Do I need a permit for a small deck in St. Paul?

If the deck is less than 30 inches above grade and less than 200 square feet, and it's freestanding (not attached to the house), you typically don't need a permit. If it's attached to the house, over 30 inches high, or larger than 200 square feet, you need a permit. St. Paul also requires a permit for any deck with a roof or stairs, regardless of size. Call the Building Department to confirm the details of your project.

How deep do deck footings have to go in St. Paul?

St. Paul's frost depth is 48 inches in the south and 60 inches in the north. Deck footings must extend below the frost depth — so plan for 60 inches if you're unsure which zone you're in. The building inspector will specify the exact depth on the permit. Many contractors overshoot to 54-60 inches to be safe.

Can I pull an electrical permit and do the work myself in St. Paul?

No. Minnesota requires a licensed journeyman electrician for any new branch circuits, subpanels, or permanent wiring. Owner-builders can self-perform most trades on their own occupied home, but electrical is the hard exception. You'll need to hire a licensed electrician to file the electrical subpermit and sign off on the work. The electrician doesn't have to do the entire job — you can rough it and they can inspect and sign off — but the permit and license are non-negotiable.

How much does a permit cost in St. Paul?

St. Paul uses a valuation-based fee system. Simple permits (fence, shed) might run $50-$150. Decks typically run $150-$400 depending on size. Additions and complex work scale with project valuation — usually 1.5-2% of the estimated construction cost. Get a rough estimate from a contractor, call the Building Department, and they'll quote the fee. Most fees are payable when you file.

Can I file my permit online in St. Paul?

The City of St. Paul has an online permit portal for many residential projects. Fence permits, shed permits, and some deck permits can often be filed and paid online. More complex projects (additions, structural work, energy-code upgrades) usually require in-person submission with sealed plans. Check the city website or call ahead to see if your project qualifies for online filing.

How long does plan review take in St. Paul?

Most residential permits (fence, shed, simple deck) are approved over-the-counter in 1-2 business days if the paperwork is complete. More detailed projects (additions, energy-code work, structural changes) typically run 2-4 weeks. If the plan has deficiencies, the clock resets when you resubmit. Budget 4-6 weeks for complex work to be safe.

Do I need a permit to replace my roof in St. Paul?

Most roof replacements require a permit in St. Paul, even if the material and slope stay the same. The permit is usually quick and inexpensive — expect $75-$200. Repairs (patching, flashing work, shingle replacement on a small section) typically don't require a permit. If you're adding skylights, dormers, or changing the structure, plan review will take longer.

What's the difference between 6A and 7 frost zones in St. Paul?

St. Paul's southern neighborhoods are in zone 6A (48-inch frost depth); northern areas are in zone 7 (60-inch frost depth). This matters for any project with footings or posts. If you're on Highway 94 or south, 48 inches is the baseline. If you're north of Highway 94, assume 60 inches. The Building Department will tell you which zone applies to your address when you file. When in doubt, go deeper.

Building Permits in St Paul, MN (2026)

Do I need a permit in St. Paul, Minnesota?

St. Paul's building permit system is shaped by three things: Minnesota's adoption of the 2022 International Building Code with state amendments, a 48-60 inch frost depth that hits hard in late October through April, and a building department that's generally straightforward if you know the rules upfront. The City of St. Paul Building Department handles all permits from your address, and they process most residential projects on a reasonable timeline — plan review typically runs 2-3 weeks for standard work, faster for minor items. Because St. Paul sits in the Minneapolis-St. Paul metro area, it also enforces state energy codes (Minnesota Energy Code) more aggressively than some rural jurisdictions, so energy-related upgrades (windows, insulation, HVAC) often trigger plan review even when they wouldn't in other cities. The good news: you can file in person during business hours, and the department staff are responsive to pre-application questions. The not-so-good news: St. Paul requires that deck footings, fence posts, and foundation work bottom out below the 48-60 inch frost depth — deeper than the national IRC baseline in some cases. Get that wrong and your permit gets bounced mid-winter, when contractors are booked solid for spring.

What's specific to St. Paul permits

St. Paul's frost depth varies: the southern portion of the city sits in zone 6A (48 inches minimum frost depth), while the northern neighborhoods push into zone 7 (60 inches). If your project is anywhere north of Highway 94, assume 60 inches and verify with the city. This matters hugely for decks, sheds, fences, and any foundation work. The building department will reference the frost depth on the permit application itself, so don't guess — call ahead if you're anywhere near the 48/60 boundary.

Minnesota adopted the 2022 IBC with state amendments, and St. Paul enforces it strictly. One common rejection: homeowners filing for deck permits without a site plan showing the location relative to property lines and any easements. The city requires a simple sketch — doesn't have to be professional, but it has to show where the deck sits on your lot and clearance from property lines. Second common rejection: electrical work (subpanels, new circuits, GFCI outlets) filed without a licensed electrician. Minnesota requires a licensed journeyman electrician for any new branch circuits or panel work. Owner-builders can pull permits for their own-occupied homes, but not for the electrical work — that's a trade license requirement, period.

St. Paul's building department has moved toward online filing in recent years. Check the city's permit portal (typically accessed through the St. Paul city website or a link labeled 'Development Services' or 'Building Permits') to see if your project type allows online filing. Many routine items — fence permits, shed permits, deck permits under certain square footage — can be filed and paid online, and you'll get a status update via email. More complex projects (additions, structural work, foundation changes) often still require in-person submission with sealed plans.

Energy code compliance is stricter here than in many Minnesota towns. If you're replacing more than 40% of the windows, the whole building has to meet the 2022 Minnesota Energy Code. If you're adding insulation or replacing HVAC, similar triggers apply. This isn't usually a hard rejection, but it does mean plan review takes longer — the city routes energy work to a separate reviewer. Budget 3-4 weeks instead of 2 for energy-heavy projects.

Seasonal variation matters. The frost-heave season in St. Paul runs October through April, and most footing and foundation inspections happen May through September when the ground is stable. If you need a footing inspection in January, you'll be scheduled — but the inspector will note conditions and may require a re-inspection after frost season. Plan outdoor foundation work (decks, sheds, additions) for late spring or early fall to avoid inspection delays.

Most common St. Paul permit projects

These are the projects St. Paul homeowners ask about most. Each has a dedicated page with local fee info, typical timelines, and the most common reasons St. Paul rejects them. Most require a permit; a few don't. Click through to find out.

Decks

Attached decks over 30 inches high and any deck over 200 square feet require a permit in St. Paul. Frost depth (48-60 inches) is the biggest constraint — footings must go deep. Detached patios and ground-level decks are usually exempt.

Fences

Fences over 6 feet, all masonry walls over 4 feet, and any fence in a corner-lot sight triangle require a permit. St. Paul's corner-lot rules are strict — most residential sight triangles extend 30+ feet. Many routine fence permits can be filed online.

Roof replacement

Most roof replacements require a permit in St. Paul, even if the material and slope stay the same. Roof repairs and underlayment upgrades may not. If you're adding dormer windows or changing the roof structure, expect a longer review.

Electrical work

Any new circuits, subpanels, or permanent fixtures require a permit and a licensed electrician. Generator hookups, EV charging, and new service upgrades always need electrical permits. Owner-builders cannot pull electrical permits for their own work — Minnesota requires a trade license.

Room additions

Any new habitable space requires a permit, plan review, electrical subpermit, and likely energy-code review. Expect 4-6 weeks minimum for plan review. Additions touching the foundation almost always require a footing inspection.

Windows

Replacing more than 10% of the window area triggers an energy-code review in St. Paul. Replacing 40% or more requires the whole building to meet the 2022 Minnesota Energy Code. Door replacements (entry, patio, basement sliders) often need permits if they're structural or in specific locations.

Do I need a building permit in St Paul, MN?