Construction

Tree Removal for New Construction: Permits and Protection Requirements

Updated 2025

Quick Answer

Tree removal for new construction follows different — and usually more complex — permit requirements than residential removal of a single tree. You may need a site plan showing tree preservation, a tree survey, protection fencing around preserved trees during construction, and separate tree removal permits even within an approved building permit area.

Why Construction Tree Removal Is Different

When you're building a structure (house, addition, pool, driveway, detached garage), tree removal isn't an isolated event — it's part of a construction project that's already subject to building permit review. Cities typically integrate tree review into the construction permitting process, which means:

The site plan submitted with your building permit must identify all trees above the protection threshold
Trees that can be preserved must be marked for preservation on the plan
Trees approved for removal as part of the construction footprint are authorized differently than "standalone" removals
Trees outside the footprint that are still damaged or removed without authorization are violations

The Critical Root Zone (CRZ) — The #1 Construction Violation

The Critical Root Zone is the most important concept for construction near trees. The CRZ is the area around a tree's trunk that contains most of its critical absorbing roots — typically calculated as a 1-foot radius per inch of trunk diameter.

A 24" DBH tree has a 24-foot radius CRZ. Any of the following within the CRZ requires specific tree protection authorization:

Grading or soil disturbance
Foundation excavation
Utility trenching (electric, water, sewer, gas)
Paving, concrete, or compacted gravel installation
Parking of construction equipment
Storage of materials

CRZ violations are the most common construction tree violation — and they're often discovered after the fact when the preserved tree begins dying 1–3 years after construction. By then, the violation is hard to undo and the city still requires resolution.

Tree Protection Fencing Requirements

Cities with tree preservation ordinances typically require orange safety fencing (or equivalent) to be installed around all trees designated for preservation before any grading, demolition, or construction begins. The fence must:

Be installed at the outer edge of the CRZ (not just around the trunk)
Remain in place throughout all phases of construction
Not be moved or removed without city arborist approval

Inspectors will verify tree protection fencing is in place before approving construction to proceed past the foundation stage in many cities. Missing fencing is an immediate stop-work item.

Pre-Construction Tree Survey

For significant construction projects (new homes, major additions, commercial development), most cities require a pre-construction tree survey as part of the site development plan submittal. The survey must be conducted by an ISA-certified arborist and includes:

Location of all trees above the permit threshold on the property
Species, DBH, and health rating for each tree
CRZ calculations
Recommendation for preservation, removal, or mitigation for each tree

Removing Trees Before Getting a Building Permit

Some homeowners consider removing trees before submitting for a building permit to avoid tree preservation requirements during construction review. This is specifically prohibited in most cities — cities regularly check permit history and aerial imagery to identify trees removed in the months before a building permit application. Removing trees to circumvent construction tree preservation requirements is treated as deliberate violation and may result in denial of the building permit in addition to tree violation penalties.

Frequently Asked Questions

The pool permit application should include a site plan showing the oak's location and its relationship to the pool footprint. If the oak is within the construction area, the tree removal may be authorized as part of the pool permit review — or you may need to file a separate tree removal permit simultaneously. The city arborist will review whether the removal is truly necessary given the pool's placement, and may require alternative pool layout consideration if the oak is a heritage tree. Start with a pre-application consultation with Development Services before finalizing pool plans.

Utility trenching within a CRZ requires specific authorization from the city's arborist in most jurisdictions. The arborist may specify that trenching use directional boring (tunneling under roots) rather than open trenching, that an arborist be present during the work to evaluate and prune any exposed roots, and that specific post-trench treatments (aeration, mulching, watering) be applied. This can add cost and time to utility work but is far less expensive than a tree removal violation.

Disclaimer: Construction tree removal requirements vary significantly by city. This is general guidance. Consult your city's Development Services and a certified arborist before beginning any construction project involving trees.