Retaining Wall

A retaining wall is a structure designed and constructed to resist the lateral pressure of soil when there is a desired change in ground elevation that exceeds the angle of repose of the soil.  Every retaining wall supports a “wedge” of soil. The wedge is defined as the soil which extends beyond the failure plane of the soil type present at the wall site, and can be calculated once the soil friction angle is known.  As the setback of the wall increases, the size of the sliding wedge is reduced. This reduction lowers the pressure on the retaining wall.  The most important consideration in proper design and installation of retaining walls is to recognize and counteract the tendency of the retained material to move downslope due to gravity. This creates lateral earth pressure behind the wall which depends on the angle of internal friction (phi) and the cohesive strength (c) of the retained material, as well as the direction and magnitude of movement the retaining structure undergoes.  The International Building Code requires retaining walls to be designed to ensure stability against overturning, sliding, excessive foundation pressure and water uplift; and that they be designed for a safety factor of 1.5 against lateral sliding and overturning.  Unless the wall is designed to retain water, It is important to have proper drainage behind the wall in order to limit the pressure to the wall's design value. Drainage materials will reduce or eliminate the hydrostatic pressure and improve the stability of the material behind the wall. Drystone retaining walls are normally self-draining.
Retaining Wall N

Application and Supporting Documents


Permit Applications must be entered online.

 

Who Can Apply


  • Owner: Property Owner name must match Maryland State Assessment records or Proof of Ownership must be submitted. Proof of Ownership: Deed and Deed Recording Receipt from Clerk of the Circuit Court for Prince George's County.
  • Agent: Applicants that are not the property owner or MHIC contractor must submit the following document:
    Homeowner Improvement Authorization Letter (PDF) 
  • Contractor: Must have Maryland Home Improvement Commission license

Plans and Drawings Requirements 


 

Processing and Reviewing Agencies

Walk-Thru
Bring 3 copies of the entered online application, necessary support documents, and required plans and drawings to the Permit Center.
Processing Review Agency Flow Chart Fence
ePlan
Select "eplan" on the online application and upload required documents.

Fees


Minimum Fee: $90.00
Fee Calculation (if higher than minimum): $50 + Construction Cost x 0.008 x BVD x Sq. Ft. + Grading Fee + $5 (M–NCPPC)
All permitting fees are assessed an additional five percent (5%) Technology Fee. Fees are subject to change based on County codes. 
 

Permit*


Following agencies' approval of plans/drawings and payment of fees, a permit is issued. A permit may be revoked if issued in error. A permit may be void if construction has not started, has been suspended or discontinued.

Modifications to the permit, plans, or drawing require a Permit Revision. Permit Revision applications cannot be entered online. The revised application, plans and drawings must be submitted in the Permits Center, using the following two forms: 
 
If approved, permits that expire or require more time to complete, may be renewed or extended by using the following form. 
   

Inspections


Inspections must be requested and conducted at least once every six months. Visit our Inspections Division pages to schedule an inspection.

*Note:
  • A retaining wall that is less than 2 feet tall does not require a permit.