CHAPTER 2
From 1993 to 2005 more than 14,000 acres were developed in the county. Most was residential development totaling 9,000 acres, or about 67% of the total land area developed during that time period. Most new home construction was single-family dwellings constructed on lots approximately averaging one-half acre in size. It occurred in typical suburban developments in the northwestern and western portions of the County, primarily in Marshall, Pine, Moon, Collier, North Fayette, South Fayette and Robinson Townships. The north-central and eastern portions of the County also experienced an increase in residential development.
Commercial land uses (including retail and office space) were the second most significant land use between 1993 and 2005. Commercial development took place on 1,400 acres, or 11% of the total acreage developed during that time period.
Industrial development and redevelopment took place on 1,000 acres throughout the County, including former brownfields.
The remainder of development was a variety of uses – office, community facilities, mixed use – scattered on 2,000 acres throughout the County.
If recent development patterns continue, growth would mostly occur as low-density development in the northern and western parts of the County, while core areas and older boroughs would continue to decline.
PENDING AND PROPOSED DEVELOPMENT
To further understand current development trends, we examined where pending and proposed development is planned to occur. These are development projects that have been approved, but not yet built. We sent a survey requesting information about such developments to each municipality. The Pending and Proposed Development Map that was developed reflects municipal responses to the survey (see Map 2.2).
The pattern for development in the near future, as reflected in the Pending and Proposed Development Map, follows a pattern similar to the Major Land Development Map. Most of the development is proposed in the outer perimeter of the County, with the exception of a limited number of projects within Pittsburgh.
THE 2025 TREND SCENARIO MAP
The 2025 Trend Scenario map (see Map 2.3) was created from forecasts and analysis of development patterns and trends discussed above. It is a graphic representation of the total amount of land required to accommodate future housing and non-residential development. The future development has been placed in areas of the County that are supported by actual development activity in the recent past. Through the use of available data, an estimated 50,000 residential units and 10,000 acres of non-residential development is what the county can expect to experience over the next 20 years. The map uses “chips” of residential (yellow), retail (red) and employment centers (pink), which includes industrial and office development, to graphically depict the expected future development. The yellow chips represent 200 residential units, the red and pink chips represent 100 acres of development or 1,000 and 2,500 jobs respectively.
In addition to the new growth expected in the County, the 2025 Trend Scenario also depicts areas that are losing residential units. The blue “chips” represent 200 residential units and total 16,000 units to be lost or demolished during the 20 year time frame (based on US Census Bureau data). In terms of the City of Pittsburgh and other areas, these blue “chips” are also viewed as areas of opportunity for new development to take the place of older vacant or dilapidated structures.
The resulting pattern shows development spreading out in the northern and western portions of the County, while the core communities are experiencing decline. The 2025 Trend Scenario is by no means a recommended plan or set of policies for the county. The 2025 Trend Scenario is merely an informed assumption as to what the county could be like in 20 years assuming a continuation of recent land development trends.