ADUs are allowed in ProsperTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Prosper, TX
Is your property eligible for an ADU?
# of Properties
84
Owner-occupied
27%
Zoning districts
103
Avg Home Value
$15,349
Median Lot Size
0.39 acres
Avg Income
$201,105
Residential Types:
84 housing units
M4
100%
Zoning Districts:
3,505 parcels · 103 districts
SF-15
23%(800)
SF/PD-1
14%(508)
SF-10/PD-2
14%(497)
SF-10
9%(323)
Other
39%(1,377)
ADU Rules
What can you build in Prosper, TX?
Prosper, 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
Detached ADU Size Limits
- –Maximum size for a detached guest house: up to 50% of the primary home’s dwelling area, but no more than 2,000 sq ft.
Max Units
- –Guest House (attached or detached): 1 per lot or tract
- –Residential Garage Loft: 1 per lot or tract
Owner Occupancy
- –Owner-occupancy not required for ADUs.
Parking
- –No ADU-specific parking; general residential rules apply: SF/DTSF/TH/2F districts require 2 enclosed spaces and 2 paved stacking spaces behind the front line, on the same lot; no extra ADU requirements.
Rental Restrictions
- –ADUs (guest houses, garage apartments) shall not be rented, leased, or sublet.
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.
Collin County