The National Association of Mutual Savings Banks has scheduled a mortgage conference here, Sept. 10 to 12. Speakers will include HUD Secretary Patricia Harris, Rep. Thomas L. Ashley (D-Ohio), chairman of the House subcommittee on housing and community development and Robert H. McKinney, chairman of the Federal Home Loan Bank Board.

Karel McClellan, formerly an investment property specialist with Coldwell Banker here, has joined Burr, Morris & Pardoe as vice president of marketing and development. She will be responsible for condominium and subdivision sales.

MR Real Estate Inc. has opened offices in Great Falls and in the Burke-Springfield area. Ed McGrath, principal broker of the Vienna-based firm, said that the firm had its largest volume ($2.6 million) in June, when the average sale price of resold residences was $78,800.

State building officials and representatives from many parts of the nation will attend a week-long national conference on building codes and public safety to be held at the Annapolis Hilton starting September 11. The National Conference of States on Building Codes and Standards, based in McLean, is the sponsor of the conference.

Techniques to conserve energy will be demonstrated at an "energy fair" to be held Sept. 16 at the Lake Braddock secondary school in Burke. The Northern Virginia Board of Realtors is sponsoring the event, which will begin at noon. Homeowners and aparment dwellers in Northern Virginia are invited.

The Consumer Information Institute will conduct a seminar on "How to Sell to Home, With or Without a Broker," Sept. 16 at the Key Bridge Marriott. For information about fees, call 649-6666.

A course on the basics of residential management will be given, beginning Sept. 22, by the area chapter of the Institute of Real Estate Management at the Chevy Chase Community Center. For information, call 384-0333.

The Suburban Maryland Home Builders Association will hold its annual trade show Sept. 12 at the Sheraton Lanham Inn. There will be [WORD ILLEGIBLE] displays of building products and services.

Mortgage refinancing of $1.1 million has been obtained for the 11-story Garfield House apartment building at 2944 Wisconsin Ave. NW by the Carey Winston Co.

An annual commercial leasing award to honor the memory of realtor Donald C. Rosinski, who died earlier this year, has been set up with the Washington Board of Realtors by American Federal Savings and Loan Association.

Ray Roper, 38, formerly with the Missouri Association of Realtors, has been named senior vice president of the National Association of Realtors, the large trade association based in Chicago. Roper succeeds the late William Magel.

Ray Wilson, who entered real estate in 1971 after a 35-year military and civil service career, has been named property manager of Better Homes Realty, which has 19 offices in this area.

Marylouise Day, a fee appraiser and consultant, was elected president of the area chapter of the American Society of Apraisers. Day originated the annual fine arts forum sponsored by the society. She is the first woman to head the ASA chapter founded in 1954.

Lee David, vice president and head of management for the Carey Winston Co., recently was awarded the designation of "real property administrator" by the Building Owners and Managers Institute. It was the first such professional designation to be made to a management executive in this area.