St. Louis County Assessor Property Search 2026: Owner, Map & Tax

by
St. Louis County, Missouri • owner, locator, tax and GIS help

Search by Locator, Owner or Address

St. Louis County property records are split among the County Assessor, Collector of Revenue, Recorder of Deeds and GIS systems. Start with the Assessor when you need a locator number, owner display, assessed value or property details.

This 2026 guide shows how to search by owner, name, address or locator number, use the parcel map, check taxes, understand an even-year assessment, find deeds and handle an assessment appeal without confusing St. Louis County with the independent City of St. Louis.

Choose My Search Search Step by Step County or City?
Best exact search key Locator Number Find it once, then reuse it for assessment, tax and map research.
Jurisdiction County ≠ City St. Louis County and the independent City of St. Louis maintain separate property systems.
2026 assessment cycle Even-numbered year Many real-property values carry forward from the 2025 reassessment unless a qualifying change occurred.
Best identifier Locator number Use it to reduce owner-name and street-address ambiguity.
2026 BOE filing July 13 deadline passed Already-filed appeals may still have later State Tax Commission deadlines.

Fast Answer: Where Should You Search?

For a St. Louis County assessor property search by owner, name, address or locator number, start with the County Assessor Real Estate Search. For tax balances and receipts, use Property Tax Inquiry. For deeds and liens, use the Recorder of Deeds. For parcel-map context, use PropertyView.

Independent guide: AssessorPropertySearch.org is not St. Louis County Government, the County Assessor, Collector of Revenue, Recorder of Deeds or Board of Equalization. You do not need to submit private payment or identity information to this website to use the official public property-search resources described below.

St. Louis County vs St. Louis City vs St. Charles County

Broad searches for “St Louis MO assessor property search” often send users to the wrong jurisdiction. Check the actual county before searching an owner.

Property location
Use this system
Common mistake
St. Louis County
St. Louis County Assessor Real Estate Search
Opening the City of St. Louis address database because the mailing address says “St. Louis.”
Independent City of St. Louis
City of St. Louis Assessor and City property databases
Searching County records for a parcel that is legally inside City limits.
St. Charles County
St. Charles County Assessor and Property Database
Using St. Louis County because the property is part of the wider St. Louis metro area.

Property is actually in St. Louis City?

City and County have separate Assessor, Collector and Recorder systems. Use our City-specific guide rather than forcing the address into the County portal.

St. Louis City Property Search Guide

Property is in St. Charles County?

St. Charles County has its own elected Assessor, property database and GIS system. Its Assessor also warns that assessment maps are not legal surveys.

Official St. Charles County Assessor Open St. Charles County Assessor

How to Search St. Louis County Property Records

This workflow gets you from a street address or owner name to the locator number, then to tax, GIS or deed records.

Confirm the property is in St. Louis County

Do not assume an address with “St. Louis, MO” belongs to County government. Separate City and St. Charles County records before continuing.

Choose your strongest search key

Use the locator number when you already have it. Otherwise begin with the property address, owner name or subdivision.

Open the County Assessor Real Estate Search

Run the least complicated search first. Avoid adding unnecessary owner, address and subdivision fields at the same time.

Verify the matching property

Compare the property address, owner display, subdivision, classification and other available parcel details rather than trusting only one matching name.

Save the locator number

The locator number is the most useful repeat-search key for assessment, tax, map and County-office questions.

Move to the correct next database

Use Property Tax Inquiry for bills or receipts, PropertyView for GIS context and the Recorder of Deeds for recorded legal documents.

Search by Locator Number, Owner Name, Address or Subdivision

Different search fields solve different problems. Use one reliable field first, then narrow the result only when needed.

Search type
Best use
Micro-level search tip
Locator number
Exact property match and repeat research.
Copy it from an official search result, tax bill or assessment notice. Do not guess missing characters.
Owner name
Finding property associated with a person, trust, estate or business.
Try the surname alone, then add a first name. For entities, test the main LLC/trust wording without excessive punctuation.
Property address
Best starting point for most homeowners and buyers.
Start with house number and main street name. Remove unit labels, directions or suffixes if the first search fails.
Subdivision
Finding lots where the address is incomplete or the subdivision name is known.
Use a distinctive part of the subdivision name and inspect the returned locator/address matches.
Property number in tax portal
Tax bill, receipt and payment-status research.
Confirm the tax year and Real Estate record type before relying on a balance.
Owner-search trick: when a recent buyer does not appear, search the address first and note the current owner display. A deed transfer and the Assessor database can update on different schedules.

What a St. Louis County Real Estate Record Can Show

Use the Assessor record as a tax-assessment research record. It is not a replacement for the recorded deed, title work or a boundary survey.

Record detail
How it helps
Important limitation
Locator number
Identifies the specific County real estate account.
Verify it against the address before using it for a payment or appeal.
Owner display
Helps identify the owner carried on the assessment record.
It is not conclusive title evidence and can lag behind a newly recorded deed.
Property address
Confirms the physical property being assessed.
The owner mailing address may be different.
Market value
Shows the Assessor’s value used in the assessment process.
It is not automatically the current asking price or tax bill.
Assessed value
Shows the statutory percentage of market value used before tax levies are applied.
Assessment percentage is not the same thing as the property-tax rate.
Classification
Helps explain which Missouri assessment percentage applies.
Mixed-use or special property should be reviewed carefully.
Land / improvement data
Helps identify valuation components and possible factual errors.
County valuation components are not insurance replacement-cost estimates.
Subdivision / legal clues
Helps move from Assessor search to map or deed research.
Use the Recorder and survey documents for legal ownership/boundary work.

St. Louis County Assessor Property Search Map

Use PropertyView after you have the correct locator number or verified address. A map is much easier to interpret when you already know which parcel record is correct.

Parcel location

Use the map to orient the property against streets and nearby parcels.

Nearby context

GIS can help with neighboring parcel research and location context when comparing Assessor records.

Not a legal survey

Do not settle fence, easement, encroachment or legal-boundary questions from a web parcel line alone.

Best map workflow

  1. Search the property in the Assessor database first.
  2. Copy the locator number and confirmed situs address.
  3. Open PropertyView and locate the same parcel.
  4. Compare the parcel context with the Assessor record.
  5. Use recorded plats, deeds and a survey when the question is legal rather than informational.
St. Louis County PropertyView Open PropertyView Map

Why 2026 Is Different: Missouri’s Even-Year Assessment Cycle

Missouri real estate is generally reassessed in odd-numbered years. That makes 2026 different from the countywide 2025 reassessment year.

2026 rule in plain English: for many properties, the value established in the preceding odd-numbered year carries into the following even-numbered year. New construction, improvements or other qualifying physical changes can still affect an even-year record.
Missouri real estate class
Assessment percentage
What that means
Residential
19%
Assessed value is generally 19% of true market value before tax levies are applied.
Agricultural
12%
Agricultural real property uses a different statutory assessment percentage.
Commercial / other real property
32%
Commercial and other qualifying real estate generally use the 32% assessment percentage.

Why did my value not change in 2026?

An unchanged 2026 value can be normal because the real-property reassessment cycle is centered on odd-numbered years. If the property had no qualifying physical change, the prior odd-year value may carry forward.

Why could my value change in an even year?

New construction, demolition, improvements or another material physical-property change can cause the Assessor to update an even-year record. Review the property characteristics before assuming the change is an error.

Do not calculate tax by multiplying market value by a tax rate. Missouri first applies the statutory assessment percentage, then local tax levies are applied to assessed value.

Search St. Louis County Real Estate Tax Records and Receipts

The Property Tax Inquiry system is the better route when your question is “What do I owe?”, “Was this paid?” or “Can I print a receipt?”

Open Property Tax Inquiry

The quick search accepts a property number, owner name or address.

Select the correct result type

Separate Real Estate from Personal Property results so a vehicle or personal-property account is not mistaken for a real estate parcel.

Confirm the property number and owner

Match the address and property identifier before relying on a balance or making a payment.

Check the tax year

Historical tax records and the current assessment year are different. In mid-2026, a prior-year tax record does not automatically tell you the eventual 2026 tax bill.

Print or save the receipt when needed

The County Collector directs taxpayers to the Property Tax Inquiry and Payment page to review account details and print available receipts.

Official St. Louis County Property Tax Inquiry Search Tax Account

St. Louis County Property Assessment Appeals in 2026

The normal County Board of Equalization filing period for 2026 has already ended, but owners who filed timely appeals may still have hearings, decisions or later State Tax Commission deadlines.

May 1, 2026 — County appeal window opened

St. Louis County allowed property owners to begin filing 2026 assessment appeals with the Board of Equalization.

July 13, 2026 — ordinary BOE filing deadline

The second Monday in July fell on July 13 in 2026. County guidance states that 2026 appeals had to be filed by this date.

After a BOE decision — review the State Tax Commission deadline

The Missouri State Tax Commission generally requires a Complaint for Review of Assessment by September 30 of the assessment year or within 30 days after the BOE decision, whichever is later.

As of August 12, 2026: the ordinary St. Louis County BOE filing deadline has passed. Do not submit a new ordinary County appeal as though the July 13 deadline were still open.

If you already filed with the BOE

  • Keep the appeal confirmation and locator number.
  • Follow the hearing notice and evidence instructions.
  • Keep your BOE decision letter when it arrives.
  • Calendar any further-review deadline immediately.
  • Use the State Tax Commission route only when you meet its filing requirements.

State Tax Commission filing details that matter

Requirement
Current Missouri guidance
BOE decision letter
Upload the BOE decision letter as a PDF when filing online, except for narrow exceptions.
Locator / account number
Enter the parcel, locator or account number shown on the BOE decision.
Evidence at initial STC filing
The State Tax Commission tells users not to upload appraisals or photographs with the initial online complaint; evidence instructions come later.
Confirmation
The appeal is not considered properly filed online until an email with an appeal number is received.
Legal-entity owner
The STC says a corporation, partnership, LLC, trust, association or estate must be represented by an attorney.
Review County Appeal Information Missouri State Tax Commission Appeal

Find St. Louis County Deeds, Liens and Recorded Land Records

Use the Recorder when your question is legal-record based: deed, mortgage/deed of trust, lien, release, subdivision plat or recorded copy.

Start with Assessor clues

  • Locator number.
  • Owner spelling.
  • Property address.
  • Subdivision or legal-description clue.
  • Approximate transfer date.

Then search Recorder records

  • Current and prior owner names.
  • Likely recording period.
  • Document type.
  • Subdivision information.
  • Book/page or other recorded reference when known.

Current deed-copy details

Request
Current Recorder information
Basic deed copy
$2 for the first page and $1 for each additional page.
Certified copy
An additional certification charge applies; confirm the current total before ordering.
Walk-in deed-copy payment
The Recorder currently requires credit or debit card payment for self-service deed-copy requests rather than cash or check.
Post-1974 deed copy
Walk-ins are generally welcome Monday–Thursday during the posted deed-copy service period.
Pre-1974 deed research
The Recorder asks users to schedule an appointment for document research.
Complex deed research
An appointment is recommended when the address or dates are unknown, multiple people are involved, or the record predates 1974.
Ownership rule: if the Assessor shows an unexpected owner, do not conclude that the deed is wrong. Search the recorded instrument first. Assessor and Recorder records serve different purposes and may update at different times.
Official Recorder of Deeds Recorder of Deeds Information

Recently Bought, Split or Changed the Property?

A recent real estate transaction can create temporary differences among deed, Assessor, tax and map records.

After a recent purchase

  • Confirm the deed was recorded.
  • Save the recorded-document reference.
  • Search the Assessor by address even if your name is not displayed yet.
  • Save the existing locator number.
  • Check the owner mailing address for future notices.
  • Review the tax account separately.

After a parcel or boundary change

  • Expect mapping and assessment databases to require processing time.
  • Keep the recorded plat or survey information.
  • Do not guess a new locator number.
  • Contact the Assessor when the expected parcel configuration does not appear.
  • Do not use an old map screenshot as proof of the new legal boundary.
Processing reality: County guidance indicates parcel boundary or plat-related changes can take several months to work through mapping and assessment systems. A recently recorded change may therefore appear in Recorder records before every online property view is updated.

St. Louis County Property Search Not Working? Fix It Here

Problem
Likely reason
Best next step
Address returns nothing
Search formatting is too specific.
Remove unit, direction, ZIP and street suffix; retry house number + street name.
Owner search returns nothing
Trust, LLC, estate, spelling variation or recent transfer.
Use surname only, entity-name variation or search the address instead.
Too many owner matches
Common surname or business name.
Use address/subdivision clues and save the correct locator number.
No record in County
Property may be in the independent City of St. Louis or another county.
Confirm jurisdiction before changing the spelling repeatedly.
Tax page shows a different year
Tax records and current assessment records have different annual timing.
Confirm tax year, assessment year and property number separately.
Owner is outdated
Recent deed has not fully propagated to the assessment display.
Verify the recorded deed, then contact the Assessor if the update remains unresolved.
Parcel map does not match fence
GIS lines are not legal survey evidence.
Use the recorded plat/deed and a professional survey for boundary questions.
Property was split but map is old
Boundary/parcel processing can take months.
Keep the recorded plat information and ask the Assessor about mapping status.
Legacy search page will not load
Older County interfaces can be sensitive to browser/session settings.
Retry in a current browser, disable aggressive blocking for the government site or start from the County Assessor homepage.

St. Louis County Assessor, Recorder and Appeal Contacts

Have the property address and locator number ready before calling. For an appeal, also have the assessment notice or BOE decision.

Office
Use it for
Current contact details
St. Louis County Assessor
Value, locator number, owner display, assessment record and property-data corrections.
41 South Central Avenue, 3rd Floor, Clayton, MO 63105
314-615-2555
Assessor@stlouiscountymo.gov
In person: Mon–Fri 8:00 a.m.–3:30 p.m.
Phone: 8:30 a.m.–4:30 p.m.
Recorder of Deeds
Deeds, plats, liens, recorded instruments and copies.
41 South Central Avenue, Clayton, MO 63105
314-615-7100
Recorder@stlouiscountymo.gov
Mon–Thu 8:00 a.m.–3:30 p.m.
Board of Equalization
Formal County assessment appeals and hearing questions.
Use the current County BOE appeal page and your filed appeal confirmation. For current appeal questions, use the contact route shown on the County BOE page.
Missouri State Tax Commission
Qualifying appeal after the County BOE process.
573-751-1715
Review the current Complaint for Review of Assessment filing instructions before submission.

Assessor call script

“I am calling about locator number [number] at [address]. I need help with the [owner display / 2026 value / property characteristic / mapping] record. The specific issue is [one sentence].”

Tax-record script

“I need to verify the real estate tax record for property number [number], tax year [year]. I am checking the [balance / paid status / receipt] for [address].”

Recorder script

“I need a recorded property document for [address/party]. I have the approximate recording date and [owner / subdivision / document reference]. What search or copy method should I use?”

Official St. Louis County Property Search Links

Use these after deciding which record you need. The article above explains the search fields and limitations so you can use the official portal more efficiently.

Assessor office

Contact information, assessment responsibilities and current County Assessor resources.

County Assessor

Real Estate Search

Start here for locator, owner, address and real property assessment research.

Real Estate Search

Tax Inquiry

Search available tax records using property number, owner name or address.

Tax Search

Property map

Use PropertyView for GIS and parcel-location context.

PropertyView

Recorder of Deeds

Use for recorded deeds, liens, subdivision plats and document copies.

Recorder Resources

Missouri assessment appeal

Use after the County BOE process when a qualifying State Tax Commission appeal remains available.

State Tax Commission

St. Louis County Assessor Property Search FAQs

What is the official St. Louis County assessor property search?

Use the St. Louis County Assessor Real Estate Search for county real property assessment records. It is the correct starting point for locator-number, owner, address, subdivision and assessment research.

Can I search St. Louis County property records by owner name?

Yes. Owner-name searching is a standard route for St. Louis County real estate records. If the full owner name fails, try the surname, trust name, LLC name or property address and then verify the matching locator number.

Can I search St. Louis County property records by address?

Yes. Start with the street number and main street name. If the search returns nothing, remove unit information, directions, ZIP code and unnecessary street suffixes before retrying.

Is St. Louis County property search free?

The basic official Assessor and Property Tax Inquiry routes are public search resources, so a paid private lookup service is not required for basic parcel, owner, assessment or tax-record research. Fees can apply when ordering recorded document copies or other special services.

What is a St. Louis County locator number?

The locator number is a key identifier for a specific real estate account in St. Louis County. Save it after finding the correct parcel because it is more precise than a common owner name or street address for later research.

Where is the St. Louis County assessor property search map?

Use St. Louis County PropertyView for parcel-map and GIS context. Find and verify the property in the Assessor search first, then use the locator number or confirmed address to reduce map-search mistakes.

Why did my St. Louis County property value not change in 2026?

Missouri real estate is generally reassessed in odd-numbered years. Because 2026 is an even-numbered year, many real-property values carry forward from 2025 unless new construction, improvements or another qualifying physical change affects the property.

Is St. Louis County property search the same as St. Louis City property search?

No. The independent City of St. Louis and St. Louis County are separate jurisdictions with separate Assessor, tax and land-record systems. Confirm jurisdiction before searching.

Where do I find a St. Louis County deed or lien?

Use the St. Louis County Recorder of Deeds for recorded deeds, liens, releases, subdivision plats and related instruments. An Assessor owner display is useful for research but is not a substitute for the recorded legal document.

Can I still file a normal 2026 St. Louis County assessment appeal?

The ordinary 2026 St. Louis County Board of Equalization filing deadline was July 13, 2026 and has passed. Owners who filed a timely County appeal should follow their BOE hearing and decision instructions; a qualifying Missouri State Tax Commission appeal generally has its own later statutory deadline.

Best Search Order

Confirm that the parcel is really in St. Louis County, search the Assessor by locator number, owner or address, save the locator number, and then move to the tax, GIS or Recorder system that answers your actual question.

For legal ownership, use recorded deeds. For boundaries, use recorded plats and a survey. For taxes, use Property Tax Inquiry. For an assessment dispute, follow the current BOE or Missouri State Tax Commission deadline rather than relying on an old reassessment-year date.

Property Search Smart Helper

Find the Right Property Record, Tax Bill, Deed or Assessor Search Route

Use this helper before searching county property records. It helps you choose the right office, prepare the right details, avoid wrong-office mistakes, and review property records safely.

Official-source focused Use county assessor, appraiser, auditor, tax collector, treasurer, recorder, clerk, GIS and appeal resources where available.
Not legal or tax advice Always confirm values, taxes, deeds, exemptions, appeals and deadlines with the official county office.
Works across states Designed for APN, PIN, parcel number, STRAP, folio, account number, GIS map and deed-record searches.

Property Search Route Finder

Choose what you have and what you want to find. The tool will suggest the best search route and common mistake to avoid.

Copied.

Parcel / APN / PIN Format Helper

Parcel numbers are formatted differently by county. Try these variations if your official search does not return results.

This tool does not send or store your entry. It only creates search-format ideas on this page.
Copied.

Assessor, Tax Collector, Recorder or GIS?

Select your issue and this tool will show the office that usually handles it.

Choose an option above
This finder helps prevent wrong-office mistakes. Exact office names vary by state and county.

Simple Property Tax Estimate Helper

This is a general estimate only. State and county tax rules differ, so always verify final bills with the official tax collector, treasurer or county tax office.

Copied.

Exemption / Appeal Readiness Checklist

Use this before applying for an exemption or challenging a value. Missing proof is one of the biggest reasons users waste time or miss deadlines.

Property Record Review Checklist

Review these fields before relying on any assessor, appraiser, auditor, property appraiser, tax or deed record.

Official-source and accuracy note: This helper is for educational use only. Property values, tax bills, deeds, exemptions, GIS boundaries and appeal deadlines can change. Always confirm final information with the official county assessor/appraiser/auditor, tax collector/treasurer, recorder/clerk, GIS office or appeal board.