St. Louis County Assessor Property Search & Tax Lookup 2026

St. Louis County Missouri Property Records Navigator

Find St. Louis County Property Values, Locator Numbers and Real Estate Taxes

St. Louis County’s Assessor establishes real and personal property values and classifications. The Department of Revenue’s Collector of Revenue handles tax billing, collection and receipts, while the Recorder of Deeds maintains deeds, deeds of trust, liens, releases and subdivision records.

This 2026 guide shows how to search by locator number, owner, address or subdivision; read market and assessed values; calculate Missouri assessment ratios; understand why 2026 differs from the 2025 reassessment year; check tax bills and receipts; use the Senior Property Tax Freeze; review appeal options; and obtain deed or lien records.

Search locator number, owner, address or subdivision
Decode market value versus assessed value
Check 2026 appeal and senior-freeze status
Route taxes, receipts, deeds and liens correctly
County Assessor Jake Zimmerman
Assessor telephone 314-615-2555
Property identifier Locator number
2026 BOE deadline July 13 — passed
Last reviewed August 7, 2026
Current August 2026 position

What St. Louis County Property Owners Should Know Right Now

The normal 2026 Board of Equalization appeal filing period is over. Appeals could be filed from May 1 through the second Monday in July, which was July 13, 2026. Property owners who already received a Board decision may still have a State Tax Commission deadline.
2026 is an even-numbered year Missouri reassesses real estate on a two-year cycle. The 2025 reassessment generally carries into 2026 unless a legally relevant change requires an adjustment.
2026 tax bill is not the same as assessment search Property taxes are levied later in the year. St. Louis County typically bills real and personal property taxes in November, with the statutory due date December 31.
Senior Freeze filing closed The 2026 Senior Property Tax Freeze application and renewal deadline was extended to July 10, 2026. The next filing cycle must be handled through Revenue.
Still waiting on a Board decision? A further complaint to the Missouri State Tax Commission is generally due by September 30 of the assessment year or within 30 days after the Board of Equalization decision, whichever is later.
Do not use City of St. Louis records for a county property. The independent City of St. Louis has its own Assessor, Collector and Recorder. This guide is for properties in St. Louis County, Missouri.
Start with the office that owns the record

Assessor, Collector of Revenue and Recorder of Deeds

County Assessor

  • Real-estate market value
  • Residential, agricultural and commercial classification
  • Assessed value
  • Owner and property record display
  • Locator maps and parcel records
  • Property characteristics
  • Assessment corrections and exemption recommendations

Collector of Revenue

  • Real-estate tax bills
  • Personal-property tax bills
  • Tax payments and receipts
  • Paid and unpaid status
  • Property-tax prepayment program
  • Senior Property Tax Freeze administration
  • Delinquent real-estate collection

Recorder of Deeds

  • Warranty and quitclaim deeds
  • Deeds of trust
  • Liens and releases
  • Subdivision plats
  • Federal and state tax liens
  • Recorded-document copies
  • Certified deed copies
Common routing mistake: The Assessor does not collect your tax bill, and the Collector does not independently change the Assessor’s market value.
Different state, different system: Missouri converts market value to assessed value using classification percentages. Colorado uses different statutory assessment rates and California uses Proposition 13. Compare the existing Boulder County Assessor property search guide.

Choose the St. Louis County Property Task You Need

Find a property record Search by locator number, owner, address or subdivision and save the exact parcel identifier.
Check assessed value Compare market value, property classification and assessed value before estimating taxes.
Find a tax bill or receipt Use the Property Tax Inquiry to search real estate or personal property by property number, owner or address.
Review a 2026 appeal The county Board filing period has closed, but existing Board appellants may still have State Tax Commission rights.
Check Senior Tax Freeze Verify application or renewal status and prepare for the next Revenue filing period if the 2026 deadline was missed.
Find a deed or lien Use the Recorder of Deeds when you need recorded legal evidence rather than the Assessor’s ownership display.

Jump to Your St. Louis County Property Task

The key that connects county property systems

What Is a St. Louis County Locator Number?

AREA
CODE
PARCEL
BLOCK
PROPERTY
ID

Use the locator number for:

  • Assessor real-estate research
  • Property-tax inquiry
  • Board of Equalization appeal filing
  • Map and parcel questions
  • Senior Freeze property identification
  • Recorder or deed-copy research when paired with other document information
Where to find it: The county states that the real-estate locator number can be found on an assessment-change notice, a prior real-estate tax bill or the Real Estate Search page.
Do not confuse it with a personal-property account number. Individual personal-property accounts begin with the letter “I.” Real estate uses a locator/parcel number.

St. Louis County Real Estate Record Field Decoder

Locator Parcel identifier.
Owner Assessment listing.
Market Value Assessor opinion.
Class Residential/ag/commercial.
Assessed Value Taxable percentage.
Tax District Levy-area clue.
Record field What it means What to verify
Locator Number St. Louis County’s property identifier. Match it on assessment and tax records before paying or appealing.
Owner Name reflected in the Assessor’s ownership records. Use the Recorder’s deed when legal title rather than an assessment listing matters.
Market/Appraised Value Assessor’s opinion of true value in money. Compare with the correct assessment year and market evidence.
Residential Classification Real property used or intended for residential living. Residential property is assessed at 19% of market value.
Agricultural Classification Qualifying agricultural/horticultural land. Agricultural property is generally assessed at 12% of productive or market value under Missouri rules.
Commercial / Other Commercial, industrial and other real property not residential or agricultural. The statutory real-property assessment percentage is 32%.
Assessed Value Percentage of market value to which local tax levies are applied. Do not apply a tax levy directly to residential market value.
Taxing District Combination of school, fire, library, municipality and other jurisdictions serving the parcel. Nearby properties can have different combined levy rates.
2025 reassessment → 2026 even-year assessment

How the 2026 St. Louis County Assessment Cycle Works

2025 Reassessment Missouri real property is reassessed in odd-numbered years.
The Assessor established a new market-value opinion for the biennial cycle.
2025 Assessed Value Market value was converted to the statutory assessment percentage.
Classification determines whether 19%, 12% or 32% applies.
2026 Even Year The odd-year value generally continues into 2026.
New construction, improvements or another qualifying change can affect the even-year record.
2026 Tax Bill Taxing districts certify levies and the county bills later in the year.
The amount due is not determined by the Assessor alone.
Missouri’s two-year rule matters: A valuation decision in an odd-numbered reassessment year generally applies to the following even-numbered year unless circumstances such as new construction or improvements justify another change.
Do not compare 2026 directly with a current home-listing price and assume an error. First identify which assessment cycle and valuation evidence the Assessor used.
Missouri assessment-ratio formula

How St. Louis County Converts Market Value Into Property Tax

Residential

Residential real property is assessed at 19% of true market value.

Agricultural

Agricultural/horticultural real property is assessed at 12% of applicable productive or market value.

Commercial / Other

Commercial and other nonresidential, nonagricultural real property is assessed at 32%.

Market value Assessor’s true-value opinion
×
Assessment ratio 19%, 12% or 32%
×
Combined levy ÷ 100 Tax rate for that location
Example only: A $300,000 residential property has a $57,000 assessed value at 19%. If the parcel’s combined levy were $8.00 per $100 assessed value, the estimated tax would be $4,560. The real levy must be taken from the actual tax record.
There is no single countywide property-tax rate. School districts, municipalities, fire districts, libraries and other taxing entities create different combined levy rates across St. Louis County.
2026 St. Louis County property-tax timeline

When the 2026 Real Estate Tax Bill Becomes Due

Assessment date Property status and ownership-related assessment questions start with the January 1 tax-year framework.
BOE filing opened 2026 property-assessment appeal filing began May 1.
BOE deadline Second Monday in July; the regular 2026 county appeal filing period closed.
Taxes levied Annual property taxes are levied after assessment and tax-rate certification.
Bills mailed St. Louis County normally bills real and personal property taxes in November.
Statutory due date 2026 property taxes are due and collectible by December 31.
January 1, 2027: Any unpaid 2026 taxes become delinquent, and the unpaid real-estate tax becomes an enforceable lien on the property.
No-cost county prepayment option

Spread St. Louis County Property Taxes Across the Year

Who can enroll Taxes must be current. The prepayment amount starts with last year’s tax and divides it into four estimated payments.
How the final payment works The December payment is adjusted after the actual current-year bill is finalized.
Quarter 1 First voluntary prepayment.
Quarter 2 Second voluntary prepayment.
Quarter 3 Third voluntary prepayment.
Final bill County mails the finalized annual tax bill.
Final payment Fourth amount is adjusted to the actual 2026 tax.
Enrollment continues County instructions state there is no need to reapply every year.
No program fee: St. Louis County describes the prepayment program as no-cost. Prepaid amounts do not earn interest.
Missing a voluntary quarterly date is not the same as missing the statutory tax deadline. The county states that no interest or penalty is charged merely for missing a prepayment date, but ordinary delinquency rules apply to any tax remaining unpaid after December 31.
Current submission limitation: The county’s 2026 enrollment form states that prepayments are accepted by mail or in Clayton and are not currently accepted online or at satellite offices.
Open the 2026 Prepayment Enrollment Form Enter real-estate address and locator number, owner contact details and return the completed enrollment to Revenue.
Senior Property Tax Freeze / Credit

What St. Louis County Seniors Need to Know in 2026

The 2026 application and renewal deadline has passed. St. Louis County extended the deadline to July 10, 2026. New applicants and prior participants who were required to renew needed to complete the 2026 process by that date.
62+
Age

Applicants generally must meet the Missouri senior age requirement applicable to the program.

HOME
Primary residence

The qualifying property must be the applicant’s principal residence rather than a rental or second home.

TITLE
Ownership interest

Prepare deed or trust documentation showing the required legal or equitable interest in the residence.

YEAR
Annual process

Do not assume approval remains active forever without action. Follow the county’s annual application or renewal instructions.

The program does not literally freeze the Assessor’s market value. The Assessor can continue to maintain the legally required assessment. The senior program operates through the tax-credit/freeze calculation administered through the Revenue Department.
Missed July 10? Do not submit an outdated form and assume it will be accepted. Use the current Senior Property Tax Freeze page to watch for the next filing period and instructions.
Keep supporting documents: Proof of age, identity, primary residence, deed or trust interest and responsibility for the real-estate tax can be important when applying or resolving an incomplete file.
Open Senior Property Tax Freeze Check the current application system, next filing period, renewal requirements and document instructions.
2026 county filing period closed July 13

St. Louis County Property Assessment Appeal Path

Review Assessor record Determine the county market value, classification and assessed value.
Board of Equalization County appeals could be filed May 1 through July 13, 2026.
Board decision Keep the written decision and findings because they are needed for a State Tax Commission complaint.
State Tax Commission Generally file by Sept. 30 or within 30 days after the Board decision, whichever is later.

Evidence that supports a value appeal

  • Property locator number
  • Owner’s opinion of market value
  • Recent arm’s-length sales
  • Professional appraisal
  • Sales contract
  • Property-condition photographs
  • Construction or repair estimates
  • Building-size corrections
  • Classification evidence
  • Written explanation of evidence
“My taxes are too high” is not the strongest valuation argument. The appeal process focuses on fair market value, property classification or assessment ratio. State guidance recommends stating what you believe the property is worth and providing evidence supporting that amount.
Even-year appeal: Missouri allows an even-year real-estate appeal in certain circumstances, including where the taxpayer did not appeal the prior odd-numbered reassessment year. The 2026 St. Louis County Board filing deadline has nevertheless already passed.
Already completed the county Board? The Missouri State Tax Commission complaint deadline is generally September 30, 2026 or 30 days after the Board decision, whichever is later. Upload or include the Board decision letter.
“I am reviewing St. Louis County locator number __________. The Assessor’s market value is __________ and my supported opinion of fair market value is __________. My evidence includes __________. Please confirm whether my remaining 2026 review route is with the Board, State Tax Commission or a record-correction process.”
Recorder of Deeds

How to Research St. Louis County Deeds, Liens and Recorded Documents

Use Assessor first for parcel identity Copy the locator number, property address and owner display before beginning deed research.
Use Recorder for legal instruments Research deeds, deeds of trust, releases, liens, plats and other writings affecting real or personal property.
Use a certified copy when needed Courts, lenders, government agencies and legal transactions may require a certified rather than ordinary photocopy.
Prepare the property address and owner names. Recorder research works best when you know the approximate acquisition date and names appearing on the document.
Identify the document type. Examples include warranty deed, quitclaim deed, deed of trust, lien release or subdivision plat.
Use book/page or document number when known. These identifiers greatly speed copy requests.
Request a deed copy. Recorder copy requests ask for property address, owner names, approximate purchase date and the document requested.
Search separately for later releases. A deed of trust or lien does not tell you by itself whether a later release or satisfaction was recorded.
Recorder service Current published cost Practical note
Deed copy — first page $2 Standard copy charge.
Each additional page $1 Most printed deeds total about $5 depending on length.
Certification Additional $1 Add when an official certified copy is required.
In-person credit-card convenience fee 2.29%, $2 minimum Third-party transaction fee for deed-copy purchases.
In-person debit-card convenience fee 0.85% Current Recorder debit-card transaction fee.
1974 document threshold: The Recorder states that deed copies recorded after 1974 are available through its current service locations. Research involving pre-1974 deeds or uncertain dates may require an appointment in Clayton.
Assessor ownership is not a substitute for title research. A recorded deed is stronger evidence of conveyance, and a complete title or lien determination may require a title company or attorney.
Open Recorder of Deeds Review deed-copy options, appointments, recording information and current payment requirements.
Vehicles and business equipment use a different assessment system

Do Not Mix Real Estate With Personal Property Records

Individual personal property Vehicles and other taxable personal property are based on what the taxpayer owned or controlled on January 1.
Account number Individual personal-property account numbers begin with the letter “I.”
Annual declaration Personal property is handled annually rather than on the same odd/even real-estate reassessment cycle.
2026 business declarations: The county’s 2026 forms instructed businesses and manufacturers to return required declarations by March 1 to avoid penalty.
Moving after January 1 does not automatically erase the current-year personal-property assessment. Missouri personal-property liability is tied to January 1 ownership/residency rules.
Assessor display versus recorded title

What to Do When the Owner Name or Address Is Wrong

Mailing address issue Contact the Assessor or Revenue using the locator number and explain which mailing record needs correction.
Owner name is outdated Check whether the deed was recorded and allow time for the recorded transfer to flow into assessment records.
Need to add or remove an owner That is a title matter, not a simple Assessor name edit. Use a legally appropriate recorded instrument.
Trust ownership Keep the deed and trust documentation available when dealing with Senior Freeze eligibility, assessment records or legal ownership questions.
Do not record a deed merely to “fix the website.” A deed can create major legal, tax, estate and mortgage consequences. Use professional advice when changing legal ownership.

St. Louis County Property Checklist by Situation

Situation Records to review Next action
Home buyer Locator, owner, market value, assessed value, tax bill, deed, deed of trust and tax district. Confirm both current taxes and recorded title before closing.
Current homeowner 2025 reassessment value, 2026 assessment, classification and building facts. Correct factual errors and track the next reassessment cycle.
Senior homeowner Age, primary residence, deed/trust, prior freeze status and annual renewal. Because the 2026 deadline passed July 10, watch Revenue for the next filing period.
2026 BOE appellant Appeal form, evidence, hearing notice and Board decision. Check the State Tax Commission deadline immediately after the Board decision.
Mortgage escrow customer Annual tax bill, lender disbursement and county payment receipt. Confirm the Collector shows payment before sending a duplicate.
Rental-property owner Classification, market value, tax district, tax bill and deed. Do not assume owner-occupied senior or homestead-style relief applies.
Deed or lien researcher Property address, owner names, purchase date, document number, book/page and releases. Use Recorder records rather than the Assessor alone.
Personal-property taxpayer “I” account number, declaration, January 1 ownership and tax receipt. Use the personal-property side of the Assessor and tax inquiry system.

St. Louis County Assessor, Revenue and Recorder Contact Details

County Assessor 41 South Central Avenue
3rd Floor
Clayton, MO 63105
314-615-2555
Assessor@stlouiscountymo.gov
In person: 8 a.m.–3:30 p.m.
Telephone: 8:30 a.m.–4:30 p.m.
Department of Revenue 41 South Central Avenue
Clayton, MO 63105
314-615-5000
Use for Collector, tax-payment and Revenue routing questions.
Recorder of Deeds 41 South Central Avenue
Clayton, MO 63105
314-615-7100
Recorder@stlouiscountymo.gov
Current published counter hours: Monday–Thursday, 8 a.m.–3:30 p.m.
Office schedules changed during 2026: St. Louis County has adjusted some public-facing office hours and service locations. Verify the responsible department’s current schedule before traveling, especially for Recorder research or Senior Freeze assistance.

St. Louis County Property Search Problems and Fixes

Problem Practical fix Correct office
Address search returns no property Use only street number and main street name, then try owner or subdivision. Assessor
Owner search returns too many parcels Use the locator number, address or subdivision to narrow results. Assessor
Property is actually in St. Louis City Stop using county systems and switch to City of St. Louis property records. City offices
Tax bill cannot be found for 2026 yet The finalized annual bill is normally generated later in the year; save the locator and check after billing begins. Collector of Revenue
Assessed value seems much lower than market value That can be normal because residential property is assessed at 19% of market value. Assessor
Estimated tax is wrong Use assessed value and the parcel’s actual combined levy rather than a countywide average. Assessor / Revenue
2026 value looks like 2025 That can be correct because 2026 is the even year following the 2025 reassessment. Assessor
Board appeal deadline was missed Ask whether a narrow late-notice, new-owner or other statutory route applies; do not assume an exception. BOE / State Tax Commission
Already have a BOE decision Check the Sept. 30 or 30-days-after-decision State Tax Commission deadline immediately. Missouri State Tax Commission
Senior Freeze missing Review whether the 2026 application/renewal was completed by the extended July 10 deadline. Revenue
Owner listing is wrong Check the recorded deed and then contact the Assessor with the locator and recording information. Recorder then Assessor
Need proof taxes were paid Print the Collector’s tax receipt rather than the Assessor property page. Collector of Revenue
Need proof of legal ownership Obtain the recorded deed or title evidence; the Assessor listing is not a title opinion. Recorder / title professional
Need to spread annual tax cost Review the county’s no-cost four-part property-tax prepayment program while taxes are current. Revenue
“I need help with St. Louis County locator number __________ at __________. My question concerns market value, assessed value, classification, the 2026 tax bill, Senior Freeze, appeal status, ownership, deed or payment receipt. Please confirm which county office owns the record and what documentation I should provide.”
Official St. Louis County routes

Final Property Search and Tax Action Center

Prepare the locator number, property address, owner name, assessment year, tax year and any deed or Board decision information before opening an official county system.

10 title-specific answers

St. Louis County Assessor Property Search and Tax Lookup FAQs

1. How do I search St. Louis County Missouri property records?

Use the official St. Louis County Assessor Real Estate Search. The most useful search methods are locator number, owner name, property address and subdivision. After identifying the correct parcel, save the locator number for tax, appeal and map research.

2. What is a St. Louis County locator number?

The locator number is the county’s key real-estate parcel identifier. It appears on assessment notices and prior real-estate tax bills and can also be found through the Assessor Real Estate Search. Use it whenever possible because it reduces owner-name and address ambiguity.

3. Is St. Louis County the same property system as the City of St. Louis?

No. The independent City of St. Louis and St. Louis County maintain separate assessor, tax and recorder systems. This guide covers St. Louis County, Missouri, including county municipalities and unincorporated areas rather than City of St. Louis property.

4. Why is my St. Louis County assessed value lower than the market value?

Missouri taxes real estate on an assessed percentage of market value. Residential real estate is assessed at 19%, agricultural property at 12% of applicable productive or market value, and commercial or other real property at 32%.

5. Is St. Louis County reassessing all real estate in 2026?

2026 is an even-numbered year following the 2025 biennial reassessment. The prior odd-year value generally continues into the even year unless new construction, improvements or another legally relevant event requires a change.

6. When are St. Louis County 2026 property taxes due?

Property taxes are generally levied in October, billed in November and due and collectible by December 31, 2026. Unpaid taxes become delinquent January 1, 2027, and unpaid real-estate taxes attach as an enforceable lien.

7. How do I find a St. Louis County property tax bill or receipt?

Use the official St. Louis County Property Tax Inquiry. Search by Property Number, Owner Name or Address, select Real Estate when appropriate, verify the tax year and parcel, then view the account or print the official receipt.

8. What happened to the 2026 St. Louis County Senior Property Tax Freeze deadline?

The county extended the 2026 Senior Property Tax Freeze application and renewal deadline to July 10, 2026. That deadline has passed as of August 7, so homeowners who missed it should use the official Revenue page to watch for the next application or renewal period.

9. Can I still appeal my St. Louis County 2026 assessment?

The regular Board of Equalization filing period closed July 13, 2026. Property owners who timely appealed to the Board may generally appeal the Board decision to the Missouri State Tax Commission by September 30 or within 30 days after the Board decision, whichever is later. Narrow exceptions can apply to certain late-notice or new-owner situations.

10. Where do I get a St. Louis County deed or lien record?

Use the St. Louis County Recorder of Deeds. The office records and maintains deeds, deeds of trust, liens, releases and plats. Current deed-copy pricing is $2 for the first page, $1 for each additional page and an additional $1 when certification is requested.

Official Sources and Editorial Verification

Verification scope: St. Louis County Missouri jurisdiction, current Assessor, real-estate search route, locator-number use, property-tax inquiry fields, Missouri 19%/12%/32% real-estate assessment ratios, biennial reassessment cycle, 2026 Board deadline, post-Board State Tax Commission deadline, tax billing timing, Senior Freeze deadline, quarterly prepayment program, Recorder fees and county office contacts were reviewed for this update.

CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with St. Louis County Government, the St. Louis County Assessor, Department of Revenue, Collector of Revenue, Recorder of Deeds, Board of Equalization, Missouri State Tax Commission or any taxing district.

Assessment values, ownership records, tax levies, Senior Property Tax Freeze requirements, payment procedures, office schedules, appeal deadlines, document fees and online systems can change. Confirm time-sensitive information with the responsible official office before paying taxes, filing an appeal, changing ownership or relying on a record for a legal transaction.

Last reviewed: August 7, 2026.

Slug: st-louis-county-assessor-property-search

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County Property Search, Homestead & Tax Help Toolkit

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Your preparation checklist

Value term Simple meaning
Market value The appraiser’s estimate of the property’s value as of the assessment date.
Assessed value The value after limits or caps may be applied.
Exemptions Approved reductions such as homestead or other exemptions.
Taxable value The value used by taxing authorities after exemptions.

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