Tiny home rules in Bucks County, PA — covering tiny houses on wheels (THOWs), park model RVs, and tiny home on foundation builds — determine where they are legal and how they get permitted.
Bucks County regulates tiny homes under the PA UCC based on construction type. Foundation-built tiny homes must meet IRC including Appendix AQ for homes under 400 sq ft. Tiny homes on wheels are classified as RVs.
Bucks County tiny home regulation follows the PA Uniform Construction Code. Foundation-built tiny homes are treated as single-family dwellings subject to IRC standards; Appendix AQ (adopted in PA) provides specific provisions for homes 400 sq ft and under including reduced ceiling height in lofts (minimum 6'8" main, 36" in sleeping loft), ladder/alternating tread device access, and emergency egress. Most Bucks townships have minimum dwelling size requirements in residential zones (typically 700 to 1,200 sq ft), which may preclude tiny homes outside of ADU-permitted zones or require variances. Tiny Homes on Wheels (THOW) are classified as RVs under PA Vehicle Code, not permanent dwellings, and may only be occupied as permitted residences in RV parks or campgrounds licensed under 34 Pa. Code Ch. 141. ADU ordinances in some townships (Doylestown Township, Lower Makefield) provide a path for tiny homes as secondary dwellings on existing lots.
Occupying THOW as permanent residence outside permitted RV park: zoning violation with fines $200 to $1,000 per day. Foundation tiny home below minimum dwelling size: variance required or removal ordered. Unpermitted utility connections: UCC fines and correction.
Bucks County, PA
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See how Bucks County's tiny homes rules stack up against other locations.
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