Do I need a permit for a small deck or patio?

If it's a patio (ground-level concrete or pavers on grade), no permit is required. If it's a deck — a raised structure with stairs and railings — yes, you need a permit if it's over 200 square feet or more than 30 inches above ground. Aurora enforces this consistently. Get a permit. The inspection fee is small compared to the cost of tearing out and rebuilding a non-compliant deck.

How deep do I need to dig deck footings in Aurora?

Aurora's adopted code requires footings to go to actual frost depth: 42 inches in northern Aurora and 36 inches in southern areas. The IRC allows 36 inches in some climate zones, but Aurora goes deeper because of local soil conditions and frost-heave history. Measure from the finished ground surface to the bottom of the concrete — don't guess. The inspector will ask.

Can I pull a permit as an owner-builder if I don't have a contractor's license?

Yes, if the property is owner-occupied and your primary residence. You can pull building, electrical, plumbing, and HVAC permits in your own name. However, electrical and plumbing work still needs to pass inspection by a qualified inspector or the city inspector, even if you did the work yourself. It's wise to have a licensed electrician or plumber inspect your own work before the city inspection — it usually costs $100–$200 and prevents a failed inspection and costly rework.

What's the most common reason permits get rejected in Aurora?

Incomplete or missing site plans. The Building Department needs a plan showing your lot lines, property-line setbacks, the location of existing structures, and the location of the new work (deck, fence, addition, etc.). Without it, they'll bounce your application. A $20 survey or a sketched site plan with dimensions and property-line markups is enough to avoid this.

How much do Aurora permits cost?

Most residential building permits are 1.5–2% of the declared project valuation. A $10,000 deck costs $150–$200 in fees; a $50,000 addition costs $750–$1,000. Some projects (fence permits, simple roof replacements) have flat fees of $75–$150. Subpermits (electrical, plumbing, HVAC) are typically $100–$250 each. Always confirm the exact fee with the Building Department before filing — fee structures can change.

How long does plan review take in Aurora?

Over-the-counter permits (simple fences, shed permits, roof-only replacements) process same-day or next-day if paperwork is complete. Plan-check permits for decks, additions, and new structures take 2–4 weeks. If there are deficiencies, plan on another 1–2 weeks after resubmission. Starting in spring or summer usually means faster review; winter and fall can add a week or two.

Do I need a permit to replace my water heater or HVAC system?

A water-heater replacement is typically over-the-counter and exempt if you're replacing like-for-like (same capacity, same fuel type, same location). HVAC system replacement depends on whether you're adding ductwork or changing the system location. Ask the Building Department before you buy the unit — if it needs a permit, you'll want the equipment specs on hand when you file.

What about work in historic districts or near the Fox River?

If your property is in a historic district or riverfront overlay zone, you may need a Certificate of Appropriateness or environmental review before the Building Department will issue a structural permit. These are coordinated by the city's planning staff and add 2–4 weeks to the timeline. Call the Building Department to confirm whether your address is affected — most standard residential properties are not, but it's worth a quick check.

Do I need a permit for a fence?

Fences up to 6 feet in rear yards and 4 feet in front yards are typically exempt if they're entirely on your property line. Pool barriers always require a permit, even if they're 4 feet or shorter. Any fence over the height limit, or on a corner lot (sight-triangle rules apply), needs a permit. A simple fence permit in Aurora is usually $75–$125 and processes over-the-counter.

Building Permits in Aurora, IL (2026)

Do I need a permit in Aurora, Illinois?

Aurora's permit system is administrated by the City of Aurora Building Department, which applies the current Illinois Building Code (based on the 2021 International Building Code) across the city's 46 square miles. The city spans two climate zones — 5A in the north and 4A in the south — which affects foundation depth requirements. Aurora's frost line reaches 42 inches in the northern part of the city and 36 inches in the southern areas; deck footings, shed foundations, and fence posts all need to bottom out below frost. The soil is primarily glacial till and loess, with coal-bearing clays in some southern areas — this matters for excavation work and basement additions, where environmental review may be required.

Almost all structural work in Aurora requires a permit: decks over 200 square feet, additions, roof replacements, electrical rewiring, HVAC systems, and fence installations. The chief exemption is owner-occupied residential work — if you own the home and it's your primary residence, you can pull permits in your own name (rather than requiring a licensed contractor). That said, some trades — electrical, plumbing, HVAC — still need to be either licensed or permitted separately depending on the scope.

The Building Department processes most permits over-the-counter or online. Plan review typically takes 2–3 weeks for standard residential projects. Fees run 1.5–2% of the valuation you declare on the application. The key to avoiding delays is a clear site plan showing property lines, setbacks, and existing structures, plus detailed drawings if the work involves new framing or major HVAC/electrical changes.

Many Aurora homeowners get tripped up the same way: they assume a small project (a patio extension, a finished basement, replacing a water heater) doesn't need a permit. It almost certainly does. A 90-second call to the Building Department before you start is the cheapest insurance against rework, fines, or a title issue down the road.

What's specific to Aurora permits

Aurora adopted the 2021 International Building Code with Illinois amendments, which means code citations in your permit will reference IBC sections and Illinois-specific modifications. The city enforces the code fairly consistently, but the Building Department has seen a lot of owner-builder mistakes in the last five years — incomplete site plans, undersized deck footings, and missing electrical subpermits are the top three rejections. Bring a printed site plan showing your lot lines, setback dimensions, and the location of any existing structures. That alone cuts plan-review time in half.

The 42-inch frost depth in northern Aurora (and 36 inches in the south) is real and enforced. The IRC minimum is 36 inches; Aurora's adopted code requires you to go to actual frost depth. For decks, sheds, and fence posts, that's usually 42 inches in Aurora proper. Some inspectors are strict about visual verification — they'll look at the footing pit to confirm the concrete is deep enough. If you're pouring in October through April, frost heave is a real risk; most inspectors prefer to see footings dug in late spring or summer.

Aurora's Building Department has an online permit portal where you can file applications and track status. You can also file in person at City Hall, or by mail. Over-the-counter permits (simple fence permits, shed permits under 120 square feet, electrical service upgrades) can be processed same-day or next-day if the paperwork is complete. Plan-check permits for decks, additions, and new construction take 2–4 weeks; resubmittals add another 1–2 weeks if there are deficiencies.

Electrical, plumbing, and HVAC work all require separate subpermits. If you're the owner of an owner-occupied home and you're doing your own electrical work, you can pull the electrical permit yourself — but the work must pass inspection by a state-licensed electrician or the city's electrical inspector. Hiring a licensed electrician usually includes the permit in their bid; if you DIY, budget an extra $50–$150 for the electrical subpermit and inspection fee. The same applies to plumbing: owner-occupied homeowners can pull a plumbing permit, but the work must be inspected and sign-off typically requires a licensed plumber or the city inspector.

Aurora's zoning overlay (especially in downtown and near the Fox River) sometimes requires historic or environmental review for exterior work, additions, or demolition. If your property is in a historic district or a riverfront zone, ask the Building Department upfront whether you need a Certificate of Appropriateness or environmental clearance before you apply for the structural permit. These reviews add 2–4 weeks and sometimes require architectural plans. Most homeowners in standard residential zones don't encounter this, but it's worth a 30-second confirmation call.

Most common Aurora permit projects

These projects come up over and over in Aurora. Each has its own permit path, fee structure, and inspection timeline. Click through to see what the Building Department will ask for, what gets commonly rejected, and what you'll pay.

Decks

Any deck over 200 square feet or more than 30 inches above ground in Aurora requires a full permit and three inspections (footing, framing, final). Frost-depth footings (42 inches in northern Aurora) are the main hang-up. Plan on 3–4 weeks for plan review and $200–$600 in fees.

Fences

Aurora allows wood and chain-link fences up to 6 feet in rear yards and 4 feet in front yards without a permit, provided they're on your property line. Any fence over those heights, or any pool barrier, needs a permit. Pool fences are $125–$200 because they require a separate inspection.

Roof replacement

Full roof replacements require a permit in Aurora. If you're also re-framing the roof structure or adding skylights, you'll need a building permit in addition to the roofing permit. Re-roofing only (same framing, new shingles) is sometimes over-the-counter. Fees are typically $150–$350.

Electrical work

Panel upgrades, new circuits, EV chargers, and solar installations all require electrical permits. Owner-occupied homeowners can pull permits in their own name, but work must pass inspection. Subpermit fees are typically $100–$250. Plan on 1–2 weeks for review.

Room additions

A second story, new bedroom, or bump-out addition triggers a full building permit with electrical, plumbing, and HVAC subpermits. Plan review takes 3–4 weeks. Fees are typically 1.5–2% of the declared valuation. Setback and lot-coverage compliance are the main rejection reasons.

Basement finishing

Any finished basement with new walls, HVAC, plumbing, or electrical needs a building permit plus subpermits. Egress windows are required if the basement is a bedroom. Plan on 2–3 weeks for plan review and $300–$800 in total fees.

Do I need a building permit in Aurora, IL?