Multi-Family Addition

When the location of any part of the exterior walls and roof of a multi-family residence are changed, an addition permit is required. Examples would be single or multi- story addition, screen or open porch with roof, 3 season room, etc.

See below for permit submittal requirements and general information.


Application Requirements


  • Permit Application Packet (PDF) - The documents below have been combined into one PDF file.
    1. Permit Application
    2. Non-Residential Zoning Worksheet
    3. Building Site and Utility Data Worksheet
    4. Water Service and Meter Worksheet
    5. Fire Protection – Letter of Understanding (only if a separate Fire Protection permit is required)
    6. Contractor of Record (Contractor License Requirements / Contractor License Application)

Application Fees & Deposits


  • Permit Application Deposit - $750 (Due at time of permit application submission)
  • Building Construction and Inspection Fee - $200 minimum fee for up to 1,500 square feet ($25 per additional 1,000 square feet over 1,500) (Due at time of permit pick-up)
  • Additional fees may apply at time of permit pick-up

Drawing Requirements (To Be Submitted With Permit Application)


*The Village of Northbrook Standard Detail Sheet should be included within the civil engineering drawing set.

Separate Permit Requirements


The following may occur with the construction of an addition to a single family and require a separate permit:

Construction Submittal Requirements


The following may apply during the course of construction:

Required Inspections


See Guidelines For Scheduling Permit Inspection (PDF) for more information.

Additional Resources