Accessory Structures in Richardson, TX: What Residents Actually Need to Know

If you live in Richardson or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Richardson has 5 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

Garage Conversions

Garage conversions in Richardson require a building permit from Building Inspection. The converted space must meet all residential building codes including egress, electrical, plumbing, and structural requirements. Loss of required parking spaces may trigger zoning issues.

Key details: Permit: Required. Building Code: IBC 2021 Edition. Parking Impact: Must maintain required parking. Contact: 972-744-4174.

Unpermitted conversions may result in stop-work orders, fines up to $2,000, and an order to restore the garage to its original use.

Carport Rules

Attached carports are allowed with a permit; detached metal carports are restricted and front-yard carports are generally prohibited in Richardson.

Key details: Permit: Building permit required for all carports. Restriction: Freestanding metal/fabric carports generally prohibited in front yards. Materials Must: Materials must match the primary dwelling when in front. Fee: Typical setbacks: 5 feet side, 10 feet rear. Permit: Enclosing carport requires conversion to permitted garage.

Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact [Richardson code enforcement](https://library.municode.com/tx/richardson/codes/code_of_ordinances) directly for current fines, enforcement procedures, and hearing options.

ADU Rules

Richardson's Comprehensive Zoning Ordinance (Appendix A) governs accessory dwelling units. ADUs are subject to the same lot coverage, setback, and height limitations as other accessory structures. Residential zoning districts may restrict secondary dwelling units.

Key details: Authority: CZO (Appendix A). Setbacks: 7 ft side, 3 ft rear, 18 in at alley. Height: 25 ft max (>150 sq ft). Permit: Required for all conversions.

Unpermitted ADUs or conversions may result in code enforcement citations, fines up to $2,000, and orders to restore the structure to its original use.

Shed Rules

A building permit is required for all accessory structures over 40 sq ft. Structures 150 sq ft or less cannot exceed 12 ft in height. Structures over 150 sq ft cannot exceed 25 ft. Total accessory structure area may not exceed 8% of lot area or 40% of the dwelling size.

Key details: Permit Threshold: Over 40 sq ft. Height (≤150 sq ft): 12 ft max. Height (>150 sq ft): 25 ft max. Total Area: ≤8% of lot or 40% of dwelling.

Building without a permit results in citations, potential stop-work orders, and fines up to $2,000. Non-compliant structures may need to be removed.

Tiny Homes

Tiny houses must meet minimum dwelling size and IRC construction standards; RV-style tiny houses on wheels are not allowed as permanent residences.

Key details: Limit: Minimum dwelling size (often 1,000+ sq ft) set by zoning district. Rule: IRC Appendix Q not broadly adopted for small homes. Vehicle: Tiny houses on wheels classified as RVs, not residences. Rule: THOWs may not be permanently occupied. Permit: ADUs not broadly permitted in Richardson.

This is not one of those rules that cities tend to ignore. Richardson actively enforces its tiny homes requirements.

The Bottom Line

Richardson's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Richardson is broadly strict or permissive.

These rules come from Richardson's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.