Zoning, building permits and septic rules in Upper St. Clair Township, Pennsylvania

Upper St. Clair Township’s own rules

• Local zoningPresent (with conditions)

  Land inside Upper St. Clair township's limits is governed by the township's own zoning ordinance, Chapter 130 of the Township Code.

  • The township code page states the code 'has been updated as of december 31, 2025' and that later changes must be checked by calling the township.
  • Ordinance 2283, adopted by the Board of Commissioners on August 3, 2026 per the township legal notice, amends Chapter 130 to define a tobacco/vape shop as a conditional use in the C3 regional shopping center district.
  • Zoning amendments are adopted by township ordinance and full text is kept at the Township Manager's office, 1820 McLaughlin Run Road.

  “chapter 130 zoning chapter 130.1-130.2 preliminary provisions chapter 130.3 definitions”

• Zoning districtsPublished (with conditions)

  Zoning districts inside Upper St. Clair township's limits, Chapter 130 of the Township Code.

  • The published district list includes R1 single family residential, R2 suburban residential, R3 medium density residential, R4 low-rise multifamily, R5 multifamily, SB special business, C1 neighborhood commercial, C2 highway commercial, C3 regional shopping center, RM restricted light industrial and RM-P planned residential districts.
  • The township page does not show an agricultural or rural-residential district in the portion read; the full district list was not confirmed.

  “chapter 130.8 r1 single family residential district chapter 130.9 r2 suburban residential district”

Rules another office applies inside Upper St. Clair Township

Upper St. Clair Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

• Building permitLimited

  Plumbing work (new installation or alteration) in Allegheny County, which the county states is issued under its Article XV plumbing code. Whether this covers all land inside Upper St. Clair township was not confirmed on a township page.

  • Limited to plumbing; this is not a general building permit.
  • Plumbing plans must be approved by the health department before plumbing work starts.
  • Fee schedule is a county PDF (effective 1/1/2023) that was not opened.

  “residential and commercial plumbing projects require a plumbing permit.”

• InspectionsLimited

  Plumbing work covered by a county plumbing permit inside Upper St. Clair township; not a general building inspection.

  • Inspection is conducted as work proceeds and a final inspection is required on all plumbing permits.

  “a final inspection is required as part of all plumbing permits issued.”

• Who permits septicCounty (with conditions)

  On-lot (septic) sewage systems on private land inside Upper St. Clair township, administered by the Allegheny County Health Department sewage enforcement officers under PA Act 537. Recorded at health-district level because the schema does not permit a county record with township-specific geography.

  • The county page describes the county's role generally; it does not expressly name Upper St. Clair township, so applicability to the township is inferred from the county-wide program and was not confirmed on a township page.
  • Public sewer connections are a separate question (see utility_connection), and the township's own sewer system is maintained by the township.

  “permitting activities for these systems are carried out by the health department's sewage enforcement officers under pa act 537-the pa sewage facilities act.”

• Septic permitRequired

  Installing a new on-lot (septic) sewage system on private land inside Upper St. Clair township, through the Allegheny County Health Department.

  • The county sewage enforcement officers conduct on-site soil testing and review and approve on-lot system designs before issuing permits.
  • Permit fee is set by the county on-lot fee schedule (PDF, not opened).

  “our sewage enforcement officers conduct on-site soil testing for private on-lot sewage treatment systems, as well as review and approve on-lot system designs and issue permits on the pa dep approved septic systems.”

• Permit processPartial

  Plumbing permit process through the Allegheny County Health Department; the township's own building permit process was not confirmed.

  • Plans are filed online through the county citizen access portal or in person at the Pittsburgh office.

  “all types of plumbing permits and plans can be filed online through the citizen access portal.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Upper St. Clair Township or Allegheny County directly.

• Owner-builder exemption — Owner-builder exemption for residential construction inside Upper St. Clair township.
• Building code adopted — Building code adoption inside Upper St. Clair township.
• Certificate of occupancy — Certificates of occupancy inside Upper St. Clair township.
• Minimum dwelling size — Minimum dwelling size in the R1 single family residential district (Chapter 130.8) of Upper St. Clair township; agricultural district status unconfirmed.
• Minimum lot size — Minimum lot size in the R1 single family residential district (Chapter 130.8) of Upper St. Clair township.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.