Pennsylvania

Buying Land in Montgomery County, Pennsylvania

County seat Norristown, immediately northwest of Philadelphia. Montgomery County is Pennsylvania's third-most-populous county and its most populous without a major city of its own -- a mature, largely built-out Philadelphia suburb across 62 independently zoned municipalities. The one genuinely distinctive land-use feature here is real and still operating: the county's Agricultural Reserve and its decades-old Transferable Development Rights program, which caps rural housing density at one home per 25 acres in exchange for a sellable development right.

A Built-Out Philadelphia Collar Suburb, Not a Rural Land Market

Case-by-case / verify locally

With 856,553 residents across 487 square miles, Montgomery County is Pennsylvania's third-most-populous county and its most populous without a major city -- a mature, largely developed suburb of Philadelphia. Outside the Agricultural Reserve townships in the county's northwestern corner, expect infill lots and subdivided building parcels rather than open rural acreage.

The Agricultural Reserve: A Real, Still-Operating TDR Program

Case-by-case / verify locally

A meaningful stretch of Montgomery County's northwestern townships sits inside the county's Agricultural Reserve, where 1980 legislation capped new housing at one unit per 25 acres and created sellable Transferable Development Rights (TDRs) to compensate owners for the lost density. The program has preserved nearly 48,000 acres as of 2022 and is still active -- genuinely relevant if you're evaluating land inside or adjacent to the Reserve. See our dedicated zoning page for Montgomery County.

Standard Board of Commissioners, Own County Health Department for Septic

Generally favorable

Montgomery County is governed by a standard three-member, at-large Board of Commissioners (not a home-rule charter). Unlike most Pennsylvania counties, it also runs its own County Health Department, which itself administers Act 537 onlot sewage permitting rather than leaving that to each municipality's separate Sewage Enforcement Officer relationship.

Pennsylvania's most populous suburb, and where the exceptions live

Montgomery County -- seat Norristown, 856,553 residents at the 2020 Census across 487 square miles -- is Pennsylvania's third-most-populous county after Philadelphia and Allegheny, and its most populous county without a major city of its own. That scale, spread across 62 municipalities (18 boroughs and 44 townships), each administering its own zoning ordinance independently under the state Municipalities Planning Code, means most of the county reads like a mature, largely built-out Philadelphia suburb: established residential neighborhoods, corporate office and retail corridors along routes like 202 and the Pennsylvania Turnpike, and very little genuinely open rural acreage left to buy at any price point in most townships.

The exception -- and the reason this county earns more than a one-line "forget it, it's all built out" treatment -- is the county's designated Agricultural Reserve, a band of still-working farmland concentrated in Montgomery County's northwestern townships (Skippack, Upper Salford, Perkiomen, and neighboring townships in that corner of the county). County government took a deliberate, decades-old policy step to keep that land in agricultural use rather than letting it develop like the rest of the county, and that step is genuinely worth understanding before buying land in or near it.

The Agricultural Reserve and its Transferable Development Rights program

In 1980, Montgomery County adopted legislation creating a Rural Density Transfer Zone within the Agricultural Reserve: new housing development in the zone was capped at one house per 25 acres, a sharp reduction from the one-per-5-acre density previously allowed. To compensate landowners for that lost development potential, the county created a legal, sellable property right -- a Transferable Development Right (TDR) -- assigning one TDR for every five acres of land inside the designated rural zone. A landowner in the Reserve can sell their TDRs to a developer who wants to build at greater density somewhere else in the county (a "receiving" area zoned to allow it), effectively monetizing the development potential that was capped on their own land without having to develop it themselves.

This is not a dead or symbolic program: between 1981 and 2007, roughly 9,700 TDRs were severed from Agricultural Reserve properties, with about two-thirds transferred to receiving-area development projects elsewhere in the county, and the program has preserved 47,903 acres of agricultural land as of 2022. For a buyer, this cuts two ways depending on which side of the transaction you're on. If you're buying land inside the Agricultural Reserve expecting to subdivide or build at higher density later, the 1-per-25-acre cap is a real, binding constraint -- though the parcel may carry unsold TDRs that have value in their own right, separate from the land's development potential. If you're evaluating land in a "receiving" district elsewhere in the county, a nearby project's use of purchased TDRs to build at higher density than the base zoning would otherwise allow is worth understanding as part of your own due diligence on future neighborhood density. See our dedicated zoning page for Montgomery County for more detail on how this actually plays out for a specific transaction.

Government, septic, and records

Montgomery County is governed by a standard three-member, at-large Board of Commissioners -- elected countywide for four-year terms, with state law reserving one of the three seats for the minority party -- rather than a home-rule charter. The commissioners name department heads, adopt the annual budget, and oversee county property and finances, but zoning itself remains entirely a function of the county's 62 individual municipalities, none of which cede that authority to the county Planning Commission.

Septic is one place Montgomery County genuinely differs from most of this project's Pennsylvania coverage: it is one of the handful of Pennsylvania counties that runs its own County Health Department, and that department -- not a patchwork of separate municipal Sewage Enforcement Officer relationships -- directly administers Act 537 onlot sewage permitting countywide, including soil-probe and percolation testing review and final system approval. If a parcel isn't served by public sewer (increasingly rare outside the Agricultural Reserve townships and a few other pockets), plan your due diligence around the county Health Department's own process rather than a township-specific SEO.

What we could and couldn't confirm

Montgomery County's FIPS code (42091) is corroborated via Geocodio's GEOID listing and FipsDecoder.com and is consistent with the alphabetical PA FIPS sequence verified across this project's other PA county files. Population (856,553), area (487 sq mi), and rank (third-most-populous, most populous without a major city) are drawn from Wikipedia's cited Census figures. The Agricultural Reserve's 1980 legislation, its 1-per-25-acre density cap, its Transferable Development Rights mechanism (1 TDR per 5 acres), the roughly 9,700 TDRs severed 1981-2007, and the 47,903-acre preservation total as of 2022 are drawn directly from the Montgomery County Planning Commission's own program page and corroborated by Wikipedia's cited figures for the same program -- this page did not independently verify the current TDR-transaction ledger or confirm whether the 2022 acreage figure has since been updated. Montgomery County's own County Health Department administering Act 537 septic permitting directly (rather than municipal SEOs) is confirmed via the county's own On-Lot Sewage Permitting page. Direct WebFetch to montgomerycountypa.gov was not attempted; findings rely on WebSearch-indexed content.

Verify directly with: the specific municipality for zoning jurisdiction, the Montgomery County Planning Commission for current Agricultural Reserve boundaries and TDR program status, and the Montgomery County Office of Public Health for septic permitting

Who to Call Before Buying Land in Montgomery County

Direct WebFetch to montgomerycountypa.gov was not attempted in this research pass, so several department pages, phone numbers, and hours reflect search-indexed content rather than a full verbatim read -- confirm current staff and contact details directly, and confirm zoning jurisdiction and Agricultural Reserve/TDR status with the specific municipality and Montgomery County Planning Commission before relying on this page for a specific parcel.

Planning & Zoning

Montgomery County Planning Commission

Countywide planning coordination and the Agricultural Reserve / TDR program -- confirm the specific municipality for actual zoning jurisdiction, since the Planning Commission does not administer zoning itself.

Official website →

Building & Permitting

Montgomery County (municipality-specific)

Zoning and building permits -- contact the specific borough or township directly.

Official website →

Septic / Onsite Wastewater

Montgomery County Office of Public Health -- On-Lot Sewage Permitting

Onlot sewage (septic) permits, soil probes, and perc testing -- administered directly by the county Health Department rather than a separate municipal SEO.

Official website →

GIS / Parcel Records