Key Facts Ordinance Text Full Breakdown Violations FAQ Sources More in Lower Paxton

Lower Paxton, PA Accessory Structures: ADU Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified October 2026

ADU rules in Lower Paxton, PA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Definition: Separate accessory living space, attached or detached
Building permit: Application required for any additions or alterations
Occupancy: Certificate of use and occupancy application required
Inspections: All inspections required by the Codes Department
Tiny house floor area: 749 square feet or less habitable area
Civil penalty: Not more than $500 plus costs, each day separate

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Pennsylvania under recent ADU streamlining laws. The Lower Paxton, PA rules below cover local size, height, and setback requirements.

Summary

In Lower Paxton Township, Dauphin County, Pennsylvania, an accessory dwelling unit is a separate living space attached to or detached from the primary dwelling. Section 203-314(A) requires a building permit application for any additions or alterations, an application for a certificate of use and occupancy, and every inspection the Codes Department requires.

A. Accessory dwelling units. (1) Any additions or alterations require application for building permit and associated inspections. (2) Completion of an application for certificate of use and occupancy. (3) All inspections that are required by the Codes Department.

View official code

Full Breakdown

The Lower Paxton Township zoning chapter defines an accessory dwelling unit in § 203-202 as a separate and accessory living space that is attached or detached to the primary dwelling. Attached units typically include living, sleeping, kitchen, and bathroom facilities accessed from a lockable entrance door. Section 203-314(A) then sets three process requirements: any additions or alterations require an application for a building permit and the associated inspections, the owner must complete an application for a certificate of use and occupancy, and all inspections required by the Codes Department must be passed.

The Table of Authorized Accessory Uses and Structures in § 203-312 lists accessory dwelling units, and the row prints only P entries, which the table key defines as permitted use by right. It prints no SE (special exception) or CU (conditional use) entries for this use.

Related definitions matter for how a unit is classified. A flex flat is a portion of a carriage house usable as an accessory dwelling unit by right, and before the Zoning Officer issues a certificate of occupancy the owner must present evidence of recording a document in a form acceptable to the Township that limits the use and occupancy of the flex flat. A conversion dwelling is defined separately from accessory dwelling units and in-law suites, which are primarily intended to house family members. A tiny house is a single-family dwelling unit for occupancy as either a principal or accessory dwelling unit with habitable floor area of 749 square feet or less, built on a foundation or on wheels.

General accessory standards in § 203-313 still apply. An accessory structure attached to the principal structure is part of the principal structure under § 203-313(B). Detached accessory structures stay out of the required front yard and sit five feet from side and rear lines under § 203-313(C), count toward maximum lot coverage under § 203-313(E), and cannot exceed the height of the principal structure under § 203-313(H) unless agricultural. Sheds, accessory garages, and storage buildings each carry a rule that no part can be occupied as a residential living area, so those buildings cannot be the unit.

Violations & Fines

Under § 203-1205(B)(1), failing to secure a zoning permit before a change in use of a structure or the erection or alteration of any structure is a violation. Starting work before the permit doubles the permit fee under § 203-1202(K). The Zoning Officer issues an enforcement notice with a compliance deadline and 30 days to appeal to the Zoning Hearing Board, and a civil judgment is not more than $500 plus court costs and attorney's fees, with each day a separate violation.

Frequently Asked Questions

What steps does Lower Paxton Township require to add an accessory dwelling unit?

Section 203-314(A) requires an application for a building permit for any additions or alterations, with the associated inspections, plus an application for a certificate of use and occupancy and all inspections required by the Codes Department. A zoning permit is also needed under § 203-1202(A) for the erection or alteration of a structure.

Is an accessory dwelling unit allowed by right in Lower Paxton Township?

The accessory use table in § 203-312 prints P, permitted use by right, for accessory dwelling units, with no special exception or conditional use entries in that row. The unit still needs the building permit, certificate of use and occupancy application, and inspections that § 203-314(A) requires.

Can I convert a shed or garage into an accessory dwelling unit?

No. Section 203-314(H)(1) bars residential living area in any part of a shed, § 203-314(C)(2) bars it in any part of an accessory garage, and § 203-314(J)(2) bars it in an accessory storage building. A dwelling unit needs to be created through the § 203-314(A) permit process.

Can an accessory dwelling unit be detached from the house?

Yes. Section 203-202 defines an accessory dwelling unit as a separate and accessory living space that is attached or detached to the primary dwelling. A flex flat in a carriage house is one detached example the code names, and it requires a recorded document limiting use and occupancy before a certificate of occupancy issues.

Sources & Official References

[1]Lower Paxton Township Code, Chapter 203 Zoning (eCode360)

Other rules in Lower Paxton

Shed & Carport RulesSome Restrictions Parking Rules: RV & Boat ParkingSignificant Restrictions Garage ConversionsSignificant Restrictions Noise Ordinances: Aircraft NoiseFew Restrictions Parking Rules: Commercial & Oversized VehiclesSignificant Restrictions Parking Rules: EV ChargingSome Restrictions Parking Rules: Loading ZonesSome Restrictions Fence Regulations: Material RestrictionsSome Restrictions

All Lower Paxton rules

How Lower Paxton compares: Easiest Cities to Build an ADU·Compare Lower Paxton to another location·View the Pennsylvania accessory structures overview

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.