# Overlay district

An overlay district adds rules on top of the base zoning in a mapped area, such as design standards downtown. Also called overlay zone.

Data as of Oct 11, 2026. Page: https://boardwalkai.com/glossary/overlay-district/

## What it is

An overlay adds or changes rules for land in a mapped area without replacing its base zoning. Common ones cover historic areas, corridors, airports, floodplains, and transit stations.

## What it tells you

A new overlay shows where a city wants a certain kind of growth, such as denser housing near transit. A request to join an overlay can unlock uses or incentives the base zoning does not allow.

## How it moves through a city or county

1. The city or county proposes the overlay, often after a plan or study.
2. The planning commission holds a hearing and recommends.
3. The council or county commission adopts the map and rules by ordinance.
4. Projects inside it then meet the extra rules at site plan or design review.

Some overlays add limits; others offer incentives like extra height. In some places owners can ask to join one, much like a rezoning.

Rules vary by state, county, and city. These pages describe common practice, not legal advice.

## Recent overlay requests

From public filings in Colorado, New Jersey, and New Mexico.

| Project | Location | Developer | Type | Size | Stage | Latest meeting |
|---|---|---|---|---|---|---|
| 40-Unit Inclusionary Multifamily Development | Glen Rock, NJ | 66 Glen Avenue L.L.C. | Affordable (LIHTC) housing | 40 units · 1 acres | Seeking approval | Jun 14, 2026 |
| 28-Unit Residential and Commercial Development | Granby, CO | Habitat for Humanity | Duplexes to fourplexes | 28 units · 2.65 acres | Seeking approval | Oct 5, 2026 |
| 15-Acre Solar Field Overlay Zone | Belen, NM | US Solar Development LLC | Utilities | 15 acres | Seeking approval | Apr 28, 2026 |

Samples show projects filed by companies or public bodies.

## Find it on Boardwalk

Search Boardwalk for "overlay" with a place name. [Start free trial](https://boardwalkai.com/auth/signup/)

## Related terms

- [Rezoning](https://boardwalkai.com/glossary/rezoning/): A rezoning changes the zoning district on a piece of land, which changes what can be built there and how much.
- [Zoning text amendment](https://boardwalkai.com/glossary/zoning-text-amendment/): A zoning text amendment changes the written rules of a zoning code, such as which uses a district allows, not the map.
- [Design review](https://boardwalkai.com/glossary/design-review/): Design review checks how a proposed building looks, including materials, height, massing, and landscaping, against a city's design standards.

## Common questions

### How do I know if a property is in an overlay district?

The city or county zoning map shows overlay districts, usually as a separate layer. Planning staff can confirm which overlay rules apply to a property.

### Does an overlay change the base zoning?

No, an overlay sits on top of the base zoning, which still applies. Where the two conflict, the code says which rule wins, and it is often the overlay.

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## How to cite

Source: Boardwalk, "Overlay district", boardwalkai.com/glossary/overlay-district/, data as of Oct 11, 2026.

How we count: https://boardwalkai.com/coverage/#how-we-count