Colorado home rule cities are municipalities that govern themselves under a locally adopted charter rather than under the general rules the state legislature writes for other cities. The authority comes from Article XX of the Colorado Constitution, and it gives these cities the final word on genuinely local matters, including how their government is structured, how they tax, and how they regulate land use. Colorado has 108 home rule municipalities, and the practical difference from a statutory city is large: a statutory city can only do what the legislature has expressly authorized, while a home rule city can act on any local matter its charter doesn’t forbid.
Where the Authority Comes From
Article XX of the Colorado Constitution, adopted in 1902, is the foundation. Section 6 gives residents of qualifying cities and towns the “power to make, amend, add to or replace the charter of said city or town, which shall be its organic law and extend to all its local and municipal matters.”1Colorado General Assembly. Colorado Constitution Article XX The framers wanted to insulate local government from state legislative interference, and that purpose still shapes how courts read the article today.
The central legal test is whether an issue is one of “local concern” or “statewide concern.” If it is purely local, the home rule charter and its ordinances override any conflicting state statute. If it is statewide, state law wins. Many disputes sit in the middle ground, where courts weigh whether uniformity across cities matters more than local flexibility. In City and County of Denver v. State (1990), the Colorado Supreme Court reaffirmed that home rule cities have supremacy over local matters but must yield when the state has a legitimate interest in regulating an issue uniformly.2Justia Law. City and County of Denver v. State (1990) The dividing line keeps moving, and litigation over it never really stops.
How a City Becomes Home Rule
Any Colorado city or town with at least 2,000 residents can start the process. The council or board of trustees puts a charter convention question on the ballot. If voters approve, they elect a charter commission. The commission has 180 days to write a draft, and that draft goes back to voters for ratification by majority vote.3Colorado General Assembly. Colorado Constitution Article XX Section 9
The charter is the city’s constitution. It sets the structure of the council, the powers of elected officials, how ordinances get passed, and how the city handles its finances. One conceptual point worth pausing on: a home rule charter is a document of limitation, not authorization. A statutory city starts with no power and receives only what the legislature grants. A home rule city starts with inherent authority over local matters and uses its charter to draw the boundaries. Anything the charter doesn’t restrict, the city can do.
Existing state statutes don’t vanish the day a charter takes effect. Article XX, Section 6 says state laws “continue to apply to such cities and towns, except in so far as superseded by the charters of such cities and towns or by ordinance passed pursuant to such charters.” Supersession only happens when the city actually adopts something that conflicts with a state statute. Until it does, the old rules stay in force.
Amendments come from two directions. The council can put a proposal on the ballot by ordinance, or citizens can gather signatures on a petition to do the same. Either way, a majority of voters has to approve.4Justia Law. Colorado Code 31-2-210 – Procedure to Amend or Repeal Charter Some amendments are small procedural tweaks. Others reshape whole branches of city government, including switching from a mayor-council to a council-manager structure.
What Home Rule Cities Can Do That Statutory Cities Can’t
Statutory municipalities draw their authority from Title 31 of the Colorado Revised Statutes, which prescribes everything from governance models to election timing. They have to adopt one of a few approved structures and follow uniform state rules on budgeting, personnel, and contracts. Home rule cities design their own systems.
- Government structure: statutory cities are limited to mayor-council or trustee models with state-prescribed terms and roles; home rule cities can create council-manager systems, hybrids, or arrangements of their own design.
- Planning commissions: state law caps statutory municipalities at five to seven planning commission members; home rule cities set their own size.
- Subdivision authority: statutory cities follow a standard state framework for how land is divided; home rule cities write their own subdivision procedures, and those vary widely from one city to the next.
- Tax collection: statutory cities rely on the Colorado Department of Revenue to collect their local sales tax; many home rule cities collect their own, with separate licensing, filing, and audit systems.
The flexibility comes with a cost. Home rule cities have to build and maintain administrative machinery that statutory cities hand off to the state. Running an independent sales tax operation, for example, takes staff, software, and enforcement capacity, and smaller municipalities sometimes struggle to sustain it.
Home rule cities also define their own legislative processes. They can pass emergency ordinances without extended waiting periods, streamline zoning decisions, and create specialized municipal courts. Courts have consistently upheld this authority when the subject is genuinely local.
Taxation and the TABOR Ceiling
The power to design and collect taxes is where home rule status makes the biggest practical difference. Home rule cities can impose sales taxes, property taxes, lodging taxes, impact fees, franchise fees on utilities, and excise taxes on specific goods. Several have levied special taxes on marijuana sales.5Colorado General Assembly. Marijuana Revenue in the State Budget They can also use tax increment financing to fund redevelopment, capturing future property tax growth to pay for infrastructure without raising existing rates.
Self-Collected Sales Tax
Under Colorado Revised Statutes Section 29-2-106, home rule municipalities administer their own sales taxes unless they ask the Department of Revenue to do it for them.6Department of Revenue – Taxation. Local Government Sales Tax Self-collecting cities set their own rules on which goods and services are taxable, maintain their own licensing requirements, and conduct their own audits.
For businesses selling across the state, this creates real compliance work. A company operating in multiple Colorado jurisdictions may need separate sales tax licenses from each self-collecting home rule city, file separate returns on different schedules, and apply different taxability rules in each. Colorado’s Sales and Use Tax System (SUTS) portal offers a single point of remittance for participating jurisdictions, but not every self-collecting city has joined.7Department of Revenue – Taxation. Sales and Use Tax System (SUTS) Information
TABOR Still Applies
Home rule cities are not exempt from the Taxpayer’s Bill of Rights, despite a common misconception. TABOR is a constitutional amendment that applies to every Colorado government, and cities cannot opt out. Any new tax or tax rate increase requires voter approval, and annual revenue growth is capped.8Department of Revenue – Taxation. TABOR Where home rule cities have more room is in designing tax structures and in asking voters to “de-Bruce,” a voter-approved exemption from TABOR’s revenue caps that lets the city keep and spend revenue above the limit instead of refunding it.
Another workaround is the enterprise exemption. A government-owned business that can issue its own revenue bonds and receives less than 10 percent of its annual revenue from government grants qualifies as an “enterprise” outside TABOR’s limits. Home rule cities have used this structure for utilities and stormwater systems, letting those services charge fees and retain revenue without triggering TABOR’s voter-approval rules. The entity cannot have the power to levy a tax, and courts examine whether its activities resemble something commonly done for profit in the private sector.9Colorado LegiSource. Creating an Enterprise Pursuant to TABOR
Where State Law Still Wins
Home rule authority is broad but not unlimited. The Colorado Supreme Court has repeatedly drawn lines where the state’s interest in uniformity overrides local charters.
Firearms regulation is preempted by state law, and courts have upheld that preemption on the ground that gun rules need a consistent statewide framework. Oil and gas drilling is another area where home rule has lost. In City of Longmont v. Colorado Oil and Gas Association (2016), the Supreme Court struck down a citywide fracking ban that Longmont voters had added to their charter, holding that state oil and gas regulation preempted the local prohibition.10Justia Law. City of Longmont v. Colorado Oil and Gas Association (2016) Rent control tells a similar story. In Town of Telluride v. Lot Thirty-Four Venture, LLC (2000), the court invalidated a Telluride ordinance requiring developers to create affordable housing, holding that it amounted to rent control prohibited by state statute.11Justia Law. Town of Telluride v. Lot Thirty-Four Venture, LLC (2000)
Local minimum wage laws, on the other hand, are permitted. In 2019, the legislature passed HB 19-1210, repealing the ban on local minimum wage ordinances and letting cities set wages above the state floor.12Colorado General Assembly. HB19-1210 Local Government Minimum Wage Denver set its 2026 minimum wage at $19.29 per hour compared with the statewide rate of $15.16.13Department of Labor and Employment. Labor Standards and Statistics – Annual Minimum Wages The law caps annual local increases at $1.75 or 15 percent, whichever is higher, so cities can’t leap far ahead of the state rate in a single year.
The pattern across these cases is worth understanding. Home rule authority is strongest when a city is regulating something with no spillover beyond its borders. The more an issue touches neighboring jurisdictions, statewide industries, or constitutional rights, the more likely a court is to side with the state.
The Current Housing Density Fight
The most active conflict right now is over housing density. In 2024, the legislature passed two bills that override local zoning in home rule cities. HB 24-1304 bars municipalities from enforcing minimum parking requirements for multifamily housing near transit. HB 24-1313 requires 32 Front Range municipalities to allow densities of at least 40 dwelling units per acre in transit areas and eliminates public hearings on certain dense housing proposals.14City of Greenwood Village. Cities Sue State and Gov. Polis to Preserve Home Rule
Six home rule cities, Aurora, Arvada, Glendale, Greenwood Village, Lafayette, and Westminster, sued the state in 2025. They argue the laws violate Article XX by stripping municipalities of authority over land use, a subject traditionally treated as local concern. The suit also challenges an executive order by Governor Polis threatening to withhold grant funding from cities that don’t implement the new laws. The outcome could reshape the boundary between state and local power over zoning for years.
Citizen Initiatives and Referenda
Direct democracy is built into home rule governance. Residents can propose new laws through initiatives or challenge existing ordinances through referenda, both by gathering a threshold number of signatures to reach the ballot. These tools have shaped policy across Colorado’s home rule cities on everything from environmental rules to city finances.
The initiative process lets citizens draft legislation and send it directly to voters. What an initiative can actually accomplish depends on whether the subject falls within the city’s home rule authority. Boulder residents were long unable to ban plastic bags because state law preempted local plastic rules. That changed when the legislature passed the Plastic Pollution Reduction Act in 2021, which lifted the preemption effective July 2024 and allowed municipalities to enact rules as stringent as or more stringent than the state framework.15Colorado General Assembly. HB21-1162 Management of Plastic Products
Referenda work in the opposite direction, letting voters reject ordinances the council has already passed. If enough signatures are collected in time, the challenged law goes on the ballot for an up-or-down vote. Ballot language disputes, procedural challenges, and questions about whether an initiative exceeds the city’s home rule authority regularly end up in court, but the ability of residents to write, pass, and repeal local law remains one of the defining features of home rule in Colorado.