Get your tree related questions answered by our knowledgable members!

Post a question or a topic for discussion in the forum below

Tree Values

I have been in the business of trees for over 40 years.  I always get asked to put a value on damaged trees.  Mainly for insurance purposes.  I can give a replacement value-that isn't the problem.  You can't replace a 12" caliber tree.  The actual value of that tree is worth alot more than what you can replace it for.  Back in 1980 the University of MN put out a publication called Shade Tree Evaluation.  I haven't seen anything like it since.  So my question is:  What do other estimators do to come up with a fair value to a damage tree?

You need to be a member of American Grove to add comments!

Join American Grove

Email me when people reply –

Replies

  • I agree with Tom Knowles.   The ISA guide "Guide for plant appraisal" is the standard.   It can be referenced if your appraisal is challenged in court or arbitration.   The "field report guide for trunk formula and replacement cost methods" and the "trunk formula method worksheet" are inexpensive associated tools to the book and provide a professional data collection system to further re-enforce your assessment.  

    http://www.isa-arbor.com/store/product.aspx?ProductID=27

    You will need to work with regional or local forestry, extension offices, or universities to see if their is a published species rating analysis for the area.   With these three items, combined with your years of experience in the industry, you can provide an equitable value for the tree that is backed by the industry.  I don't know where you are at...but if you are in MN, the species rating document which is associated with the appraisal method for MN is here:

    www.msa-live.org/docs/mn_plant_appraisal_supplement.doc
     

    The "Guide for Plant Appraisal" is sponsored by the American Nursery and Landscape Association, the American Society of Consulting Arborists, the American Society of Landscape Architects, the Associated Landscape Contractors of America, The Association of Consulting Foresters of America, the International Society of Arboriculture and the National Arborist Association.

    Jarod

  • ISA with the Council of Tree and Landscape Appraisers has published this guide for appraising trees and plants.

    http://www.isa-arbor.com/store/product.aspx?ProductID=93

     

    Tom

  • Although this may not directly answer your question, municipal development ordinances often dictate the replacement of 2 or 3 trees for every mature tree removed. While this still likely causes at least a temporary reduction in available ecosystem services, it at least provides some scope of importance within this question.

    PG

  • Thank you Kasey,

     

    This was very helpful.  Paul Beck
     
    Kasey Krouse said:

    Need to determine price per inch based on largest size tree available, get several quotes. Then need to extrapolate that value based upon the size of your tree in question. Depending on the specifics, replacement value may not be the best method. May look into Trunk formula.
    Http://www.ag-econ.ncsu.edu/faculty/vanderhoeven/TREELOSS.PDF
  • Need to determine price per inch based on largest size tree available, get several quotes. Then need to extrapolate that value based upon the size of your tree in question. Depending on the specifics, replacement value may not be the best method. May look into Trunk formula.
    Http://www.ag-econ.ncsu.edu/faculty/vanderhoeven/TREELOSS.PDF
  • Thank you for the information Neil,  This is very similar to the University of MN formula for Shade Tree Evaluation publication that I mentioned before. In their publication in 1980 they put a value on the tree by calculating the sq in of a cross section of the trunk at DBH.  The value for each sq. in . at that time was $20 / sq. in.  I'm sure the number has climbed in the last 33 years.  Do you or anyone else have an opinion on what the value should be today?

  • Have you heard of http://www.cavattreevalue.com/  Check it out and let me know what you think.  They use this in England.

This reply was deleted.