§ 27A-407. Detached Building Envelope Standards.

(a)

Intent and Illustrations.

The detached Building Envelope Standard generally consists of single-family houses with small front, side and rear yards along a tree-lined Street. Structures are typically 2 to 3 stories in height with pitched roofs and porches. This frontage is not common in an Urban Center. It is intended exclusively for the edges of centers that abut existing residential neighborhoods.

(b)

Detached Height and Siting

FIGURE 19

(1)

Height

(A)

Building Height. Each building shall be:

UC-1: 2 stories minimum, 3 stories and forty-five (45) feet maximum.

UC-2: 2 stories minimum, 3 stories and forty-five (45) feet maximum.

UC-3: 1 Story minimum, 2 stories and thirty (30) feet maximum.

UC-4: 1 Story minimum, 2 stories and thirty (30) feet maximum.

(B)

A side wing or ancillary structure shall be no higher than eighteen (18) feet, measured to its eaves.

(C)

Ground Story Height

(i)

The average finished floor elevation shall be no less than thirty (30) inches and no more than sixty (60) inches above the exterior sidewalk elevation at the Build-to Line (BTL).

(ii)

At least eighty percent (80%) of the first Story shall have an interior clear height (floor to ceiling) of at least nine (9) feet.

(iii)

The maximum Ground Story floor to floor height is sixteen (16) feet.

(D)

Upper Story Height

(i)

The maximum floor-to-floor Story Height for stories other than the Ground Story is twelve (12) feet.

(ii)

Each upper Story shall have an interior clear height (floor to ceiling) of at least nine (9) feet.

(E)

Front Yard Fence. A Front Yard Fence is required with a minimum height of thirty (30) inches and a maximum height of forty (40) inches. The Front Yard Fence may be located within one (1) foot behind and parallel to the property line sidewalk/Dooryard area of private lots and also along common lot lines to a point at least ten (10) feet back from the Build-to Line.

FIGURE 20

(2)

Siting

(A)

Street Façade

(i)

On each lot the Front Porch shall be built to the Build-to Line (BTL) for at least thirty-three percent (33%) of the building width.

(ii)

Within twenty (20) feet of a Block Corner the building Façade shall be eight (8) to ten (10) feet behind the Build-to Line (BTL).

(B)

Buildable Area. A contiguous private open space equal to at least twenty-five percent (25%) of the total Buildable Area shall be preserved on every lot. Such contiguous open area may be located anywhere behind the parking setback, at grade.

(C)

Lot Size

(i)

Each lot has a minimum width of twenty-four (24) feet and a minimum depth of ninety (90) feet.

(ii)

Each lot has a maximum width of seventy-five (75) feet or two-thirds (2/3) of the width of the existing fronting lots, whichever is greater. The maximum depth is one hundred twenty (120) feet.

(D)

Front Yard. The Front Yard/Dooryard shall not be paved.

(E)

Side Lot Setbacks. The minimum side lot setback shall be five (5) feet or as otherwise designated on the Regulating Plan.

(F)

Garage and Parking. Curb cuts or driveways shall be located at least seventy-five (75) feet away from any Block Corner or another garage entry on the same Block face. These requirements are not applicable along Alleys.

(G)

Garage doors shall not be located on the Build-to Line (BTL)/building Façade.

(H)

Alleys. There is a three (3) foot required setback from Alleys.

(c)

Detached Elements and Use

FIGURE 21

(1)

Elements

(A)

Fenestration

(i)

Blank lengths of wall exceeding twenty (20) linear feet are prohibited on all Build-to Lines (BTL).

(ii)

Fenestration on all Façades shall comprise at least twenty-five percent (25%), but not more than seventy percent (70%), of the Façade.

(iii)

No Ground Story window may face or direct views toward a Common Lot Line within twenty (20) feet unless:

(aa)

That view is contained within the lot (e.g. by a Privacy Fence/Garden Wall), or

(bb)

The sill for any window on the Ground Story is at least six (6) feet above the finished floor level.

(B)

Building Projections

(i)

Each lot shall include a Front Porch at the Build-to Line (BTL), between eight (8) feet and ten (10) feet deep with a width not less than thirty-three percent (33%) of the building width.

(ii)

No part of any building except porch roof (overhanging eaves) and steps shall encroach beyond the Build-to Line (BTL).

(C)

Doors/Entries. At least one functioning entry door shall be provided along the Ground Story Façade of each building.

(D)

Street Walls and Fences

(i)

There is no Street Wall requirement.

(ii)

A Front Yard Fence is required within one (1) foot of the Clear Walkway/Dooryard line parallel to the Build-to Line (BTL). The Front Yard Fence may be located within one (1) foot behind and parallel to the property line sidewalk/Dooryard area of private lots and also along common lot lines to a point at least ten (10) feet back from the Build-to Line.

(iii)

A Privacy Fence may be constructed along any Common Lot Line or Alley, behind the Façade.

FIGURE 22

(2)

Use

(A)

Ground Story. The Ground Story may only house residential uses.

(B)

Upper Stories

(i)

The upper stories may only house residential uses.

(ii)

Additional habitable space is permitted within the roof where the roof is configured as an attic Story.

(C)

Accessory Units. Parking and Accessory Unit uses are permitted in the Buildable Area at the rear of the lot. The maximum footprint for an Accessory Unit building shall not exceed six-hundred fifty (650) square feet.

(D)

Specific Use Requirements. See Section 27A-802 for specific use requirements.

(CB-1-2010)