How Builders Decide Where to Build New Housing in Pennsylvania

3/6/2026

How Builders Decide Where to Build New Housing in Pennsylvania

A Guide for Landowners Who May Be Sitting on Development Land

Across Pennsylvania, new housing developments appear every year. Subdivisions expand into farmland. Townhome communities appear in growing suburbs. Apartment buildings rise near employment centers.

For landowners, this often raises an important question:

Why do builders choose certain locations for development while ignoring others?

The answer involves a detailed evaluation of several key factors.

Home builders and residential developers carefully analyze potential development sites before purchasing land. These decisions involve economic analysis, infrastructure considerations, zoning regulations, and local housing demand.

Understanding how developers choose where to build can help landowners recognize when their property may be located in the path of growth.

Housing Demand Is the Starting Point

The first factor developers consider is market demand. Before purchasing land, builders analyze whether homes in a particular area will sell quickly and profitably.

This analysis often includes:

• recent home sales
• population growth
• employment trends
• migration patterns
• housing inventory levels

If demand for new housing is strong, developers begin searching for land that can support residential construction.

Employment Centers Drive Housing Growth

Housing demand typically follows employment. When job growth occurs in a particular region, nearby communities often experience increased residential development.

In Pennsylvania, major employment centers include:

• Philadelphia metropolitan area
• Pittsburgh metropolitan region
• Lehigh Valley
• Harrisburg region
• Lancaster and York counties

Housing demand often spreads outward from these economic centers into surrounding suburban communities.

Transportation Access Is Critical

Transportation access plays a major role in residential site selection. Builders often look for land located near major highways and transportation corridors.

Important residential growth corridors in Pennsylvania include:

• Interstate 76 (Pennsylvania Turnpike)
• Interstate 78 (Lehigh Valley corridor)
• Interstate 81 (Central Pennsylvania logistics corridor)
• Interstate 79 (Western Pennsylvania growth corridor)
• Interstate 95 (Philadelphia metropolitan area)

Convenient access to employment centers and commuting routes increases housing demand.

Sewer and Utility Infrastructure

One of the most important factors influencing residential development is utility availability.

Public sewer and water systems allow higher residential density. Without sewer infrastructure, development may be limited to large-lot homes using septic systems. Many suburban housing developments occur in areas where sewer infrastructure is expanding.

Utility access often determines whether land can support:

• single-family subdivisions
• townhome communities
• multifamily developments

Zoning and Municipal Planning

Local zoning regulations determine what types of housing can be built on a property.

Municipal zoning codes may specify:

• minimum lot sizes 
• residential density limits
• building setbacks
• permitted housing types

Developers often search for land located in zoning districts that already allow residential development. In some cases, developers may pursue rezoning to increase density or allow different housing types.

Municipal comprehensive plans also play an important role, as they often identify areas intended for future residential growth. 

School Districts and Residential Demand

School districts are an important factor in residential development.

Many homebuyers prefer communities with strong public schools. As a result, residential developers often seek land located within school districts that attract strong buyer demand.

In suburban areas especially, school districts can influence both home prices and the speed at which homes sell.

Land Size and Development Potential

Residential development typically requires parcels large enough to accommodate:

• internal roads
• stormwater infrastructure
• open space requirements
• utility corridors

Many subdivisions are built on parcels ranging from:

• 20 acres to several hundred acres.

However, smaller parcels may still support infill housing developments in urban or suburban locations.

Environmental Constraints

Developers must also evaluate environmental conditions before purchasing land.

Common environmental factors include:

• wetlands
• floodplains
• steep slopes
• stormwater management requirements
• protected natural areas

These conditions can reduce the number of homes that can be built on a property.

A site that appears large enough for development may have limited buildable acreage once environmental constraints are considered.

Market Competition

Developers also study competing projects in the area. If multiple subdivisions are already under construction nearby, builders may wait until existing inventory is absorbed before starting another development.

Conversely, if few new homes are available in a particular market, builders may move quickly to secure land.

Housing Product Types

Different markets support different types of housing.

Developers evaluate whether the surrounding area is best suited for:

• traditional single-family homes
• townhomes
• active-adult communities
• multifamily apartments

Each housing type requires different densities and infrastructure.

Pennsylvania Regions Experiencing Residential Growth

While growth patterns change over time, several regions in Pennsylvania have seen consistent residential development.

Philadelphia Suburbs

Population growth and proximity to employment centers continue to drive suburban housing demand.

Lehigh Valley

Migration from nearby states and economic growth have increased demand for housing.

Pittsburgh Suburbs

Suburban communities surrounding Pittsburgh remain active residential markets.

South Central Pennsylvania

Lancaster, York, and surrounding counties continue to see steady development.

Harrisburg Region

Employment growth and transportation access support residential expansion.

How Developers Identify the “Path of Growth”

Developers often study regional trends to determine where future growth may occur.

Indicators of growth may include:

• new highway infrastructure
• expanding sewer service areas
• new schools or hospitals
• retail and commercial development
• population migration patterns

Land located near these trends may eventually attract interest from residential developers.

Common Landowner Misconceptions

“Developers only build in cities.”

Many residential developments occur in suburban or semi-rural areas.

“My land is too far from town.”

Areas that appear rural today may become suburban over time as infrastructure expands.

“Only large parcels attract developers.”

While large parcels are common, smaller properties may still be attractive for infill development.

Frequently Asked Questions

What size land do builders look for?

Many subdivisions are built on parcels ranging from 20 to several hundred acres, although smaller sites may work for certain housing types.

Do builders prefer land with sewer access?

Yes. Sewer infrastructure allows higher-density residential development.

How do developers determine land value?

Developers evaluate potential home prices, development costs, and required profit margins to determine what they can pay for land.

Do builders purchase farmland for development?

Yes. Farmland located near growing communities often transitions into residential development land.

Final Advisory Perspective

Residential development in Pennsylvania follows patterns driven by population growth, employment centers, transportation infrastructure, and municipal planning.

For landowners, understanding how developers select building sites can reveal opportunities that may not be immediately obvious. Land located near expanding infrastructure, growing communities, or strong housing markets may eventually attract interest from residential developers.

Recognizing these trends can help landowners evaluate whether their property may have residential development potential.

Considering Selling Residential Development Land in Pennsylvania?

Before marketing land to developers, property owners should evaluate:

• zoning and density potential
• sewer and utility availability
• access to transportation corridors
• housing demand in the region

These factors determine whether a property may be attractive for residential development.