Colorado is one of the most tenant-protective states in the country, and its landlord-tenant rules changed significantly in recent years. Two changes matter most: since August 7, 2023, a landlord cannot require a security deposit larger than two months’ rent (C.R.S. § 38-12-102.5), and House Bill 25-1249, effective January 1, 2026, rewrote how deposits must be returned (C.R.S. § 38-12-103).
State law sets the floor, but cities such as Denver, Boulder, Fort Collins, and Lakewood add their own tenant protections — including just-cause eviction rules in some jurisdictions. Before you sign or draft a Colorado agreement, understand both layers. A lease cannot waive a tenant’s non-waivable statutory rights, so a clause that conflicts with Colorado law is unenforceable even if both parties signed it.
This guide summarizes the rules that most often cause disputes in Colorado: deposits, pets, rent increases, disclosures, and eviction notices. It is general information, not legal advice — for a specific situation, consult a Colorado attorney or Colorado Legal Services.
| Governing law | C.R.S. Title 38, Article 12 (Tenants and Landlords) |
|---|---|
| Security deposit cap | 2 months’ rent (C.R.S. § 38-12-102.5) |
| Deposit return deadline | 30 days after move-out, up to 60 days if the lease says so (HB 25-1249) |
| Pet deposit / pet rent caps | $300 deposit; $35/month or 1.5% of rent (C.R.S. § 38-12-106) |
| Rent increase notice (no written lease) | At least 60 days (C.R.S. § 38-12-701) |
| Nonpayment notice to quit | At least 10 days (C.R.S. § 13-40-104) |
Colorado Rental Law at a Glance
Colorado residential tenancies are governed by Article 12 of Title 38 of the Colorado Revised Statutes, which covers security deposits, late fees, notice requirements, termination, and prohibited lease provisions. Eviction procedures live in C.R.S. §§ 13-40-101 through 13-40-123. Federal law (such as the lead-based paint disclosure rule) applies on top of state law.
Because local ordinances can be stricter than state law, a Denver lease and a rural Colorado lease may legally differ even though both are “Colorado” agreements. When a lease term conflicts with a non-waivable statutory or local right, the law controls. That is why a well-drafted Colorado agreement references both the governing statute and any applicable local requirements rather than copying a generic national template.
Security Deposits in Colorado After the 2026 Reform
The deposit rules changed dramatically on January 1, 2026, when HB 25-1249 took effect. Under the revised C.R.S. § 38-12-103, a landlord must return the full security deposit within 30 days after the lease ends or the premises are surrendered — unless the lease specifies a different return period, which cannot exceed 60 days.
Landlords may no longer retain any portion of a deposit for “normal wear and tear” or for any damage or defective condition that preexisted the tenancy. Retention is allowed only for unpaid rent and utility charges, other lawful charges listed in the lease, and necessary repairs for damage that exceeds normal wear and tear and did not preexist the tenancy.
Several other 2026 rules are easy to miss:
- ✓If the landlord withholds anything, they must give the tenant a written statement; within 14 days of a tenant’s request, the landlord must provide all documentation in their possession — photos, inspection forms, receipts, invoices, or estimates — supporting the retention.
- ✓No deductions for repainting the unit’s interior, and carpet may be deducted only for substantial, irreparable damage that did not preexist the tenancy — and not at all if the carpet is more than 10 years old.
- ✓If the landlord misses the return deadline or fails to send the required notice, they waive any right to retain any portion of the deposit.
- ✓Bad-faith retention exposes the landlord to treble (triple) damages. Before suing, the tenant must give the landlord 7 days’ written notice; the statute now spells out when withholding is deemed to be in bad faith.
- ✓Either party may request a walk-through inspection before move-out to document conditions exceeding normal wear and tear.
- ✓Practical tip for tenants: photograph the unit at move-in and move-out, and put your forwarding address in writing. Practical tip for landlords: do the move-out inspection, itemize every deduction with receipts, and return the balance on time — Colorado penalties for getting this wrong are among the steepest in the country.
Pet Deposits and Pet Rent in Colorado
Colorado caps pet-related charges by statute (C.R.S. § 38-12-106, effective January 1, 2024). A landlord may not demand more than $300 as an additional security deposit to allow a pet, and that deposit must be refundable. “Pet rent” is capped at $35 per month or 1.5% of the monthly rent, whichever is greater.
Service and assistance animals are not pets — a landlord may not charge pet deposits or pet rent for them, though the landlord may ask for documentation of the disability-related need under federal fair-housing rules. A Colorado pet addendum should state the deposit, any pet rent, the pet’s identifying details, and the tenant’s responsibility for damage and waste cleanup.
Rent Increases and Notice Requirements
Colorado has no statewide rent control, but it does regulate how much notice a landlord must give. Under C.R.S. § 38-12-701, in a residential tenancy with no written agreement, a landlord may increase rent only upon at least 60 days’ written notice. For a tenancy with a written lease, the lease controls — a fixed-term lease locks in the rent for the term, and an increase takes effect at renewal under whatever notice the lease requires (commonly 30–60 days).
Colorado also caps late fees by statute (C.R.S. § 38-12-105): a late fee may not exceed $50 or 5% of the monthly rent, whichever is greater, and a landlord must wait through a grace period before charging one. Tenants who receive a rent increase notice should confirm the notice is in writing, check the lease for the correct notice period, and negotiate or plan before the new rate takes effect.
Habitability, Required Disclosures, and Repairs
Colorado landlords owe an implied warranty of habitability: the property must be fit for human habitation, with working heat, plumbing, electricity, and structurally sound premises. Landlords must install and maintain smoke detectors and carbon monoxide detectors as required by state and local law. For housing built before 1978, federal law requires a lead-based paint disclosure form to be signed before the lease takes effect.
Colorado requires written agreements to disclose material lease terms, prohibits certain one-sided provisions, and regulates utility billing, including water usage disclosure rules (C.R.S. § 38-12-212.4 and related sections). Entry for repairs and inspections should follow the notice period stated in the lease; where the lease is silent, Colorado courts expect reasonable notice and entry at reasonable times. Tenants who report a serious repair issue in writing should keep a copy — a landlord who retaliates against a tenant for a good-faith complaint violates Colorado law.
Evictions and Termination in Colorado
Colorado eviction notices are short and formal. For nonpayment of rent, a landlord may terminate the tenancy with a written notice to quit of at least 10 days (C.R.S. § 13-40-104); other lease violations and holdovers have their own notice periods. If the tenant does not vacate, the landlord must file a forcible entry and detainer (FED) action in county court — self-help evictions, utility shut-offs, and lockouts are illegal in Colorado.
Some Colorado cities (including Denver and Boulder) have adopted just-cause eviction protections, meaning a landlord must have a legally valid reason and follow local notice rules even when state law would allow termination. A tenant who receives any notice to quit should respond in writing, check both state and local requirements, and contact Colorado Legal Services or a local tenant union immediately — deadlines are short and are not extended for tenants who ignore them.
Resolving Deposit and Lease Disputes
Most Colorado landlord-tenant disputes are handled in county court. Small claims divisions hear deposit and lease claims up to the current jurisdictional limit, which has been raised several times — confirm the current limit before filing. Tenants who win a deposit case may recover the withheld amount plus statutory damages and, in bad-faith cases, treble damages.
Start with a written demand letter that cites the statute and gives the landlord a deadline. If that fails, file in the county where the property is located. Free and low-cost help is available through Colorado Legal Services, and several counties run landlord-tenant mediation programs. Good documentation — the lease, photos, receipts, and written notices — wins these cases; vague claims rarely do.
Guide reviewed 2026-08-19. Rental laws change frequently; verify the current statute text before relying on any rule on this page. This information is not legal advice.