An 8.6-acre site near downtown Dadeland could receive a major density increase to 25 stories.

On Nov. 19, the Miami-Dade County Commission will vote on creating the Palmetto Transit Sub-District, a new area within the Kendall Urban Center District. The latter district was established in 1999 to boost density around the southernmost Metrorail transit stops.

The Palmetto Transit Sub-District, which would allow up to 25 stories in height and building floor plates of up to 30,000 square feet, abd two ramps of the Palmetto Expressway, just north of South Dadeland Boulevard. The residential density would remain 250 units per acre. Without an increase in height, it would be difficult to actually build up to that level of density.

There are only four parcels within the proposed sub-district and they have the same owner.

Dadeland Towers North Associates, an affiliate of Pennsylvania-based Keystone Property Group, owns the 7-story, 300,986-square-foot office building at 9200 S. Dadeland Blvd., the 7-story, 82,236-square-foot office building at 9300 S. Dadeland Blvd., and the 2-story, 15,274-square-foot office building at 9250 S.W. 74th Ave. Dadeland Metro LLC, also an affiliate of Keystone, owns the 8-story, 474,455-square-foot office building at 9400 S. Dadeland Blvd.

Officials with Keystone couldn’t be reached for comment.

When Keystone acquired 9400 S. Dadeland Blvd. in 2017, President Richard Gottlieb noted it was positioned well for new construction and said the company would explore its options there.

If the new zoning is approved, Keystone could file a site plan under the new rules.