Frequently Asked Questions

Q: When do I need a permit?

A: A building permit is required for all new construction including buildings, fences, sheds, decks, and anything else that involves an above-ground structure. No permit is required for a concrete or paver patio or landscaping where no structural work is involved. However, a permit is required to construct parking lots and loading facilities.

A building permit is required for existing structures where the work to be done is regulated by a code. For example, any changes or replacement of water or gas piping, wiring, heating and central air conditioning systems, or water heaters require a permit. Work that affects the structure of any walls, door and window openings, roof elements, etc., as well as replacement of permanent exterior coverings such as roofing, siding, and window frames requires a permit.

A permit is not required for work that is not controlled by the building codes, such as painting and floor coverings, or installing appliances that are not permanently attached to the wiring or plumbing systems such as washing machines or room air conditioners.

If you have any questions about whether a permit is required, please call us. Obtaining a permit will ensure that the work is inspected so that you have the comfort of knowing it complies with applicable codes. If you decide to sell your home or building, the buyer will have that comfort as well.


Q: What kind of drawings or plans do I need?

A: Different kinds of construction require different kinds of plans. Please check the permit information packet for your type of project to determine what kind of drawings you need and who needs to prepare them.

Drawings must show all the details of the proposed construction – the size of lumber to be used, size of insulation, electric locations, etc. Drawings should not exceed 24 x 36 inches.

If your project is for nonresidential construction, or if it involves any form of structural change (residential or nonresidential), the plans must be sealed by an Illinois registered architect.


Q: How long will it take until my permit is approved?

A: Each permit is unique, and so the length of time needed for proper review may vary. Generally, residential construction permits take about 7 to 10 working days if the required information has been submitted and there are no unusual circumstances. Non-residential permits generally require a more extensive review, and take about 15 to 20 working days after the required information has been submitted. As with residential permits, unusual circumstances can lengthen this time.



Q: Can I start any of the construction work before my permit is approved?

A: We advise applicants to wait until the permit has been issued before starting any construction. If the project involves demolition of existing interior improvements, we can authorize that part of the project to proceed. Please contact the Building and Zoning Office to request authorization to proceed under these circumstances.


Q: Do I have to pay the permit fees when I apply?

A: You are required to pay a review fee when you apply for a permit. Certain permits also require additional fees to be paid when the permit is approved and issued; these additional fees must be paid when you pick up your permit.


Q: How do I determine the zoning of my property?

A: The St. Charles Zoning Map shows the zoning of all property in the City. Many newer parts of the City have "Planned Unit Development" zoning, which means that there is a set of zoning regulations written specifically for that area. The Zoning Ordinance is available under the "Code Book" section of this web site as Title 17. Zoning maps may be purchased from the Utility Billing Counter at the Municipal Center, 2 E. Main Street.

If you want to determine your property’s zoning in person or over the telephone, you may contact the Building and Zoning Division. You will need to provide us with the correct address of the property so we can give you an accurate answer. If you do not know the address, but have a parcel number, contact the Planning Division for assistance.