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Gaithersburg, MD Tree Protection: Heritage & Protected Trees (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Protected diameter
24 inches DBH or greater
Champion-relative threshold
75% of state champion diameter
Historic-site trees
Need historic area work permit
Reviewing bodies
Planning commission, city council, historic district commission
Variance limit
Density is not accepted hardship
DNR notice
Within 15 days of enforcement

Summary

Gaithersburg's forest conservation code makes trees 24 inches or more in diameter, or 75% the size of the state champion of their species, a priority for retention on any site under development review, alongside trees tied to a historic site or district.

Sec. 22-9. - Reforestation, afforestation, and retention requirements. ... (b) ...The following trees, shrubs, plants, and specific areas shall be considered priority for retention and protection, and they shall be left in an undisturbed condition unless the applicant can demonstrate, to the satisfaction of the planning commission or mayor and city council and historic district commission as applicable...that reasonable efforts have been made to protect them, and the development proposal cannot be reasonably altered: ...(2)Trees having a diameter measured at 4.5 feet above the ground of:a.Twenty-four (24) inches or greater; orb.Seventy-five (75) percent of the diameter...of the current state champion tree of that species as designated by the Maryland Department of Natural Resources (DNR)...(4)Trees located within a defined environmental setting that is part of a locally designated historic site, resource, or district or are designated by the state or city as a national, state, or local champion tree;a.Trees that are part of a locally designated resource shall be subject to the requirements of an historic area work permit under chapter 24, subject to review and approval of the city historic district commission.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 52 Update 1).

Full Breakdown

Section 22-9(b) does not create a citywide landmark-tree registry; instead it forces priority retention during the site plan, subdivision or sediment-control review that already triggers Chapter 22. 5 feet above ground, or 75 percent of the diameter of the current state-champion tree of its species as designated by the Maryland Department of Natural Resources, must be left undisturbed unless the applicant proves to the planning commission, mayor and city council that reasonable efforts to protect it were made and the project genuinely cannot be redesigned around it.

A separate clause protects trees inside a locally designated historic site, resource or district, or trees named a national, state or local champion: those trees trigger a historic area work permit reviewed by the city's historic district commission before any work can proceed. Section 22-12 supplies the only escape valve, a written variance request to the planning commission or city council; density or intensity of development is expressly not accepted as hardship, and a variance cannot be granted if it would confer a special privilege, was self-created, or would degrade state water quality.

Category 1 and Category 2 forest conservation easements, defined earlier in the chapter, are the tool used to permanently protect specimen trees and stands once identified, prohibiting construction, paving, grading or dumping within the easement, though diseased or hazardous specimens may still be removed after city notice and agreement.

Violations & Fines

Chapter 22 violations, including disturbance of a protected specimen or champion tree without an approved variance, are municipal infractions under Section 1-9 with a per-square-foot penalty set by city council resolution, floored at the minimum required by COMAR 08.19.03.01. Each day of noncompliance is a separate violation, the city must notify the Maryland DNR of enforcement action within 15 days, and any individually identified retained tree that does not survive construction or the two-year maintenance period must be replaced.

Frequently Asked Questions

Does Gaithersburg have a heritage or landmark tree program?
Not a standalone registry. Section 22-9(b) of the forest conservation chapter designates trees 24 inches or more in diameter, or 75% the size of the state champion of their species, as priority-for-retention whenever a site goes through development review.
What size tree counts as protected in Gaithersburg?
A tree with a diameter of 24 inches or more measured 4.5 feet above the ground, or one at least 75 percent of the diameter of the current Maryland DNR-designated state champion of that species, per Section 22-9(b)(2).
Can a protected tree ever be removed for development?
Only through a written variance under Section 22-12, and only if the applicant proves the project cannot reasonably be redesigned; wanting more density or intensity of development is explicitly not accepted as hardship.
Are trees near historic sites treated differently?
Yes. Trees inside a locally designated historic site, resource or district, or named a state or local champion, require a historic area work permit reviewed by the city's historic district commission under Section 22-9(b)(4).

Sources & Official References

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