A 200-year-old house in tiny Brookeville, Md., where President James Madison was believed to have spent several days when the White House was burned by the British in 1814, is for sale.

Carmelo Pino of DiSalvatore Realty said that Juanita Archer, widow of broadcaster-singer Gene Archer, has placed the three-story, white brick house on the market for $245,000. The property includes two acres. The Archers restored the Madison house after they bought it 20 years ago but kept the original floors, mantels and woodwork.

Notes from this week's convention of the National Association of Home Builders in Los Vegas: Water tanks in new flush toilets are being made smaller to conserve water but bathtubs are offered in larger and larger dimensions . . . Costs of homeowner warranty insurance for builders will go up because builders voted a surcharge to take care of the insuror's need for more dollars to pay off claims under the HOW program.

Sen. and Mrs. George McGovern (D-S.D.) have purchased a $335,000 house in Pasadena, Md., north of Anapolis. The contemporary dwelling on a 1.3-acre tract was purchased from Theodore and Frances Roussil. The McGoverns live in Northwest Washington and also own a house in Mitchell, S.D., and a two-story house in Crownsville, Md., north of Annapolis that is occupied by their daughter, Rita, an aide to the senator said. CAPTION: Picture, OCCUPIED -- The Iowa condominium project of 53 townhouses, at 1325 13th St. NW, is nearly completed and has some tenants. The $92,000 to $110,000 houses are piggy-backed. Complex was built by David Clark & Associates. By Jack Hayes for The Washington Post