General Definition “Qualifying exterior wall thickness” shall refer to the floor space occupied by exterior wall thickness added to a building existing on December 6, 2023, where: (a) for over-cladding projects: such wall thickness is added to a wall existing on December 6, 2023, up to a maximum of 12 inches, provided the added wall thickness has an aggregate thermal resistance (R-value) of at least 1.5 per inch; or (b) for re-cladding projects: such wall thickness is located within a new wall that replaces a wall existing on December 6, 2023, where the qualifying portion is occupied by additional thickness relative to the previous wall, up to a maximum of 12 additional inches, and provided that the new wall shall comply with the minimum prescriptive and mandatory requirements for building thermal envelopes of the current New York City Energy Conservation Code. Qualifying exterior wall thickness shall also include exterior wall thickness in exterior walls constructed between April 30, 2012 and December 6, 2023 where such exterior wall thickness satisfied the requirements of paragraph (12)(ii) of the definition of floor area in effect at the time of construction. Qualifying exterior wall thickness need not exclusively contain insulating materials and may include wall thickness occupied by conduits, ductwork, pipes, or other essential non-insulating building components.
qualifying exterior wall thickness
qualifying exterior wall thickness is a defined term in the New York City Zoning Resolution glossary (§12-10). It is referenced in 14 ZR sections. Last amended December 6, 2023.
Quick Facts
- Definition source
- §12-10
- Sections using term
- 14
- Last amended
- December 6, 2023
What does “qualifying exterior wall thickness” mean?
Where is “qualifying exterior wall thickness” referenced?
14 sections reference this term. Showing first 14.
- §107-223 — Permitted obstruction in designated open space
- §23-311 — Permitted obstructions in all yards, courts and open areas
- §23-332 — Basic side yard requirements in R1 through R5 Districts
- §23-372 — Distance between legally required windows and lot lines
- §23-411 — General permitted obstructions
- §23-413 — Permitted obstructions in certain districts
- §24-55 — Required Side and Rear Setbacks
- §37-53 — Design Standards for Pedestrian Circulation Spaces
- §37-721 — Sidewalk frontage
- §37-726 — Permitted obstructions
- §52-22 — Structural Alterations
- §54-51 — Energy Infrastructure or Retrofits
- §62-11 — Definitions
- §81-252 — Permitted obstructions
Frequently Asked
What does "qualifying exterior wall thickness" mean in NYC zoning?
"qualifying exterior wall thickness" is a term defined in §12-10 of the New York City Zoning Resolution glossary. General Definition “Qualifying exterior wall thickness” shall refer to the floor space occupied by exterior wall thickness added to a building existing on December 6, 2023, where: (a) for over-cladding projects: such wall thickness is added to a wall existing on December 6, 2023,
Where is "qualifying exterior wall thickness" used in the NYC Zoning Resolution?
The term "qualifying exterior wall thickness" is referenced in 14 sections of the NYC Zoning Resolution. Every section that uses this term must be read in light of the §12-10 definition.
Is "qualifying exterior wall thickness" an official NYC zoning term?
Yes. "qualifying exterior wall thickness" is an officially-defined term in §12-10 of the NYC Zoning Resolution maintained by the NYC Department of City Planning. The authoritative source is zr.planning.nyc.gov.
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