The Nantucket-style carriage house has 23 rooms that take up 8,800 square feet. It's four acres of land include terrace lawns that look out over Westchester County hills.

Its Brazilian cherry floors, walk-in wine refrigerator, 15-seat movie theater, and in-ground pool with spa and waterfall are aimed at the connoisseur. It took more than two dozen design professionals to produce the home.

Asking price? Four million dollars.

But before a someone with $4 million grabs it, people without that kind of cash will have a chance to tour it for a $25 donation.

The Kinderwood Designer Showhouse, as it's been named, will raise money for Green Chimneys' Good Friends Program, which matches Danbury-area children with adult mentors.

Joanne Threlfall, who serves on the board of directors of Green Chimneys and has run numerous fund-raisers for the children's service organization, has a background in interior design.

She thought a showhouse would be an excellent choice for a new benefit, and, with a simple phone call, happened upon the creative vision of contractors Joe Fossi and Reed Whipple and architect Doug McMillan.

"It was good timing on Joanne's part," Fossi said. "She asked if we had anything available this year. We were just getting started on this house and agreed to do it in conjunction with them."

Fossi, of Pelham Country Homes; and Whipple, of Heritage Homes, have a combined 50 years experience in construction in Ridgefield.

"I think the piece of property lends itself to this caliber house," Whipple said. "Architecture, setting, style it's everything you could want in a house, and only an hour from New York City.

"I believe it is undervalued for what you pay in lower Fairfield County. In New Canaan, this house on this property could go for $7 million to $8 million."

Its four bedrooms and the three-room au pair suite each have adjoining bathrooms, for a total of five full baths and three powder rooms. The master bath has a frameless glass shower enclosure.

An audio system pipes sound throughout the three levels of the house, and there are plasma televisions in four of the rooms, including the family room.

The room is being painted by Pat Ganino and Sharon McCormick of Creative Evolution in Madison with faux Venetian plaster walls and a sky mural on the coffered ceiling.

Whipple and Fossi are selling the house without a Realtor. They've said if it sells as a result of the tours, Green Chimneys will receive a minimum of 2 percent and as high as 4 percent of the sale price that would have been a Realtor's commission. If the house has not sold by the end of the tours in October, it will be listed with a broker.

Realtor Anne Schmiedel of William Pitt's Ridgefield office has no doubt the house will sell at the asking price. Since January 2003, she said, seven Ridgefield houses have sold for more than $2.5 million. In 2004, one sold for $7.95 million.

"Whipple and Fossi are builders that people seek out," Schmiedel said. "By square-footage, the reputation of the builders, the special construction of the house, and the figures I am seeing in the Multiple Listing Service, I'd say this house will definitely sell."