Glossary of Words used

Estate Taxes
Inheritance and estate taxes are imposed on decedents' estates that exceed the maximum single exemption. Inheritance tax is due on the net estate as defined in Tennessee Code Annotated. Estate tax is based on the difference between the inheritance tax and the "state death tax credit" allowed on the federal estate tax return

Comparables
or comps) is a real estate appraisal term referring to properties with characteristics that are similar to a subject property whose value is being sought. This can be accomplished either by a real estate agent to establish the value of a potential client's home or property through market analysis or, by a licensed or certified appraiser or surveyor using more defined methods, when performing areal estate appraisal.

Drive-by Appraisal
Drive-by appraisals, also called summary appraisals, are exterior inspections of homes by licensed real estate appraisers. These types of appraisals typically are used for documenting comparable listings or sales used in residential real estate appraisals required by mortgage lenders. A drive-by appraisal establishes an estimated value and is used primarily for informational purposes rather than determining a property's specific appraised value.

Highest and Best
The reasonably probable and legal use of property, that is physically possible, appropriately supported, and financially feasible, and that results in the highest value.

Historical Appraisals
(retrospective appraisals) are performed when a situation requires an appraisal of property to determine Market Value where the effective date of the appraisal is a date in the past. The typical need for a retrospective appraisal arises when someone dies and a date of death valuation is required, or when someone receives a gift of property.

Outdoor Kitchen Value
If homes or comparables in your area DO NOT have outdoor kitchens and your home does,  this  amenity exceeds what a typical and would receive limited additional value. If comparables have this feature and data supports additional value then your home's value could increase.  Therefore, while I have made no specific line-item adjustment for this feature, I did consider the added appeal it provides, and this influence was considered in my final value reconciliation.

Valuation of Assets at Death
Determining Fair Market Value for Estate Taxes When someone dies, it is necessary to value all of the decedent’s assets, including real property such as real estate. As part of the valuation of assets at death by an estate tax appraiser, a date of death valuation determines the Fair Market Value of real estate as of the date that the owner died. This property valuation is used to determine if a federal estate tax return is due to the IRS, and the amount of estate tax, if one is owed. This is part of what is sometimes referred to as the death tax. The valuation of the property is also used to determine the new income tax basis for the decedent’s assets when they are passed on to the person’s heirs.

Retrospective Value
 In estate planning situations it is common for the appraiser to perform a ”retrospective appraisal”, meaning that even though the property might be inspected today, it isn’t valued off of today’s date, but instead based upon a previous date (usually the date of death of the owner of the property, hence the term “date of death” appraisal). 
The subject's rear-yard kitchen amenity exceeds what a typical built-in BBQ would add in terms of appeal to the subject. In my opinion, this added appeal is a positive influence on value. I could not find sufficient data in the market to make a credible value adjustment by means of extraction. An arbitrary adjustment would be just that; arbitrary. Therefore, while I have made no specific line-item adjustment for this feature, I did consider the added appeal it provides, and this influence was considered in my final value reconciliation.