I think the County is in violation of Virginia eminent domain law.
2011 Code of Virginia
Title 1 GENERAL PROVISIONS.
Chapter 2.1 Common Law and Rules of Construction (1-200 thru 1-257)
1-219.1 Limitations on eminent domain.
(emphasis mine-some passages I think are not relevent are omitted)
Universal Citation: VA Code § 1-219.1 (2001 through Reg Session)
1-219.1. Limitations on eminent domain.
A. The right to private property being a fundamental right, the General Assembly shall not pass any law whereby private property shall be taken or damaged for public uses without just compensation. The term "public uses" mentioned in Article I, Section 11 of the Constitution of Virginia is hereby defined as to embrace only the acquisition of property where: (i) the property is taken for the possession, ownership, occupation, and enjoyment of property by the public or a public corporation; (ii) the property is taken for construction, maintenance, or operation of public facilities by public corporations or by private entities provided that there is a written agreement with a public corporation providing for use of the facility by the public; (iii) the property is taken for the creation or functioning of any public service corporation, public service company, or railroad; (iv) the property is taken for the provision of any authorized utility service by a government utility corporation; (v) the property is taken for the elimination of blight provided that the property itself is a blighted property; or (vi) the property taken is in a redevelopment or conservation area and is abandoned or the acquisition is needed to clear title where one of the owners agrees to such acquisition or the acquisition is by agreement of all the owners.
(Is it not a taking to restrict the use of one's own property? Nothing here about creating a "buffer zone")
"Public facilities" means
...(ii) educational facilities;...(ix) parks so designated by the Commonwealth or by the locality in its comprehensive plan; ...
But nothing about an additional buffer zone, nothing about safety, for example
C. No more private property may be taken than that which is necessary to achieve the stated public use.
Seems pretty clear cut.
D. Except where property is taken (i) for the creation or functioning of a public service corporation, public service company, or railroad; (ii) for the provision of any authorized utility service by a government utility corporation; or (iii) for sanitary sewer, water or stormwater facilities, or transportation facilities, including highways, roads, streets, and bridges, traffic signals, related easements and rights-of-way, mass transit, ports, and any components of federal, state, or local transportation facilities, by a public corporation, property can only be taken where: (a) the public interest dominates the private gain and (b) the primary purpose is not private financial gain, private benefit, an increase in tax base or tax revenues, an increase in employment, or economic development.
E. During condemnation proceedings, the property owner may challenge whether the
taking or damaging is for a public use, the stated public use is a pretext for an unauthorized use, or the
taking or damaging of property is a violation of subsection D. Nothing in this section shall be construed as abrogating any defenses or rights otherwise available to the property owner independently of this section.
I think all this together means the ordinance is illegal
From FindLaw (VA law does not state this exactly that I could find):
In an eminent domain action, what is necessary in order for a "taking" to occur is not always a formal transfer of interest in the property. Rather, what is required is a destruction of a personal
interest in property, or such a
drastic interference with the use and enjoyment of that property so as to constitute a taking. In other words, the impairment is so severe that it is tantamount to the assertion of a servitude on the property for the benefit of the government.
Just my two cents.