Generator Permit Requirements in Aurora, CO
Uses 2021 I-Codes with local amendments (Aurora Municipal Code Ch. 22). High altitude (5,471 ft), HVAC derating required. Spans Arapahoe, Adams, and Douglas counties. Aurora4Biz portal for permits. Flat-rate permits available for simple jobs. Email: permitcounter@auroragov.org
By Joey, Founder · Last verified March 29, 2026 · How we research →
When you don’t need a permit
Portable generators used with extension cords or with a properly installed transfer switch do NOT require a permit. This is the simplest emergency backup option. No permanent wiring means no electrical permit is needed. Never operate a portable generator indoors or in an attached garage.
When you do need a permit
A permanently installed standby generator with an automatic transfer switch requires both an electrical permit and a building permit under City of Aurora Building Code / 2021 IRC with Colorado Amendments. The generator must meet setback requirements from windows, doors, and property lines (typically 5 feet). A licensed electrician must install the transfer switch.
A standby generator with a new natural gas or propane supply line requires electrical, building, and plumbing permits under City of Aurora Building Code / 2021 IRC with Colorado Amendments. The gas supply must be installed by a licensed plumber, the electrical transfer switch by a licensed electrician. All three trades require separate permits and inspections.
Generator Permit Costs: Aurora vs. Nearby
Aurora runs higher than average for Colorado. Expect $225 – $600 versus the state average of $160 – $844.
| City | Estimated Fee |
|---|---|
| Aurora | $225 – $600 |
| Denver | $75 – $1,500 |
| Colorado Springs | $75 – $1,500 |
| Fort Collins | $75 – $1,500 |
Fees shown are estimates based on local building code data. Actual fees may vary based on project scope and valuation. See all Aurora permit costs →
Zoning & HOA Considerations
Standby generators are subject to setback requirements, typically 5 feet from any building opening (NFPA 37) and 3+ feet from property lines. Some jurisdictions require site plan review showing generator placement. Noise ordinances (typically 55-65 dBA daytime, 45-55 dBA nighttime) may affect placement.
If you live in an HOA community: hOAs often restrict generator placement, enclosures, and visibility. Some prohibit generators outright or require sound enclosures. Generators near pools, patios, or bedroom windows face the most scrutiny. Check CC&Rs before purchasing, a $6,000 generator that violates HOA rules is a major problem.
Estimated Project Timeline in Aurora
Here's a typical timeline for a generator project in Aurora, CO:
Timeline is based on Aurora's typical about 3 weeks permit processing time. Actual timelines vary by project complexity, completeness of application, and current department workload.
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Frequently Asked Questions
Estimated permit fees for Generator projects in Aurora, CO range from $225 – $600. Fees vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Generator projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.
Working without a required permit in Aurora can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.
Typical approval time for Generator permits in Aurora is about 2 weeks. More complex projects may take longer if plan review is required.
If you live in an HOA community, you may need architectural review approval in addition to a building permit. HOA rules and city building codes are separate, you may need to satisfy both. Review your CC&Rs and submit to your HOA's architectural review committee before starting work.
Learn More About Generator Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Generator Guide →