[header] How to report illegal construction [title] Look up the phone number for your local building inspection department online. [step] Most building inspection departments will have contact numbers that you can use to notify them of an illegal construction site. The number may be toll-free or carry local charges. 
[substeps] For example, in new york city, you can dial " 311 " to connect to the building inspection department in your area. Smaller cities or areas may have a local number you can connect to.