Harford County, MD Fence Regulations: Retaining Walls (2026)
Key Facts
- Permit trigger height
- 4 feet or greater
- Permit type
- Zoning certificate, § 267-27C(6)(f)
- Zoning certificate fee
- $30 flat
- Building-permit wall fee
- $2/lineal ft + $100-$200
- Setback
- 3 ft residential, 10 ft agricultural
- Max fine
- $500 per day
Summary
Harford County requires a zoning certificate for any retaining wall 4 feet or taller under § 267-27C(6)(f) of the zoning code. Walls needing structural review carry a building permit fee of $2 per lineal foot plus a $100 (residential) or $200 (commercial) application fee under § 157-16A, while a standalone retaining wall zoning certificate runs a flat $30.
Retaining walls, 4 feet or greater in height, shall require a zoning certificate. ... A wall that is constructed to hold a mass of earth in place or prevent erosion of an embankment. ... Retaining wall $30. Retaining wall (building permit required) Commercial: $2.00 per lineal foot plus 200 non-refundable application fee residential: $2.00 per lineal foot plus $100 non-refundable application fee.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4988582; v46 updated 2026-06-09; through 06-09-2026).
Full Breakdown
' Under § 267-27C(6)(f), any retaining wall 4 feet or greater in height requires a zoning certificate from the Department of Planning and Zoning before it can be built. 00 per lineal foot plus a $100 non-refundable application fee for a residential wall or $200 for a commercial wall. The grading provisions of Chapter 214 independently require a retaining wall whenever a cut or fill slope cannot meet the standard grade transition to an adjoining property, and that wall must be built entirely on the land of the owner doing the grading and requires its own building permit.
As with all accessory structures, a retaining wall must also respect the setback rules of § 267-27C(6): a minimum of 3 feet from side or rear lot lines on a residential lot, or 10 feet on an agricultural lot, unless a recorded easement changes that distance.
Violations & Fines
Building a retaining wall 4 feet or taller without a zoning certificate violates § 267-27C(6)(f). The Director of Planning may order the wall's owner to abate the violation under § 267-14A; continuing the violation is a misdemeanor fined up to $500 for each day it persists under § 267-14B, and the County may instead issue a civil citation of up to $500 per violation under § 1-23A(1).
Frequently Asked Questions
Do I need a permit to build a retaining wall in Harford County?
How much does a retaining wall permit cost?
How close to my property line can a retaining wall sit?
Sources & Official References
Other rules in Harford County
Compare Harford County to another location·View the Maryland fence regulations overview
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