Building permits, zoning and land rules in Commerce City, Colorado

At a glance

Building permit

Commerce City issues building permits for new and altered residential and commercial buildings.¹

Building code

The city has adopted amended 2021 International Codes.⁴

Zoning

Yes; Commerce City's Land Development Code sets district-specific standards.²

Septic

Adams County Health Department permits and inspects onsite wastewater systems.³⁵

RV living

Generally not allowed unless the Land Development Code expressly permits it.⁶

Minimum home size

District-specific; an R-1 detached home has separate single-story and two-story minimums.⁷

Who to call

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Do you need a building permit in Commerce City, Colorado?

Commerce City issues building permits for new buildings and for alterations to existing residential and commercial buildings inside city limits.¹ The city has also adopted city-specific changes to the 2021 International Codes.⁴ Start with the Commerce City Building Safety Division before construction, because the city—not Adams County Building Safety—is the building-code authority for a project within Commerce City.¹ Building permit fees are based on the complete project valuation, plan-review fees are due with the application, and remaining fees are due before the building permit is issued.⁸

Who issues building permits in Commerce City, and how do you apply?

The Commerce City Building Safety Division issues building permits, reviews plans and handles contractor-licensing questions for work inside Commerce City.¹ Reach the division at 303-289-3790 or [email protected], or visit the South Platte Crossing Building at 7190 Colorado Blvd., 6th Floor.¹ Commerce City's online portal is eTRAKiT.¹ Before applying, identify the parcel's zoning and assemble plans that show the proposed work; the adopted building codes and district standards both shape the review.⁴² The city publishes building permit fees based on full project valuation, with other reviewing agencies able to charge additional fees.⁸

Does Commerce City have zoning, and what does R-1 zoning allow?

Commerce City has municipal zoning, and the applicable requirements depend on the parcel's zoning district.² In the R-1 single-family detached district, the minimum lot area is 7,000 square feet, increasing to 8,000 square feet for a corner lot.⁹ An R-1 single-story detached dwelling must contain at least 1,080 square feet of gross floor area, while a two-story detached dwelling must contain at least 1,600 square feet.⁷ R-1 building height runs from a minimum of 10 feet to a maximum of 35 feet.¹⁰ These figures are not citywide defaults; ask the Commerce City Planning Division to confirm the zoning, overlays and standards for the specific parcel.¹¹

How do septic permits work inside Commerce City?

For a Commerce City property that is not served by public sewer, the Adams County Health Department administers onsite wastewater permitting and inspection.³ Installation, expansion, and major or minor septic repairs require the county's septic-system permit application.¹² The application generally includes a septic design and soils report, and the Health Department issues the permit when the design complies with Regulation O-26.¹³ Near completion, the installer requests a final inspection; approval is needed before backfilling.⁵ Repairs that do not affect a septic tank, leach field, sewer line or effluent line can fall outside the permit requirement.¹⁴

Can you live in an RV or tiny home in Commerce City?

Commerce City's Land Development Code generally bars using an RV as living or sleeping quarters unless the code expressly permits the use.⁶ Residential-area street parking for an RV is unlawful, while loading or unloading is limited to less than 48 hours in a seven-day period with no occupancy, followed by at least 72 hours off the public right-of-way.⁶ Colorado can approve qualifying tiny homes for long-term living, but state approval remains subject to local zoning.¹⁵ We could not confirm a Commerce City rule that generally allows a tiny home on an ordinary residential parcel; ask the Planning Division about the parcel's district and proposed housing type before buying.¹¹

Building a home in Commerce City: what are the steps?

1. Ask the Commerce City Planning Division to identify the parcel's zoning district and the standards that apply to the proposed home.²¹¹

1. Design to Commerce City's amended 2021 International Codes and the applicable district dimensions.⁴

1. Apply to the Commerce City Building Safety Division through the city's online permitting portal and pay the plan-review fee.¹⁸

1. If public sewer is unavailable, obtain the septic design, soils report and Adams County Health Department septic permit before installation.¹³

1. Complete required city and septic inspections before occupying the home; the septic installer requests the county's final inspection near completion.¹⁵

What should you check before buying land in Commerce City?

Confirm that the parcel is actually inside Commerce City, then ask the Planning Division for its zoning district before relying on any setback, lot-size or dwelling-size figure.¹¹² For R-1 land, corner-lot status changes the minimum lot area, and building height and floor-area standards also apply.⁹¹⁰⁷ Ask the utility provider whether public sewer serves the site; otherwise, contact Adams County Health about a septic design and soils report.¹³ A new groundwater-diverting well requires a Colorado well permit, subject to basin-specific conditions.¹⁶ Direct access from a house to a state highway requires a state access permit.¹⁷

Watch-outs

• Do not use Adams County's unincorporated-area building or zoning rules for a parcel inside Commerce City; Commerce City administers its own zoning and building code.²¹
• An RV generally cannot serve as living or sleeping quarters in Commerce City unless the Land Development Code expressly allows it.⁶
• A Colorado-approved tiny home still must satisfy Commerce City zoning, and we could not confirm a general city rule allowing tiny-home occupancy on an ordinary lot.¹⁵¹¹

Sources

1. Commerce City Building Safety Division (c3gov.com)
2. Sec. 21-4300. R-1 Single-Family Detached Residential District (Commerce City), quoted and re-checked
3. Septic Systems, quoted and re-checked
4. Ordinance 2490 / 2021 Commerce City Building Code (Commerce City), quoted and re-checked
5. Septic Systems, quoted and re-checked
6. Sec. 21-7240. Use of Required Off-Street Parking Areas (Commerce City), quoted and re-checked
7. Sec. 21-4300. R-1 Single-Family Detached Residential District (Commerce City), quoted and re-checked
8. Fees (Commerce City), quoted and re-checked
9. Sec. 21-4300. R-1 Single-Family Detached Residential District (Commerce City), quoted and re-checked
10. Sec. 21-4300. R-1 Single-Family Detached Residential District (Commerce City), quoted and re-checked
11. Commerce City Planning Division (c3gov.com)
12. Septic Systems | Adams County Health Department, quoted and re-checked
13. Septic Systems | Adams County Health Department, quoted and re-checked
14. Septic Systems | Adams County Health Department, quoted and re-checked
15. Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
16. Water Administration (Colorado statewide rule), quoted and re-checked
17. Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.