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ISA-Certified Arborist Reports for Tree Removal Permits and Development Applications

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Michael Waller of Arbor Vision in front of a tree equipment

Arborist reports have been increasingly common over the last 20 years for the maintenance and management of forested urban locations. Sometimes arborist reports are sought as preparation for tree removal, and sometimes they are done for informational purposes. Whether you need such a report for regulatory compliance, general safety reasons, or informational purposes, it is essential to work with an ISA-Certified arborist with the training and experience to provide a quality report.

What is an Arborist Report?

An arborist tree report can tell you precisely what trees are on a given site, their condition, the impact of invasive species, disease considerations, and more. In cases where local ordinances protect trees, your report will detail which trees are legally protected, their proportions, and other relevant facts construction planners need to consider. An arborist report can describe any protected trees that must be worked around during construction or development projects.

Native trees above a specific size are usually protected. The protected tree, bushes, or other flora will be described in terms of the scope of their root system, the size of the canopy, and other considerations that developers must plan around. Any
long-term project or process involving trees calls for an arborist report. Failure to obtain a professional report of this kind can damage the local wildlife and the environment and result in fines and other penalties.

The purpose of an arborist report is to ascertain and document the condition of a tree or trees. The report explains the condition of the area, threats related to disease or pests, physical injury to a tree or trees, and the proportions of the roots, body, and canopy.


Remedial steps may be recommended for any relevant conditions. These may include:

  • Injections to improve the vigor of a tree
  • Fertilization for soil health
  • Pest control
  • Pruning or removal
  • Air spading

Some municipalities require an arborist report before issuing a tree removal permit. These reports are frequently subject to local by-laws.

The Department of Forestry and city websites can provide information regarding whether an arborist report is needed in a specific part of a community. Ordinances protecting specific trees can vary from one city to the next. An excellent place to start is your city government website and information hotline for information regarding a specific project.

arborist assessing a tree for an arborist report

When is an Arborist Report Needed?

Arborist reports can provide important information about the condition and health of a tree, a set of trees, and the area in which specific trees are located.

These reports can describe and explain those trees' health problems, what has caused an infection, disease, infestation, or physical injury to a tree, and what should be done to remediate it.

An arborist report can assess physical injuries to a tree that make pruning, trimming, or removal dangerous. Trees that should be removed due to the hazard of falling timber can be identified. Trees that can be trimmed but bear potentially dangerous damage can be marked accordingly. Tree care specialists can plan for the safe removal of a limb, limbs, or an entire tree in such a way as to prevent and eliminate hazardous conditions.

Further, an arborist report can delineate problems with invasive species of insects that can damage trees or may have compromised a large tree's structural integrity. Soil can be assessed for health, stability, and other conditions affecting the tree or trees.

Another critical aspect of an arborist report is assessing the potential loss a community would suffer after removing a given tree. Large trees significant to local parks and recreation assets may be deemed essential or historical in value and significance. Arborist reports are a critical resource for neighborhood development services and city foresters. These professionals rely on arborist reports to decide which trees can and should be safely removed without causing an unacceptable loss to the community.

arbor vision member facing away from the camera, inspecting tree

Why an ISA-Certified Arborist Report?

An arborist report provided by an International Society of Arboriculture certified expert ensures your report is done by a professional meeting or surpassing industry standards for experience, knowledge, and a code of ethics.

Getting an ISA-Certified report will give you a complete assessment of the condition and health of a given tree or tree, as well as the site and the tree canopy conditions.

Do You Need an Arborist Report?

If you are planning to remove a tree or a property development project in San Ramon, Alameda County, Contra Costa County, San Jose, Milpitas, and the surrounding area, there's no need to risk damaging protected trees. An arborist report provides you with the information you need to manage your trees properly.

Call for a free quote to get started.

CALL 925-409-2979

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