Zoning, building permits and septic rules in Mercer Township, Pennsylvania

Mercer Township’s own rules

• InspectionsLimited

  Buildings inside Mercer Township.

  • The published requirement applies to buildings over 1,000 square feet.

  building area threshold: > 1000 sq ft

  “Inspections are required for buildings over 1,000 sq ft.”

• Local zoningAbsent

  Land inside Mercer Township, Butler County, Pennsylvania.

  • The Township states that it follows the Butler County Subdivision and Land Development Ordinance (SALDO).

  “Mercer Township does not have a Zoning Ordinance.”

• Zoning districtsNot published

  Zoning districts for land inside Mercer Township.

  • Mercer Township states that it follows Butler County SALDO for subdivision and land development.

  “Mercer Township does not have a zoning ordinance.”

• Minimum dwelling sizeNone

  Dwelling size inside Mercer Township, as a zoning dimensional-control matter.

  • This finding addresses zoning only; building-code requirements may still apply.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Minimum lot sizeNone

  Lot size inside Mercer Township, as a zoning dimensional-control matter.

  • Butler County SALDO requirements may apply to subdivisions and land development.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• SetbacksNone

  Setbacks inside Mercer Township, as a zoning dimensional-control matter.

  • This finding addresses zoning only; other applicable rules may impose site constraints.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Lot coverageNone

  Lot coverage inside Mercer Township, as a zoning dimensional-control matter.

  • This finding addresses zoning only; other applicable rules may impose site constraints.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Building heightNone

  Building height inside Mercer Township, as a zoning dimensional-control matter.

  • This finding addresses zoning only; building-code and other applicable requirements may still apply.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Living in an RVUnrestricted

  RV occupancy on land inside Mercer Township, as a zoning-land-use matter.

  • This finding addresses the Township's zoning-land-use regulation only; building, sewage, subdivision, and other non-zoning rules may still apply.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Camping on your landUnrestricted

  Temporary camping on land inside Mercer Township, as a zoning-land-use matter.

  • This finding addresses the Township's zoning-land-use regulation only; building, sewage, subdivision, and other non-zoning rules may still apply.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Tiny homesUnrestricted

  Tiny-home occupancy inside Mercer Township, as a zoning-land-use matter.

  • This finding addresses the Township's zoning-land-use regulation only; building, sewage, subdivision, and other non-zoning rules may still apply.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Manufactured homesUnrestricted

  Manufactured-home occupancy inside Mercer Township, as a zoning-land-use matter.

  • This finding addresses the Township's zoning-land-use regulation only; building, sewage, subdivision, and other non-zoning rules may still apply.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Accessory dwellingsUnrestricted

  Accessory dwellings inside Mercer Township, as a zoning-land-use matter.

  • This finding addresses the Township's zoning-land-use regulation only; building, sewage, subdivision, and other non-zoning rules may still apply.

  “Mercer Township does not have a Zoning Ordinance. We follow the Butler County Subdivision and Land Development Ordinance (SALDO).”

• Permit feesPublished (with conditions)

  Township building permits inside Mercer Township.

  • CCI charges a separate fee when all inspections are completed.

  Township building permit fee: 25 USD (CCI will charge its fee separately when all inspections are completed.)

  “BUILDING PERMITS FOR THE TOWNSHIP ARE $25.”

• Permit processPublished (with conditions)

  Township building-permit applications inside Mercer Township.

  • The applicant is directed to contact the Township office for an appointment after completing paperwork.

  “PLEASE CONTACT THE TOWNSHIP OFFICE FOR AN APPOINTMENT AFTER COMPLETING ALL THE PAPERWORK. THE TOWNSHIP PERMIT OFFICER MUST REVIEW, SIGN, AND FORWARD ALL COMPLETED FORMS TO CCI.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Mercer Township or Butler County directly.

• Owner-builder exemption — Owner-built residential construction inside Mercer Township.
• Building code adopted — Construction inside Mercer Township, Butler County, Pennsylvania.
• Certificate of occupancy — Occupancy of structures inside Mercer Township.
• Who permits septic — On-lot sewage facilities inside Mercer Township.
• Septic permit — On-lot sewage installation or repair inside Mercer 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.