Leonard Sullivan-Oklahoma County Assessor, 320 Robert S. Kerr #313, Oklahoma City, OK 73102
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Oklahoma County Assessor
Terms and Definitions


Ad Valorem Taxation - according to the value of the property.

Additional Homestead Exemption - If you are head of household and qualify for homestead exemption, you may also qualify for additional homestead. You may receive an additional $1,000 assessment exemption if the gross household income from all sources did not exceed $20,000 for the past calendar year.  You may file for additional homestead between January 1 and March 15. There is a simple form on income that you will fill out as part of your application. If you are 65 or older as of March 15 of the filing period and presently qualify for additional homestead, you will not have to renew the additional homestead annually. However, it will be the responsibility of the taxpayer to notify the Assessor’s office if your income exceeds $20,000. 

Annual Abstract - a summary of assessed valuations on all taxable property within the county.  Completed no later than June 15th or first working day thereafter.

Arbitrary Assessment - an assessment from the best information available in the absence of a return by the taxpayer. An arbitrary assessment must be protested within ten days of the date of the notice.

Assessed Value - the taxable value of real or personal property either of individual items of personal property or parcels of real property or the aggregate total of such individual taxable items or parcels within a jurisdiction.

Assessment Ratio - the assessment percentage applied to the market value of the property.   Real property's assessment ratio is 11% and personal property is 14% of market value.  (S.Q. 675 provides that the assessment ratio  for REAL Property will not increase unless approved by a majority of the voters.)

Assessment Roll - a computerized or non-computerized record required by law to be kept by the county assessor and containing information about property within a taxing jurisdiction.

Assessment Year - the year beginning January 1 of each calendar year and ending on December 31 preceding the following January 1 assessment date.

Book Value - the original cost of the asset as carried in books of account less depreciation.

Coefficient of Dispersion (C.O.D.) - a statistical measure of assessment uniformity for a category of property or for all property within a taxing jurisdiction.

Cost - the total dollar expenditure for labor, materials, legal services, architectural design, financing, taxes during construction, interest, contractor's overhead and profit and entrepreneurial overhead and profit.

County Board of Equalization - the board which, upon hearing competent evidence, has the authority to correct and adjust the assessment rolls in its respective county to conform to fair cash value.

Documents - Sales and Non-sale documents or deeds:

Deed Type/Code Description
11 Veteran's exemption for farm
12 Double veteran's exemption for farm
13 Non Sale Document - Retain cap and exemptions (Typically Divorce Decrees and Correction Deeds)  
16 Non Sale Document - Retain cap and remove exemptions (Family transactions and Probated Estates)
3202 Non sale document from trust or individual to LLC (Limited use)  
DE Sale Document - Remove cap and exemptions (Sale with Documentary Stamps between non family members)
DEMP Multiple parcel sale document- Remove cap and exemptions (Sale document representing more than one account number)    
HIST DOC Historical Document no longer used for assessment purposes (All types of documents)
MHHS Manufactured Home Homestead
MHR Manufactured Home Repossession
MHS Manufactured Home Sale
MHT Manufactured Home Title
MHT42 Manufactured Home Title 42
OT Non Sale Document - Remove cap and exemptions (Transactions between non family members that lack Documentary Stamps)

 Equalization - the process for making adjustments to taxable property values within a county by analyzing the relationships between assessed values and fair cash values in one or more use categories within the county or between counties by analyzing the relationship between assessed value and fair cash value in each county.

Fair Cash Value - the value or price at which a willing buyer would purchase property and a willing seller would sell property if both parties are knowledgeable about the property and its uses and if neither party is under any undue pressure to buy or sell and for real property shall mean the value for the highest and best use for which such property was actually used, or was previously classified for use.

Fire Protection District - Two districts (Hickory Hills & Deer Creek) were established by a petition of (25%) of title holders of the land, and approved by (3/5ths) of the qualified voters within the district.  The Hickory Hills fire districts is allowed to levy an assessment of (7.53) mills (or $7.53 per 1000) on the dollar of assessed value of all the advalorem taxed property (Real, Personal, & Public Service) of the district.  The Deer Creek fire district has a levy of 7.30 mills or $7.30 per 1000 assessed.  For more information about fire districts including maps click here.

Homestead Exemption - the reduction in the taxable value of a homestead as authorized by law.

Increase Limitation - limits increasing of fair cash value on real property for tax purposes by not more than 5% in any taxable year unless improvements have been made to the property or if title to the property has been transferred, changed or conveyed to another person.

Market Price - is the amount actually paid or about to be paid in a particular transaction.

Market Value - is an estimated sale price that would result from careful consideration of all information by a prudent, responsible buyer and seller under conditions of a fair sale (an arm's length sale).

Mill - is one-thousandth of a dollar. For convenience in Oklahoma, a tax rate (the sum of all mills levied) is expressed as dollars per thousand dollars of assessed value. A Tax rate of 80 mills, for example, would be 80 tax dollars.

Neighborhood - The environment of a subject property that has a direct and immediate effect on value.

Notice Value/Date - This refers the assessment notice that is mailed to a property owner concerning changes in the assessed value of the property.  It contains information such as the Market and Assessed values as well as the date it was mailed.  If property owners disagree with this change they must request an informal hearing with the Assessor's Office within the specified time frame regarding any change.

Parcel - a contiguous area of land described in a single description by a deed or other instrument or as one of a number of lots on a plat or plan, separately owned and capable of being separately conveyed.

Penalty - if any personal property is not listed by the person whose duty it is to list such property on or before March 15 on any year, when such property is assessed there shall be added to the assessed valuation of such property as a mandatory penalty, amounts as follows:  1) If listed or assessed after March 15, but on or before April 15, ten percent (10%) of the assessed value.  2) If listed or assessed after April 15, twenty percent (20%) of the assessed value.  If the county assessor fails, neglects, or refuses to add the valuation penalty, he shall be liable on his official bond for the amount of said penalties.

Property Status - The actual taxable status of the property.

  • Capped - taxable value of the property is limited to increasing of fair cash value on real property for tax purposes by not more than 5% in any taxable year unless improvements have been made to the property or if title to the property has been transferred, changed or conveyed to another person.
  • Market - taxable value is the estimated sale price that would result from careful consideration of all information by a prudent, responsible buyer and seller under conditions of a fair sale (an arm's length sale).
  • Frozen - taxable value of the property is frozen at the current taxable value due to the owner being 65 or older and meeting the income limitations.

Revaluation - The Oklahoma Legislature established the revaluation program in 1969 (See O.S. 60 Statute 1481.1).   This program was designed to be a revaluation of all taxable property.  The County Assessor was given the task of maintaining an active and systematic program to be sure that all county property be appraised routinely in accordance with an approved schedule.

Senior Valuation Freeze - provides for those who apply and qualify, the taxable market value will not increase on a homestead property owned by a person 65 years of age or older before January 1 and whose gross household income does not exceed $53,900 for the previous year unless the individual ceases to own or occupy the property, the income exceeds the limit, or if improvements have been made to the property.  (S.Q. 677)

Situs - where the property is physically located.

Sketch File Abbreviations - listed below are the abbreviations used with the sketch drawing to identify the property.

  • CPY = Canopy (Commercial)

  • CT = Covered Patio

  • Gable = Carport attached to main within the same roof line

  • GBA = Gross Business Area (Commercial)

  • GLA = Gross Living Area (Residential)

  • NCA/NAV = Non Calculated Area (No Value Imps)

  • Open Slab = Patio attached to main

  • XC = added carport could be close to the main but doesn’t share roof with the main

  • Utility Wood = Utility Rooms attached to main

  • Wood Roof = Porch attached to main (GLA) within the same roof line

  • Wood = Storage attached to main

Tax Roll - a listing of all taxable property in the county for a given year.  Must be completed on or before of October 1st.

Taxable Market Value - The market value to be used in computing the gross assessed value for this years taxes.  (Note:  Due to Constitutional Amendments (S.Q. 676) this value will not exceed a 5% increase over the previous year value unless improvements were made to the property, if title to the property is transferred, changed, or conveyed to another person, or if status for the senior valuation freeze has changed.)  More information available here.

Visual Inspection - Beginning January 1, 1991, each County Assessor is required to maintain an active and systematic program of visual inspection.  The County Assessor is further required to establish an inspection schedule which will result in the visual inspection of all taxable real property at least once each 4 years.  A copy of this 4-year visual inspection plan is also to be submitted to the Oklahoma Tax Commission for approval.  In addition to the 4-year inspection cycle, the Assessor must annually review the values of all county property.  The values of each classification of property (Residential, Commercial/Industrial and Agricultural) must reflect the market as of January 1 of that year.

 
 

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