Building Permits

Permits are required for many remodeling projects, repairs, replacements, new structures, and additions. Before starting any home improvement project, please contact the Inspectional Services Division at 630-823-5860 or Email Inspectional Services for permit requirements. Please remember to complete a building permit before starting any work. If you start work without a building permit, you are subject to a permit penalty and Village personnel have no other alternative than to stop work on your project. You can print a copy of the appropriate Building Permit Requirements for your project, below under Guides & Publications. You can also apply for a permit online by clicking on the link below.


List of Common Construction Projects

Some of the common construction projects are listed below. Contact Inspectional Services at 630.823-5860 if you have any questions.

  • For accessory structures, remodeling, and room additions, please use the building permit form found under Guides & Publications.

Guides & Publications

  1. Accessible Parking
  2. Accessible Parking - Spanish
  3. Building Permit Application
  4. Building Permit Application (PDF)
  5. Contractor Registration Requirements
  6. Contractor Registration requirements-Spanish
  7. Decks
  8. Decks-Spanish
  9. Detached Garage
  10. Detached Garage- Spanish
  11. Driveways
  12. Driveways - Spanish
  13. Electric Service Upgrades
  14. Electric Service Upgrades- Spanish
  15. Electric Vehicle Charging Station
  16. Electric Vehicle Charging Station- Spanish
  17. Energy Conservation
  18. Energy Conservation-Spanish
  19. Fences
  20. Fences- Spanish
  21. Flag Pole Requirements
  22. Flag Pole Requirements- Spanish
  23. Furnace and A/C units
  24. Furnace and A-C units -Spanish
  25. Low Voltage Alarms
  26. Low-voltage Alarm-Spanish
  27. Mailbox Installation
  28. Mailbox Installation- Spanish
  29. New* Knox Residential HomeBox Available
  30. Parking Lots
  31. Parking Lots -Spanish
  1. Patios, Service Walks, Stoops
  2. Patios, Service Walks, Stoops - Spanish
  3. Permanent Signs
  4. Permanent Signs-Spanish
  5. Plumbing Affidavit
  6. Plumbing Affidavit- Spanish
  7. Residential Remodel and Additions
  8. Residential Remodel and Addition-Spanish
  9. Roofs
  10. Roofs- Spanish
  11. Sanitary Sewer Repairs
  12. Sanitary Sewer Repairs - Spanish
  13. Sanitary Sewer Repairs 2025
  14. Sheds
  15. Sheds -Spanish
  16. Solar Permitting Guidelines
  17. Solar Permitting Guidelines-Spanish
  18. Stop Work Order 2018
  19. Swimming Pools
  20. Swimming Pools -Spanish
  21. Temporary Signs
  22. Temporary Signs-Spanish
  23. Temporary Tent
  24. Temporary Tent- Spanish
  25. Water Heater
  26. Water Heater -Spanish
  27. Water Service
  28. Water Service-Spanish
  29. Windows
  30. Windows - Spanish

Tools and Calculators



When to Start Home Improvement Projects

Work on a home improvement project may commence only after a building permit has been issued. To show a permit has been obtained for the work, please display the permit placard in a window so it is visible from the street throughout the entire project.

Handouts for Projects Regulations

The Inspectional Services Division has many helpful handouts specifying general regulations for many of the projects listed above.  Handouts are available for decks, patios, driveways, swimming pools, detached garages, sheds, and others. Please contact Inspectional Services to see if a handout is available for your project.