Portland Tree Consulting Preservation Plans
Tree preservation plans are used by property owners, contractors, and others involved with land division and development. In these cases, various municipal codes regulate how many trees must be retained and how many can be removed. These codes are complex, are updated frequently, and are different in every jurisdiction. We help our clients navigate these regulations and comply with the law.
Tree preservation plans are used by property owners, contractors, and others involved with land division and development. In these cases, various municipal codes regulate how many trees must be retained and how many can be removed. These codes are complex, are updated frequently, and are different in every jurisdiction. We help our clients navigate these regulations and comply with the law.
Tree Codes Are Far-reaching
In the City of Portland, tree codes apply to anyone seeking to subdivide a property or develop it. This includes individuals, businesses, construction companies, and architects involved with the project. By develop, we mean building a structure or subdivision, apartment building, or an ADU. Each of these triggers one or more City Code requirements relating to tree protection measures during construction.
Tree Codes Are Far-reaching
In the City of Portland, tree codes apply to anyone seeking to subdivide a property or develop it. This includes individuals, businesses, construction companies, and architects involved with the project. By develop, we mean building a structure or subdivision, apartment building, or an ADU. Each of these triggers one or more City Code requirements relating to tree preservation.
Tree Codes Are
Far-reaching
In the City of Portland, tree codes apply to anyone seeking to subdivide a property or develop it. This includes individuals, businesses, construction companies, and architects involved with the project. By develop, we mean building a structure or subdivision, apartment building, or an ADU. Each of these triggers one or more City Code requirements relating to tree preservation.
Requirements Vary
In the City of Portland a land division, property boundary line adjustment or the like will require a professional arborist to develop a tree preservation plan. All trees 6" in diameter and larger must be accounted for. There are various parameters based on the number of trees that are 20" diameter and larger, and requirements regarding the total inches of tree diameter on the property.
A Demolition Permit and a Development Permit both trigger additional obligations relating to street tree density and overall tree canopy area, based on the square footage of the property. In addition to 6" trees, there are obligations based on 12" trees, 20" trees, with special requirements for trees 36" and larger.
Requirements Vary
In the City of Portland a land division, property line adjustment or the like will require a professional arborist to develop a tree preservation plan. All trees 6" in diameter and larger must be accounted for. There are various parameters based on the number of trees that are 20" diameter and larger, and requirements regarding the total inches of tree diameter on the property.
A Demolition Permit and a Development Permit both trigger additional obligations relating to street tree density and overall tree canopy area, based on the square footage of the property. In addition to 6" trees, there are obligations based on 12" trees, 20" trees, with special requirements for trees 36" and larger.
The Requirements Vary
In the City of Portland a land division, property line adjustment or the like will require a professional arborist to develop a tree preservation plan. All trees 6" in diameter and larger must be accounted for. There are various parameters based on the number of trees that are 20" diameter and larger, and requirements regarding the total inches of tree diameter on the property.
A Demolition Permit and a Development Permit both trigger additional obligations relating to street tree density and overall tree canopy area, based on the square footage of the property. In addition to 6" trees, there are obligations based on 12" trees, 20" trees, with special requirements for trees 36" and larger.
Tree Transplanting Service
As your Tree Consultants, it is our job to work with all stakeholders — architects, City Planners, builders, and owners — and find a way for you to build what you want on your property while still preserving trees and complying with the law.
We Seek Win-win Solutions
As your Tree Consultants, it is our job to work with all stakeholders — architects, City Planners, builders, and owners — and find a way for you to build what you want on your property while still preserving trees and complying with the law.
We Seek Win-win Solutions
As your Tree Consultants, it is our job to work with all stakeholders — architects, City Planners, builders, and owners — and find a way for you to build what you want on your property while still preserving trees and complying with the law.
“I have always been extremely satisfied with his work and communications, which is why he is my go-to arborist. His knowledge of trees is vast. I rely upon his knowledge and recommendations in my land use applications. I definitely recommend him and his services.”
Annemarie Skinner, Emerio Design
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Portland Tree Consulting Arborist Reports
Arborist reports are technical documents used by property owners when applying to remove trees from their land.
Arborist reports are technical documents used by property owners when applying to remove trees from their land.
Homeowners and businesses might wish to remove treesfor a variety of reasons, including:
The trees are dead, dying, or have a disease that could spread to other trees.
The tree has characteristics that make it a hazard to the public. For example, it might have weak trunks or branches or shallow root structures that can’t support the tree during a wind or ice storm.
The tree is an invasive species and removing it would benefit the local ecosystem.
The tree is interfering with plans for approved construction on the property, or is growing in such a way that it is causing harm to existing structures or property amenities.
Homeowners and businesses might wish to remove trees for a variety of reasons, including:
The trees are dead, dying, or have a disease that could spread to other trees.
The tree has characteristics that make it a hazard to the public. For example, it might have weak trunks or branches or shallow root structures that can’t support the tree during a wind or ice storm.
The tree is an invasive species and removing it would benefit the local ecosystem.
The tree is interfering with plans for approved construction on the property, or is growing in such a way that it is causing harm to existing structures or property amenities.
Homeowners and businesses might wish to remove trees for a variety of reasons, including:
The trees are dead, dying, or have a disease that could spread to other trees.
The tree has characteristics that make it a hazard to the public. For example, it might have weak trunks or branches or shallow root structures that can’t support the tree during a wind or ice storm.
The tree is an invasive species and removing it would benefit the local ecosystem.
The tree is interfering with plans for approved construction on the property, or is growing in such a way that it is causing harm to existing structures or property amenities.
Confusing and Complicated Code with Certified Arborist
Depending on the property’s location, one or more municipal codes might apply, potentially limiting a property owner’s options for tree removal. Different requirements apply to different types and ages of trees. Permit applications must be filed that thoroughly explain the need for the tree removal. Proceeding without approval is ill-advised: Often, the penalties for noncompliance are steep, and can lead to costly delays in construction and development plans.
Confusing and Complicated Codes
Depending on the property’s location, one or more municipal codes might apply, potentially limiting a property owner’s options for tree removal. Different requirements apply to different types and ages of trees. Permit applications must be filed that thoroughly explain the need for the tree removal. Proceeding without approval is ill-advised: Often, the penalties for noncompliance are steep, and can lead to costly delays in construction and development plans.
Confusing and Complicated Codes
Depending on the property’s location, one or more municipal codes might apply, potentially limiting a property owner’s options for tree removal. Different requirements apply to different types and ages of trees. Permit applications must be filed that thoroughly explain the need for the tree removal. Proceeding without approval is ill-advised: Often, the penalties for noncompliance are steep, and can lead to costly delays in construction and development plans.
Don’t risk it — go with a Consulting Arborist
Hiring an experienced Consulting Arborist to navigate tree-related issues can be crucial in obtaining approval from governing bodies. Tree-related codes change often, and every municipality is different.
To ensure success for our clients, we keep up on the latest revisions to City Codes and check on the language that the City Planners are looking for. We are familiar with Code requirements and the best approach to getting permit applications approved. This includes properly filling out forms, supplying appropriate photographs, and creating effective written narratives that explain the need for the tree removal.
Don’t risk it — go with a Consulting Arborist
Hiring an experienced Consulting Arborist to navigate tree-related issues can be crucial in obtaining approval from governing bodies. Tree-related codes change often, and every municipality is different.
To ensure success for our clients, we keep up on the latest revisions to City Codes and check on the language that the City Planners are looking for. We are familiar with Code requirements and the best approach to getting permit applications approved. This includes properly filling out forms, supplying appropriate photographs, and creating effective written narratives that explain the need for the tree removal.
Don’t risk it — go with a Consulting Arborist
Hiring an experienced Consulting Arborist to navigate tree-related issues can be crucial in obtaining approval from governing bodies. Tree-related codes change often, and every municipality is different.
To ensure success for our clients, we keep up on the latest revisions to City Codes and check on the language that the City Planners are looking for. We are familiar with Code requirements and the best approach to getting permit applications approved. This includes properly filling out forms, supplying appropriate photographs, and creating effective written narratives that explain the need for the tree removal.
“Peter and his team are responsive and very knowledgeable about different jurisdictional requirements on tree preservation and removal.
They provide great feedback on tree conditions and are realistic on what can be retained on a site with construction. I highly recommend Peter for any arborist report type needs. He is friendly and great to work with."
Danelle Isenhart, Isenhart Consulting
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Portland Tree Consulting FAQ
A: This depends upon the size, species and condition of the tree, its location, and your municipality.
A: For the City of Portland, visit
For the City of Lake Oswego, visit
For the City of Tigard, visit
A: We are generally able to quote an estimate for consulting services over email or phone.
A: We need to know your municipality and what your plans are. In the City of Portland, for example, a land division requires a Chapter 33.630 report. A lot confirmation and a construction permit require a Chapter 11.50 report. This will be modified for construction under $147,500, for demolition only, and for lots less than 5,000 sq. ft. In addition, the number of trees on the property is critical.
A: We provide consulting services throughout Multnomah, Clackamas, and Washington Counties.
A: If you have a history with a trusted, educated, and experienced arborist, keep up the good work. But keep in mind that many estimators are sales people on commission. A paid, independent consultant has no ulterior motive.
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About Portland Tree Consulting
Professional Tree Service
Overview - Tree Care
Portland Tree Consulting offers expertise in many aspects of tree consulting. We write arborist reports for homeowners, prepare tree preservation plans for developers, and provide other consulting services throughout Multnomah, Clackamas, and Washington Counties.
We help homeowners identify problem trees and develop long-range landscape plans.
We help builders and developers comply with City Codes relating to tree preservation, tree density, and tree removal. This affects how they can subdivide or develop their land. City Codes also come into play when removing diseased or nuisance trees, and when demolishing buildings or building new ones.
We help property owners find ways to develop their land while preserving the trees they want to save and meeting all applicable tree codes.
Overview
Portland Tree Consulting offers expertise in many aspects of tree consulting. We write arborist reports for homeowners, prepare tree preservation plans for developers, and provide other consulting services throughout Multnomah, Clackamas, and Washington Counties.
We help homeowners identify problem trees and develop long range landscape plans.
We help builders and developers comply with City Codes relating to tree preservation, tree density, and tree removal. This affects how they can subdivide or develop their land. City Codes also come into play when removing diseased or nuisance trees, and when demolishing buildings or building new ones.
We help property owners find ways to develop their land while preserving the trees they want to save and meeting all applicable tree codes.

Peter Torres
Peter Torres is the President, Master Arborist and Chief Consultant at Portland Tree Consulting. Peter became a Massachusetts Certified Arborist in 1979. After arriving in Oregon he recognized the need for managing the remnant forest in the urban areas. To that end, he attended Oregon State University, earning a Master of Forestry degree in 1997. His field of study was forest biology, with a specialization in root disease of native conifers.

Peter Torres (Tree Specialist)
Peter Torres is the President, Master Arborist and Chief Consultant at Portland Tree Consulting. Peter became a Massachusetts Certified Arborist in 1979. After arriving in Oregon he recognized the need for managing the remnant forest in the urban areas. To that end, he attended Oregon State University, earning a Master of Forestry degree in 1997. His field of study was forest biology, with a specialization in root disease of native conifers.

Peter Torres
Peter Torres is the President, Master Arborist and Chief Consultant at Portland Tree Consulting. Peter became a Massachusetts Certified Arborist in 1979. After arriving in Oregon he recognized the need for managing the remnant forest in the urban areas. To that end, he attended Oregon State University, earning a Master of Forestry degree in 1997. His field of study was forest biology, with a specialization in root disease of native conifers.
Our Achievements as Portland Tree Protector

International Society of Arboriculture:
Board Certified Master Arborist PN-0650B

TRAQ: Tree Risk Assessor Qualified

Master of Forestry, Oregon State University

International Society of Arboriculture:
Board Certified Master Arborist PN-0650B

TRAQ: Tree Risk Assessor Qualified

Master of Forestry, Oregon State University

International Society of Arboriculture: Board Certified Master Arborist PN-0650B

TRAQ: Tree Risk Assessor Qualified

Master of Forestry, Oregon State University
"Peter was always very responsive to my requests and meeting the needs of the clients while also meeting the technical requirements of the City. His reports were always clear and concise, and we never had any negative responses from the City.”
Joe H. Ferguson, Ferguson Land Surveying, Inc.
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At Portland Tree Consulting, we know how complicated it can get when removing trees from your property. Whether it’s taking out a dead or hazardous tree threatening your home, or analyzing a stand of conifers for a new subdivision, the process of meeting regulatory requirements can be onerous. We guide you through it in Portland, Multnomah County, ensuring City and other municipal codes are met.
At Portland Tree Consulting, we know how complicated it can get when removing trees from your property. Whether it’s taking out a dead or hazardous tree threatening your home, or analyzing a stand of conifers for a new subdivision, the process of meeting regulatory requirements can be onerous. We guide you through it, ensuring City and other municipal codes are met.
We Focus On Two Core Services
We Focus On Two Core Services
Tree Preservation Plans
Developing tree removal and preservation plans for developers and owners of large land tracts.
Arborist Reports
Preparing arborist reports for small-scale property owners looking to remove trees from their land.
Tree Preservation Plans
Developing tree removal and preservation plans for developers
and owners of large land tracts.
Arborist Reports
Preparing arborist reports for small-scale property owners
looking to remove trees from their land.