ANDO: Airport Noise Disclosure Overlay District Standards
The ANDO Airport Noise Disclosure Overlay District in the City of Charlotte functions as a regulatory mechanism to ensure property owners are notified of aircraft noise and overflight activity. It primary modifies the base zoning district standards by requiring a mandatory "Noise Warning" notice on all development documents and final plats for residential or mixed-use projects. Additionally, it prohibits certain high-density residential development options, such as Compact Residential Development, in areas with high noise levels as defined by the 65 DNL contour.
Purpose and Scope of the ANDO Overlay
The City of Charlotte established the ANDO Airport Noise Disclosure Overlay District to disclose to residential property owners in the vicinity of Charlotte Douglas International Airport that their property is subject to consistent overflights and aircraft noise [Section 14.9.A]. Unlike traditional overlay districts that might modify physical envelopes (like setbacks or height), the ANDO Overlay focuses on administrative transparency and specific use limitations based on noise metrics [Section 14.9.B].
Modifications to Development Standards
The following table outlines how the ANDO Airport Noise Disclosure Overlay District modifies or adds requirements to the base zoning districts within the City of Charlotte:
| Requirement Category | ANDO Overlay Standard |
|---|---|
| Mandatory Disclosure | Required for all residential and mixed-use developments with a residential component [Section 14.9.B.1]. |
| Project Documentation | All plats and site plans submitted to the City must include the official ANDO District Notice [Section 14.9.B.2]. |
| Final Plat Inscription | Subdivisions wholly or partially in the overlay must inscribe the disclosure notice on the final recorded plat [Section 30.7.11]. |
| Compact Residential Restriction | Compact Residential Development is prohibited on any parcel within the 65 DNL contour on the Airport Noise Exposure Map [Section 4.5.C.1.b]. |
| Use Compatibility | Intended to ensure residential uses are compatible with airport environs [Section 14.9.A]. |
Specific Notice Requirements
The City of Charlotte requires the following exact language to be displayed on all relevant development documents within the ANDO Airport Noise Disclosure Overlay District [Section 14.9.B.3]:
"Noise Warning - This property, either partially or wholly, is zoned Airport Noise Disclosure Overlay District and lies within or near the noise exposure map areas of Charlotte Douglas International Airport and may be subject to noise that may be objectionable."
Relationship to the Noise Exposure Map
The applicability of certain standards within the overlay is tied to the City of Charlotte's Noise Exposure Map (NEM). This map tracks the Day Night Average Sound Level (DNL), which is a noise metric reflecting a person's cumulative exposure to sound over a 24-hour period, with additional weighting for nighttime flights occurring between 10:00 p.m. and 7:00 a.m. [Section 2.3].
Properties falling within the 65 DNL contour are subject to stricter limitations regarding development options, effectively modifying the residential permissions of the underlying base zoning district to prevent high-intensity residential development in high-noise areas [Section 4.5.C.1.b].
Sections Cited
- Article 2, Section 2.3 (General Definitions)
- Article 4, Section 4.5.C (Compact Residential Development)
- Article 14, Section 14.1 (Purpose and Intent of Special Purpose & Overlay Zoning Districts)
- Article 14, Section 14.9 (ANDO Airport Noise Disclosure Overlay District)
- Article 30, Section 30.7.11 (Final Plat Requirements)