Planning, Permitting and Construction

Fairfax County, Virginia

CONTACT INFORMATION: 8 a.m. - 4:30 p.m. Permitting Business Hours: 8 a.m. - 4 p.m. (M-Th), 9:15 a.m. - 4 p.m. (F)

TTY 711

12055 Government Center Parkway
Fairfax, VA 22035

Multiple Development Agency Directors,

Submitting House Location Plats



View of plat
 Click for larger view
House location plats show the location of structures on an individual property. Submit a house location plat during the building permit application process for projects disturbing less than 2,500 square feet of land.


House location PLATS must:

  • Be clear and legible.
  • Show the entire parcel, and show all property line bearings and distances.
  • Be drawn to a designated scale no larger than 1” equals 50’.
  • Show existing and proposed structures properly identified, accurately located and dimensioned and drawn to the designated scale.
  • Be signed and sealed by a licensed professional in accordance with Virginia Administrative Code 18VAC10-20-380

See Technical Bulletin 18-02 for more detailed information on House Location Plat Surveys.

Measure Tool

Use the Measure Tool to ensure your plat is to scale!

What does "to scale" mean?

A scaled item retains the original scale indicated by the surveyor of the plat. Here are some things to consider to ensure your plat scales correctly:  

  1. The best place to start is with the plat document itself, not a picture of it, photocopy or a version that has potentially been skewed.  

  1. Next, the proposed work must be drawn onto the plat to the scale indicated, by either using an engineer’s scale, ruler or digital software. The document itself must be to scale as well as the structure being proposed.

  2. The document is scanned in (made digital) to the original size document. Example:  the size paper of your plat is 8 ½" x 14" so you need to scan it to 8 ½" x 14" and not 8 ½" x 11" or another size. By scanning the document correctly, you will not lose the scale.

Surveys that have been photographed, scanned on a phone app, faxed, reduced, enlarged, or otherwise altered may not be accepted if they are not typically to scale and have poor resolution and lack of detail. 


  • Include disturbed area limits (see Calculating Disturbed Area graphic).
  • Elevation/height of structure is required to be listed within the construction documents.
  • If there is flood plain present on your property, it must be shown on the plat.

Calculating Disturbed Area

Add the area of project footprint
10-foot work zone around all sides of project footprint
Area of stockpile footprint (when project includes excavation)
10-foot-wide access path from street/driveway to edge of project

Before you dig, find out more about land disturbance 101


  • Plat is not “to scale” per listed scale on plat
  • The proposed structure must be drawn to the listed scale
  • Plat cannot include verbiage prohibiting its use for construction purposes
  • Plat that has been previously used for construction purposes cannot be reused
  • Plat must contain signature and seal of licensed professional
  • Plat must match current footprint of all existing structures on the property
  • Topography or wall check is not acceptable
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