How Matthews Handles Accessory Structures: A Practical Guide
Matthews maintains 113 local ordinances across all categories, and 5 of those deal specifically with accessory structures. Here is a breakdown of what the city actually requires, what is prohibited, and where Matthews falls on the strict-to-permissive spectrum compared to other cities.
Shed Rules
Sheds under 12x12 (144 sq ft) typically do not need a building permit in Matthews but still must meet UDO setbacks. Larger sheds require permits and anchoring per NC Code.
Key details: No Permit: Under 144 sq ft. Setbacks: 5-10 ft side/rear. Permit: Over 144 sq ft. Electric: Always requires permit.
Contact your local code enforcement office for specific penalty information.
Carport Rules
Matthews allows attached and detached carports subject to UDO setbacks and building permits. Metal prefab carports are permitted if anchored and meeting wind load standards.
Key details: Permit: Required always. Setbacks: Accessory standards. Anchoring: Concrete required. HOA: May restrict.
Contact your local code enforcement office for specific penalty information.
ADU Rules
Matthews permits accessory dwelling units in certain residential districts subject to UDO standards. ADUs must be subordinate in size, meet setbacks, and match the main home aesthetic.
Key details: Zoning: Permitted in specified districts. Size: Subordinate to main home. Occupancy: Owner-occupy typical. Permit: UDO and building required.
Unpermitted ADU construction: stop-work order, code enforcement action, possible removal at owner expense.
Tiny Homes
Tiny homes on foundations must meet NC Residential Code and Matthews zoning minimum dwelling size. Tiny homes on wheels are treated as RVs and cannot be permanent residences on residential lots.
Key details: Foundation: Treated as house. On Wheels: RV classification. Permanent: Not allowed on residential lot. Alternative: ADU pathway.
Occupying a THOW as permanent residence: zoning violation, civil penalties, eviction possible after hearing.
This is not one of those rules that cities tend to ignore. Matthews actively enforces its tiny homes requirements.
Garage Conversions
Converting a garage to living space in Matthews requires a building permit, plan review, and may require zoning compliance for parking and density. Unpermitted conversions create resale and insurance issues.
Key details: Permit: Required always. Parking: Must still meet minimum. Code: NC Residential Code. ADU: If separate unit.
Unpermitted conversion: stop-work order, civil penalties, retroactive permitting with inspection fees, or forced reversal to garage use.
Compared to other cities, Matthews takes a harder line on garage conversions. The enforcement and penalty structure reflects that.
The Bottom Line
Matthews is tougher than many cities when it comes to accessory structures. Out of the 5 rules covered here, 2 are rated strict. If you are a homeowner, renter, or business owner in Matthews, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.
This guide is based on Matthews's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.