Grass height in Fairfax County is regulated by Chapter 119 - Vegetation, of the Code of the County of Fairfax Virginia and generally, grass height may not exceed 12 inches.

For Developed Residential Property

It is unlawful for any owner of any developed residential lot or parcel which is less than one-half acre (21,780 square feet) to permit the growth of any grass or lawn area to reach more than 12inches in height/length.

For Undeveloped Residential Property

It is unlawful for any owner of any undeveloped residential lot or parcel which is less than one-half acre (21,780 square feet) and which is located within a recorded subdivision where ninety percent (90%) of the lots have been developed to permit the growth of any grass or lawn area to reach more than 12 inches in height/length.

For Commercial/Industrial Property

It is unlawful for any owner of any vacant developed commercial/industrial property to permit any growth of any grass or lawn area of more than 12 inches in height/length.

For Residential Lots Greater than One-half Acre in Area

An informational warning letter asking for the grass to be mowed to a height less than 12 inches will be sent to the property owner; however, no violation can be issued.

Exemptions

Exemptions from the provisions of Chapter 119 are detention ponds; rights-of-way through residential, commercial, and industrial properties; park lands; and conservation and scenic easements approved by Fairfax County.