Do Driveways, Patios, Shed Pads, Hot Tub Pads & Retaining Walls Need Permits?

Permit requirements depend on the specific project category, whether public right-of-way or structural elements are involved, property jurisdiction, and site-specific conditions. Some ground-level flatwork on private land proceeds without building permits, while work touching public streets, supporting structures, or retaining soil requires formal review.

Project Permitting Summary Matrix

Driveway concrete work falls into three distinct permitting scenarios:

1. Replacing an Existing Private Driveway

Removing and replacing an existing residential concrete driveway within its current footprint on private land generally does not require a building permit in Montgomery County or Gaithersburg. However, construction equipment must not block public sidewalks or damage street curbs without proper right-of-way protection.

2. Driveway Apron Construction & Restoration

The driveway apron sits within the public right-of-way strip between the property line and the street gutter. Replacing or widening an apron requires a Right-of-Way Driveway Permit from either Montgomery County DPS or the City of Gaithersburg, depending on road jurisdiction.

3. Driveway Widening & Extensions

Adding wide concrete parking extensions alongside an existing driveway requires verifying local zoning setbacks and maximum front-yard impervious lot coverage limits before pouring.

Backyard flatwork involves specific municipal and environmental guidelines:

Concrete Patio Permits

In the City of Gaithersburg, building permits ARE explicitly required for patios that alter existing lot drainage patterns. In unincorporated Montgomery County, unroofed ground-level patios generally do not require building permits, but must comply with yard setback limits and green space coverage rules.

Shed Pads & Storage Building Slabs

While a ground-level concrete slab alone may not require a standalone flatwork permit, the accessory building or shed constructed on top of it frequently requires a Residential Shed Permit if it exceeds size thresholds (typically over 200 sq ft or involving utility connections).

Gazebo, Pergola & Outdoor Kitchen Pads

Foundations for heavy masonry outdoor kitchens or structural pergolas carrying overhead roofs require building and trade permits (electrical, gas) independent of the underlying concrete pad.

Pre-Construction Checklist

• Confirm Property Jurisdiction: Determine whether your address falls under City of Gaithersburg or Montgomery County DPS authority.
• Identify Property Boundaries: Locate property stakes or obtain a property boundary survey to avoid building over property lines.
• Check Right-of-Way Limits: Ensure driveway apron, curb, or sidewalk work is identified for ROW permitting.
• Verify Trade Permits: Ensure separate trade permits (electrical, gas) are pulled by licensed subcontractors when installing hot tubs or generators.
• Consult Permitting Agencies: When in doubt, contact City Permitting at 301-258-6330 or County DPS via MC311 (240-777-0311).