These designs are from a Northcrest booklet offered to potential purchasers in the late 50's early 60's by P&H Realty.
The intitial offering provided at least six designs (two traditional and four MCM) on 300 wooded lots. The available designs expanded to include additional styles such as A-Frames and unique houses through three additional phases.
This design is one of two multi-level Traditional concepts provided by the builder during the first Northcrest building phase. As with most of the builder's floor plans, the house is divided into left-right halves, with stacked rooms on either the left or right and living/dining/kitchen on the opposite half. The carport is located to the side opposite the living/dining/kitchen with the stacked half between - the carport featured tongue-and-groove ceilings and exposed beams. Many of the carports have been converted into garages or family rooms. This style has four-sided brick or siding with square columns as suppport for a front porch. Windows are usually shuttered and the roof peaks are tall.
I've only viewed a single example from the garage, so I'm not sure what the interiors are like - I suspect a mixture of MCM and 70's styling - including the "Jack and Jill" bathrooms as mentioned previously. I long suspected that many of these units also have tongue-and-groove ceilings and galley kitchens, however I've been informed that most if not all of these models have smooth ceilings and an attic space. Also the kitchens appear to be more traditional, flat against one wall instead of the galley-style featured in most MCM styled Northcrest homes.
This style is on the high end according to the booklet with an unadjusted sales price of $23,450 (the high-end was a Mid Century Modern listed for $24,600 - style 6 - and the low-end a contemporary at $19,750 - style 3).
Thanks to Bob B. for additional information.