The complete record
on every Chicago building
Habitability conditions, permit reinvestment, ownership, enforcement, licenses, and taxes — assembled from city records into one property page, refreshed daily.
Living conditions as reported to the city and their resolution (or lack thereof)
Every condition tied to its inspection outcome.
The permit history, read as maintenance history and signals of reinvestment
Monitoring included — daily alerts on every building you unlock, so the record above stays current on its own.
Habitability conditions
What tenants actually report living with — heat, leaks, pests — with inspection outcomes, not just case numbers.
Permit reinvestment
Is the building being kept up? Permit history shows what has been renewed — and which systems likely have not been touched.
Pending permit applications
Applications still in DOB review, harvested daily — see planned work before a permit ever issues.
Ownership & sales
Every parcel, sale, and taxpayer behind an address — and the rest of the owner's portfolio, one click from their name.
Tax assessment
Assessed values, property class, and commercial valuations straight from the Cook County Assessor.
Business licenses
Active licenses at the address and new filings nearby — who is operating what, and where.
Complaint context
Why a 311 complaint was actually filed, with owning department, resolution benchmarks, and stage-by-stage workflow.
City context
Ward, community area, transit, landmark status, flood and O'Hare-noise designations.
Monitoring & alerts
Daily email alerts on every building you unlock — new complaints, violations, and permits the day the city logs them.
311 enrichment, in depth
Only what's owner-relevant
Chicago's 311 system has more than 110 complaint types. Only 29 ever land on a building owner as something to act on — those are on by default, and the rest never reach your inbox.
Every department, tracked
The owning department decides the clock, the cost, and whether the fine is real. We tag it on every complaint — Buildings, Streets & Sanitation, Water Management, BACP, Public Health, and beyond.
Violations and permits, too
Complaints are the early warning. We also track DOB violations and permit filings at the address level — with real current status, not the city’s inspection-history maze.
The full story on any Chicago building
What tenants report living with, and whether the owner is keeping the building up — complaints, permits, ownership, and taxes in one permanent property unlock. Simple flat pricing.
- For buyers and their agents weighing one condo building
- Building systems ledger — roof, elevators, facade, plumbing, electrical — with permitted work and open violations
- Ten peer buildings compared on year, units, dues, and permitted work per unit
- The questions to ask the broker or management, and a gift link that shares the report for 10 days
Prepared for The Boardwalk, 4343 N Clarendon Ave. Professional includes 3 a month.
- 5 unlock credits every month — credits accumulate and never expire
- Every unlock is permanent: full 311 complaint detail, ownership, and sales history for that building
- Monitoring included on every building you unlock — daily email alerts, no caps
- Your first unlock is free — no card required
- Everything in Citizen, plus
- 50 unlock credits every month — credits accumulate and never expire
- 3 building reports a month — the $25 report, included
- Pending permits: applications still in DOB review, citywide on Explore and on every property page
- Full review timelines on pending applications
- Everything in Professional, plus
- Per-unit pricing — never more than $1/unit/mo
- Unlimited property unlocks and monitoring
- Customized lead feeds
- API access for alerts
Every Chicago address is free to search, no account required. Your first property unlock is free. Credits are a balance, not an allowance — unused credits carry over indefinitely. Flat pricing, no per-seat or other hidden fees.
Hello. I'm a solo founder with a background in accounting and M&A finance for companies with large real estate portfolios. I'm also a transplant to Chicago who fell in love with the city's ingenious design and the people who live here. Property Sentinel is my attempt to capitalize on the city's powerful but scattered public data to make buildings better, neighborhoods safer, and Chicago smarter.
If you want to discuss how Property Sentinel can help your organization or our city, please reach out.