by Michael_Oakes on Fri Aug 14, 2009 8:32 am
Mathew,
First of all, using a percentage of fee to measure the value of the easement footprint is generally referred to as "Value of the Part Taken". The percentage to apply is dependent on the extent of rights taken. For instance, an underground sewer pipe easement is generally low impact (after construction) while an open drain over the surface is high impact. Thus, the type of easement and its affect on the real estate help determine what percentage of fee is applicable. But this method generally always assumes no diminution of value occurs to the unemcumbered remainder of the larger parcel. One quick reference I can suggest is an article written by Donald Sherwood, SR/WA, in the May/June 2006 Right of Way magazine which provides a matrix listing different percentage rangese for various types of easements. However, you should ground yourself with local knowledge. Another important factor may be local norms. If many agencies are paying within a relatively standard range, then you should consider that. I don't believe you should use a sliding scale based on proximity.
Regarding proximity, if proximity results in an "eyesore" to the property, you need to perform a "Before and After" appraisal which values the larger parent parcel before the easement and after the easement. This is done in one report. It is generally the recommended method in easement valuation even when no damage results to the remainder. (Because, how do you know unless you measure it?) To measure the impact to larger parcel, you should perform an impact study or reference studies already performed which address this type of easement. Be mindful when valuing a parcel in the before state, it may be subject to existing easements. If so, consider whether they impact the before value. Also, your comparable sales may also be likewise affected by easements. Study them carefully.
It appears you have limited experience in right of valuation. If possible, seek a mentor in your area who can you can bounce ideas off. (Perhaps, over lunch on you). Also, IRWA Course 401 The Appraisal of Partial Acquisitions is an excellent course which I highly recommend. In the meantime, research past articles on this topic in Right of Way Magazine.
Good luck,
Michael Oakes