Tree Service | Arborist Reports
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Required Submittal
Site Plan – The site (grading and development) plan shall accurately indicate the location,
species, tree dripline, and trunk circumference of all trees, with a trunk circumference of 20
inches (50cm) or more, measured 4 ½ feet (1.37m) above the ground (or any significant
grouping of trees including groves of four or more trees regardless of trunk size) whose tree
trunks lie within 50 feet (15.2m) of proposed grading or other proposed improvements, or
other proposed development activity (e.g., stockpiling of construction materials, fill, etc.). The
site plan shall include any qualifying trees whose trucks lie on adjoining property but whose
canopy (dripline) extends onto the subject property. If the proposed development is in
proximity to two or more qualifying trees, then each tree shall be assigned a number for
identification purposes (e.g., #3, #5, etc.). (Trees whose trunks are not within 50 feet of
proposed ground disturbance need be only denoted by the outline of the aggregate tree canopy
on the site plan.) The site plan shall also specifically and clearly indicate whether
individual trees are proposed to be (1) removed, (2) altered1
or otherwise affected.2
If mature trees are not shown on the site plan as proposed to be removed or altered, the
County may assume that those trees are intended to be preserved without alteration, and a
County development permit may be so conditioned. Applicants should be aware that a
subsequent ministerial permit (grading or building permits, or approval of improvement
plans) by the County cannot be cleared unless it is consistent with the Tree Ordinance and
any applicable Development or Tree Permit.
The plan shall contain a tally of the total number of trees proposed to be removed and their
respective tree circumferences.
Drainage Plan and Underground Utilities – The site plan shall also provide for a
preliminary drainage plan that identifies the location of any proposed drainage ditches,
underground drainage culverts, and similar facilities; and disclose the location of any
proposed underground utilities (telephone, cable TV, sewer, electric, gas and water lines;
and septic tank and leachfield).
Previously Designated Heritage Tree(s) – If the Board of Supervisors has previously
designated one or more trees on the site or an adjoining site as a Heritage Tree(s), then
those trees shall be so labeled on the site plan. The site plan shall clearly indicate
whether proposed development will encroach within the drip line or a 12 foot (3.66m)
radius of the tree trunk whichever is greater.

An alteration to a protected tree involves any proposed trenching, grading, filling, paving, compaction,
stockpiling, or change in ground elevation within the dripline of a tree. It also includes any proposed “trim
by topping” of a protected tree, that is, the removal of the upper 25% or more of a tree’s trunk)s) or primary
Though not required, an applicant may also choose to identify on the site plan a third classification of
trees- (3) trees to be preserved (without alteration). However, any tree designated on an approved site plan
for preservation, or so designated by condition of approval, automatically becomes a “protected” tree under
the ordinance. No removal or (unauthorized) alteration of a protected tree is allowed without first obtaining
a Tree Permit from the County.
No Qualifying Trees on Site – If the site contains no trees with a trunk circumference of
20 inches (50 cm) or more 4 ½ feet (1.37m) above the ground, then the site plan should
stipulate that:
“No trees with a trunk circumference of 20 inches or more are located on the site.”
Other Required Project Description Information
• Written statement indicating:
– description of any tree that is proposed to be altered by “trim by topping”, that is, the
removal of the upper 25% or more of a tree’s trunk or primary leader, and the extent
of the proposed trimming:
– the reasons(s) for alteration or removal of existing trees;
– the proposed method of tree alteration or removal: and
– information indicating the effect of tree alteration or removal on soil stability and
erosion if located on a steep slope or near any creek.
• Photographs of the tree(s) to be proposed to be affected.
Arborist Report – Submittal of an arborist report on the proposed development may be
required by County staff if (1) the reasons for alteration or removal relate to the health of the
tree; or (2) if grading, trenching or filling is proposed under the dripline of an existing tree,; or
(3) the review is of a collective tree permit and (County staff) determines that more technical
expertise is necessary to make the decision. The arborist report must follow the guidelines
listed below:
The report shall be prepared by a person who is either (1) certified by the Western
Chapter of the International Society of Arboriculture, as an expert on the care of woody
trees, shrubs and vines in the landscape, (2) a consulting arborist who satisfies the
requirements of the American Society of Consulting Arborists, or (3) such other arborist
who, after review by the Director of Community Development, is determined to meet the
standards established for certified or consulting arborists hereinabove described. The
report (or cover letter from the arborist) shall indicate how the individual meets these
Minimally, the report shall provide:
• an appraisal of the existing health of the trees near proposed development;
• an evaluation of whether trees proposed to be preserved (“altered”) in proximity to
proposed development can be preserved;
• the restorative or other remedial measures necessary to assure their preservation.
The report shall indicate if the proposed measures will be sufficient to avoid
significant impact on the preservation and long-term survival of the tree(s);
The report should also indicate that:
• the arborist has reviewed the Tree Protection and Preservation Ordinance; and
• the report has incorporated into its review the factors which the County is required to
consider prior to approval or denial of the removal or alteration of protected trees
Submit two copies of the arborist report to the County.
(Ref. Chapter 816-6 of the Zoning Code, Tree Protection and Preservation; Particular
reference to §816-6.1004; Chapter 816-4, Heritage Tree Preservation; and Policy 8-6 of the
Conservation Element of the General Plan, pg. 8-26; Ordinance became effective on
November 3,1994)

Application Form
Obtain and fill out an Application Form from the Application and Permit Center, 651 Pine
Street, Martinez. The form must be signed by the property owner.
Important Notice to Applicants
The applicant must review and sign the 2-page form entitled “Important Notice to
Applicants.” The signed document must be included in the application submittal.
Filing Fee
Fees for a Alteration or Removal of a Protected Tree(s) (Chapter 816-6)
1. Initial fee $500, plus $50 per tree for each impacted tree
over the first six impacted trees up to a
maximum of $550.
2. If public hearing is required Time and materials, initial fee deposit of $550.
Plus $1000.
Fees for Alteration or Removal of a Heritage Tree(s) (Chapter 816-4)4
3. Removal of a Heritage Tree Application Review: Time & materials; initial
fee deposit of $1000.
4. Alteration of a Heritage Tree Inspection Review: Time & materials; initial
fee deposit of $500.
Should you have any questions, please call the Application and Permit Center at (925) 335-

The tentative decisions on “over-the-counter” tree permit applications are subject to legal notice
requirements and appeal opportunity.
Heritage trees are trees expressly designated by the Board of Supervisors pursuant to Chapter 816-4 of the
Ordinance Code and are not to be confused with “protected” trees as defined in Chapter 816-6 of the
Ordinance Code which provides legal protection to trees on properties meeting certain criteria.

Free estimate call (510) 734-7123
CA Lic #794981 Bonded & Insured