Pennsylvania ADU Laws & Rules (2026)

Compare ADU zoning rules across 1 Pennsylvania cities. Average ADU score: 4.0/10.

Avg Score: 4.0/101 Cities

Key Pennsylvania ADU Laws

Pennsylvania ADU Overview

  • 1 cities currently covered with detailed ADU zoning data
  • Average ADU-friendliness score: 4.0/10
  • Rules vary by city — check individual city pages for details
  • We're actively expanding coverage in Pennsylvania

Pennsylvania Cities ADU Comparison

CityMax SizeSetbacksPermit FeesBuild Cost1BR RentScore
Pittsburgh 1200 sq ft (proposed; not yet adopted) Varies by zone; typically 20-30 ft $1,350+ for building permits (variable by jurisdiction) $200,000-$325,000 $900-$1,300 4/10

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