September 15 is the Chicago heat ordinance deadline, and it does not slide because your boiler guy is booked out. From that date to June 1 every rental unit owes tenants 68°F by day and 66°F overnight, and the city writes tickets at $500 to $1,000 a day, per violation. Why the heat came up short is not part of the conversation. Nobody downtown cares that the radiators were hot and the back porch door had a half-inch gap under it. These two weeks are when landlord draft proofing in Chicago stops being a nice-to-have. Below: what gets checked, what counts as a fail, what it runs.
What the Chicago Heat Ordinance Requires in the 2026-27 Season
Heat season in Chicago runs September 15 through June 1. The Chicago heat ordinance 2026-27 rules call for at least 68°F from 8:30 a.m. to 10:30 p.m. and 66°F from 10:30 p.m. to 8:30 a.m. in every habitable room, bathroom and toilet room. The Chicago Heat Ordinance sits in Title 14X, enforced by the Department of Buildings.
Those are the Chicago heat ordinance temperature requirements in full, and Chicago heat ordinance fines run $500 to $1,000 per day, per violation. Ovens, water heaters and space heaters do not count as heat, so the landlord heat requirements Chicago enforces come to two things: equipment in working order, and a building that holds what it makes.
The two-pipe exception and the 45°F night
One carve-out. Where a single system handles heating and cooling, the minimum is 64°F at all hours from September 15 until the first night below 45°F outdoors, or October 15, whichever lands first. Real work window: mid-August to mid-October. Normal first freeze at O’Hare is October 19 per NWS first freeze normals for Chicago.
Why a Working Boiler Still Fails the 68°F Test
A boiler in good order is not the standard. The reading is. It gets taken in the room, three feet off the floor, windows and doors shut, portable heaters off. Air infiltration along one entry door and two rope-and-pulley windows eats two to four degrees on a windy night, and lakefront wind does not negotiate. Inspection files show it constantly: system running, unit at 63.
Which is where drafty apartment landlord responsibility in Chicago gets settled. The city puts windows, doors and walls in heat-retaining condition on the owner, right beside the equipment. A wall that cold freezes the pipes inside it too, which is how February turns into frozen pipe repair. ENERGY STAR on sealing and insulating puts the upside near 15% of heating and cooling costs, though staying out of a hearing is the better payoff.
The Pre-Season Draft-Proofing Checklist
Run this before the 15th, not after the first cold snap. Landlord draft proofing Chicago style is the envelope half of any Chicago heat ordinance compliance checklist, and a landlord winterization checklist for Chicago stock. A greystone, a courtyard walk-up, a garden unit and a high-rise condo leak in different places. The list does not change.
| What you check | What counts as a fail |
|---|---|
| Entry door, flashlight, after dark | Any beam visible from outside |
| Gap under the slab | More than 1/4 inch |
| Weather stripping condition | Flattened, hardened, peeling, gapped corners |
| Door swing and reveal | Slab drags, reveal runs uneven |
| Frame-to-wall joint | Open gaps at plaster or masonry |
| Sash locks, weight-and-pulley windows | Meeting rail never pulls tight |
| Hallway and back porch doors | No sweep, closer leaves ajar |
| Rim joist and hatches | Bare, unsealed, uninsulated |
Book a pre-season heating inspection in Chicago with a licensed HVAC contractor in the same stretch. Different trade, same deadline. That is how you prepare a rental property for winter in Chicago without a 311 ticket teaching you the list.
Doors: Weather Stripping, Sweeps, and Doors That Have Settled
Doors carry most of the loss. How to fix a door that does not seal starts out boring: one continuous strip up both sides of the jamb and across the head, tight joints in the corners, a thickness that compresses when the door shuts and still lets it shut. That is DOE guidance on weatherstripping, and most of what Chicago apartment door weather stripping is. Weather stripping installation in Chicago is fitting work.
- Felt: cheap, dies fast.
- Open-cell foam: one season.
- Tubular vinyl: several years.
- V-strip and spring bronze: decades.
To stop cold air coming under door slabs you want a sweep, a door shoe or a bulb threshold, picked for what the floor does; carpet chews sweeps. Door sweep installation in Chicago is twenty minutes on a square opening, an afternoon on one that is not.
Then the settled ones. A door not closing properly in an old apartment means the frame moved with the house: long screws through the hinges into the stud, shims, sometimes a planed edge. Sagging door repair in Chicago lives under door and window repair in Chicago. Pre-1978 buildings: old paint around an opening falls under EPA lead-safe rules.
Sealing Gaps in Masonry, Plaster, and Window Frames
How to seal gaps around windows in an old building comes down to width. Hairline to a quarter inch takes elastomeric sealant or acrylic latex caulk with silicone. Wider takes backer rod first, sealant over it. Crumbled mortar joints need tuckpointing, a mason’s work, and saying so beats smearing caulk over it.
Caulking around windows in Chicago is half the job. Pull a casing in a two-flat and you find an open weight pocket holding 1910 air. Two-flat drafty windows in Chicago go quiet with low-expansion foam in the cavity, a sash lock that draws the meeting rail tight, plus a storm window insert. Whatever the plaster over lath looks like after is plaster and drywall repair.
What Draft-Proofing Costs in Chicago and How Long It Takes
Weather stripping cost in Chicago tracks the national spread with a city labor premium on top.
| Line item | Range | Source |
|---|---|---|
| Weatherstripping, whole project | $131–$436, $283 average | HomeAdvisor, 2025–26 |
| Material, per linear foot | $0.10–$4 | HomeAdvisor, 2025–26 |
| Labor share of the invoice | About 80% | HomeAdvisor, 2025–26 |
| HandyBandi hourly rate | From $80/hour | handybandi.com |
| Typical single visit | $180–$200 | handybandi.com |
| Minimum trip charge | $150–$250 | handybandi.com |
| Urgent call-out | Plus $250 | handybandi.com |
Door weather stripping replacement cost sits low when the frame is square and climbs when it is not, because the bill is fitting time. One apartment is a two to four hour visit. A six-unit building is a day. Full handyman pricing in Chicago is on the site. Set any of it against $500 to $1,000 a day.
If a Tenant Files a 311 Complaint
A no heat complaint to 311 in Chicago goes to the Department of Buildings, an inspector visits, the outcome gets logged. Sometimes weeks later. Sometimes nobody is home to open the door, which closed roughly 30% of complaints uninvestigated in a WBEZ review of 311 data. A confirmed violation moves to an administrative hearing or circuit court, which is what Chicago heat court for a landlord means in practice. Filing a 311 report is free.
The tenant clock runs separately. Under RLTO Section 5-12-110, after written notice a tenant may buy the missing service and deduct it, claim reduced rental value, or move to substitute housing at the owner’s cost. Unfixed past 24 hours, withhold. Past 72 hours, terminate. Read it, ask your own attorney.
Book the Work Before September 15
HandyBandi covers the envelope: weather stripping, sweeps and thresholds, settled doors, sealed gaps, plaster patched after. Boilers, furnaces and gas lines are not ours, and an honest Chicago heat ordinance handyman says so before the invoice. We are bonded and insured, which is what a condo association wants before the elevator key appears. Handyman for landlords in Chicago starts at Chicago handyman services, and the full list of home repair services in Chicago is one click over. Andersonville to Logan Square.
Frequently Asked Questions
September 15 through June 1. Units hold 68°F from 8:30 a.m. to 10:30 p.m. and 66°F overnight.
Yes. The standard is the temperature in the room, not the state of the equipment, and the city says the cause is irrelevant.
Yes. Windows, doors and walls in heat-retaining condition sit with the owner, so a drafty apartment is landlord responsibility in Chicago.
HomeAdvisor puts whole-project weatherstripping at $131 to $436, averaging $283. A single door runs less, a racked frame more.
A Department of Buildings inspector visits and logs an outcome. Confirmed violations go to an administrative hearing or circuit court.
Mid-August through the first week of September. After the first cold night every handyman calendar in Chicago fills up.