So, do you really need us to tell you that outdoor kitchens are no longer a trend, but a fact of life for high-end homeowners? The move from backyard kettle grills to fully applianced outdoor living spaces is well documented, but new high-end offerings promise to take these designs to a newly luxurious level.

Once seen as a perk only the wealthiest homeowners could afford, the outdoor kitchen is fast becoming a standard amenity for a much broader market. A recent statistic from Consumer Reports magazine proves this point: The magazine estimates 1.2 million U.S. households installed a fully functional outdoor kitchen between 2006 and 2007. And manufacturers say homeowners are enjoying their outdoor investments well beyond the traditional three-month summer season.

“What people really are after is a year-round outdoor kitchen,” says Bob Lewis, assistant vice president for product development at Diamond Bar, Calif.-based Dacor. “It really has opened up the realm of appliances quite a bit.”

Other industry pros note that, though grills and refrigerators might be prominent players in the design of these spaces, plans need to reflect the broader role outdoor kitchens are playing in homeowners’ lives.

“This progress is just a logical extension of the living room,” says Ann Rottinghaus, marketing communications manager for Oak Brook, Ill.-based Elkay. “It’s about entertainment, and so, by logical extension, it’s a gathering place.”

As design for these outdoor spaces has become increasingly sophisticated, so has the market for the equipment that makes them work. Outdoor kitchens have become almost as complicated to install as their indoor counterparts, so, increasingly, manufacturers are marketing to designers, builders and remodelers, in addition to the homeowners who are signing the checks.

“I would imagine that home-owners would want to bring in someone professional to do it right,” Rottinghaus says.

Turning up the Heat

The grill remains the center of today’s outdoor kitchen, but today’s grills bear little resemblance to yesterday’s old kettle-shaped charcoal models. For example, Viking’s new upgraded E-Series features 25,000-Btu burners, a heavy-duty rotisserie motor with two forks and chrome-plated warming racks. True outdoor chefs can add an infrared burner that reaches temperatures topping 1,500 degrees, providing a super-hot surface for flash-searing meats to seal in their juices. To emphasize just how upscale outdoor kitchens have become, these ultra-premium models retail for approximately $6,000.