Property record
311 East Ontario Street, Chicago
Office in Chicago, Illinois. It covers 23,011 square feet on the ground.
This building
311 East Ontario Street, Chicago. Office in Chicago, Illinois. Property ID sp2mdpq6fmpn8zf.
Facts
| Fact | Value | Source |
|---|---|---|
| Address | 311 East Ontario Street, Chicago, IL 60611 | Overture Maps addresses |
| Building type | Office | Overture Maps building footprints and SkyPSI estimator |
| Footprint | 23,011 square feet | Overture Maps building footprints |
| Perimeter | 607.06 feet | Overture Maps building footprints |
| Height | 254.27 feet | Overture Maps building footprints and Google Open Buildings |
| Stories | 20 stories | Overture Maps building footprints and Google Open Buildings |
| Exterior wall area | 154,355 square feet | SkyPSI estimator |
| Parcel number | 17102070380000 | County and state public records |
| Land use | 529 Commercial/Industrial | County and state public records |
Cost ranges
Whole-building ranges from the SkyPSI estimator, calibrated October 2, 2026. Grade C: modelled from the Texas calibration. What the grades mean.
Exterior soft wash
| Service | Low | Most likely | High |
|---|---|---|---|
| Facade wash, conventional access | $24,000 | $43,000 | $72,000 |
Window cleaning
| Service | Low | Most likely | High |
|---|---|---|---|
| Exterior windows, rope access | $32,000 | $64,000 | $112,000 |
| Windows inside and out, rope access | $35,000 | $70,000 | $124,500 |
Best method
- Exterior soft wash: Boom lift and Rope access fit this building at the same cost, most likely $43,000.
- Window cleaning: Rope access fits this building, most likely $64,000.
Similar buildings nearby
How we know
Each fact names the source it comes from. A building file carries the source of each field, and SkyPSI shows that source beside the fact.
- County and state public records: Situs addresses, parcel numbers, land use, year built and floor counts from county appraisal districts and state open data.
- Google Open Buildings: Building outlines and heights from Google Open Buildings, reached through the Overture Maps buildings theme.
- Overture Maps addresses: Street addresses from the Overture Maps addresses theme.
- Overture Maps building footprints: Building outlines, heights and floor counts from the Overture Maps buildings theme.
- SkyPSI estimator: SkyPSI's own price model, calibrated rates and building-class rules.
Cost ranges come from the SkyPSI estimator, calibrated October 2, 2026. How a SkyEstimate is built.
Ask SkyPSI for a quote on your building.
Request a QuoteSources: County and state public records, Google Open Buildings, Overture Maps addresses, Overture Maps building footprints, SkyPSI estimator.
An estimate, not a quote. How a SkyEstimate is built.