Mortgage rates around the country crept up this week, although 30-year mortgage rates stayed below 6 percent for a fourth straight week, Freddie Mac said Thursday.

The mortgage giant said that its latest nationwide survey showed that rates on 30-year fixed-rate mortgages rose to 5.82 percent, from the average rate of 5.81 percent last week.

For 15-year fixed-rate mortgages, a popular option for refinancing, rates rose to 5.21 percent this week, from 5.19 percent last week. Rates on one-year adjustable-rate mortgages increased to 4.05 percent, from 4.01 percent last week.

The nationwide averages for mortgage rates do not include add-on fees known as points. The 30-year mortgage carried an average 0.7 point fee this week. Fifteen-year and one-year mortgages each carried a 0.6 point fee.

Last year, rates on 30-year mortgages averaged 6.28 percent, 15-year mortgages were at 5.60 percent and one-year ARMs were at 3.84 percent.

EVENTS . . . Architecture Week 2004, sponsored by the American Institute of Architects' Washington chapter, runs Sept. 6-18. Most events are free, but space is limited, so reservations are required. For reservations and information, call 202-667-1798. A selection: On Sept. 6 from 9 a.m. to 4 p.m. at the National Building Museum (401 F St. NW, Washington), at a Student Architects' Charrette, local architecture students solve a design problem. For reservations, call 202-667-1798; on Sept. 7 at 4 p.m., a construction-watch tour of Langston Lofts with the architects affords a preview into a residential project at 14th and V streets NW; on Sept. 8 from 5 to 7 p.m., tour Georgetown architects' offices during a self-guided tour followed by a reception in Cady's Alley, a home-decor shopping district; on Sept. 10 at 5 p.m., the best new Washington architecture is recognized during a jurors' roundtable of visiting architects at the AIA/DC Chapter House, 1777 Church St. NW; a reception follows; on Sept. 11 from 6 p.m. to midnight, the Canstruction Build-Out features teams of architects building giant structures from donated canned goods at 2000 Pennsylvania Ave. NW. The exhibit runs for a week; on Sept. 12 from 1 to 3 p.m., take a walking tour of 14th Street NW with writer Daniel Emberley and AIA/DC Executive Director Mary Fitch; on Sept. 13 from 6:30 to 8 p.m. at 1735 New York Ave. NW, "How to Work with an Architect" is an introductory workshop detailing what to expect during the design-and-construction process; on Sept. 18 from 10 a.m. to 4 p.m., the National Building Museum's Festival of the Building Arts affords chances to build a brick wall, thatch a roof, climb aboard a concrete mixer or play "House of Cards," a game about sustainable design. The museum is at 401 F St. NW; call 202-272-2448 for information.

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