Free Colorado Notice of Non-Renewal
The written notice Colorado landlords use to end a periodic tenancy or decline to renew a fixed-term lease. C.R.S. § 13-40-107 sets the notice period: 21 days written notice. Built for Colorado landlords.
Notice of Non-Renewal is one of the highest-stakes routine documents in Colorado landlord-tenant practice. A defective notice — wrong period, improper service, missing required information — cannot support an eviction action, forcing the landlord to start over and pushing recovery of possession back by months. Colorado non-renewal practice has technical requirements: cumulative occupancy controls notice period; the clock starts at delivery; service must follow C.R.S. § 13-40-108; the notice must be in writing with all required elements. The form on this page handles the mechanics correctly; the page itself walks through the analysis step by step.
CA Notice Period
21 days
Authority
§ 13-40-107
Allowed Hours
Business hours
Emergency
No notice required
On this page
A Colorado Notice of Non-Renewal is the written notice a landlord uses to end a periodic tenancy or to communicate that a fixed-term lease will not be renewed at expiration. C.R.S. § 13-40-107 sets the notice-period requirements: 21 days written notice. Service must follow C.R.S. § 13-40-108. Cities including Denver Anti-Eviction Ordinance, Boulder add additional requirements through local ordinances. Getting the notice right is high-stakes work: a defective notice cannot support an eviction action, and the landlord must start over with a corrected notice — pushing recovery of possession back by months. The form on this page handles the mechanics; the rest of this guide walks through the requirements.
📅 Notice Period Calculator
Enter the date you’ll deliver the notice. The calculator shows the earliest valid termination date under C.R.S. § 13-40-107.
Earliest valid termination date
—
✎ Complete Your Colorado Notice of Non-Renewal
1 · Notice Dates
2 · Tenant & Property
3 · Landlord Contact
📋 Before You Serve — Pre-Send Checklist
What a Notice of Non-Renewal does
A Colorado Notice of Non-Renewal is the document that ends a residential tenancy without alleging tenant fault. It is the formal communication that the tenancy will not continue past the date specified in the notice. Two distinct scenarios trigger its use: (1) ending a periodic (month-to-month) tenancy, and (2) declining to renew a fixed-term lease at expiration.
The notice is procedurally similar to other Colorado eviction-related notices, but substantively different. A pay-rent-or-quit notice alleges nonpayment. A cure-or-quit notice alleges a curable lease breach. A notice of non-renewal does not necessarily allege any wrongdoing — it simply ends the tenancy at the end of the notice period. Note: Colorado has a statewide just-cause requirement for non-renewal under C.R.S. § 38-12-1301 et seq. (HB 23-1098); for many residential tenancies a qualifying just-cause ground is required to non-renew.
What the notice accomplishes practically: it establishes the date on which the tenant’s legal right to occupy the premises ends. After that date, if the tenant has not vacated, the landlord may file an unlawful detainer or eviction action to recover possession. The non-renewal notice is the precondition to the eviction action — without it (or with a defective version), the landlord cannot lawfully recover possession of a tenancy that has not otherwise been forfeited.
The form on this page produces a Notice of Non-Renewal that satisfies C.R.S. § 13-40-107 and complies with Colorado’s notice-period requirements. The mechanical accuracy of the document is critical: a notice that gets the period wrong, omits required information, or fails proper service is unenforceable, and the landlord must start over.
Colorado legal framework
Colorado non-renewal of a residential tenancy operates under several layered sources of law. Three primary frameworks apply to most non-renewal notices in this state.
1. C.R.S. § 13-40-107 — the notice-period statute. This is the primary statute setting the required advance notice for terminating a residential periodic tenancy. The notice period is 21 days written notice. The period runs from the date of delivery to the termination date stated in the notice, not from the date the notice was prepared.
2. C.R.S. § 13-40-108 — service of termination notices. This statute sets out the authorized methods for delivering a non-renewal notice, typically including personal delivery, substituted service plus mailing, or posting plus mailing. Colorado courts generally do not accept mailing alone or electronic notice (email/text) as adequate service for a termination notice.
3. Implied covenant of quiet enjoyment. Independent of any specific statute, every Colorado residential lease carries an implied covenant that the tenant will have peaceful, exclusive possession of the premises for the duration of the tenancy. A non-renewal notice that is part of a pattern of harassment, retaliation, or discrimination breaches this covenant and exposes the landlord to claims for damages, attorney’s fees, and equitable relief.
Anti-retaliation protections. C.R.S. § 38-12-509 prohibits a landlord from retaliating against a tenant for asserting rights under Colorado landlord-tenant law. A non-renewal notice issued shortly after protected tenant conduct (habitability complaint, code-enforcement contact, organizing or joining a tenant association) can create a presumption of retaliation that the landlord must overcome with evidence of a legitimate, non-retaliatory reason.
Anti-discrimination protections — federal Fair Housing Act and Colorado fair housing law. A non-renewal notice that targets a tenant based on a protected class (race, color, religion, national origin, sex, familial status, disability, and source of income in some jurisdictions) violates fair housing law regardless of whether the technical notice-period requirements are met. Disparate-impact analysis can also reach facially neutral policies that disproportionately affect a protected class.
Local ordinances. Several Colorado cities — Denver Anti-Eviction Ordinance, Boulder — layer additional just-cause and notice requirements on top of state law. Local ordinances can include narrower just-cause grounds, longer notice periods, mandatory pre-notice filings, and tenant relocation-assistance requirements. Always check the local ordinance before serving a non-renewal in a covered city; the local ordinance controls when it imposes a stricter requirement than state law.
Notice period under § 13-40-107
C.R.S. § 13-40-107 sets the notice period for terminating a residential periodic tenancy in Colorado. In Colorado, the required advance notice for terminating a residential periodic tenancy is 21 days.
| Tenancy | Required notice | Source |
|---|---|---|
| Periodic tenancy | 21 days written notice | C.R.S. § 13-40-107 |
The clock starts at delivery. The notice period runs from the date the tenant has actual or presumed notice — typically the date of personal delivery, or the date the substituted service or posting and mailing combination is complete. The notice must specify a termination date that falls at or after the end of the required period. A notice that calculates the date wrong (for example, counting from the date of preparation rather than the date of service) is defective and unenforceable.
Cumulative occupancy controls — not lease term. A tenant who has occupied the same unit for an extended period under sequential leases generally has a tenancy measured by cumulative occupancy. Resetting the lease clock by signing a new agreement does not reset the notice period for purposes of § 13-40-107. This catches landlords who assume a fresh fixed-term lease creates a fresh tenancy for notice purposes.
Fixed-term leases — non-renewal vs. termination. A fixed-term lease typically expires by its own terms on the last day of the term. If the lease itself requires the landlord to give advance notice of non-renewal, failing to give that notice may convert the tenancy to month-to-month on the same terms. Check the lease before assuming the fixed term simply expires.
The notice cannot be shortened by lease provision. A lease term that purports to authorize less than the statutory notice period is void and unenforceable as to that provision. The tenant can consent to a shorter period at the time the notice is issued, but cannot prospectively waive the § 13-40-107 minimum in advance through a lease.
The notice can be lengthened by lease provision. A lease that requires the landlord to give 90 days notice of non-renewal is enforceable — the landlord must give the longer period the lease specifies. Longer-notice lease provisions are common in larger rental developments and corporate-owned properties.
Authorized delivery methods
C.R.S. § 13-40-108 sets out the authorized methods for serving a notice of non-renewal in Colorado. Mailing alone is generally not sufficient — the notice must be served by personal delivery, by substituted service plus mailing, or by posting plus mailing. The chosen method affects when the notice period begins.
| Method | Procedure | Effective date |
|---|---|---|
| Personal delivery | Hand the notice directly to the tenant. | Date of personal delivery — clock starts immediately |
| Substituted service plus mailing | Leave the notice with a person of suitable age and discretion at the tenant’s residence (an adult occupant or guest) AND mail a copy to the tenant at the residence. | Date of substituted service — but the tenant must have actual receipt or a reasonable opportunity for receipt |
| Posting plus mailing | Affix the notice in a conspicuous place at the residence (front door is standard) AND mail a copy to the tenant at the residence. | Date of posting and mailing — both must be complete |
| Mailing alone | Generally NOT sufficient for residential termination notices in Colorado. Mailing is the supplement to substituted service or posting, not a standalone method. | — |
| Email or text alone | NOT an authorized method under Colorado law, even if the lease purports to authorize electronic service. Courts have held electronic-only service insufficient for termination notices. | — |
Personal delivery is the cleanest and most defensible. Whenever practical, deliver the notice personally to the tenant. Document the date, time, and circumstances of delivery — ideally with a witness or photo. Personal delivery starts the notice clock immediately, eliminating any dispute about when the period began.
Substituted service requires both steps. A landlord who leaves the notice with the tenant’s adult son but does not also mail a copy has not perfected service. Both steps must be completed for substituted service to be effective. The mailing must be by ordinary first-class mail to the tenant at the rental address.
Posting plus mailing is the fallback when personal contact is not possible. If the tenant is not home and no adult occupant is present, the landlord may post the notice in a conspicuous place at the residence and mail a copy. Photograph the posting in place for the file. The notice must be in a location where the tenant would reasonably discover it — the front door of the unit is standard.
Document delivery rigorously. Whatever method is used, the landlord should document the date, time, method, and circumstances of delivery. The landlord’s defense in any later challenge to the notice — including in an unlawful detainer or eviction proceeding — depends almost entirely on this documentation. Keep delivery documentation in the property file for the duration of the tenancy plus the applicable statute of limitations.
Local ordinances overlay
Colorado non-renewal practice has multiple cities with their own just-cause and tenant-protection ordinances that layer on top of state law. The local ordinance always controls when it imposes a stricter requirement than state law.
| Ordinance | Notes |
|---|---|
| Denver Anti-Eviction Ordinance | City-level just-cause and/or relocation requirements; consult the specific ordinance. |
| Boulder | City-level just-cause and/or relocation requirements; consult the specific ordinance. |
This page does not enumerate every provision of every local ordinance. Before serving a non-renewal in a covered city, landlords should consult the specific local ordinance and, where the stakes warrant it, local counsel. Local ordinances commonly require: pre-notice rent registration; specific just-cause grounds (often narrower than state law); enhanced relocation assistance; and notice content beyond the state-law minimum.
Required information for the notice
C.R.S. § 13-40-107 does not specify a precise content requirement for non-renewal notices, but settled Colorado practice and case law establish a minimum set of elements the notice must contain.
| Element | Why it’s required |
|---|---|
| Date of the notice | Establishes the timeline; required for proof of service |
| Names of all tenants | The notice must run against every adult tenant on the lease (or all named occupants if no formal lease) |
| Property address | Identifies the specific premises being terminated |
| Termination date | Must be at least the required period after delivery; specific calendar date |
| Statutory authority | Reference to C.R.S. § 13-40-107 establishes the legal basis |
| Landlord name and contact | Required for any tenant response or follow-up |
| Signature | Must be signed by the landlord or authorized agent |
| Method of service | Notice itself doesn’t require this, but proof of service should be prepared and retained |
Termination date must be calculated correctly. The date stated in the notice as the termination date must be at least the statutory required number of days after the date of delivery. A notice that says “tenancy terminates X days from the date of this notice” without identifying a specific calendar date creates ambiguity and is on weaker enforcement ground. Pick a specific calendar date and verify the math.
The landlord’s identity must be unambiguous. If a property-management company is serving the notice on behalf of an owner, the notice should make that relationship clear. A notice signed in an ambiguous capacity invites disputes about authority.
Documentation supports the notice. Beyond the notice itself, the landlord should retain a copy of the lease (showing the tenancy duration and terms), a record of delivery (proof of service), and any communications with the tenant about the non-renewal. These documents become evidence if the tenant disputes the notice.
Common mistakes that void the notice
Calculating the notice period from the wrong date
The notice period runs from the date of delivery, not from the date the notice was prepared, signed, or dated. A notice signed on March 1, served on March 15, with a termination date that does not account for the service date as the start of the clock is defective. The miscalculation is one of the most common reasons notices fail in unlawful detainer or eviction proceedings.
Counting cumulative occupancy wrong
For states with tiered notice periods, the longer period applies to tenancies measured by cumulative occupancy. A landlord who measures from the most recent lease renewal — rather than from the original start of the tenancy — applies the wrong period. Check the cumulative tenancy length carefully.
Mailing-only service
Colorado requires personal delivery, substituted service plus mailing, or posting plus mailing. Mailing alone is generally not sufficient. Landlords who mail the notice and assume electronic-delivery confirmation is enough have not perfected service.
Email or text-only delivery
Email and text are not authorized methods of service for termination notices in Colorado, even if the lease purports to authorize electronic service. A notice delivered only by email or text is generally void.
Issuing a non-renewal during a protected period
Under C.R.S. § 38-12-509, a non-renewal that follows protected tenant conduct (habitability complaint, code-enforcement contact, tenant union activity) can be presumed retaliatory. Issuing a non-renewal within the protected period without a documented legitimate reason invites a retaliation claim and shifts the burden of proof to the landlord.
Targeting a tenant in a protected class
Even where the technical notice-period requirements are met, a non-renewal that targets a tenant based on race, religion, national origin, familial status (including pregnancy or having children), disability, source of income, or other protected characteristics under federal and Colorado fair housing law is illegal. Disparate-impact analysis can also reach facially neutral patterns. A pattern of non-renewals concentrated in one demographic exposes the landlord to fair housing claims.
Failing to identify all tenants on the notice
Every adult tenant named on the lease should be named on the non-renewal notice. A notice that omits one of the named tenants is on weaker ground and may not support an eviction action against the omitted tenant. Some courts also require service on each named tenant individually.
Wrong termination date for the rental period
For periodic tenancies, the termination date should fall at the end of a rental period, not in the middle. A notice that terminates the tenancy mid-month for a month-to-month tenancy may not support an eviction until the end of the next rental period. Colorado courts vary on how strictly this is enforced, but the safer practice is to align termination with the end of a rental period.
Not retaining a copy of the notice and proof of service
The notice and proof of service are the landlord’s primary evidence in any later eviction proceeding. Failing to retain copies leaves the landlord without the foundation to prove proper notice was given. Maintain the notice, proof of service, and any related communications in the property file.
Tenant remedies for defective notice
A Colorado tenant who receives a defective non-renewal notice — wrong period, improper service, missing required information, or retaliatory or discriminatory motive — has multiple potential remedies. Understanding these helps landlords appreciate why getting the notice right matters.
Affirmative defense in eviction proceedings
The most common scenario: the landlord serves a defective notice, the tenant does not vacate by the termination date, the landlord files an eviction action, and the tenant raises the defective notice as an affirmative defense. If the defense succeeds, the action is dismissed and the landlord must serve a corrected notice and start over. The tenant typically remains in possession during the do-over and may be entitled to attorney’s fees if the lease has a fees clause.
Anti-retaliation damages
If the non-renewal was retaliatory under C.R.S. § 38-12-509 (issued in response to protected tenant conduct, such as habitability complaints, code-enforcement contacts, or tenant-union activity), the tenant can recover actual damages, attorney’s fees, and statutory penalties. The presumption of retaliation that attaches to a non-renewal following protected conduct shifts the burden to the landlord to prove a non-retaliatory reason.
Fair housing claims — federal FHA and Colorado fair housing law
A non-renewal that targets a tenant based on a protected class violates state and federal fair housing law independent of any notice-period issue. Remedies include actual damages, statutory penalties, attorney’s fees, and injunctive relief. HUD accepts complaints; private actions are also available.
Constructive eviction and quiet-enjoyment claims
A non-renewal that is part of a pattern of harassment — repeated baseless notices, threats, illegal entry, utility shutoffs — supports a constructive-eviction claim and a breach of the implied covenant of quiet enjoyment. These claims provide damages independent of the notice itself and can be raised in any eviction action or in a separate civil action.
Bottom line for landlords: the cost of getting a non-renewal notice right is small; the cost of getting it wrong can be substantial. A defective notice typically delays recovery of possession by several months (during the redo plus any eviction proceeding), exposes the landlord to attorney’s fees, and may trigger fair-housing or retaliation claims if the defects suggest bad faith. The form on this page handles the mechanics; the analysis above is the legal context.
Get the full Colorado landlord-tenant picture
Notice of Non-Renewal is one of the highest-stakes routine documents in California landlord-tenant practice. Our California habitability law guide and tenant-rights guide cover the broader framework — implied warranty of habitability, repair-and-deduct remedies, retaliation protections, and the operational rhythm of California residential tenancy.
Read Colorado habitability lawsColorado statute reference table
| Statute | Subject | Key requirement |
|---|---|---|
| C.R.S. § 13-40-107 | Termination notice for periodic tenancies | 21 days written notice |
| C.R.S. § 13-40-108 | Service of termination notices | Personal delivery, substituted service plus mailing, posting plus mailing |
| C.R.S. § 38-12-509 | Anti-retaliation | Prohibits non-renewal in retaliation for protected tenant conduct |
| C.R.S. § 38-12-1301 et seq. (HB 23-1098) | Just-cause requirement | Qualifying ground required for non-renewal of covered tenancies |
| 42 U.S.C. § 3601 et seq. | Fair Housing Act — federal | Federal-level fair housing protections; HUD enforcement |
| Local ordinances | City-level requirements | Denver Anti-Eviction Ordinance, Boulder |
Colorado statute citations are to the official code as referenced. Local ordinances may layer additional requirements on top of state law and should be consulted independently.
Frequently asked questions
How much notice do I have to give to non-renew a Colorado tenancy?
Do I need to give a reason for non-renewing the tenancy?
How do I serve the notice?
What happens if my fixed-term lease expires?
Can a tenant waive the notice period in advance?
What if the tenant has been a long-term resident?
What happens if my notice is defective?
Can I issue a non-renewal in retaliation for a tenant complaint?
Does a non-renewal need to be in writing?
What if my lease specifies a different notice period?
When to consult an attorney
Most Colorado non-renewals are routine and never need an attorney. If the tenant has raised retaliation or fair-housing claims, the property is in a city with a local just-cause ordinance, the tenancy involves long-term occupants or complicated lease history, or you suspect the tenant may contest the notice, consult a Colorado landlord-tenant attorney before serving. A clean § 13-40-107 procedure with documented service and contemporaneous file records is the foundation of a defensible non-renewal; an attorney’s review at the right moment is far cheaper than defending a defective notice in eviction proceedings.
Browse Colorado landlord guides
Published by Tenant Screening Background Check
Established 2004 · 20+ Years · All U.S. States & Territories · Statute-Based · Attorney-Reviewed
A Private Eye Reports™ service trusted by landlords, property managers, and attorneys.
Sources cited on this page
- California Civil Code § 1946.1 (termination notice periods — 30 / 60 days)
- California Civil Code § 1946.2 (Tenant Protection Act of 2019 / AB 1482 — just cause requirement)
- California Civil Code § 1946.2(b)(1) (eleven enumerated at-fault just-cause grounds)
- California Civil Code § 1946.2(b)(2) (four enumerated no-fault just-cause grounds — owner move-in, Ellis withdrawal, government order, substantial remodel)
- California Civil Code § 1946.2(d) (relocation-assistance requirement for no-fault terminations)
- California Civil Code § 1946.2(e) (exemptions from AB 1482 — single-family / condo / duplex / under-15-years / dorms)
- California Civil Code § 1946.2(g) (misuse damages — treble damages plus attorney’s fees)
- California Civil Code § 1162 (authorized methods of service for termination notices)
- California Civil Code § 1942.5 (anti-retaliation — 180-day presumption)
- California Government Code § 12955 et seq. (Fair Employment and Housing Act — state fair housing)
- 42 U.S.C. § 3601 et seq. (federal Fair Housing Act)
- California Government Code § 7060 et seq. (Ellis Act — withdrawal-from-market procedure)
- Los Angeles RSO / JCO (city-level just-cause and relocation requirements)
- San Francisco Rent Ordinance (city-level just-cause and relocation requirements)
- Oakland Just Cause for Eviction Ordinance (city-level just-cause requirements)
- California Civil Code § 1951.3 (abandonment procedure)
- California Civil Code § 1940.2 (anti-harassment; statutory penalties up to two thousand dollars)
- California Civil Code § 1942.5 (retaliatory eviction prohibition)
- California Civil Code § 1941 (implied warranty of habitability — repair obligation)
- California Civil Code § 789.3 (self-help eviction prohibition; statutory per-day damages)
- Implied covenant of quiet enjoyment (common law; every California residential lease)
- California Constitution Article I § 1 (privacy)
- Local ordinances: San Francisco, Berkeley, and other cities with rent-control or just-cause requirements that may affect entry rules
This form and the accompanying guidance are provided for general informational purposes only and do not constitute legal advice. Colorado landlord-tenant law has technical requirements that can change with legislation and case law. C.R.S. § 13-40-107 and related provisions vary in interpretation by jurisdiction and over time. Specific situations — long-term tenancies, fixed-term leases with renewal-notice clauses, retaliation and fair-housing defenses, local ordinance overlays — depend on facts that this general guidance cannot fully address. Always verify current requirements with the Colorado statute book, applicable local ordinances, or a qualified Colorado landlord-tenant attorney before relying on this notice in any contested or sensitive situation. Review Colorado eviction notice laws.
