Display to header level
Agricultural Protection Zoning (APZ) preserves the availability of agricultural lands for farming and thus the agricultural base of the community by constraining non-agricultural development and land uses in designated areas.
Agricultural Protection Zoning (APZ) is used by municipalities to preserve the availability of agricultural lands for farming and provide stability to the farming economy. The local government designates areas where agriculture is intended to be the principal use. Regulations are established for these agricultural zoning districts to constrain non-agricultural development and uses. APZ regulations can help to:
Areas that typically make good candidates for APZ have the following characteristics:
Local governments must state the intent of the APZ district in their zoning ordinance. The intent might include many of the following potential purposes or variations:
There are advantages and disadvantages to APZ. Advantages include that APZ:
Disadvantages include that APZ:
Often, implementation of APZ begins with a community’s update or establishment of a new comprehensive plan. During the comprehensive planning process, a desire to retain agriculture in the community is identified. This desire is then reflected in the vision, goals and objectives of the community set forth in the comprehensive plan.
Also during the planning process, data to support the creation of an agricultural zoning district is collected, such as mapping of present land use, parcel ownership, soils, farmland preservation activities and natural features. Using this information, areas proposed for agricultural use into the future are mapped on the comprehensive plan’s “Future Land Use Plan”.
The planning process can foster public support for establishment of the APZ district through the public participation opportunities built into the process including a resident survey, information meetings, interviews, workshops, focus group meetings, and official public meetings and public hearings held prior to adoption of the plan.
After the comprehensive plan is adopted, the municipal zoning ordinance should be updated to be consistent with the comprehensive plan. The mapping of the agricultural district should be based on the future land use plan and the public participation process during the zoning ordinance preparation process. This participation typically includes zoning committee meetings, public workshops, and focus group meetings with the agricultural community. The agricultural district’s specific restrictions will result from the process of reviewing the comprehensive plan, discussing the alternative approaches to agricultural zoning, and involving the public in crafting of the district. The public, particularly the farm community, should be made aware of the zoning effort and the advantages and disadvantages of various agricultural zoning approaches, and given an opportunity to participate in the zoning process. Workshops, newsletters and websites can be used as a tool to inform and educate the community.
Writing, adoption, and enactment of the ordinance provisions typically occur with the assistance of a land use planner and/or municipal solicitor, and are directly guided by the municipality’s elected and appointed officials, and any appropriate staff and/or other municipal consultants (e.g., municipal planner, engineer, solicitor).
The proposed zoning mapping and district regulations must be sent to the county planning commission for review. The municipal planning commission holds a public meeting. Ideally, this meeting is held after receipt of county comments, but the municipal planning commission does not have to wait for county comments. The municipal planning commission reviews any comments received from the public, makes revisions as appropriate, and then recommends the zoning ordinance to the governing body. The governing body holds a public hearing on the zoning prior to finalization and adoption of the zoning ordinance. No action can be taken by the governing body until the county comments are received or 45 days pass after submission to the county.
Historically, municipalities have taken several different approaches to crafting the permitted uses and restrictions for lands within an Agricultural Preservation Zoning District.
Exclusive agricultural zones basically allow only agricultural and agricultural support operations. They are not typically used because of the concern for being challenged as exclusionary with the resultant possibility of being struck down by the courts.
With large lot zoning the minimum lot size is specified as something in the order of 25, 40 or 50 acres to severely restrict residential development. Such a lot size may or may not be large enough to support the needs of a working farm. Also, subdivisions producing new lots of 25 acres that become residential estates can remove a significant amount of prime farmland soil from production.
Area based allocation takes several forms. The general idea is to allow for residential development to avoid the exclusionary challenge. One dwelling might be allowed per a specified number of farm acres, such as 25. In another approach, a percentage (such as 10%) of a parcel is permitted to be developed for residential purposes. Cluster development of homes can be allowed on the land to be developed. The Lehigh Valley Planning Commission’s model agricultural land protection zoning ordinance uses a 90/10 ratio of protected farmland to land suitable for residential subdivision.
Sliding-scale zoning is now the most commonly used version of area based allocation. The number of residential lots permitted is based on the size of the farm. As the size of a parcel increases, the number of dwellings allowed in relation to the total farm area decreases (e.g., a 40-acre parcel might be allowed three dwelling units, while a 200-acre farm might be allowed eight dwelling units and a 300 acre farm allowed ten dwelling units). In this approach, a maximum residential lot size such as two acres is specified in order to maximize the area available for agricultural production and minimize the area devoted to residential purposes. Many ordinances require residential units to be located on the least productive soils and located to minimize interference with agricultural production.
In 2010, Lower Mount Bethel Township in Northampton County adopted a new agricultural protection district for roughly 70% of their township that allows tracts or parcels to be subdivided by the Lehigh Valley Planning Commission’s suggested 90/10 ratio – i.e., 10 percent of the total tract area subdivided into single-family residential lots (as small as ½ acre, or as on-lot sewer and water will allow] provided the other 90 percent is permanently retained in agriculture; or, subdivide all or some of the entire tract into 10-acre or larger “estate” lots; or, using a sliding scale method, subdivide smaller lots from the larger tract based on a permitted number of lots per original tract size [again, with new lots as small as ½ acre, or as on-lot sewer and water will allow). The Brandywine Conservancy’s Environmental Management Center helped the Township and its solicitor draft this ordinance.
Future subdivision plans may be required by the agricultural protection zoning to contain a note such as the following from the Agricultural District in the Southwestern Berks County Zoning Ordinance.
“All lands within the Agricultural Preservation District are located in an area where land is used for commercial agricultural production. Owners, residents and other users of this property or neighboring property owners may be subjected to occasional inconvenience, discomfort and the possibility of injury to property and health arising from normal and accepted local agricultural practices and operations, including but not limited to noise, odors, dust, the operation of machinery of any kind, including aircraft, the storage and disposal of manure, the application of fertilizer, soils amendments, herbicides and pesticides. Owners, occupants and users of this property should be prepared to accept such conditions and inconveniences, discomfort and possibility of injury from normal agricultural operations, and are hereby put on official notice that the state Right to Farm Law (Act 133 of 1982) may bar them from obtaining a legal judgment against such normal agricultural operations."
The requirement for the note would be established within the zoning ordinance initially. The subdivision and land development ordinance could then contain a requirement that such a provision be shown on the subdivision plan when required by the zoning ordinance.
The following items need to be addressed in the zoning ordinance:
See the “Purposes of APZ” heading above.
Key definitions include Agricultural Operations, Agriculture, General Agriculture and Intensive Agriculture; Animal Unit if that approach is used to differentiate General and Intensive Agriculture; Farm, Farm Building, Farm-Related Business, and Prime Agricultural Land.
Uses permitted by right are included, such as the growing of crops, animal husbandry up to a certain intensity, greenhouses up to a certain size, sale of farm products, dwellings for farm owner and/or manager, accessory processing of farm products, and farm-related businesses. Uses permitted by special exception or as a conditional use might include intensive agricultural uses, such as animal husbandry above a certain intensity (i.e., CAFOs), greenhouses above a certain size or impervious coverage limitation, mushroom production and composting, permissible residential subdivision, aquaculture, and animal hospitals and veterinary facilities.
It is quicker, easier and cheaper for the farmer if the use is permitted by right, and generally, APZ districts attempt to maximize the uses permitted by right. Most traditional agricultural activities are usually allowed by right. Some uses, which are more intensive in nature and have more potential for adverse impacts (such as odors and pests) on surrounding uses, are typically allowed by special exception or conditional use. This allows the Zoning Hearing Board or governing body to review proposed activities and impose additional reasonable conditions on a use to mitigate the potential for adverse impacts. CAFOS and mushroom operations are typically most likely to require the additional review.
If the right to subdivide for residential purposes will be provided to the farmer, the ordinance needs to address which approach discussed above (e.g., area based allocation or sliding scale) will be utilized as well as provide specific standards governing subdivision. Such standards would address number of lots or percentage of tract to be developed, lot size minimum and maximum, location of lots and minimization of disturbance to agricultural operations and prime agricultural soils.
The ability to subdivide for agricultural purposes should also be permitted, whether to establish a new farm parcel, or to convey land to another farmer, to be combined with those holdings.
Area, yard, coverage and height restrictions are specified for permitted non-residential and residential uses, including minimum lot size; minimum front, side and rear yards; maximum building and impervious coverage; and maximum building height.
The agricultural district regulations, and other districts in the ordinance as necessary, should:
The agricultural zoning district is mapped on the zoning map, using factors mentioned above, such as existing agricultural use being the primary land use, agricultural conservation easements, agricultural security areas, productive soils and potential for farming to continue and be viable.
A separate agricultural zoning district is included in the ordinance text, rather than in an overlay provision. Some zoning ordinances may include more than one agricultural district, usually to differentiate areas where certain intensive agricultural uses or certain processing activities or other agricultural-related industry may be allowed in addition to cropland and less intensive agricultural uses.
The following information should be collected in support of APZ:
The conduct of either an exclusionary zoning analysis, and/or “fair share” analysis, in order to insure that the municipality has sufficient vacant land zoned for all types and densities of residential uses as required by the MPC, and in certain cases, can provide for its “fair share” of regional growth, after the new agricultural district is adopted. Municipalities that cannot meet these two “requirements” run the risk of successful curative challenges and court-ordered development approvals in the middle of their productive agricultural lands.
In 1971, Lower Heidelberg Township in Berks County was still a rural, and predominantly agricultural, township on the urban fringe of the Reading urban area. Much of the soils in the Township are fertile Carbonate soils. Township officials saw that adjoining townships once rural had become suburban with much farmland lost to development.
“Identify a plan for the preservation and enhancement of prime agricultural land and encourage the compatibility of land use regulation with existing agricultural operations.”
The MPC defines agricultural operation as an enterprise that is actively engaged in the commercial production and preparation for market of crops, livestock and livestock products and in the production, harvesting and preparation for market or use of agricultural, agronomic, horticultural, silvicultural and aquacultural crops and commodities. The term includes an enterprise that implements changes in production practices and procedures or types of crops, livestock, livestock products or commodities produced consistent with practices and procedures that are normally engaged by farmers or are consistent with technological development within the agricultural industry.
Section 603 of the MPC states that: “Zoning ordinances may contain… provisions to promote and preserve prime agricultural land.” … may permit, prohibit, regulate, restrict, and determine… protection and preservation of… prime agricultural land and activities.” The MPC goes on to state that: “zoning ordinances shall protect prime agricultural land and may promote the establishment of agricultural security areas”; that they “shall encourage the continuity, development and viability of agricultural operations”; and that they “may not restrict agricultural operations or changes to or expansions of agricultural operations in geographic areas where agriculture has traditionally been present, unless the agricultural operation will have a direct adverse effect on the public health and safety.” Section 604 of the MPC states that the zoning ordinance shall be designed to, among other things, “preserve prime agriculture and farmland considering topography, soil type and classification, and present use.”
In suburban municipalities where farmland had been zoned for suburban residential development (i.e., one or two-acre zoning) and land values reflect residential development more so than agricultural uses, a change in zoning to an agricultural protection district will likely have an adverse impact on land values. In such cases, other tools, such as Transferable Development Rights, can be included as an option within the new agricultural district, where farmers and other landowners can sever and sell TDRs as a way to recapture their potentially lost land value.
In more rural areas, or in areas where open space is viewed as a value-added, however, the rezoning of land to an agricultural protection district may not significantly harm land value, particularly in the long-term. For example, before Highland Township (Chester County adopted their one per 25-acre agricultural preservation district, the Brandywine Conservancy, as township planner, commissioned a market analysis. The analysis looked at township land values through hypothetical “before and after” rezoning scenarios. The analysis also compared Highland Township land sales with adjoining West Marlborough Township land sales based on a long-standing agricultural protection district in place in that municipality. There was little difference between land values in the two municipalities, even though Highland’s current zoning allowed far greater residential development potential. Like its neighboring township, West Marlborough, Highland Township’s fertile fields were also valued for the raising, keeping, and daily exercise of horses. The proposed change in zoning from a two and one-half acre minimum lot size to a one house or lot for every twenty-five acre density was expected to have an insignificant effect on local property values. That has proven true to date.
Sometimes the impact of APZ on land values will be mixed. In Lower Mount Bethel Township (Northampton County), for example, a market analysis commissioned by the Township showed that the value of large farms (80 to 100 acres plus) would probably be adversely affected by a proposed downzoning, simply because such farms were not being bought by farmers to continue farming. However, the analysis also found that other agricultural parcels of 25 to 60 acres would not likely be adversely impacted by the proposed downzoning, given their conservation buyer value, or their attractiveness to farmers for leasing purposes.
What do broader studies have to say about the impact of APZ on land values? A 2003 study conducted in Maryland on behalf of the Maryland Center for Agro-Ecology, Inc. showed that downzoning had little effect or resulted in higher land values in the four studied counties. A 2004 study conducted on behalf of the New Jersey Farm Bureau showed that downzoning harms land values in six municipalities. A subsequent analysis of these two studies, “Downzoning and Rural Land Markets: A review of two recent studies in Maryland and New Jersey,” found these two studies to be deeply flawed in their methodologies. The analysis also made this observation:
Economic theory does not give a clear answer on whether downzoning should decrease or increase property values. First, downzoning can negatively impact property values because it puts a constraint on development opportunities. This negative impact could be large for properties with great development potential. However, downzoning could also have several positive impacts that offset the loss of development opportunities. The positive effects could include the enhanced environmental and landscape amenities valued by buyers, protecting a critical mass of farms in the local agricultural community, and the viability of non-development land uses, reduced burdens on local government services such as schools and roads, and reduced uncertainty about future land use. Which of these offsetting effects dominates is an empirical question, and the magnitude of the effects will vary between markets and individual properties within the same market.
Pre-1973, Pennsylvania municipalities adopted zoning districts which were called “Agriculture,” but which typically specified a minimum lot size of one to ten acres and allowed a variety of non-agricultural uses as well. In 1973, based on models used in the Midwest, Lower Heidelberg Township in Berks County adopted an effective agricultural zone, which specified a 40-acre minimum lot size and severely restricted non-agricultural uses. This was the first use of APZ in Pennsylvania. After the sliding-scale agriculture zoning approach subsequently used in York County was validated in the Courts, the sliding-scale approach became favored because it was less likely to be challenged as exclusionary than the large minimum lot size approach.
By 1993, 93 municipalities had adopted APZ, covering 725,000 acres, or 10% of land in farms in Pennsylvania. APZ continues to be adopted by municipalities in Pennsylvania, particularly in Berks, Lancaster, Chester, and York Counties, where the County Planning Commissions have supported adoption of such zoning through technical assistance, distribution of model ordinances and financial assistance. By 2010, in Berks and Lancaster County alone, 65 municipalities had adopted APZ Districts protecting over 482,000 acres. In those counties, even though there has been some attrition of individual farms to development because of rezoning or zoning relief via the zoning hearing board, the general trend is to more municipalities adopting such zoning and an increase in the total number of acres protected.
Some municipalities in Pennsylvania have now had effective agricultural zoning in place for over 35 years.
Given the limited resources available to help protect agricultural land through conservation easements, APZ has been a successful and an important tool to assure large agricultural areas are kept relatively free of non-farm development; provide a supply of agricultural land for rental by farmers; protect the public investment in the purchase of agricultural easements by preventing loss of adjacent and nearby farmland; delay development of some farm land until easements can be purchased; keep farmland affordable for farmers, and protect the extent of farm areas necessary to provide a continuing market for agricultural support services.
The validity of APZ has been upheld in Pennsylvania Courts, though how the zoning ordinance is drafted (and adopted) is important to its validity. Key cases upholding agricultural zoning ordinances include:
Agricultural protection zoning can be used with other tools, such as:
Agricultural Security Areas. Landowners may petition local governments to establish an Agricultural Security Area (ASA). In an ASA, farmers are entitled to special protection from condemnation and laws and ordinances that would unreasonably restrict farming operations. Designation as an ASA does not require farmland owners to preserve their farm for agricultural use; designation does not constrain developmen
Agricultural Conservation Easement Purchase Program. The Agricultural Conservation Easement Purchase Program enables state, county and local governments to pay farmers for agreeing to limit the use of their land to agricultural production, commercial equine activities and certain other uses. The program has very specific requirements and criteria for ranking applicants. The program is in high demand by farmers and county waiting lists are long. (One prerequisite is that the parcel(s) have to be located within an established Agricultural Security Area.)
Transfer of Development Rights. Transfer of Development Rights is a zoning technique used to permanently protect farmland and other natural and cultural resources by redirecting development that would otherwise occur on these resource lands to areas planned to accommodate growth and development. The TDR tool, when combined with APZ, provides farmers and other landowners with another option that, through the severance and sale of TDRs, enables them to capture financial value.
Growing Greener: Conservation By Design. This tool helps municipalities and developers build new housing and businesses while protecting important natural and cultural resources including farmland. With straightforward changes to municipal ordinances, new subdivisions can set aside half or more of buildable land for active farming and other open space uses. Whether it can be combined with APZ in a productive way that is acceptable to Pennsylvania’s courts is unknown at this time.
Clean and Green. In many counties Clean and Green provides for lower property tax assessments of land capable of producing wood products, agricultural land, and open space land open to the public. Clean and Green encourages farmers to keep farming on their land(s) by providing a tax incentive for not developing the land, but does not prevent the sale of farmland for residential, commercial and/or industrial land developments/subdivisions. This is a voluntary program, and 10 acres is the minimum amount of contiguous acres needed to receive the benefits of this program.
The following is a menu of administrative and supplemental zoning policies designed to encourage and protect agriculture:
Initial draft prepared by SSM with contributions by Andy Loza and John Theilacker. Edited by Andy Loza.
Copyright © is held by the Pennsylvania Land Trust Association
Text may be excerpted and reproduced with acknowledgement of ConservationTools.org and the Pennsylvania Land Trust Association.