Do You Need a Permit to Build a Deck in Denver? (2025 Guide)

Adding a deck to your Denver home is an excellent way to expand your outdoor living space, but before you start building, it’s crucial to understand Denver’s deck permit requirements. Skipping this step could lead to fines, forced modifications, or even having to tear down your new deck.

At Mile High Patio, we’ve helped countless Denver homeowners navigate the permitting process smoothly.

Here’s everything you need to know about deck permits in Denver for 2025.

When Do You Need a Permit for a Deck in Denver?

✅ Permit REQUIRED If:

✔ Attached to Your Home – Any deck connected to the house needs a permit, regardless of size.
✔ Height Over 30 Inches – Decks higher than 30" above ground must meet safety codes.
✔ Covered or Multi-Level – Roofed decks or multi-tiered designs always require approval.
✔ Electrical/Plumbing Work – Adding lighting, outlets, or gas lines (for fire pits/grills) needs separate permits.

❌ Permit NOT Required If:

✔ Freestanding & Low-Profile – Detached decks under 200 sq. ft. AND less than 30" high may be exempt.
✔ Repairs (Like-for-Like) – Replacing deck boards or railings without structural changes.

Denver Deck Permit Process (2025 Updates)

Submit Plans – Include dimensions, materials, footing depth, and railing details.
Pay Fees – Typically 100–100–500, depending on deck size and complexity.
Inspections – Required for:
- Footings (before concrete is poured)
- Framing (before decking is installed)
- Final Approval (after completion)

Pro Tip: Denver’s ePermit system lets you apply online for faster processing!

Why Permits Matter

Safety – Ensures your deck won’t collapse (critical in Colorado’s freeze-thaw cycles).
Avoid Fines – Unpermitted decks can lead to $500+ daily penalties.
Resale Value – Buyers and appraisers require proof of permitted work.

Common Denver Deck Code Requirements

Footings – Must extend below frost line (42" minimum in Denver).
Railings – Required for decks 30+ inches high (minimum 36" tall).
Stairs – Need handrails if 4+ steps and proper tread depth (10").
Ledger Board – Attached decks require lag bolts or through-bolts (no nails!).