New Colorado Property Laws in 2026: What Boulder Landlords, Homeowners, and Buyers Need to Know

The real estate rules that govern a home do not change as often as prices or mortgage rates, but when Colorado passes new property laws, they affect every owner and renter in Boulder County. In 2026, a package of state laws took effect that changes how security deposits are collected and returned, how rental housing is advertised and screened, and how landlords must respond to assistance animal requests. This guide explains each change in plain language, ties it back to how these laws play out in Boulder, Broomfield, Erie, Lafayette, Longmont, Louisville, Superior, and Brighton, and gives owners and buyers a practical checklist for staying ahead of the new rules.

I have worked in Boulder real estate since 1990 and have guided more than 1,000 clients through buying, selling, and owning homes in this region. I am not an attorney, and nothing in this article is legal advice. After 34 years in this market, though, I know which law changes cause real friction in transactions, and these are the changes to watch in 2026.

An Overview of the 2026 Colorado Property Law Changes

Five laws matter most for Boulder property owners this year. Three took effect on January 1, 2026, and two more took effect in August 2026. Here is the whole package at a glance:

The same laws apply everywhere in the state, so a landlord in Boulder runs under the same rules as one in Broomfield or Longmont. The practical impact, however, is uneven. Boulder and the surrounding communities have some of the strongest rental demand in Colorado, driven by the University of Colorado, tech employment, and the appeal of living near the Flatirons. That demand is exactly why owners here need to understand the details.

Colorado's New Security Deposit Law (HB25-1249)

HB25-1249, the Tenant Security Deposit Protections Act, is the biggest change and the one most likely to affect a Boulder owner's bottom line. It rewrites how deposits are collected, held, and returned for residential leases across Colorado. Seattle-style tenant protections have been debated in Boulder for years, and this state law delivers a substantial share of them statewide.

A One-Month Cap on Deposits

A landlord may now collect at most one month's rent, or the tenant's prorated share, as a security deposit. That is down from the previous two-month limit. A separate pet deposit of up to $300 remains allowed, and assistance animals are exempt from deposit rules entirely, which connects directly to the assistance animal law discussed below.

Deposits Can Now Be Paid in Installments

Landlords must offer tenants the option to pay the security deposit in installments spread over at least six months, with no more than one payment per month. A missed installment can be recovered in a civil action, but it cannot be used as grounds for eviction. If you manage rentals in Boulder, your lease should spell out the installment option clearly so both sides know the schedule.

Normal Wear and Tear Is Now Legally Defined

The law finally defines "normal wear and tear" in statute: deterioration, damage, or uncleanliness that occurs from the use a rental unit is intended for, without negligence, carelessness, accident, or abuse by the tenant. Ordinary dirt and minor scuffs from day-to-day living now count as normal wear and tear. That means a landlord can no longer deduct for faded paint, worn carpet, or light marks that come from ordinary use.

Cleaning Deductions Shrink

Because ordinary uncleanliness is now defined as normal wear and tear, an owner may withhold for cleaning only when the unit is substantially less clean than it was at move-in. Lease clauses that charge tenants for cleaning or repairs caused by normal wear and tear, or for damage that existed before the tenancy, are void under the new law. In practical terms, the standard move-out "cleaning fee" has largely disappeared unless the home was left in genuinely bad shape.

A Tighter Return Deadline and Itemized Statements

Deposits are treated as tenant property held in trust by the landlord, and the landlord carries the burden of proof on any deduction. The deposit must be returned within 30 days of lease termination and surrender of the unit. If any amount is withheld, the landlord must provide a written, itemized statement of deductions with supporting documentation such as invoices or photos. Miss that deadline or skip the documentation, and the right to withhold at all can be forfeited.

Permitted deductions are limited to unpaid rent, unpaid utilities, other lawful lease charges, and necessary repairs for damage beyond normal wear and tear that did not exist before the tenancy. A wrongfully demanded or retained amount must be returned within 7 days of the tenant's written demand, and failure to do so can expose the landlord to treble damages, meaning three times the amount wrongfully withheld.

The Move-Out Inspection Option

A landlord must now offer a pre-move-out walk-through inspection, in person or by video, when a tenant requests one. The inspection identifies damage beyond normal wear and tear before the tenant moves, so both sides know where things stand. For landlords, offering and documenting this walkthrough is one of the simplest ways to avoid a dispute at the finish line.

One Price in Every Ad: HB25-1090

Under HB25-1090, landlords must advertise a single price that includes all required fees and charges. The rent a tenant sees in a listing or on a website is the total they can expect to pay, with no add-on or separate charges revealed later in the process. The law also restricts how utility costs can be passed through to tenants.

For renters comparing units across Boulder, Louisville, or Erie, this makes shopping honest: the advertised number is the real number. For owners, the task is to audit every listing. If an ad quotes one rent and a lease addendum introduces a separate fee, that structure may now violate state law.

Fairer Tenant Screening: HB25-1236

HB25-1236 changes what a landlord may ask from one specific group of applicants: tenants who use a housing subsidy such as a Section 8 voucher. A landlord cannot require a subsidized applicant to submit a credit history report, a credit score, or adverse credit events in a portable tenant screening report.

This does not mean screening disappears. Landlords can still verify rental history, references, income consistent with the subsidy, and other lawful criteria. But the credit-history shortcut is off the table for subsidized applicants. Given how competitive Boulder County's rental market is, this rule meaningfully widens access for voucher holders looking at homes in Superior, Lafayette, and Longmont as well as the city itself.

Assistance Animals and Application Disclosures

Two laws took effect in August 2026. HB26-1045 codifies protections for tenants with disabilities who need emotional support or assistance animals, making clear that a reasonable accommodation request cannot be treated as a pet-policy violation. HB26-1196 adds disclosure duties on the application side: a housing provider must disclose who is performing the applicant screening and how screening and eviction data is collected and protected.

For tenants with disabilities, the practical step is to submit accommodation requests in writing and keep a record of the exchange. For property managers and owners, the practical step is to add the required disclosures to application forms and train staff on how assistance animal requests are handled, consistent with fair housing law.

The Written Broker Agreement Law: HB26-1426

You may have seen headlines about Colorado's new written brokerage agreement rule. Since August 12, 2026, a broker must establish a transaction-broker or single-agency relationship through a written agreement before performing licensed services such as market advice, negotiations, or writing an offer. Consumers are also advised to consult a licensed attorney when a builder is a party to the contract.

I wrote a full explainer on how this rule works for Boulder buyers and sellers in my guide to buyer's agent commissions in 2026, so I will not repeat the whole analysis here. The short version: expect to sign a written agreement before your agent's licensed work begins, and make sure the compensation terms in that agreement match what you actually discussed.

What the New Laws Mean for Boulder Buyers and Sellers

These are rental laws, but they have a real footprint in the sale and purchase of property. Anyone buying or selling a home in Boulder in 2026 should plan for the deposit rules to show up at closing.

Buying a Property with a Tenant in Place

When you buy a rental property, you inherit the tenants, the leases, and the deposits tied to those tenancies. Under the new law, deposits are tenant property held in trust, and the ownership change triggers specific transfer and return obligations. Before closing on a duplex in Newlands or a rental near the CU campus, ask the seller for a full itemized accounting of every tenant deposit, including how long each has been held and what walkthrough documentation exists. A small purchase-side review now prevents a costly dispute later.

Selling a Tenant-Occupied Property

Sellers of tenant-occupied homes in Boulder, Lafayette, Erie, or Longmont should prepare a deposit ledger before marketing the property. Buyers and their agents will ask for it, and a clean, documented file makes the transaction smoother. If you are selling a unit you have rented out for years, this is also the moment to audit your own practices against the January rules, because a buyer may review your lease forms as part of due diligence.

Inherited and Probate Properties

A version of the same problem shows up in probate. When a property owner passes away and a home comes to heirs, any rental deposits held by the estate need to be accounted for alongside the mortgage, insurance, and utilities. As a Certified Probate Realtor, I routinely walk families through inherited properties, and the deposit rules are one more reason to have an experienced guide when an estate includes a tenant-occupied home.

Landlords Across Boulder County

The practical weight of these laws lands on owners wherever rentals concentrate: older single-family homes near the university, mountain-area rentals around Sugarloaf, newer rental and duplex stock in master-planned communities like Renaissance in Erie, and the condo and townhome markets across Broomfield, Superior, and Louisville. The compliance work, an updated lease, an installment option, a documented walkthrough process, and an honest ad, is identical everywhere, and the owners who handle it first will have the fewest problems.

A Compliance Checklist for Boulder Property Owners

Here is a practical checklist to bring your leases, ads, and processes in line with the 2026 rules:

• Cap deposits at one month's rent. New leases should not collect more than one month's rent (or the prorated share) as a security deposit, with a pet deposit of up to $300 as the only separate allowance for pets.
• Offer installment payments. Let tenants spread the deposit over at least six months, no more than one payment per month.
• Offer the pre-move-out walkthrough. Provide an in-person or video inspection when a tenant requests it, and document the condition findings.
• Return deposits within 30 days. Itemize every deduction with supporting invoices or photos, or forfeit the right to withhold.
• Advertise one all-in price. Audit every listing and remove separate or add-on fees from the advertised number.
• Remove credit-history requirements for subsidized applicants. Drop credit report and score requests from portable screening packages for voucher users.
• Disclose screening practices. Add the HB26-1196 disclosures to your application so applicants know who screens them and how their data is protected.
• Handle assistance animal requests consistently. Treat reasonable accommodation requests as a fair housing matter, never as a pet-policy violation.
• Update your lease with a Colorado attorney. These rules interact, and a current Colorado lease form is cheaper than a dispute.

Frequently Asked Questions About Colorado's 2026 Property Laws

Key Takeaways

• HB25-1249 caps Colorado security deposits at one month's rent, down from two months, and requires landlords to offer installment payments spread over at least six months.
• Normal wear and tear is now defined in statute, so minor scuffs, faded paint, and ordinary carpet wear can no longer be charged to tenants.
• Cleaning deductions are limited to units left substantially less clean than at move-in, and lease clauses charging for normal wear and tear are void.
• Deposits are tenant property held in trust and must be returned within 30 days with a written itemized statement and supporting documentation, or the right to withhold can be forfeited, with treble damages possible for wrongful withholding.
• HB25-1090 requires one all-in advertised price for rentals, HB25-1236 bars credit-history requirements for subsidized applicants, and HB26-1045 and HB26-1196 protect assistance animals and require screening disclosures.
• Buyers of tenant-occupied properties and sellers of rentals should review deposit ledgers and lease forms at closing, a point that matters in probate sales of inherited homes.
• Separately, HB26-1426 has required written broker agreements before licensed services since August 12, 2026; see the commissions guide for the full breakdown.
• These are statewide rules, but with Boulder County's strong rental demand, owners across Boulder, Broomfield, Erie, Lafayette, Longmont, Louisville, Superior, and Brighton feel them first.
• AJ Chamberlin brings 34+ years of Boulder real estate experience, 150+ renovations, and Certified Probate Realtor credentials to owners, buyers, and sellers navigating the 2026 rules.