Picture an older commercial building on an infill lot in a Western Slope town. The developer wants apartments upstairs and retail below. The current code calls for more parking than the lot can hold. The building also sits closer to the street than today’s setbacks allow. Colorado infill development legal questions often start right here, where an old building meets a newer code.
Since 2024, Colorado has passed state laws that override some local housing rules. Those laws change the answer in some cities and not in others. A site in Fruita may follow different rules than a similar site in Montrose. The first step is knowing which rules reach the parcel.
Why Infill Projects Run Into Ordinance Conflicts
Infill development builds on land inside an existing town. The lot often already has a building or a past approval. Most zoning codes were written with vacant land in mind. An infill lot brings history the code did not plan for.
Common conflicts show up in a few places:
- Setbacks. Older buildings often sit closer to property lines than the current code allows.
- Parking. Many codes require more off-street spaces than a small urban lot can fit.
- Density and height. A redevelopment plan may need more units or height than the zone permits.
- Use. A building may house a use the current zone no longer lists.
That last conflict creates a nonconforming use. A legal nonconforming use is one that was allowed when it started but no longer fits the current code. The use can usually continue, with limits.
Each local code sets its own rules for nonconforming uses and structures. Those rules often cover how much the use can expand and when the status ends after the use stops. Read the specific code before planning any change to a nonconforming building. Confirm how a new use or an addition would affect the protected status before committing to a design.
State Housing Laws That Now Override Local Codes
Several Colorado zoning laws passed in 2024 and 2026 now override local housing rules. Each one applies to a different set of places. Most reach only the Front Range and the Grand Valley. Many Western Slope sites still run mainly on local code.
| Law | What it Bars or Requires | Where it Applies (as of October 2026) |
|---|---|---|
| HB24-1007 | Bars occupancy limits based on family relationship [1] | Every Colorado city, town, and county [1] |
| HB24-1152 | Requires one ADU wherever a single-unit home is allowed, approved without a public hearing [2] | Cities in a metropolitan planning organization (MPO) with 1,000 or more people [2] |
| HB24-1304 | Bars minimum parking for new multifamily and for residential adaptive reuse [3] | MPO areas inside mapped transit service areas [3] |
| HB24-1313 | Sets housing capacity goals near transit [4] | 32 listed communities, all on the Front Range [4] |
HB24-1007
Took effect July 1, 2024 [1]. Local governments may still set occupancy limits tied to building codes, fire codes, and water and wastewater standards [1].
HB24-1152
Covers internal, attached, and detached ADUs [2]. On the Western Slope, DOLA lists Grand Junction, Fruita, and Palisade as subject jurisdictions [2]. Montrose, Delta, Ridgway, Telluride, Aspen, and Gunnison are not on that list [2]. The law also reaches private rules. Under C.R.S. 38-33.3-106.5, HOA provisions that restrict ADUs are void, though an HOA may still apply reasonable restrictions [2].
HB24-1304
Been in effect since June 30, 2025 [3]. It covers new multifamily buildings and the multifamily part of a mixed-use project [3]. It also covers adaptive reuse of an existing building [3]. The reuse must be fully residential or mixed-use with at least 50 percent residential [3]. Grand Junction is not among the 49 jurisdictions DOLA lists [3].
The parking law leaves some local tools in place. Developers may still choose to build parking [3]. Local governments may still require accessible spaces, EV charging under the state model code, and bicycle parking [3]. The law has one narrow exception [3]. It covers projects with 20 or more units and regulated affordable housing [3]. For those, a local government may require up to one space per unit [3]. It must publish findings within 90 days of a complete application, backed by parking data and an engineer’s review [3].
HB24-1313
Asks 32 transit-oriented communities to zone for set housing capacity near transit [4]. No Western Slope town is on the list [4]. Each community must meet its housing goal by December 31, 2027 [4].
Colorado’s 2026 HOME Act adds a separate path for housing on small parcels owned by public and nonprofit groups. It applies in jurisdictions with more than 2,000 people. EMH Law’s post on Colorado’s 2026 HOME Act covers who qualifies and when it takes effect.
DOLA maintains a Multilaw Applicability map and spreadsheet to check which laws apply in a specific place [2]. Check it for each site, since the lists can change.
Reading Which Rule Controls on Your Site
The controlling rule depends on four layers. Check them in this order:
- State law. Confirm which state housing laws reach the jurisdiction and the specific parcel.
- The local land use code. Read the zoning district, any overlay districts, and any historic district rules.
- Existing approvals on the parcel. A planned unit development, past variance, or recorded site plan may set its own rules.
- Recorded covenants. The title commitment lists covenants and restrictions recorded against the land.
Each layer can narrow what the one above it allows. A state law may bar a parking minimum, while the land use code still controls setbacks and height. A past approval may lock in a site layout. A recorded covenant may restrict use in ways the zoning code does not.
Private covenants and public zoning are separate systems. Zoning approval does not by itself release a parcel from a recorded covenant. The ADU statute above is a specific exception for HOA rules on ADUs [2].
For larger projects, this review belongs early in land use and zoning analysis, before the purchase contract’s deadlines pass.
Four Tools for Resolving an Ordinance Conflict
When a site conflicts with the code, Colorado gives developers four main tools. Each one fits a different kind of problem.
Variance
A variance relaxes a specific code requirement for one property. C.R.S. 31-23-307 sets the standard for municipal boards of adjustment [5]. A board may vary the rules where “practical difficulties or unnecessary hardships” make strict compliance hard [5]. The variance must keep the spirit of the ordinance and protect public safety and welfare [5].
Approving a variance usually takes four concurring votes of the board, unless the local ordinance sets a different number [5]. Expect the board to ask why the code cannot be met on this property. A district court can review the board’s decision by certiorari [5].
Rezoning or Planned Unit Development
Some conflicts are too large for a variance. A project that needs a different use or much higher density may need a zoning change instead.
There are two common routes. A rezoning moves the parcel into a different zone district. A planned unit development sets custom standards for a specific project through its own approved plan. Both routes go through public hearings and take longer than a variance. They also give the developer a set of rules written for the actual site.
State law also reaches into some of these approvals. In subject jurisdictions, a local government cannot restrict ADUs inside a planned unit development more than it does elsewhere [2]. Confirm an older PUD’s limits still hold before relying on them in a project budget.
Vested Rights
Vested rights lock in the rules for an approved plan. C.R.S. 24-68-103 governs how these rights arise [6]. A vested right attaches when a local government approves a site-specific development plan after notice and a public hearing [6]. The right lets the owner build under that plan [6]. The local government must publish notice of the approval within 14 days [6]. Deadlines for referendum and court challenges start only after that notice runs [6].
Local governments decide by ordinance which approvals count as site-specific development plans [6]. Zoning that is not part of such a plan creates no vested right [6]. Under C.R.S. 24-68-104, the right lasts three years by default [7]. A development agreement can set a longer period for phased or large projects [7]. That agreement is adopted as a legislative act, so it is subject to referendum [7].
Two limits come with the right. Amending the plan does not extend the three years unless the local government expressly allows it [7]. The local government can also still review the work later to confirm it matches the approved plan [7].
Vested rights matter on infill projects because codes keep changing. A three-year window can carry a project through financing and construction under the rules under which it was approved.
Appeals
When a local body denies an application or imposes a condition, the decision can be challenged in district court. Under C.R.C.P. 106(b), the complaint must be filed within 28 days after the final decision [8]. When the 28th day falls on a weekend or legal holiday, the deadline moves to the next business day [8].
A late filing is fatal. The Colorado Supreme Court has treated the Rule 106 filing deadline as jurisdictional [9]. A late complaint must be dismissed [9]. In that case, the decision became final when the county issued its written resolution [9]. The earlier oral vote did not start the clock [9].
Start an appeal review as soon as the county issues a decision. EMH Law handles zoning appeals and administrative challenges for developers when approvals are denied or conditioned.
Plan Your Colorado Infill Development Legal Strategy Before You Buy
Infill sites carry old buildings, old approvals, and codes that may or may not reach them. The order of checks matters: state law, local code, past approvals, then covenants. A sound Colorado infill development legal review happens before the contract goes hard, while the buyer can still walk away.
E. Michael Hoffman advises developers, brokers, and lenders on zoning, land use, and redevelopment across the Western Slope and throughout Colorado. Clients work directly with Hoffman from the first review through approvals. Contact Michael to review the rules that apply to your next infill site.
This article is general information about Colorado law and is not legal advice. The rules for any infill project depend on the specific property, its jurisdiction, and its history. Consult a Colorado real estate and land use attorney about your particular situation.
References
- https://dlg.colorado.gov/guidance-on-hb-24-1007-concerning-residential-occupancy
- https://dlg.colorado.gov/accessory-dwelling-units
- https://dlg.colorado.gov/parking-minimums
- https://dlg.colorado.gov/transit-oriented-communities
- https://colorado.public.law/statutes/crs_31-23-307
- https://colorado.public.law/statutes/crs_24-68-103
- https://colorado.public.law/statutes/crs_24-68-104
- https://www.coloradojudicial.gov/system/files/opinions-2026-04/24CA1860-PD.pdf
- https://www.coloradojudicial.gov/sites/default/files/2024-05/09SC697.pdf