Call 1-800-344-7483 (DIG-RITE) at least 3 days before excavation. Just one call and all utility companies will be notified (Charter, Ameren, AT&T, Missouri Natural Gas and City of Union for water and sewer)
http://www.mo1call.com/
Per Municipal Code Section 405.725, you must have a permit for off-premises temporary signs such as a garage sale. The cost is $3.00 for up to five locations. No sign shall be placed on utility or telephone poles, or within the right-of-way of any street, highway or alley. Complete an application for a sign permit and bring to the Building Department, West Entrance, City Hall. Call 636-583-1805 for more information.
I have a problem with my neighbor's fence ... tree ... shed ... etc.
If you believe your neighbor has possibly built a structure without a building permit or if you believe that neighbor is breaking a city code of ordinance, you should complete a complaint form.
If you have an issue wih a neighbor's dog, loud noises, etc., please contact the Union Police Department at 636-583-3700.