Deck / Patio Permit Requirements in Johnstown, CO
Johnstown is a city of 20,639 residents in Colorado that follows the 2018 building code. Whether you need a building permit for your Deck / Patio project depends on the scope of work — here's what Johnstown's building department requires.
When you DON'T need a permit
Freestanding decks not more than 30 inches above grade are exempt from a building permit per IRC R105.2.
Source: Town of Johnstown Code / 2018 IRC (SAFEbuilt)
When you DO need a permit
Attached decks require a building permit even if under 30 inches, as the ledger board attachment affects the dwelling structure.
Estimated fee: $80 – $280
Typical timeline: About 2 weeks
Source: Town of Johnstown Code / 2018 IRC (SAFEbuilt)
Decks more than 30 inches above grade require a building permit with plans showing footings, structural connections, and guardrails.
Estimated fee: $120 – $400
Typical timeline: About 2 weeks
Source: Town of Johnstown Code / 2018 IRC (SAFEbuilt)
Covered decks or those over 300 sq ft require a building permit and may trigger additional zoning review.
Estimated fee: $160 – $480
Typical timeline: About 2 weeks
Source: Town of Johnstown Code / 2018 IRC (SAFEbuilt)
Decks may be subject to zoning setback and lot coverage requirements. Check with your local planning department before building near property lines.
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Frequently Asked Questions
Estimated permit fees for Deck / Patio projects in Johnstown, CO range from $80 – $280. Fees vary based on project scope and valuation.
It depends on the specifics of your project. Some smaller Deck / Patio 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 Johnstown 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 Deck / Patio permits in Johnstown is About 2 weeks. More complex projects may take longer if plan review is required.
Learn More About Deck / Patio Permits
Read our complete guide covering permit requirements, costs, common exemptions, and the application process.
Read Deck / Patio Guide →