Chester County PA Construction Permits: Municipal UCC, County Planning, and the Conservation District

Pennsylvania / Chester County · Field reference for Philadelphia exurban development

Chester County is the western bookend of the Philadelphia metropolitan area — the Brandywine Valley, the Route 202 / Route 100 corridors, the legacy DuPont / Avondale / Jennersville suburbs, and the life-science / data-center / logistics growth hubs emerging around Malvern, West Chester, and Exton. Unlike unified county permit jurisdictions (Maryland, Virginia), Pennsylvania's Uniform Construction Code (UCC) is enforced at the municipal level — each borough and township chooses to opt in or opt out of local enforcement under Act 45. See our PA UCC essay.

This means there is no "Chester County building permit." There are 73 municipal building permit authorities — townships, boroughs, and the two Philadelphia-adjacent cities (Coatesville, Downingtown) — each operating as its own permitting jurisdiction within the common UCC framework.

The municipal UCC structure

Each Chester County municipality:

• Enforces the UCC either through its own building code officials (opt-in enforcement) or through PA L&I or a certified third-party agency (opt-out delegation).
• Administers its own zoning ordinance under the Pennsylvania Municipalities Planning Code (MPC) — see our MPC essay.
• Administers its own Subdivision and Land Development Ordinance (SLDO).
• Runs its own Zoning Hearing Board for variances and special exceptions.

For a developer, intake requires verifying the exact municipality of the project parcel. A parcel in "West Goshen Township" versus "East Goshen Township" versus "Borough of West Chester" has three different enforcement authorities, three different zoning ordinances, and three different SLDOs — even though all three are in Chester County.

Chester County Planning Commission

The Chester County Planning Commission (CCPC) is an advisory county agency providing planning support to municipalities. CCPC:

• Reviews subdivisions and land developments referred by municipalities and provides non-binding recommendations.
• Administers county-level planning documents including Landscapes3 (the 2018 county Comprehensive Plan).
• Operates GIS and mapping services.
• Administers county-level programs: Open Space Preservation, Agricultural Preservation, Urban Centers, Trails.
• Reviews transit and multimodal projects.

Unlike M-NCPPC in Montgomery and Prince George's (Maryland), CCPC is advisory only. Municipalities retain decision authority.

Chester County Conservation District

Stormwater, sediment control, and NPDES (PAG-02) review are delegated from PADEP to the Chester County Conservation District (CCCD) for most projects. CCCD:

• Reviews E&S Control Plans for projects disturbing 5,000 sf or more.
• Coordinates PAG-02 NPDES general permit coverage.
• Identifies projects that may require Individual NPDES (see our PA NPDES essay).
• Conducts construction inspections.
• Reviews Chapter 102 post-construction stormwater plans.

CCCD's review is a gating step for PADEP NPDES approval and, functionally, for municipal permit issuance in most cases.

Act 537 Sewage Planning

Pennsylvania Sewage Facilities Act (Act 537) requires each municipality to adopt a sewage facilities plan (a "537 Plan") identifying how sewage will be treated. New development requires Act 537 planning compliance — either through an existing 537 Plan that contemplates the development's sewage or through a Planning Module that amends the plan to cover the new development.

See our Act 537 essay.

In Chester County, where much of the population is on public sewer from municipal authorities (Downingtown Area Regional Authority, West Chester University / Borough, Chester County Water Resources Authority, Chester Water Authority, etc.) and substantial portions are on private on-lot septic, Act 537 planning is often the critical-path item for new subdivisions and developments.

Notable Chester County constraints

• Brandywine Creek Watershed — Exceptional Value (EV) designation under PADEP's antidegradation rule affects post-construction stormwater design and may trigger Individual NPDES.
• Chester County Open Space Preservation — county- and local-funded open space acquisition and agricultural preservation easements substantially constrain subdivision in rural western and southern county.
• Historic Districts and Landmarks — Valley Forge National Historical Park (federal), West Chester Historic District, Chadds Ford (Wyeth country), Wallace Township. Local historic ordinances apply where adopted.
• SEPTA / Amtrak — rail corridors through the eastern county; adjacency requires coordination for grade crossings, utility crossings, setbacks.
• PennDOT — state-maintained roads (Route 202, Route 100, Route 30, Route 322, US 1); Highway Occupancy Permit (HOP) required for any access or work in ROW.

Permit lifecycle (typical commercial new construction)

1. Pre-application: identify municipality, zoning district analysis, Act 537 sewage service verification, utility coordination.
2. Municipal zoning review or conditional use / special exception.
3. Subdivision and Land Development Plan to municipality with CCPC advisory review.
4. Act 537 Planning Module if required.
5. CCCD E&S and NPDES review.
6. PADEP review for Chapter 102 post-construction, NPDES, Chapter 105 (waterway encroachment where applicable).
7. PennDOT HOP for state road access.
8. Municipal building permit applications.
9. Third-party or L&I UCC review (depending on municipal arrangement).
10. Inspections.
11. Certificate of Occupancy.

What this means on site

Three practical rules for Chester County:

• Municipality is everything — zoning, SLDO, and building permit authority vary by township or borough. Identify the specific municipality first.
• CCCD is the stormwater gate — plan review through the Conservation District runs in parallel with municipal site plan review.
• Act 537 is often critical-path — sewage planning module approval can delay projects by months; start at pre-application.

Chester County's 73 municipalities plus PA's uniform code plus county advisory planning plus Conservation District delegation produces a permit environment that is local-authority-heavy, advisory-county-lighter, and state-rule-heavier. It is distinctive among Mid-Atlantic counties and markedly different from Maryland or Virginia county structures.

Primary sources for this essay: PA Uniform Construction Code (Act 45 of 1999); PA Municipalities Planning Code (Act 247 of 1968, as amended); PA Sewage Facilities Act (Act 537 of 1966); PA Clean Streams Law and Chapter 102 (Erosion and Sedimentation) / Chapter 105 (Waterway Encroachment); Chester County Subdivision and Land Development Ordinance (as applicable in advisory context); Landscapes3 (2018 Chester County Comprehensive Plan). Chester County Planning Commission and Chester County Conservation District are the county-level resources; municipal zoning and building code authorities vary by jurisdiction.