ADUs are allowed in RichmondTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Richmond, TX
Is your property eligible for an ADU?
# of Properties
2,813
Owner-occupied
64%
Zoning districts
11
Avg Home Value
$199,910
Median Lot Size
0.16 acres
Avg Income
$60,308
Residential Types:
2,813 housing units
Residential Interior
100%
Zoning Districts:
3,861 parcels · 11 districts
GR
74%(2,841)
OT
11%(442)
GC
3%(132)
NZ
2%(91)
Other
9%(355)
ADU Rules
What can you build in Richmond, TX?
Richmond, TX follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 25% of the principal building’s gross floor area
Detached ADU Size Limits
- –Maximum detached ADU size: one-story = the smaller of 7.5% of lot area or the larger of 25% of the main home’s gross floor area and 1,200 sq ft; two-story = 600 sq ft.
Max Units
- –Single-family detached: 1 ADU per lot (attached or detached).
- –Duplex/multifamily/other principals: 0 (not permitted).
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –1 space/ADU (off-street) in addition to parking for the principal dwelling; no max; tandem parking allowed to meet ADU requirements, but only 1 tandem space per lot.
Rental Restrictions
- –Old Town (OT) district ADUs: short-term rentals (<30 days) prohibited.
ADU State Law
What can you build in Texas?
- –Texas does not have a statewide ADU law. ADUs are regulated entirely at the local level.
- –ADU rules vary significantly by city, and many jurisdictions prohibit ADUs outright.
- –Counties generally lack zoning authority, but other restrictions may still apply outside city limits.
- –Outside city limits, ADU feasibility often depends on subdivision rules, deed restrictions, and septic or fire requirements.
- –Building/fire codes are set statewide, but whether an ADU is allowed is local zoning.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Texas municipalities
Rules change at the town line. Check the municipality your property is actually in.
Fort Bend County