Reading, PA Accessory Structures: ADU Rules (2026)
ADU rules in Reading, PA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Default rule
- One dwelling unit per lot
- Accessory conversion
- Barred unless specifically allowed
- Defined term exists
- "Accessory apartment" in definitions
- Where allowed
- Only if a district permits it
Summary
Reading zoning caps most residential lots at one dwelling unit and bars converting a garage or other accessory building into a dwelling unit unless another provision of the chapter specifically allows it.
A lot shall only be occupied by one dwelling unit unless the provisions of this chapter specifically allow two or more dwelling units. This provision shall not limit condominium ownership where the dwellings would be able to meet all of the same dimensional requirements as if fee simple lot lines would be drawn for non-condominium ownership.
D. An accessory building shall not be converted into a dwelling unit unless specifically allowed by this chapter.
E. A new principal building shall not be allowed if the lot only abuts an alley and not a street, unless the applicant proves to the Zoning Hearing Board as a special exception that no other reasonable use of the property is feasible.
F. Unless otherwise stated, each dwelling unit shall be limited to occupancy by one household, which shall meet the definition of one "family" in §
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-8: Current through August 10, 2026).
Full Breakdown
Section 600-902 sets the baseline for accessory-dwelling questions: a lot may be occupied by only one dwelling unit 'unless the provisions of this chapter specifically allow two or more dwelling units,' and an accessory building 'shall not be converted into a dwelling unit unless specifically allowed by this chapter.' The zoning definitions do recognize an 'accessory apartment', a dwelling unit created within part of a principal dwelling or above a garage, but that use must be affirmatively authorized in a district's own use standards before it's allowed; it is not a general by-right option under the chapter's default rule.
Violations & Fines
Converting a garage, basement or other accessory space into a rented or occupied dwelling unit without district use approval and a Zoning Permit is a zoning violation.
Frequently Asked Questions
Can I add an in-law suite above my garage in Reading?
Does Reading zoning define an accessory apartment?
Sources & Official References
Other rules in Reading
How Reading compares: Easiest Cities to Build an ADU·Compare Reading to another location·View the Pennsylvania accessory structures overview
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