Building Permit Guides by City and Project

Chicago, ILConfirm with authority

What permit does an ADU need in Chicago?

Chicago evaluates a secondary dwelling as a change in dwelling configuration with building, zoning, life-safety, trade, and possible occupancy review.

16 guide citations · Reviewed Sep 12, 2026Compare

Chicago, ILConditional

When does a deck or porch need a permit in Chicago?

Chicago exempts an at-grade noncombustible patio and a qualifying porch under 50 square feet with a floor no more than six feet above grade, but structural porch or deck work always requires a permit.

4 guide citations · Reviewed Oct 24, 2026Compare

Chicago, ILPermit required

Does an electrical panel upgrade need a permit in Chicago?

An electrical panel or service upgrade is a regulated permit scope in Chicago and may require supporting plans or related building review.

2 guide citations + 3 supplement sources · Reviewed Sep 12, 2026Compare

Chicago, ILConfirm with authority

Does a residential fence need a permit in Chicago?

Chicago fence work depends on location, height, zoning, public-way conditions, and whether the work includes a wall or other structure.

2 guide citations + 3 supplement sources · Reviewed Sep 12, 2026Compare

Chicago, ILConfirm with authority

Does an HVAC replacement need a permit in Chicago?

Installed HVAC replacement is a project-specific building or trade scope in Chicago, with mechanical, electrical, fuel, and inspection requirements determined by the work.

2 guide citations + 5 supplement sources · Reviewed Sep 12, 2026Compare

Chicago, ILConditional

What permit does a residential interior remodel need in Chicago?

Chicago exempts limited finish work, cabinetry without utility connections and some in-kind interior components; qualifying nonstructural remodeling can use Express.

4 guide citations · Reviewed Oct 24, 2026Compare

Chicago, ILConfirm with authority

Does a roof replacement need a permit in Chicago?

Reroofing a non-low-sloped roof can be permit-exempt on qualifying residential buildings. Low-sloped reroofing, landmark work, and structural changes require separate permit review.

7 guide citations · Reviewed Sep 12, 2026Compare

Chicago, ILPermit required

What permits does a residential solar installation need in Chicago?

A roof-mounted solar installation can require building, electrical, structural, zoning, and inspection review in Chicago.

3 guide citations · Reviewed Sep 12, 2026Compare

Chicago, ILConfirm with authority

Does a water-heater replacement need a permit in Chicago?

A water-heater replacement can require plumbing, mechanical, electrical, fuel, and building review in Chicago.

2 guide citations + 3 supplement sources · Reviewed Sep 12, 2026Compare

Chicago, ILConditional

Does exterior window or door replacement need a permit in Chicago?

Chicago exempts qualifying in-kind non-fire-rated window or door replacement in small residential buildings, while other replacement can use Express and new openings require plan review.

4 guide citations · Reviewed Oct 24, 2026Compare