Small lot development - Part 4

Example 1 (ground-up condo): Existing 20’x100’ vacant land in a mid-block lot on a narrow street in the R7A zoning district. FAR: 4. Zoning floor area: 8,000 SF
The plan is to build a 6-story boutique condo building with a 20’x65’ floor plate. There will be 6 floor-through units and each unit has roughly 1,050 SF saleable space (81% efficiency). Gross floor area 9,300 SF (7,800 SF 6-story + 200 SF penthouse + 1,300 SF basement). Front and backyard is 5’ and 30’, respectively. No setback required.
The 1st floor unit is a duplex with 500 SF recreational space in the windowed basement and a large private backyard. The 6th floor unit is also a duplex with a 200 SF penthouse bedroom with a private roof deck. Each unit has a living room facing the street and 2 bedrooms facing the backyard. The living room and master bedroom will each have a balcony.
A private elevator will land on each floor and open directly to the unit. A separate staircase will be built next to the elevator to serve as a means of egress. A common roof deck will be provided for all residents in the building.
Example 2 (rental conversion): Existing 4-story single-family brownstone with a basement in a mid-block lot on a narrow street in the R7-2 zoning district. It was built in the 1920’s with a roughly 18’ x 55’ footprint on a 18’ x 100’ lot. Total as-built: 3,960 SF (plus basement). FAR: 3.44. Zoning floor area: 6,192 SF.
The plan is to enlarge the existing structure by adding a 5th floor and convert the entire building into a 9-unit multifamily rental (all market rate). Gross floor area: 5,940 SF (3,960 SF as-built + 990 SF 5th floor addition + 990 SF basement).
There will be 2 studios on the 1st floor, 1 studio and 1 one-bedroom apartment on the 2nd floor, 2 one-bedroom apartments on 3rd and 4th floors and 1 three-bedroom apartment on the 5th floor units with a private roof deck. Front and backyard is 5’ and 40’, respectively. No setback required.
The backyard will be converted into recreational space and a trash room will be added on each floor per Quality Housing Program. All first floor units need to be ADA compliant and no elevator is required. One fire escape is existing facing the backyard and one more will be added in the front of the building as the 2nd means of egress. See more details in Part 2 What it looks like and Part 3 How it’s done of the series.
The backyard will be converted into recreational space and a trash room will be added on each floor per Quality Housing Program. All first floor units need to be ADA compliant and no elevator is required. One fire escape is existing facing the backyard and one more will be added in the front of the building as the 2nd means of egress. See more details in Part 2 What it looks like and Part 3 How it’s done of the series.
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