Both Waterloo and Cedar Falls expect a building permit for most full roof replacements, and many other towns in Black Hawk County do too. In most cases your roofing contractor pulls it for you, but it pays to know how it works.
A full tear-off and reroof almost always needs one. Replacing roof decking, changing the roof structure, or adding a new roof over an addition also does. Small repairs, like swapping a handful of shingles or resealing a vent, often do not. Rules change, so confirm with the city before work starts. In Waterloo, start with the City of Waterloo; in Cedar Falls, the City of Cedar Falls. Outside city limits, check with Black Hawk County.
A licensed, registered contractor normally applies for the permit, pays the fee, and schedules any inspection. Iowa requires contractors to register with the state, so ask for that registration and proof of insurance. If a contractor asks you to pull the permit in your own name, that is a red flag: it can make you responsible if something fails inspection.
Expectations vary, but common items are the number of shingle layers (most codes cap it at two, and many crews tear off to the deck anyway), ice barrier at the eaves in our cold climate, proper drip edge, flashing at walls and chimneys, and attic ventilation. Keep the permit card visible until the job is closed out.
If your house is in a historic district, such as Church Row in Waterloo, or has a local landmark designation, there may be extra review for visible material or color changes. Ask before you pick shingles.
Keep a copy of the closed permit, the shingle warranty registration, and the final invoice. They help with insurance, and buyers ask for them when you sell.
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