After what happened last Tuesday, Suzanne H. Paciulli says every property she sells in Fairfax County will come with a warning.

In the wake of Audrey Moore's landslide election as chairman of the Fairfax County Board of Supervisors, Paciulli, vice president of commercial development for Mount Vernon Realty, is advising her customers that properties in Fairfax "may not be worth as much next year."

"Uncertainty over what may happen may keep a lot of companies from expanding their business," she said. And other firms thinking of relocating now "might just sit back and see what the climate is in the county," she said.

Paciulli isn't alone in her anxiety about the future of Fairfax. Moore's victory has shaken the county's powerful business and real estate fraternity, which sees her tough stand against "reckless development" during the campaign and in her stormy 16-year career on the board of supervisors as a threat to the economic growth that has turned the area from a sleepy Washington suburb to one of the nation's richest counties.

Still, the Fairfax business community is hardly united in opposition to Moore.

Many business executives interviewed last week said they would reserve judgment. Others are indifferent. "It doesn't have anything to do with us," said Jerry Hamm, executive vice president of Atlantic Research Corp., a diversified technology company based in Fairfax. "Obviously, we like to maintain a good relationship with the people who are involved with local politics, but we don't depend on them a whole lot."

And surprisingly, given the extent to which the campaign was portrayed as a battle between pro- and antibusiness factions in Fairfax County, a number of business executives -- particularly in smaller firms -- said they welcome the election of Moore as a much-needed change.

"I think Audrey Moore might give the community another chance," said Jack Ault, president of Topologic Systems Corp., a high-tech startup company in Fairfax. "The biggest problem in the past has been lack of planning, and that was her big promise. We'll see if she comes through."

Moore ran her campaign to unseat Chairman John Herrity on the issue of growth. Charging that Herrity's leadership during his 12-year tenure had amounted to "dropping the whole city of Newark right on top of our neighborhoods" and that if Herrity were reelected "you will have to get an appointment to get on the Beltway," Moore capitalized on the increasing frustration of the area's residents with the county's overburdened highways and roads.

Her solution to the transportation crisis wasn't entirely controversial -- she has pledged to "get ... the traffic moving again" through road construction and mass transit development.

But how she intends to implement and to finance those promises has been a matter of controversy. Moore has angered developers by arguing that the builders of new industrial and commercial projects should chip in more to help deal with the traffic problems that development creates.

"Developers are already paying more, and have been for some time," said Bill Bestimt, cochairman of the Fairfax County Chamber of Commerce's transportation committee and an assistant vice president of the Milton Co., a Fairfax development firm. "Our transportation problems can't be solved on the backs of new developmment. There isn't enough coming on line."

Of even more concern to some business executives is Moore's pledge to reduce congestion by reining in what she sees as the runaway development in Fairfax during the past few years. They fear that any government-imposed slowdown on building will raise building and land prices, rents and other costs.

The biggest immediate fear is that Moore will revive a controversial proposal, defeated 5-4 by the county board last December, to severely curtail office development on 10,000 acres of county land.

"If there isn't adequate commercial office building available, it's going to increase the cost of doing business," said John M. Toups, who retired in February as chairman of Planning Research Corp., a major high-tech services firm based in McLean.

"It's going to increase the rents that are available and the cost of doing business," he said.

Phillip Reilly, chief finanical officer of Kol Bio Medical Instruments Inc. in Chantilly and a past president of the Fairfax Chamber of Commerce, sees in the new climate a possible "chilling effect" on businesses thinking of moving to Fairfax County.

"It's a problem of image and public relations," Bestimt said. "A slow-growth or a no-growth board could have the result of positioning the county out of the market. ... If you see a decline in the tax base because of businesses leaving or the county not growing, there will be an increase in the taxes on the businesses that remain. That's really what's troubling businessmen."

"I just came back from Louisville {and} if they could get a quarter of the kinds of business we have got in Fairfax over the past few years, they'd be up on chairs screaming with delight," said Russ Boyle, president of the Growth Strategies Organization, a consulting firm that works with counties around the nation on economic growth questions. "That's the difference between the haves and the have-nots. We've got a lot of good things going, and I'd hate to see us throw out the baby with the bath water."

But not all of the county's business leaders are so pessimistic. During the campaign, Moore repeatedly denied she would do anything to jeopardize the county's prosperity, and some Fairfax business officials believe her.

"I thought she kept emphasizing controlled growth. I didn't pick up on her as antigrowth," said Philip Pietras, comptroller of Flow General Inc., a McLean technology services and products company.

"It's never a question of no-growth or progrowth anywhere. It's a question of how much you can absorb," said Alan H. Magazine, president of the National Council on Competitiveness and a member of the Fairfax Board of Supervisors for eight years during the 1970s.

Magazine said that while Moore's policies may spell hardship for the county's developers, they may not affect Fairfax's ability to attract and keep other businesses. "Industry looking at Fairfax County is also looking at finding a quality of life that its workers can enjoy," he said. "To have a probusiness climate but also to have a road system that doesn't allow employes to go more than two miles in 15 minutes is self-defeating. You have to have a total climate."

"I'm glad that Audrey won," said Ken Misner, who moved the headquarters of his small high-tech firm, Dynamic Systems Inc., from Tysons Corner to Reston a few years ago because of traffic problems. "At first, it was idyllic out here," he said. "But in the past few months, it's been a nightmare."

Time lost to traffic jams means money to Misner, whose employes commute regularly between Reston and government agencies -- the company's principal clients -- in Crystal City and the District.

"Herrity put a tremendous emphasis on big developers and big business, and I think the concerns of small business in the county were neglected as a result," said Joe Lahoud, president of a L-C Technologies, a software firm in Fairfax.

"I don't know whether Audrey Moore will make things better, but I'm optimistic that a new person can have an open mind. Maybe now our problems can get addressed with more objectivity," Lahoud said.

Even if she lives up to the very worst expectations, "it's not a disaster," said Karl R. Nelson, a past president of the county's chamber of commerce. "She's only one of nine votes. We will have to deal with her, and it will come out all right."

Michael Markels, chairman of Versar Inc., an environmental services firm headquartered in Springfield, remembers when he first encountered Moore several years ago, while she was the board supervisor from Annandale and he was trying to put up two buildings on a 19-acre plot in her district.

"Without being nasty about it, she did everything she could do to keep us from building," he said. "We went ahead and did it.

"I've lived through this no-growth stuff in the past," he said. "There will be some changing of policies at the margin, small differences here and there. But the things that need to get done will get done anyway."

Washington Post staff writers Elizabeth Tucker and Sandra Sugawara contributed to this report.