HB24-1098, which took effect April 19, 2024, a landlord generally may not serve a termination notice without a cause listed in the law (Colorado HB24-1098 (signed act); Colorado General Assembly, HB24-1098). Tenants who have been in the unit less than 12 months are not covered (Colorado HB24-1098 (signed act)). For no fault grounds, such as an owner or family move in, demolition, substantial renovation, withdrawing the unit to sell it, or the tenant refusing a new lease with reasonable terms, the notice must give the tenant at least 90 days (Colorado HB24-1098 (signed act)).
Denver
Denver’s Department of Housing Stability points renters to the state for cause eviction law rather than a separate city ordinance (Denver Department of Housing Stability, Tenant rights).
What notice timing costs
Notice mistakes cost real money. At the median gross rent of $1,831 a month in the city of Denver (Homzora Denver dataset, Table B25064), giving notice a few days too late can leave you owing about $1,831 for an extra month, or about $61 for each additional day where rent is prorated. Counting your dates carefully before you sign a new lease is one of the easiest ways to avoid paying rent on two homes.
Free help in Denver
Colorado Legal Services provides free civil legal aid at 303.837.1313 (Colorado Legal Services). For rental assistance and other services, call 211 (211.org).
How to give notice the right way
- Check your lease or rental agreement for any notice term.
- Count backward from your planned move out date using the rule above, and line it up with your rent due date where the law requires it.
- Write a short, dated notice with your address, your move out date, and your forwarding address.
- Deliver it in a way you can prove, such as certified mail, a tenant portal, or email with a reply.
- Keep a copy with proof of delivery.
A sample notice to end a month to month tenancy
Date: 2026. To: [landlord name and address]. Re: Notice of termination for [rental address]. This letter is my written notice that I will end my month to month tenancy at [rental address]. My last day will be 2026. I will return all keys on that date. Please send my security deposit and any itemized deductions to [forwarding address]. Sincerely, [name].
Adjust the date to meet the notice rule that applies to you. If you are unsure, giving more notice than required is usually safer than giving too little.
If you receive a notice from your landlord
- Read the date carefully and compare it with the notice rules above.
- Check whether a just cause or good cause rule applies where you live.
- Ask the landlord in writing to explain anything that looks wrong.
- Do not ignore court papers if any arrive; a notice is not the same as a court order.
- Contact a free legal help office quickly if you think the notice is improper.
Month to month versus a fixed term lease
A month to month arrangement gives both sides flexibility, but it also gives less certainty. A fixed term lease usually locks in rent and occupancy for the term, while a month to month tenancy can usually be ended or changed with notice. Many leases convert to month to month when they expire if no new lease is signed. If stability matters to you, ask whether the landlord will offer a new fixed term lease and compare the terms.
Rent increases on a month to month tenancy
Landlords often use notice rules to change the rent on a month to month tenancy. Rules for rent increase notices are separate from the rules for ending a tenancy, and some places set longer notice for increases. Check the rent increase guide for your city before agreeing to a new rate.
Planning your move
- Book movers or a truck as soon as your end date is set.
- Schedule utilities to end the day after your tenancy ends.
- Ask the landlord for a move out walkthrough.
- Photograph every room after it is empty.
- Return all keys and get a written receipt.
Your security deposit
Ending a tenancy properly protects your deposit. Give your forwarding address in writing, leave the unit clean, and photograph its condition. Then track the refund deadline that applies where you live. If deductions seem unfair, ask in writing for an itemized list and receipts.
When the landlord sells the building
A sale does not automatically end a tenancy. In many places the new owner takes the property subject to existing tenancies and must follow the same notice rules. If you hear the building is being sold, ask in writing who will hold your deposit and where to pay rent, and keep paying rent until you receive written instructions.
Build your evidence file
Landlord and tenant disputes are usually decided by documents. Keep these together from the day you sign:
- The signed lease, every addendum, and every renewal.
- Receipts or bank records for the deposit and each rent payment.
- Dated photos and video of every room at move in and move out.
- Copies of every repair request and the landlord’s replies.
- Every notice you send or receive, with proof of delivery.
Keep copies somewhere other than your phone, such as an email to yourself, so they survive a lost device.
Fair housing
The federal Fair Housing Act prohibits discrimination in rental terms because of race, color, religion, sex, familial status, national origin, or disability (42 U.S.C. § 3604). HUD accepts complaints (HUD, File a Complaint).
Counting the days
Notice periods are easy to miscount. Mark the day you deliver the notice, then count forward using the rule that applies to you. Where the law says notice must be given before the end of a rental period or before a rent due date, the end of the tenancy moves to the next rent cycle if you miss that cutoff. When the deadline falls on a weekend or holiday, deliver early rather than relying on an extension. A short calendar note with the delivery date, the method, and the calculated end date makes the timeline easy to prove later.
Coordinate the practical parts of a move
Once you have separately confirmed the dates that apply to your tenancy, build a logistics calendar around them. Keep the tenancy end date, the day you intend to remove your belongings, the moving service booking, and your arrival at the next home in separate fields. They may coincide, but treating them as one event can conceal a gap. Add a column stating whether each item is confirmed, requested, or still undecided.
Work backward from the planned transport day to identify dependencies. Furniture that must be emptied should appear before packing the final boxes. A borrowed cart should have both a collection time and a return arrangement. If someone else is helping, confirm the task and time rather than assuming a general offer means that person is available throughout the day. Assign one person to maintain the calendar so that changes do not remain in separate message threads.
For a hypothetical example, a household plans to load on Saturday but cannot enter the next home until Sunday. That creates a practical question about where belongings and people will be overnight. Write down the options and obtain actual quotes where services are involved. Include any extra handling in the comparison. Do not assume a storage booking, a parked vehicle, or a friend’s spare room is available until it has been confirmed.
Keep a small final departure list distinct from the packing inventory. It might include chargers, cleaning supplies, documents, and borrowed equipment. As each item leaves, record its destination rather than merely ticking a box that says done. At the next address, use the same list to locate what is needed first. This calendar is an organizational aid. It does not determine notice requirements, payment responsibilities, or the date a tenancy legally ends. Resolve those questions separately before relying on the schedule.
For related practical planning, visit the city housing hub and Moving to Denver in 2026: Rent, Housing, and Commute Data for Renters.
Frequently asked questions
Does notice have to be in writing?
In many states it does, as described above. Even where the law does not require it, written notice with proof of delivery is the best way to show when you gave it.
Can I leave in the middle of the month?
You can move out whenever you like, but rent is usually owed through the end of the notice period. Some states end the tenancy on the date in the notice and prorate rent, while others require notice to line up with the rent period, as explained above.
Can my landlord end my tenancy without a reason?
That depends on where you live. The quick answers table above shows whether a just cause or good cause rule applies in Denver. Retaliation and discrimination are illegal everywhere, even where no reason is otherwise required.
Legal notice
Homzora is not a law firm and does not provide legal advice. Laws, court rules, and local programs change, and how they apply depends on your facts. Before you act on anything in this article, confirm the current rules with the court, a licensed attorney, or a legal aid organization.
Sources
- Homzora Denver dataset, Table B25003
- Homzora Denver dataset, Table B25064
- C.R.S. § 13-40-107
- Colorado HB24-1098 (signed act)
- Colorado General Assembly, HB24-1098
- Denver Department of Housing Stability, Tenant rights
- Colorado Legal Services
- 211.org
- 42 U.S.C. § 3604
- HUD, File a Complaint