THE D.C. CITY COUNCIL has approved the nominations of three attorneys as new members of the Rental Housing Commission.

The city's new rent-control law requires that all three members of the commission be attorneys, in contrast to the previous legislation, which called for two lawyers and an accountant. The commission hears appeals of the D.C. rent administrator's decisions and issues regulations implementing the city rent-control program.

The new commissioners, chosen by Mayor Marion Barry, are: Belva Newsome, a former District assistant corporation counsel, former trial attorney with the federal Department of Energy, and now a partner in the firm of Woodson and Woodson; Isaiah Thornton Creswell Jr., who has worked as director of federal-state and consumer relations for the Federal Trade Commission, assistant staff director for field operations at the U.S. Commission on Civil Rights and is now in private practice in the city; and Daniel B. Jordan, who has worked as counsel for the American Postal Workers Union, the Textile Workers Union and the federal Office of Economic Opportunity and is now in private practice.

The present members, whose terms expire when the new rent control law goes into effect next week, are Chairman Jacqueline Moore, Charles Simpson and David Marlin.

TIMBERLAWN, the controversial and embattled subdivision on the grounds of the old Shriver estate, has received approval for its preliminary plan at a Montgomery County planning board meeting after developers agreed to a dozen road and sign conditions.

Once billed as a subdivision of exclusive, single-family homes, Timberlawn changed directions midstream several years ago when developers announced they wanted to build town houses on the remaining, undeveloped part of the 90-acre tract.

After a year of negotiations with residents who had already purchased $200,000 homes, the developers submitted plans to the county planning board last winter. But board members were unhappy with the proposed road system for the development and handed down a series of denials over the next few months.

Initial plans called for narrowing a primary road as it passed between two existing houses and connected with the subdivision's access road to Edson Road; the board members called this proposal completely unacceptable. The developers have agreed to purchase the two homes and widen that section of the road.

And last month they agreed to a number of further conditions, including the constructing more traffic signs, reconstructing medians and providing a bus shelter. Construction on the town houses is expected to begin this fall.

FIVE MONTHS AFTER the application was filed, Fairfax County this week approved permits to allow developers of Tysons II to pave a new stretch of International Drive, which is considered to be a key to improving Tysons Corner traffic congestion.

The 3,200-foot strip will connect Route 123 with Greensboro Drive, providing commuters with with a new access to the Dulles Toll Road as well as relieving major congestion at the Route 123 and International Drive intersection, developers said.

Parts of the new road will be 10 lanes wide because of turn lanes that will be needed at different points. The construction of International Drive is one of several major road improvements promised by developers during the rezoning of the Tysons II site.

Homart Development Corp., developers of the 107-acre Tysons II retail, hotel and office project, filed for paving permits in February. Those permits were released this week, according to the county's Department of Environmental Management.

"We are three months behind schedule on asphalt paving," said Wayne Angle, the Homart official in charge of Tysons II development. Grading was completed in April, but paving could not proceed because of delays in getting permits approved.

In spite of delayed permits, Angle said Homart will be able to "complete construction of International Drive before the end of this year." Angle called the new part of International Drive "the facilitator of" all future road improvements in the Tysons area. He would not estimate how much money delays have cost Homart.

"We were surprised at how long it took to get the permits," Angle said.

William A. Hazel Inc. of Chantilly will be the paving contractor. S. W. Rodgers Inc. of Manassas is the grading contractor.

Meanwhile, Homart is waiting for the Virginia Department of Highways and Transportation to approve permits to allow it to proceed with widening of Route 123 in the Tysons area.