ADU Rules: Fulshear vs Katy
How do adu rules rules compare between Fulshear, TX and Katy, TX?
Fulshear and Katy have similar restriction levels.
Fulshear, TX
Fort Bend County
Fulshear regulates accessory dwelling units through its Coordinated Development Ordinance, requiring permits, zoning compliance, and conformance with district setback and lot coverage standards before construction or occupancy.
View full Fulshear rules →Katy, TX
Fort Bend County
Katy's Zoning Ordinance defines an Accessory Dwelling Unit as a unit accessory to a principal single-family residence, used only by family members, guests, or employees working within the residence; commercial use is prohibited.
View full Katy rules →Key Facts Comparison
| Fact | Fulshear | Katy |
|---|---|---|
| Governing Code | Coordinated Development Ordinance | - |
| Permit Required | Yes, before construction | - |
| Building Code | 2015 IRC adopted | - |
| Department | Building Services | - |
| Allowed Use | - | Family, guests, employees only |
| Commercial Use | - | Prohibited |
| Utilities | - | Single metering with main house |
| Kitchen/Bath | - | Allowed |
| Separate Entrance | - | Allowed |
| Permit Contact | - | 281-391-4830 |
Highlighted rows indicate differences between cities.
Fulshear FAQ
Do I need a permit to build an ADU in Fulshear?
Yes. Any new construction, including accessory dwelling units, requires a permit from the Fulshear Building Official before work starts, plus zoning verification.
Where do I apply for ADU approval?
Applications go through the Fulshear Development Services / Building Services Department. Staff reviews zoning, setbacks, utilities, and building code compliance before issuing the permit.
Katy FAQ
Can I rent out an ADU in Katy as a separate apartment?
No. Katy's zoning ordinance limits ADU occupancy to family members, guests, or employees working within the principal residence and prohibits commercial use.
Does an ADU need its own electric and water meter?
No. The ordinance requires the principal dwelling and accessory unit to be on single utility metering.
Are ADUs allowed throughout Katy?
Katy's ADU definition is in the citywide zoning ordinance, but subdivision deed restrictions and HOA covenants frequently prohibit ADUs in master-planned communities. Confirm with the Planning Department at 281-391-4803 before building.
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