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Related to downzone: rezone
v. down·zoned, down·zon·ing, down·zones
To change the zoning of (an area or neighborhood) to reduce the density of housing or permitted construction: proposed to downzone residential areas near the shore.
To downzone an area or neighborhood.
to reduce the density of housing in (an area)to downgrade the classification of (a zone) in order to restrict the type of buildings allowed in that area