Guides
Chicago Home Inspection Checklist for Prewar Homes
Steam heat, galvanized and lead lines, and ice dam evidence in prewar homes: use this Chicago home inspection checklist to document what fails first.
What to take away
- A Chicago home inspection checklist for prewar housing starts with steam heat, galvanized supply lines and masonry that freeze-thaw cycles work on every winter.
- A steam boiler needs its pressure gauge, low-water cutoff and relief valve read before the first hard freeze, not after.
- A magnet separates galvanized steel from copper in one second, and the pipe between the meter and the street may be lead.
- Ice dam evidence lives in the atticsheathing stains, efflorescence and rusted fasteners, not in the icicles outside.
- Pre-1978 homes trigger the EPA lead rule, which puts risk assessment in a certified assessor's hands, not yours.
- Knob-and-tube wiring, clay tile sewer laterals and coal chutes are the prewar features a checklist built for newer housing skips, and each one has a check you can run on site.
Why prewar Chicago housing needs its own checklist
Much of Chicago went up before 1950, when steam heat, galvanized pipe and coal chutes were standard. A checklist built for slab foundations and heat pumps skips the failure modes that actually cost money here.
Freeze-thaw cycles work on masonry, roof flashing and exposed piping from November through March. A mild autumn hides a cracked radiator valve until the first cold snap, and by then the client is calling you, not a plumber.
This is not a renovation guide. It is a set of checks that produce defensible findings and a clean file. The same discipline shows up in daily SOPs for inspection firms.
Who regulates the work
Home inspectors in Illinois are licensed by the state, not the city. The Illinois Department of Financial and Professional Regulation (IDFPR) issues and renews home inspector licenses under the Home Inspector License Act, and the license number is the first thing a client can check.
Boiler replacement, masonry repair and roofing work inside Chicago need permits from the City of Chicago Department of Buildings, and the contractors who pull them are registered there. Those permits are pulled under the Chicago Building Code, so a finding that names both the code and the permit requirement lands harder than one that only describes the defect.
Steam heat: boiler, radiators and distribution
Steam is still common in two-flats, greystones and courtyard buildings. It runs at low pressure, usually under 5 psi, and behaves nothing like forced air. Inspectors who rush this section miss the most expensive defects in the house.
Start at the boiler
Read the pressure gauge, the low-water cutoff and the sight glass. A dirty sight glass hides a low-water condition, and a dry boiler block can crack.
Check the relief valve for corrosion or paint. A painted-over relief valve is a defect, not a cosmetic issue. Note the boiler's age if the data plate is legible.
Walk every radiator
Feel for cold sections at the bottom, which point to sludge or a failed trap. Look for rust streaks at the valve and union.
Open an air vent only if the system is running and you can do it safely. A vent that hisses and never closes wastes steam and raises fuel bills. A vent painted shut will not pass air at all.
- Boiler pressure gauge holds steady below 5 psi
- Low-water cutoff and sight glass are clean and functional
- Relief valve is unpainted and free of corrosion
- Every radiator heats evenly across its surface
- Air vents close when steam reaches them
- Pipe insulation is intact in unheated spaces
Follow the mains
In the basement, look for sagging pipes that trap water and cause banging. Check insulation in crawl spaces and near rim joists, where winter cold reaches first.
Galvanized plumbing and lead service line evidence
Galvanized steel supply lines were standard in Chicago until the 1950s. They corrode from the inside, and the corrosion narrows the bore until pressure drops. By the time a homeowner notices, the pipes are usually at the end of their life.
Start at the water meter. The pipe between the meter and the street is the service line, and in older neighborhoods that line may be lead. Document what you can see. Do not guess at what is buried.
A magnet sticks to galvanized steel and not to copper, which settles the material question on a visual inspection. A scratch test can confirm lead, but only on exposed pipe.
- Visible pipe material at the meter and main shutoff
- Galvanized lines with rust, scale or reduced flow
- Green or white corrosion at threaded joints
- Water pressure at the highest fixture
- Discolored water after a short flush
- Evidence of past repiping, such as mixed materials
Record pressure readings and photos. A client who sees 40 psi at the top floor understands the problem faster than a paragraph of description. Pair that evidence with your service quality standards so reports stay consistent across inspectors.
Knob-and-tube wiring and prewar electrical
Knob-and-tube wiring is the original electrical system in most prewar Chicago houses, and it is still live in plenty of attics, basements and wall cavities. It was not defective when it was installed, but it was never built to carry the load a modern household draws, and the insulation on conductors that old turns brittle.
What to check
- Ceramic knobs and tubes are intact, with no cracked or missing pieces
- Conductors are not spliced into newer cable outside a junction box
- Exposed conductor insulation in the attic is not brittle, frayed or chewed
- No knob-and-tube conductors are buried under attic insulation
- Panel has no double-tapped breakers, missing blanks or scorching
- Outlets are tested, and no three-prong outlet turns out to be ungrounded
Document what you see and recommend evaluation by a licensed electrician. Do not tell the client the wiring has to be replaced; that call belongs to the electrician, not to you.
Masonry, tuckpointing and freeze-thaw checks
Brick, limestone and terra cotta take the freeze-thaw cycle every Chicago winter. Water soaks into a mortar joint or a porous brick, freezes, expands and pushes the face of the brick off. That is why the takeaway starts with masonry, and it is the section of the checklist most often skipped.
What to check
- Spalling brickfaces that are flaking, peeling or already gone
- Mortar joints that are recessed, crumbling or cracked
- Efflorescence and dark staining that mark water moving through the wall
- Step cracks that follow the mortar at corners and above openings
- Steel lintels and sills with rust, sag or gaps at the window head
- Parapet walls, copings and chimney crowns, where water gets in first
- Recent tuckpointing done with mortar harder than the brick around it
- Caulk or sealant used in place of repointing
Tuckpointing done wrong is a defect you can see: the new mortar is harder than the old brick, and the brick starts to spall around the repair.
Clay tile sewer laterals, coal chutes and other prewar features
The lateral is the pipe that runs from the house to the city sewer. Prewar Chicago neighborhoods were built with clay tile laterals, and clay tile cracks, settles and takes in roots. You cannot judge a buried lateral from inside the basement, so say that plainly in the report and recommend a camera scope by a specialist.
- Floor drain, pit or laundry tub shows staining or standing water
- Cleanout is accessible and the cap is in place
- Yard grade dips along the path of the lateral
- Basement floor and lower wall show no signs of a past backup
- Sewer scope recommended where the lateral appears original
Coal chutes
A house built for coal heat has a chute through the foundation wall and a bin or room that once held the coal. Check that the chute door seals: an open chute is a direct hole into the basement and a common path for water, rodents and cold air. Bins abandoned when the house converted to gas usually sit behind stored items, so look behind them.
Windows and plaster
- Original double-hung windows with cracked glass, failed glazing putty or sashes that no longer seat
- Rot at the bottom rail and sill of wood windows
- Plaster that sounds hollow when tapped, which means it has separated from the lath
- Cracks that follow the lath lines or open at ceiling and wall corners
- Water-stained ceilings and walls that point to an old roof or plumbing leak
Chimneys and flues
- Brick chimney with a cracked crown or no cap
- Flue tiles with gaps, spalling or a shifted liner
- Abandoned flue openings left unsealed
- Chimney pulling away from the house at the roofline
- Stains running down the chimney breast inside the attic
Ice dam signs, attic ventilation and roof decking
Ice dams form when heat escapes into the attic, melts snow on the roof, and the meltwater refreezes at the eaves. Chicago winters produce them often, especially on older roofs with poor ventilation.
Outside
Look at the eaves from the ground and from a ladder if it is safe. Icicles alone prove nothing. Long icicles along the eave line plus a snow-free band higher up suggest a real ice dam.
Check gutters for ice buildup and for granules from worn shingles. Look at the fascia for vertical water stains.
In the attic
The attic tells the story. Dark stains on roof sheathing, especially near the eaves, mean water has been sitting there. Efflorescence, the white mineral deposit, means water moved through the wood and dried.
Rusted nails and fasteners are another sign, and so are delaminated plywood or curled shingle tabs seen from the attic side.
- Attic ventilation openings are clear and sized at 1 square foot of net free area per 150 square feet of attic floor
- Bath and kitchen exhausts vent outside, not into the attic
- Insulation covers the ceiling evenly, with no gaps at the eaves
- Roof sheathing shows no staining or delamination
- No rusted fasteners or efflorescence on decking
- Ice dam evidence noted with photos and location
Older Chicago attics often have gable vents only, which is rarely enough. Building code wants 1 square foot of net free vent area for every 150 square feet of attic floor, relaxed to 1 per 300 when intake and exhaust vents are balanced and a vapor retarder is present. Without soffit and ridge ventilation, warm air sits in the attic and feeds the cycle.
EPA lead rules for pre-1978 Chicago homes
Most prewar Chicago housing was painted before lead paint was banned for residential use in 1978, so the EPA lead rule is routine work here, not an edge case.
Lead paint in pre-1978 housing sits under 40 CFR Part 745, the EPA rule that carries both the seller and landlord disclosure requirement and the Renovation, Repair and Painting rule for contractors. Sellers and landlords must disclose known lead paint and lead hazards on the EPA/HUD disclosure form and give buyers and tenants the pamphlet Protect Your Family from Lead in Your Home.
The Lead | US EPA page is the starting point for the rule and for certified contractor requirements.
An inspector can note deteriorated paint and the age of the home. An inspector cannot perform a lead risk assessment without the certification, which belongs to a certified risk assessor or lead inspector. If you see chipping or chalking paint on a pre-1978 home, document it and refer the client to a certified professional. Do not disturb painted surfaces.
Radon and asbestos also turn up in older Chicago homes. The Illinois Emergency Management Agency runs the state's radon program and publishes the test guidance to hand a client, and asbestos abatement is licensed work administered by the Illinois Department of Public Health. The EPA's regulatory topic index is a useful starting point when you need the current rule for a specific material.
NIST and HUD references that back the checklist
Inspectors do not need to be engineers, but they should know where the technical baseline comes from.
NIST publishes research on how building materials age and fail. Its Materials and Structural Systems Division covers durability work that applies to masonry, roofing and piping in older housing, and the NIST publications catalog is where you find the individual papers.
HUD sets federal housing standards and runs the programs that touch inspection and property condition, and its housing pages are the entry point for those programs and the standards that flow from them.
Use these sources when a client challenges a finding. A citation to a federal publication carries more weight than an inspector's opinion, and the habit supports your service standards when a report is reviewed later.
A worked checklist by season
Chicago weather does not follow a calendar, but the sequence is reliable enough to plan around.
| Season | Primary focus | Key checks |
|---|---|---|
| Fall | Heating readiness | Boiler pressure, radiator valves, pipe insulation |
| Winter | Freeze and ice | Ice dam evidence, attic ventilation, exposed pipes |
| Spring | Water intrusion | Roof flashing, masonry, basement seepage |
| Summer | Plumbing and paint | Galvanized flow test, lead paint condition, service line |
- Confirm the year the home was built and note pre-1978 status.
- Inspect the boiler and every radiator before the heating season.
- Test water pressure and identify supply line materials at the meter.
- Check the attic for ice dam evidence and ventilation gaps.
- Document lead paint condition and refer to a certified assessor.
- Photograph every finding and link it to the report section.
Coverage matters more than order. A missed radiator valve in October becomes an emergency call in January, and a missed ice dam stain in March becomes a ceiling repair in April.
Train new staff on this sequence with the home inspection compliance checklist so the winter route is not left to memory. Firms running multiple inspectors should fold it into their operations and workflow so scheduling reflects the extra time old housing demands.
Common questions
How long does a winter inspection take on a prewar Chicago home?
There is no single number, because the time goes to systems rather than square footage: a prewar two-flat adds a boiler and radiator walk-through, a service line check at the meter, an attic deck review, the masonry elevations and the coal chute and sewer checks. Budget that time per system and quote the job with it built into the fee rather than absorbed.
Can I inspect a steam boiler while it runs?
You can observe it running. Do not open valves or drain the system. Note what you see and recommend a licensed technician for service.
Is a lead paint test part of a standard home inspection?
No. A standard inspection documents paint condition. Testing and risk assessment require separate certification under the EPA lead rule, and a certified risk assessor performs them.
What is the most common ice dam defect in Chicago?
Poor attic ventilation combined with gaps in ceiling insulation. That combination feeds the freeze-thaw cycle at the eaves, and it shows up as sheathing stains before it shows up as a ceiling leak.
