Mystic — Developer David Lattizori of Groton has taken the first official step toward developing a potential $60 million medical, research and residential campus on 70 acres of the Perkins Farm property off Jerry Browne Road.

Lattizori has filed an application with the Stonington Planning and Zoning Commission seeking to amend the zoning regulations to create a new floating zone that could be located on the property.

The commission will now set a public hearing on the application in July.

According to the application, the Greenway Development District is designed to provide an alternative to a housing subdivision, while encouraging preservation of a significant amount of open space (more than 50 percent) and promoting “smart” economic development by allowing a mix of uses.

“We really want to promote conservation through development,” said Lattizori, who has approval to build 36 homes on the site while preserving 15 percent of the land as open space.

Many of the homes would line Jerry Browne Road across from the Stone Ridge retirement community.

He said the proposed development would cluster development along Interstate 95 and not be seen from Jerry Browne Road.

It would leave the wooded area and meadow that front Jerry Browne Road from Coogan Boulevard to Pequotsepos Road intact.

The uses include housing for people age 55 and older, workforce apartments, research and development, medical and professional offices, museums, wellness centers, academic facilities, out patient and urgent care facilities along with technology and light manufacturing operations.

No retail would be allowed except for farm stands.

Amusement, theme and water parks would be prohibited. Also prohibited are vehicle and boat sales and leasing, gas stations and car washes.

To use the zone, a developer must have a minimum of 50 acres of land in the GBR-130, RR-80 and RA-40 residential zones. Fifty percent of the site would have to be preserved for open space.

If‘ the commission implements the district, developers seeking to use it also would need to obtain approval for a master plan, which would require another public hearing, and site plan approval.

The amendment also contains detailed language outlining requirements concerning architectural design, roads, parking, buffers, signs and other items.

Lattizori said he has continued to meet with a committee of Stone Ridge residents over the past year to discuss the project and said he continues to receive positive feedback from them.

“They realize that this project will not only enhance and complement their community but provide them with additional amenities,” he said.

Over the past two decades, Lattizori’s family had made previous unsuccessful efforts to develop the site with a mix of commercial uses that were rejected by the town following opposition from some residents, including those from Stone Ridge.

Several years ago he received approval for a 36-lot subdivision of single family homes on the site but he has not built them as he continued to look for another use.

Lattizori has said it was a retired doctor who lives at Stone Ridge who suggested the idea of a project with a geriatric health component.

Lattizori said that he hopes to receive approval for the text amendment early this summer.

That would pave the way for submission of the master plan, which he said is being developed.

He then would need site plan approval and to attract tenants.

“This could happen pretty quickly,” he said, adding that he already has been talking to interested tenants.

He also has continued talks with the Stonington Water Pollution Control Authority about resolving a sewer boundary issue that leaves about 60 percent of the property not served by sewers.

The entire property needs to be sewered for the project to occur.

At a meeting in February, authority members indicated a willingness to work with Lattizori to move the boundary line, saying it appears the boundary lines — which date to 1967 — were not drawn with great care as to how they affect properties.

The boundary line cuts through the Perkins Farm property.

Lattizori and his family paid $250,000 to extend sewer lines up Jerry Browne Road to Stone Ridge.

j.wojtas@theday.com