Prince George's County Executive Winfield M. Kelly Jr. yesterday released the county's long awaited sewer allocation list, which, if implemented, would bring the county another step closer to Kelly's goal of increasing the number of resident-owned homes in the county.

Without sewer hookups, developers cannot proceed with building plans. As a result, hookup approval is imperative for all building projects.

Of the 5,968 units approved for sewer hookups yesterday, only 90 are for apartments and 20 for condominiums. The remaining 5,858 are for single family homes and town houses.

It has been the county's policy since the County Council passed a resolution at Kelly's behest in 1976 to encourage the development of houses rather than apartments.

The 1979 resolution said 68 percent of the county's housing supply should be single family units and town houses. When the new sewer allocation list is implemented, those kinds of housing will make up 60.1 percent of the supply, an increase of 4 percent since Kelly took office win 1976. Kelly is seeking reelection this year.

Most of the dwellings that will receive sewer hookups under the plan are in three areas in the eastern and southern portions of the county.

The 54 projects approved range in size from one acre to 395 acres and there are eight other projects with 100 or more acres. Several of these have zoning conducive to large lots, which lead to expensive homes, another commodity Kelly wants more of in the county.

In addition to the 54 housing projects approved for hookups, 15 comprehensive design zone projects were placed on a reservation list for hookups. Those projects are larger, generally commercial projects not ready for construction that have received approval from the County Council.

The council still must approve the list and that will probably not take place until September. Following council approval, the developers must apply to the Washington Suburban Sanitary Commission for hookups.

Thus it will probably be about four or five months before any of the approved projects receive a hookup.

"This is just a continuation of Kelly's plans to develop major family-owned houses in the county," Kelly aide John A. Lally said yesterday. "A lot of the projects which were turned down hadn't received zoning approval or weren't complete in their planning yet.

"In the past we've given approval to projects and then had to rezone and things later. We're trying to avoid that with these projects."

The list of those who were rejected has not yet been compiled, Lally said, adding he did not know how many projects had been rejected.