R7B Zoning NYC, Multifamily Residential
In NYC R7B Zoning is a medium density residential zoning district. It is a contextual zone and must follow the regulations for Quality Housing Program. R7B is found in Manhattan, The Bronx, Brooklyn , and Queens.
This post will focused on R7B Contextual Zoning, here is a list of all the R7 Zoning Districts.
Basic R7 Zoning Districts
R7 Contextual Districts
R7B Zoning NYC
R7B is a medium density contextual residential zoning district in New York City. R7B districts have multifamily buildings about 5 or 6 stories high. Zoning districts that end in a letter are “Contextual Districts” and follow the rules of the Quality Housing Program.
Quality Housing Program R7B
The Quality Housing Program promotes shorter wider buildings that are typically larger in square footage then a tall skinny building. The Quality Housing Program is not to be confused with the Inclusionary Housing Program for affordable housing. The quality housing program is separate set of zoning regulations and has nothing to do with low income or affordable housing. The quality housing program typically will result in a larger building of a higher quality. There are more zoning floor area deductions in quality housing that would give you a boost to your total building size.
R7B Zoning Community Facility
R7B Zoning is a residential zone but Community Facility uses are allowed in all R7 zones. In the instance of a community facility the zoning calculations would be different. One can also build a mixed use building with both community facility and residential use.
R7B Zoning Commercial Overlay
Sometimes residential districts have commercial overlays. This means the zone is primarily residential but commercial use is allowed instead or you can have both as a mixed use building. Here is a link to an article we wrote on Commercial Overlays.
R7B Zoning Regulations For Quality Housing
Minimum Lot width =18 Feet
Minimum Lot Area = 1,700 Sq Ft
Corner Lot = 100%
Interior or Through Lot = 65%
Floor Area Ratio (FAR):
FAR = 3
680 – This is used to calculate how many apartments you can have. The total residential floor area is divided by this factor to get the maximum allowable number of dwelling units.
Building Base Height: This indicates a setback is required at these heights
Base Height = 40 Minimum / 65 Maximum
A setback is required in the base height range. Or this can be the maximum height of the building without a setback.
Overall Building Height: This is the maximum building height
Manhattan Core: = 75 feet
Corner Lot: No Yards Required
Interior Lot = 30 foot minimum rear yard required
R7B Zoning Example
Here is an example analysis. Be aware that zoning is complicated and I am only addressing the basics here. I assure you there are many additional issues and variations to consider beyond this example.
R7B Zoning Example Lot
Lets assume we have a 50 foot wide and 100 foot deep property in an R7B Zoning District in Manhattan on an interior lot.
Building Foot Print:
First Lets start with Lot Coverage and Yards. We know we will need a minimum rear yard of 30 feet. We can cover 65% of the property. So we can make a 35 foot rear yard and build on 50 x 65 feet giving us a building footprint of 3,250 square feet.
Zoning Floor Area/ Floor Area Ratio (FAR)
So the floor area ratio is 3. The FAR is a ratio that determines how many square feet you can build on the property. You simply take the property size and multiply it by the FAR.
In this example we have:
FAR of 3
Lot Size of 50 feet x 100 feet.
Zoning Floor Area = Lot Area X FAR
Lot Area = 50 x 100
Lot Area = 5,000 sq ft
FAR = 3
Zoning Floor Area = 5,000 sq ft x 3
Zoning Floor Area = 15,000 sq ft
So we can build a 15,000 sq ft building. This is the zoning square footage, the actual building will be a little bigger than that.
We said our building foot print would be 50 x 65. Or 3,250 per floor.
This will give us a 5 story building.
How many apartments can we build on our R7B lot?
Zoning regulates the maximum number of residential units you can put in a building. In this apartment building we have 15,000 zoning square feet. We then take the zoning Area and divide by the Density factor.
Number Of Apartments = Zoning Floor Area ÷ Density Factor
Number Of apartments = 15,000 ÷ 680
Number Of Apartments = 22
Maximum Number Of apartments = 22
R7B Zoning Example Conclusion
In this example we are proposing to build a 15,000 sq ft building. The apartment building will be 5 stories tall and have a setback at least on the top floor. The Building will have a foot print of 50 x 65. It will have a maximum of 22 apartments but can have less as well.
Thank you for reading our Blog Post on R7B Zoning.
I hope this was helpful. If you want to discuss a specific project with an architect please feel free to Contact Fontan Architecture. We will be happy to help.
Author Jorge Fontan AIA
This post was written by Jorge Fontan, a Registered Architect and owner of Fontan Architecture.