Townhome site plans
Enter a Davidson County address. Pick garage or no garage, and the number of units. The website draws a townhome layout for the lot from Metro Nashville GIS records. An engineering office checks it and emails it, usually within 24 hours. $129 for the first unit, plus $25 for each added unit.
Units placed by the rules for the lot
The website loads the parcel, the zoning district and the flood and buffer data for the lot. It then finds the area where units can go. That area is inside the setback lines and outside flood hazard areas and stormwater buffers. In an alternative (-A) zoning district, the fronts of the units go in the build-to zone near the street.
Next, the website places the units in that area. Each unit gets a garage or parking spaces. A private drive connects the units to the street or to the alley. Each garage connects to the drive with a short apron. Existing buildings stay on the plan and are marked to be removed. Existing driveways and parking on the lot are removed.
The website shows the most units that the zoning and the lot allow, and selects that number. You can choose fewer units. A person at the engineering office then checks the layout before we send it.
Layout types the generator tries
The generator tries each type that suits the lot. It keeps the type that fits the most units.
- One row facing the street. For wide lots. Each unit has its own front.
- One row served by a rear alley. The garages open to the alley. The fronts face the street.
- A private drive. Units on one side or on both sides of a drive into the lot.
- A T-shaped drive. For deep lots and flag lots. The drive goes in, then turns both ways.
- A front row with drive aisles. A row of units faces the street. A cross drive behind it serves their garages. Drive aisles go from the cross drive toward the rear, with units on both sides.
The numbers, in one table
Each site plan has a site data table. A buyer, a lender or a builder can read the result of the layout in one place.
The values come from Metro Nashville GIS records and from the layout. They are for planning only.
- Zoning
- The zoning district of the lot, for example RM20.
- Lot area
- The area of the lot in square feet and acres, from the parcel record.
- Density limit
- The most units the zoning district allows on the lot.
- Units shown
- The number of units on the layout.
- Units per acre
- The units shown, divided by the lot area in acres.
- Building cover
- The area under the buildings, as a percent of the lot area.
- Parking
- The garage spaces and the surface spaces on the layout.
The rules the layout follows
Zoning density
The number of units stays at or below the limit for the zoning district.
Setbacks
Units stay inside the front, side and rear setback lines from Metro Code Title 17.
FEMA flood areas
No unit goes in a mapped flood hazard area, approved or pending.
Stormwater buffers
Units stay out of the buffers along streams, wetlands and ponds.
Overlays
The plan shows the overlay districts and planned unit developments on the lot.
Alleys and existing buildings
An alley at the rear can serve the garages. Existing buildings are shown and marked to be removed.
How many units the zoning allows
The zoning district sets the most units on a lot. The website uses these rules for Davidson County.
| Zoning district | Most units on the lot |
|---|---|
| RM districts For example RM9, RM15, RM20 | The number in the name, times the lot area in acres. RM20 on 0.5 acres allows 10 units. |
| R districts For example R6, R8 | 2 units: a two-family building. |
| RS districts, AR2a and AG | 1 unit: a single-family house. |
| Other districts For example SP and mixed-use districts | The zoning plan sets the limit. There is no units-per-acre rule. |
Add what your project needs
Choose options when you order. The total updates before you pay.
Extra detail on the site plan
| Option | Price |
|---|---|
| Topography (2-ft contours) Lines that show the shape of the ground, one line for each 2 feet of height. | $39 |
| Vicinity map A small map that shows where the lot is in the area. | $19 |
| Impervious surface calculation The area of hard surfaces, such as roofs and paving, that rain cannot soak into. | $39 |
| Corner elevations The approximate ground height at each lot corner, from public elevation data. | $19 |
| Critical areas and flood detail More detail on flood zones, streams, steep slopes and buffers near the lot. | $39 |
| Satellite photo sheet A second sheet with the layout drawn over a recent aerial photo. | $29 |
Files
| Format | Price |
|---|---|
| PDF file, 11 x 17 sheet | Included |
| JPG image | +$10 |
| AutoCAD DWG file For designers and builders who work in CAD. | +$20 |
Delivery time
| Delivery | Price |
|---|---|
| Standard delivery Usually within 24 hours. | Included |
| Rush: under 12 hours | $39 |
| Rush: under 4 hours | $89 |
Everything the site plan can show
The color on the left is the color of the layer on the sheet. Layers with no label are on every townhome site plan when the data exists for the lot.
What the plan is, and what it is not
The townhome site plan shows what can fit on the lot. Use it to decide about a lot, to talk with a buyer or a seller, or to start work with a design team.
A final design still needs a civil engineer, an architect and a review by Metro Nashville. Williams Engineering, Inc. can quote the engineering work. Ask for a quote.
Classic permit site plans
Do you need a site plan for a fence, pool, shed, deck or addition permit? We still draw classic permit site plans by request.
How many townhomes fit on your lot?
Start with the address. You see the full price before you pay.