The Colorado Revised Statutes, which have governed the state's legal framework since their effective adoption in 1885, mandate that residential landlords provide specific pieces of information to tenants either explicitly within the lease agreement or as formalized addendums prior to move-in.

[!CAUTION] Advertising Transparency Rule: Under the Protections Against Deceptive Pricing Practices Act (HB 25-1090 / C.R.S. § 6-1-737), effective January 1, 2026, landlords must disclose the "total price" (including all mandatory, unavoidable fees) directly in their initial rental advertisements and lease agreements. Under C.R.S. § 6-1-737(2)(b), a landlord may only charge a payment processing fee if they also provide the tenant with at least one alternative payment method that does not require a fee.

Official Law Citation: The rules and regulations outlined on this page are strictly configured under the official Colorado Revised Statutes (C.R.S. Title 38)Preview unavailable.

Federal Mandatory Disclosures

1. Lead-Based Paint

Under the federal Residential Lead-Based Paint Hazard Reduction Act of 1992 (42 U.S.C. § 4852d), if your rental property was built before 1978, you must explicitly provide:

• An EPA-approved information pamphlet on identifying and controlling lead-based paint hazards.
• Any known information or specific reports regarding lead-based paint existing in the specific rental unit.
• A Lead Warning Statement integrated directly into the lease agreement, signed by both the landlord and tenant.

State Mandatory Disclosures

Colorado has recently expanded its disclosure requirements to include environmental hazards and fee transparency. Landlords must strictly adhere to the following statutory mandates:

1. Radon Gas Disclosure

Under SB 23-206 (codified at C.R.S. § 38-12-803), landlords must provide tenants with a specific bold-faced radon warning statement and the most recent radon educational brochure from the Colorado Department of Public Health and Environment (CDPHE) before signing a lease. Landlords must also disclose any known records of radon testing or mitigation systems at the property, and the tenant must sign an acknowledgment of this disclosure.

2. Bed Bug History (C.R.S. § 38-12-1005)

Upon request from a prospective tenant, a landlord must disclose in writing whether the dwelling unit contained bed bugs within the previous eight months. The landlord must also disclose the last date the unit was inspected and found to be free of bed bugs. Pursuant to C.R.S. § 38-12-1002, landlords are also prohibited from renting a unit they know contains an active bed bug infestation.

3. Methamphetamine Laboratory Disclosure

Under C.R.S. § 38-35.7-103, a landlord must disclose in writing if they have actual knowledge that the property was used as a methamphetamine laboratory. This applies to all "residential real property," which the statute explicitly defines to include rental properties and apartments. This disclosure is waived if the property has been state-certified as remediated to the standards set forth in C.R.S. § 25-18.5-102.

4. Identity and Address for Service

Per C.R.S. § 38-12-801(2), every written rental agreement must include the name and address of the landlord or the landlord’s authorized agent for the purpose of receiving notices and service of process. If the identity of the landlord or agent changes, the new party must provide written notice or post the new identity in a conspicuous location within one business day.

5. Warranty of Habitability

Under C.R.S. § 38-12-503, landlords implicitly disclose that the property is fit for human habitation. Pursuant to SB 24-094, all residential leases entered into or renewed on or after January 1, 2025, must include a statement in at least 12-point bold-faced type, in both English and Spanish, stating that the tenant is entitled to safe and healthy housing and that retaliation for reporting unsafe conditions is prohibited.

Local Ordinances

Cities like Denver and Boulder have additional requirements. For example, Denver landlords must provide a copy of their Residential Rental Property License and the city-mandated Tenant Rights and Resources document. Failure to comply with local licensing can result in fines and the inability to legally collect rent.

Centralize Your Disclosures

Failing to provide a lead-paint addendum or a radon disclosure can invalidate eviction attempts and lead to severe civil penalties. Landager allows you to attach required disclosures as mandatory, digitally signable addendums during your automated onboarding flow.

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How Landager Helps

Landager tracks lease terms, required compliance items, and accounting records - making it easy to stay compliant with Colorado regulations like the new HB 25-1090 transparency rules.

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