California bungalow is an alternative name for the American Craftsman style of residential architecture, when it was applied to small-to-medium sized homes rather than the large "ultimate bungalow" houses of designers like Greene and Greene. California bungalows became popular in suburban neighborhoods across the United States, and to varying extents elsewhere, from around 1910 to 1939. Bungalows are one or one and a half story houses, with sloping roofs and eaves with unenclosed rafters, and typically feature a dormer window (or an attic vent designed to look like one) over the main portion of the house. Ideally, bungalows are horizontal in massing, and are integrated with the earth by use of local materials and transitional plantings. This helps create the signature look typically associated with the California bungalow. Bungalows commonly have wood shingle, horizontal siding or stucco exteriors, as well as brick or stone exterior chimneys and a partial-width front porch. Larger bungalows might have asymmetrical "L" shaped porches. The porches were often enclosed at a later date, in response to increased street noise. A "California" bungalow (except in Australia, see below) is not made of brick, but in other bungalows, most notably in the Chicago area, this is commonplace due in large part to the weather. A variation called the "Airplane Bungalow" has a much smaller area on its second floor, centered on the structure, and is thought to look like the cockpit of an early airplane. True bungalows do not include quarters for servants, and have a simple living room, entered directly from the front door, in place of parlors and sitting rooms, as well as a smaller kitchen. The focal point of the living room is the fireplace, and the living room often has a broad opening into a separate dining room. All common areas are on the first floor with cozy atmospheres. Though the ceilings are lower than in homes of Victorian architecture, they often feature redwood beams and are usually higher than in ranches and other homes built later.