Tree Clearing and Forest Conservation Rules for Data Center Sites

A data center campus needs large, flat, contiguous pads, which on wooded land means clearing most of the trees across the building and yard footprint. Prince William County watershed staff, commenting on a proposed data center corridor in Virginia, wrote that existing data center development showed that extensive mass grading and the nearly wholesale clearing and flattening of large parcels is the norm.¹¹ That scale is why forest rules that barely touch a subdivision can reshape a campus.

The rules come from different authorities and run on different clocks. A state forest conservation law affects how much forest must be retained or replaced, and therefore the buildable acreage. Local ordinances and rezoning conditions affect what may be cut and when a permit issues. Federal wildlife law affects the season in which trees can lawfully come down where listed species may roost. A site can clear all three, or it can lose months to one of them.

Forest cover also shapes local politics. Fairfax County’s Tree Commission told county officials in 2024 that data centers often place far greater stress on environmental factors than other commercial or residential uses because of their size, and recommended ending by-right zoning for them.¹² Expect tree loss to come up in community engagement and at rezoning hearings.

Maryland’s Forest Conservation Act is the most developed state framework a data center developer is likely to meet. The Maryland Department of Natural Resources describes its purpose as minimizing the loss of forest during land development by making the identification and protection of forests and other sensitive areas part of site planning.¹ It applies to any activity requiring an application for a subdivision, grading permit or sediment control permit on an area of 40,000 square feet or more, and DNR’s 2026 model ordinance defines a development project the same way.¹⁴

Two documents drive compliance. The forest stand delineation maps existing forest stands, specimen trees and sensitive areas. The forest conservation plan then shows how the project retains forest and handles priority areas such as nontidal floodplains, streams and their buffers, steep slopes and critical habitat.¹ Clearing, afforestation and reforestation thresholds depend on the net tract area, the land use category, existing forest cover and the area proposed for clearing.¹

The Act is administered by DNR’s Forest Service but implemented locally: counties and municipalities with their own programs review plans, and DNR reviews them where no local agency does.¹ That local layer matters because local programs can go further than the state minimum, which is why two Maryland sites with the same forest cover can carry different obligations.

In 2023, the General Assembly passed HB 723, “Natural Resources – Forest Preservation and Retention.” According to the legislature’s fiscal note, it replaced the no-net-loss outcome in the state’s forest policy with measured increases in forest and tree canopy acreage, while letting local jurisdictions propose alternative measures that still achieve no net loss within their borders.⁵ Most provisions took effect July 1, 2024. The law added restrictions on forest clearing, raised the reforestation required when forest is cleared, and grandfathered certain plans approved before July 1, 2024.⁵

Counties supported the forest goals but asked for flexible, implementable rules, a reminder that much of the burden falls on local review staff.¹³ Local programs also change on their own schedule. Montgomery County adopted amendments effective April 3, 2023 that raised forest conservation and afforestation thresholds for several zoning categories, and grandfathered projects only if a preliminary or final forest conservation plan had been submitted before that date.⁶

• Confirm which program reviews the site: county, municipality or DNR.¹
• Check whether a plan already approved for the parcel is grandfathered under the 2023 law or a local amendment.⁵⁶
• Ask how the program treats priority areas such as floodplains, stream buffers and steep slopes, which often overlap with land the project wanted for stormwater or roads.¹

These details belong in the due diligence period. A forest conservation plan affects grading, stormwater management and the site plan, so a late surprise can force a redesign. For Maryland context beyond forests, see our Maryland site selection guide.

Outside Maryland, tree rules usually come from local zoning and land development codes rather than a statewide act. They take several forms: canopy retention or replacement requirements, specimen tree protection, buffer and landscaping standards, limits on commercial timbering in certain zones, and conditions attached to a rezoning. In Virginia, those conditions are often proffers that run with the land.

A 2025 dispute in Stafford County, Virginia shows how these local tools work. The county sued and obtained an emergency order halting timbering on land tied to a proposed 1,042-acre data center campus, alleging that the clearing violated A-2 Rural Residential zoning, where commercial tree cutting is prohibited, and a proffer meant to preserve trees unless their removal is essential.³ The state Department of Wildlife Resources found no violation of state environmental laws, and the Department of Forestry said it does not issue logging permits.³ After a hearing, the judge agreed that the clearing violated both the zoning ordinance and the associated proffers.¹⁰

State forestry agencies can also weigh in on rezonings without having permit authority. The Virginia Department of Forestry told Prince William County that a proposed data center corridor next to Conway Robinson Memorial State Forest would have a negative impact on forest resources.¹¹ Comments like that feed directly into rezoning conditions on buffers, tree save areas and replanting.

For many wooded sites in the eastern half of the country, the binding constraint is not how many trees can be cut but when. The U.S. Fish and Wildlife Service published a final rule reclassifying the northern long-eared bat from threatened to endangered on November 30, 2022, and the change took effect March 31, 2023, after a 60-day delay so the Service could finish tools and guidance for landowners and industry.²⁷ The species’ range covers 37 states, and the reclassification removed the 4(d) rule that had limited tree removal restrictions mainly to areas near known hibernacula and roost trees.²

Guidance used in Virginia and Maryland says that projects with a “may affect” or “likely to adversely affect” finding face a no-clearing window from April 1 to November 14 unless further consultation is conducted with the Service or the Army Corps of Engineers, and recommends running the Service’s rangewide determination key for every project.⁸⁹ Negative acoustic or mist-net surveys can lift the restriction; one Virginia summary reports that negative results remain valid for five years for the Service, with a summer acoustic survey window of May 15 to August 15.⁹ A 2024 draft Service consultation framework was expected to narrow the restriction to the pup season (May 15 to July 31 in those states) in most cases; check whether it has been finalized before relying on it.⁹

A second bat may add to this. The Service proposed listing the tricolored bat as endangered across parts of 39 states and the District of Columbia, citing white-nose syndrome as the main threat.¹⁴ Check its current status on the Service’s species pages before setting a clearing schedule. Our endangered species guide covers IPaC screening, Section 7 and Section 10.

Migratory birds are a moving target. On April 11, 2025, Interior’s Acting Solicitor restored the earlier legal opinion that the Migratory Bird Treaty Act prohibits only intentional take, with an exception for actions within the Southern District of New York, where a court had vacated that opinion in 2020.¹⁵ Harvard’s regulatory tracker notes that Interior later announced a review of wind energy bird mortality that appears to be in tension with that reading.¹⁶ Many state and local permits still impose nesting season clearing limits, so ask the reviewing agency.

Forest and timing rules rarely kill a site outright, but they change acreage, cost and schedule. A short screen during the option period avoids most surprises.

1. 01Map forest cover and estimate how much of it falls inside the planned pads, roads and yards, then net out retention requirements in your gross vs. buildable acreage math.
2. 02Identify the reviewing program and pull its current ordinance, thresholds and grandfathering rules.¹⁶
3. 03Read the zoning and any recorded proffers or conditions for tree save areas, buffers and timbering limits.³
4. 04Run IPaC and the bat determination key early, and decide whether surveys or consultation are worth starting before closing.⁸⁹
5. 05Build the clearing window into the construction timeline so grading does not slip a full season.

If you want a second set of eyes on how forest cover affects a specific parcel, you can get a site reviewed.