Is a permit required?
Rockford requires a building permit for building or altering any structure larger than 120 square feet.
"Building permit(s) shall be obtained prior to: Construction, alteration, enlargement, repair, or moving of a structure larger than 120 square feet."
Source: rockfordil.gov
The only deck exemption Rockford lists is a one-story detached deck of 120 square feet or less that is not supported by another structure; a deck attached to the house is not exempt.
"One-story detached accessory structures used as decks, tool storage sheds, playhouses and similar uses, provided the floor area does not exceed 120 square feet (11.15 m2) and is not supported by another structure."
Source: rockfordil.gov
What to bring
Rockford says a licensed design professional's drawings may be required with the application, though wood-frame one- and two-family homes do not need them.
"Construction documents prepared by a licensed design professional may be required to be submitted with the permit application."
Source: rockfordil.gov
How to apply
Rockford building permit questions go to Construction & Development Services.
"Questions regarding the building permit? Contact Construction & Development Services at 779-348-7158"
Source: rockfordil.gov
Footings and frost depth
Rockford says frost footings must be 42 inches below grade.
"How deep must frost footings be? 42 inches below grade."
Source: rockfordil.gov
How close to the property line
Rockford sends setback and location questions to Planning & Zoning.
"Questions regarding zoning, proper location, or use of the property? Contact Planning & Zoning at 779-348-7163"
Source: rockfordil.gov
Inspections
Rockford inspects footings before concrete is poured.
"Footing or Foundation - following excavations and after forms and any reinforcing steel are in place and prior to pouring of concrete."
Source: rockfordil.gov
Rockford inspects framing before it is covered.
"Structural / Building Framing - following completion of framing and all other trade rough-in inspections and prior to insulating or covering wall, ceiling, or roof framing"
Source: rockfordil.gov
Rockford inspections must be requested one full business day ahead.
"Inspections must be requested 1 full business day or 24 hours in advance."
Source: rockfordil.gov
Other rules
Rockford's permit page says work started without a permit can draw a fine much larger than the permit cost.
"Work started without a permit is also subject to a fine that is substantially larger than the cost of a permit."
Source: rockfordil.gov
Before anyone digs
Illinois law requires a call to JULIE, the state's one-call system, before digging deck footings. Call 811 or (800) 892-0123, or file online, at least 3 days before work starts. The call is free, and the locate is good for 25 days. On a hired job, the company doing the digging makes the call. More on Illinois deck rules
We are not the City of Rockford. Rules change, and some neighborhoods and HOAs have their own. Confirm with the city before you build. Spotted something out of date? Tell us.
Deck builders that serve Rockford
- Composite decks
- Pergolas and covers
- Screened and three-season porches
