A local developer has said he will ask the Howard County Council to reclassify 315 acres in Ellicott City to allow for more intensive development along the proposed path of state Rte. 100. If approved, the change would be the largest parcel of property to be reclassified since the county had much of its land rezoned comprehensively in 1985.

John Liparini, president of the Columbia-based BritAm Development Group, this week said his company wants to upgrade the land it owns at I-95 between Meadowridge Road and Mullineaux Lane for an office park or other commercial use. Britam has hired a consultant to help prepare an application to be submitted to the council "sometime during the first quarter of 1988," he said.

Although the scale and preliminary design of his proposal have yet to be worked out, Liparini said it will likely include some combination of residential, retail and office-research buildings. He has told county and state officials that the roads could handle an "employment center" as large as 1.7 million square feet.

In a letter to Liparini sent earlier this month, Uri P. Avin, Howard's director of planning and zoning, said that half a million square feet of office space is the maximum the site could accommodate. Nearly 2 million square feet would "substantially overload" Rte. 100, he said.

Some council members said that although they could not comment on the merits of a specific application, they would be hesitant to approve a very large zoning change outside of the comprehensive rezoning process. While sitting as the zoning board, the council generally considers minor, or "piecemeal" zoning requests. The county is not expected to begin another comprehensive rezoning until after 1990.

Besides a 108-acre office park and "restaurant row" being developed next to Howard High School, the Rte. 100 corridor is almost strictly residential. In 1985, the council approved zoning changes that upgraded much of the area from single-family detached houses to town houses.

"The land use implications of {building Rte. 100} weren't fully considered," Avin said. "The fact is, this area has undergone significant changes in the last two years and we ought to look at it fresh."

Liparini said that his plan for "mixed-use" development is more consistent with the characteristics of a site bounded by two major highways than the low-density, half-acre residential zoning the land has now and would complement other housing developments cropping up in the Rte. 100 corridor.

"There will be a lot of people living there in the next five years, and they will need places to buy groceries, to have their shirts cleaned and to get a pizza," Liparini said. "It seems logical that the current zoning isn't appropriate."

BritAm made its intentions known to state and local planning officials and County Executive Elizabeth Bobo this fall when it recommended that the design for Rte. 100 be modified to include an interchange on BritAm's property. The most recent sketches of Rte 100, a six-lane, east-west highway between I-95 and U.S. 29 slated to be built in the early 1990s, show the interchange about 1,600 feet to the west, at Meadowridge Road.

The recommendation resulted from a traffic study BritAm had commissioned that concluded that the interchange, even as proposed, could handle the 1.7 million square foot "employment center." Moving the interchange would save the state money in land acquisition and possible construction costs, the study said.

While Liparini has negotiated successfully with the state and county to locate an interchange on the site of another BritAm project at U.S. 29 and Johns Hopkins Road, the planning agencies have responded cautiously so far to the latest plan.

Avin has objected to the suggestion that moving the interchange would save the state money. He pointed out that with engineering studies for Rte. 100 already under way, such a late change "would likely set the project . . . back several years" and create "a more circuitous route" for most drivers.

But Avin did not rule out the possibility of more commercial development for the Rte. 100 corridor.

Avin said that his staff is reviewing the Rte. 100 corridor to determine whether certain areas ought to be rezoned for more intensive development, with specific recommendations scheduled to be made next fall.

One possibility is the area where Snowden River Parkway, which now ends at Rte. 175, will be extended to meet Rte. 100, Avin said. University of Maryland officials recently announced that they were considering selling the university's 195-acre horse farm that will be bounded by Snowden River Parkway, Rte. 100 and Rte. 108.