What an annual inspection proves
An annual inspection in the City of Chicago is any inspection a program requires on a yearly cycle, and its record proves that the program examined a defined part of a building on a stated date and recorded a result. The defined part is the key qualification: no Chicago annual inspection looks at a building as a whole.
What distinguishes this class from everything else on this site is the trigger. A permit inspection happens because the permit holder asked for it, and when nobody asks, nothing happens and nothing is recorded. An annual inspection falls due because a year passed. These records exist because a clock ran out, which means a missing year is evidence of a requirement unmet rather than of a request unmade.
That is the strongest property this class has, and it is undercut by two things a reader has to hold onto: most Chicago buildings are inside none of these programs, and the only published audit of an annual Chicago program found two thirds of the required inspections had not been done.
Which Chicago programs actually run annually
The Department of Buildings lists its inspection programs together, and only some of them carry a yearly cadence. Those that do:
- Conservation — annual maintenance inspections of existing buildings, run by the Division of Building Inspections.
- Elevator and conveyance device inspections — annual, filed under the certification program by a licensed company the owner engages.
- Ventilation — annual equipment checks for high-rise and commercial buildings.
- Refrigeration — annual equipment inspections.
- Electrical — signs and generators, annually.
Several other programs the Department runs are periodic without a stated yearly interval, among them boiler inspections, exposed metal structure reporting on fire escapes and balconies, and construction equipment inspection. Others are not cyclical at all: the Strategic Task Force inspects at the Police Department's request, and the vacant and abandoned buildings program responds to a building's status rather than to a date. Treating any of those as annual overstates what the published material supports. The Department's inspections and reports page is the listing these come from.
Notice what the annual list contains. Three of the five are equipment programs, and two of those apply to high-rise or commercial buildings. The yearly cadence in Chicago attaches mostly to machinery in larger buildings, not to dwellings.
Conservation, the one aimed at the building itself
The exception is Conservation, which the Department describes as annual maintenance inspections of existing buildings. It is the only annual program whose subject is the building rather than a machine inside it, and it is correspondingly the one readers most want to find.
The same division handles alteration permits for exterior walls, porches and illegal dwelling-unit deconversions — the conversion of a building back to fewer units than it legally contains, or the reverse carried out without authorization. That combination tells you what the program is watching: the envelope, the structures people stand on, and the number of units a building actually holds against the number it is permitted to hold.
What the published material does not establish is which buildings are in the program's annual cycle and on what basis they enter it. The Department describes the activity, not the selection. So a Conservation inspection record is good evidence that the building was examined on that date, and it is not evidence that the building sits in a yearly cycle that will continue — and an address with no Conservation record cannot be assumed to have been skipped, because it may never have been scheduled.
A yearly requirement is not a yearly record
Chicago has measured one of its annual programs in public, and the result is the most useful caution available about all of them.
The City's Office of Inspector General audited elevator inspections for calendar year 2013. Of 6,438 buildings requiring an annual inspection that year, 2,185 — 33.9 percent — received one. Completed annual inspections had fallen 7.6 percent since 2010. The audit was published in October 2014 and reports on 2013; it is not current, and no later audit of a Chicago annual program was located. See the elevator inspections audit.
Two thirds of a yearly requirement going unmet, in the one program anybody counted, is the fact that governs how a reader should treat an annual gap. A missing year is meaningful and it is not conclusive. It is consistent with a building that was skipped by a program with more buildings than inspectors, which the audit describes directly: at the time, the elevator appropriation supported 11 inspection staff, and the Department's own analysis said it needed six more to complete all annual inspections.
And a gap may not be a gap at all. Chicago publishes no standalone Department of Buildings inspections dataset, so a passed annual inspection generally produces no public record. Inspection activity reaches the open data mainly where it generated a violation. The visible annual record is therefore a record of failures, and a building with a clean public history may have been inspected every year, once, or never.
The annual cycle that enforcement creates
One Chicago annual inspection requirement is produced by enforcement rather than by equipment, and it is unusually specific.
Under the 2021 ordinance that replaced the City's former scofflaw framework with a list of priority buildings with serious and chronic code violations, the building official must inspect listed buildings at least once every twelve months, under Section 14A-6-607.1. That is an annual cadence imposed on named buildings by designation.
The removal rule is more interesting still. Inspections continue after a building comes off the list until two consecutive inspections at least six months apart find no serious violations, unless the building was listed in error. So a building can carry an inspection cadence that outlasts its listing, and an inspection history showing visits at roughly six-month intervals after a period of listing is the shape that rule produces. The ordinance is published by the City and took full force and effect on September 1, 2021.
For a reader, this is a case where the record's cadence identifies its cause. Most annual inspections recur because of what a building contains. These recur because of what the City has concluded about it.
Reading an annual sequence
Four questions make an annual record readable, and they are not the questions most readers start with.
Which program is this? An annual ventilation check in a commercial high-rise, an elevator certification filing and a Conservation maintenance inspection are three different examinations with nothing in common except their interval. The program name is the scope.
Who performed it? Elevator certification filings are made by a licensed company the owner engaged; the rest are Department inspections. A private filing is an attestation received by the City, and on the only published measurement, the arrangement where the owner must hire and file produced completed inspections far more often than the arrangement where a City inspector was due to attend.
Is the building in any annual program at all? For a single-family home, a two-flat or a three-flat with no elevator, no commercial ventilation plant and no refrigeration equipment, the answer is usually no. The absence of annual records for such a building is the expected state and supports no inference about its condition.
What would a complete sequence look like? This is where annual records earn their standing. Where an interval is stated, a reader can count. A sequence running consecutively and then stopping is showing something a permit history, where gaps are ordinary, can never show — provided the interval is stated, which for several Chicago programs described only as periodic it is not.