Accessory Structures in Guadalupe County, TX (2026)
3 rules for unincorporated Guadalupe County, Texas.
Verified from official government sources
ADU Rules
Texas counties cannot zone, so unincorporated Guadalupe County sets no ADU size, setback, or occupancy limit. An accessory dwelling with plumbing requires an on-site sewage (OSSF) permit under Health & Safety Code Chapter 366.
Guadalupe County ADU / Accessory Dwelling Rules
Light RestrictionsTex. Health & Safety Code §366.051(a)
A person must hold a permit and an approved plan to construct, alter, repair, extend, or operate an on-site sewage disposal system.
Garage Conversions
Unincorporated Guadalupe County neither zones nor permits garage conversions. Converting a garage into living space with a bathroom triggers an on-site sewage (OSSF) review under Health & Safety Code Chapter 366.
Guadalupe County Garage Conversion Rules
Few RestrictionsTex. Health & Safety Code §366.051(a)
A person must hold a permit and an approved plan to construct, alter, repair, extend, or operate an on-site sewage disposal system.
Tiny Homes
A tiny home on wheels is titled as a travel trailer under Texas Transportation Code Section 501.002 and is not used as a permanent dwelling. A tiny home on a foundation with plumbing needs an OSSF septic permit.
Guadalupe County Tiny Home & Small Dwelling Rules
Few RestrictionsTex. Transp. Code §501.002(30)
is designed primarily for use as temporary living quarters in connection with recreational, camping, travel, or seasonal use; ... is not used as a permanent dwelling
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