Tree surveys, DBH and protected trees

Understand tree measurements and local preservation questions before clearing.

PlanSet Designs editorial guide · Sources checked November 3, 2026

What DBH means

DBH means diameter at breast height. In U.S. forestry practice the reference is commonly 4.5 feet above ground. Diameter and circumference are different measurements. Follow the local inventory instructions, especially for multiple trunks, slopes or irregular stems, rather than inventing a measurement convention.

Size is only part of the review

Protected, specimen, heritage and historic tree classifications depend on the local rules. Species, size, condition and location may all matter. There is no single statewide size threshold that makes every tree removable or protected. Ask the responsible arbor or planning office which inventory, retention, removal and replacement standards apply.

Design around the constraints early

Have relevant tree locations incorporated into the site-planning discussion. The proposed home, driveway, utilities and grading can all affect trees. Ask about mitigation, replacement planting and protection during work before committing to a clearing scope. A building permit should not be assumed to authorize separate tree removal.

Official sources and further reading

Use this guide to prepare questions. The permitting office and responsible professionals determine the requirements for your parcel and proposed work.

Keep planning

Find your county or city office →

Before buying a Florida homesite →

Wind criteria and Florida house plans →

Boundary surveys, elevations and site plans →

Flood zones, base flood elevation and fill →

Wetlands and protected species before clearing →

Clearing or demolishing before a new home →

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Helpful details: city or county, whether you already own the lot, your survey status and a plan or inspiration link. It’s okay if you don’t know yet.