Garage Conversions: Katy vs Richmond
How do garage conversions rules compare between Katy, TX and Richmond, TX?
Katy and Richmond have similar restriction levels.
Katy, TX
Fort Bend County
Katy requires a building permit for converting a garage to living space under the 2021 IRC and 2023 NEC adopted Jan 1, 2024. Conversions cannot create an unrelated rental unit, and HOA deed restrictions in master-planned subdivisions often prohibit the change.
View full Katy rules →Richmond, TX
Fort Bend County
Richmond requires a building permit for converting a garage to living space under the building codes adopted through the Unified Development Code. Conversions must meet IRC habitable-room standards (egress, smoke alarms, ventilation). Richmond UDC Sec. 5.2.103 limits ADUs to SR, GR, and OT zoning districts, and HOA deed restrictions in master-planned subdivisions often prohibit garage conversions outright.
View full Richmond rules →Key Facts Comparison
| Fact | Katy | Richmond |
|---|---|---|
| Permit | Building permit required | Building permit required |
| Adopted Code | 2021 IRC + 2023 NEC (Jan 1, 2024) | - |
| Trade Permits | Electrical/plumbing/HVAC separately | Electrical/plumbing/HVAC separately |
| Egress | Window required if sleeping room | Window required if sleeping room |
| Rental Use | Prohibited for unrelated tenants | - |
| Permit Contact | 281-391-4830 | Building Dept 281-232-6871 / MGO portal |
| Code Citation | - | UDC Sec. 5.2.103 ADU |
| ADU Districts | - | SR, GR, OT only |
Highlighted rows indicate differences between cities.
Katy FAQ
Do I need a permit to convert my garage to living space in Katy?
Yes. The change of use triggers a residential building permit under the 2021 IRC adopted by Katy effective January 1, 2024, plus trade permits for any electrical, plumbing, or HVAC work.
Can I rent the converted garage as a separate apartment?
No. Katy's Zoning Ordinance Exhibit 14A limits accessory dwelling units to family, guests, or employees working within the residence and prohibits commercial use, including renting to unrelated tenants.
Will my Katy HOA allow a garage conversion?
Many master-planned Katy communities prohibit garage conversions or require architectural review approval. Confirm with your HOA's deed restrictions before applying for a city permit.
Richmond FAQ
Do I need a permit to convert my garage to living space in Richmond TX?
Yes. The change of use triggers a residential building permit through the Richmond Building Department (281-232-6871 / MGO portal), plus trade permits for any electrical, plumbing, or HVAC work, with IRC habitable-room standards required for the new space.
Can I rent the converted garage as a separate ADU in Richmond TX?
Only in SR, GR, or OT zoning districts under UDC Sec. 5.2.103, and only as accessory to a single-family detached principal building. Size is capped (25% / 1,200 sq ft for one-story, 600 sq ft for two-story) and utilities cannot be separately metered.
Will my Richmond TX HOA allow a garage conversion?
Many master-planned Richmond communities like Pecan Grove Plantation, Long Meadow Farms, Briarwood Crossing, and Veranda prohibit garage conversions or require architectural review approval. Confirm with your HOA's deed restrictions before applying for a city permit.
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