Most addition projects in Alexandria's West End start the same way: someone stands in a back yard off Seminary Road or Duke Street, points at the kitchen wall, and says "we could push that out." The drawing that follows is usually a sketch of the room they want. The drawing the City wants first is a different one, and it is worth understanding before anyone spends money on design.
The plat is the first drawing, not the floor plan
Alexandria's residential plan submittal list asks for an electronic survey plat showing the proposed work, drawn to scale, or a grading and site plan in its place. For the Transportation and Environmental Services review, that plat has to be labeled "TES PLAT" and has to show the limits of the disturbed area with a buffer of at least 10 feet around the work. If any part of the work sits within 5 feet of the property line, a neighbor notification letter is required as well.
That has a practical consequence for the sketch in the back yard. Before you decide how deep the new room can go, you need the plat to tell you where the lot line actually is, where the easements run, and how close the existing house already sits to the line. On the postwar lots around Hammond Middle School, where houses were often set generously in the middle of the parcel, there is usually room. On narrower lots closer to Van Dorn Street, the 5-foot letter and the setback often decide the footprint before a designer touches it.
Floor area, open space and the two grades
Alongside the plat, the City asks for a completed floor area ratio and open space calculation form. An addition adds floor area and removes open space at the same time, and the form is where the two are reconciled against what the zoning allows for the lot. The submittal also asks for existing and finished grade information, with the average existing grade indicated on the plans and the building height shown to the average finish grade line. On a sloping West End lot, where the back yard may sit several feet below the front walk, the grade the City measures from is not always the grade you are standing on.
Elevations have to be drawn to scale, and existing and proposed floor plans have to carry room designations and ceiling heights, a door and window schedule, and the location of the electrical panel. None of this is exotic, but it is the reason an addition set is a thicker package than a kitchen set.
Structure the reviewer will look for
The structural portion of the submittal is explicit: proposed design criteria and loads, floor and roof framing plans with sections, foundation plans and sections including drainage, and braced wall plans and sections prepared under the Virginia Residential Code's wall bracing provisions. When the design goes beyond the code's prescriptive tables, engineering calculations signed and sealed by a Virginia registered design professional are required.
This is where additions on older Alexandria houses get interesting. Tying a new roof into a 1950s roof, carrying a new beam where a bearing wall used to be, and keeping the new foundation from pulling moisture into an old crawlspace are the questions that decide whether the room feels like part of the house in ten years. Moisture, Framing and Structure in Alexandria Home Additions: What to Plan For walks through those three subjects in more depth, and it is a useful companion to the City's checklist because it explains why the reviewer asks for foundation drainage details in the first place.
Ground, water and trees
The City's grading plan checklist, issued under Section 5-6-224(d) of the City Code, adds the site questions. Erosion and sediment control requirements apply when the total disturbed area is more than 2,500 square feet, and the disturbed area has to be calculated the City's way rather than by eyeballing the footprint. Plans must show the total existing and proposed impervious area on the tax parcel, sump pump and roof drain outfalls, two-foot contours on the property and enough of the neighboring ground to show how the site drains relative to what is around it, and the location of tree protection fencing for every tree that is to be saved, with each tree labeled as saved or removed.
For a homeowner, the translation is simple. Where the new roof's water goes, where the sump discharges, and which trees stay are design decisions, not afterthoughts, and the City expects to see them on paper. On the wooded lots along the Holmes Run side of the West End, the tree protection line can shape the addition as much as the setback does.
What a design-build arrangement changes
Vale Construction, a design-build company based in Alexandria at 6020 Alexander Avenue and doing this work since 2002, describes its approach as one contract, one schedule and one team that answers for the whole project. The company holds a Virginia Class A contractor license, lists master plumber and master electrician credentials among its qualifications, and names home additions and sunroom additions among the things it builds. In the context of the checklist above, the point of that arrangement is that the plat, the FAR form, the framing sections and the drainage detail are produced by the same people who will be asked about them at inspection.
It does not remove the homeowner's homework. You still need to know what you want the room to do, how much open space you are willing to trade for it, and whether the oak in the corner is negotiable. Those three answers, more than any finish selection, determine the drawing.
Finishes come last, and that is fine
Once the envelope is settled, the interior conversation is the enjoyable part. Many West End additions end up as kitchen and family-room spaces, and the palette questions covered in this piece on kitchen color choices apply as much to a new room as to a renovated one. For a wider look at how Alexandria owners are approaching whole-house updates, this overview is a reasonable starting point.
From Hammond Middle School on Seminary Road to Alexander Avenue
Francis C. Hammond Middle School, at 4646 Seminary Road in the West End, sits in the middle of the neighborhoods where most of these additions are built; the drive from the school to Vale Construction's office on Alexander Avenue is mapped below.
Vale Construction
6020 Alexander Ave
Alexandria, VA 22310
(571) 474-1920
Questions West End owners ask before an addition
Do I need the survey before I hire a designer? You need it before anyone draws a footprint you are attached to. The plat sets the lot line, the easements and the setbacks, and the City wants it in the submittal regardless.
Does a small bump-out avoid the grading rules? The erosion and sediment control threshold is 2,500 square feet of disturbed area, calculated the City's way, so a modest addition may fall under it. The plat still has to show the disturbed area and its buffer, and the impervious area still has to be reported.
My house is in a historic district. Does that change the order? Yes. The City's submittal list says properties in a historic district need Board of Architectural Review approval before the permit application is made.