The ideal floor plan — Tri-Valley tract homes in the 1960s and ’70s

By the late 1960s, a particular floor plan had quietly taken over the Tri-Valley suburbs. Whether you were touring model homes in Pleasanton, Dublin, San Ramon, or Livermore, the layout kept appearing again and again: formal rooms in front, casual living in back, and a private bedroom wing tucked to the side.

Defining the ideal suburban floor plan

Most versions followed the same basic formula:

  • Formal living and dining rooms near the entry

  • An open kitchen connected to the family room

  • Informal breakfast space for daily life

  • A separate bedroom wing for privacy

  • A rear-facing primary suite

  • 3 or 4 bedrooms in roughly 1,400 to 1,800 square feet

Builders constantly tweaked the details, but the core layout remained remarkably consistent across the Tri-Valley during the late 1960s and early 1970s.

Where it began: Duc & Elliott (1965)

Duc & Elliott may have been the first Tri-Valley builder to fully crystallize the layout with the Mount Diablo model at Villa de San Ramon in Dublin. The design was modern without feeling radical: public entertaining spaces near the front door, everyday family life gathered around the kitchen, and bedrooms separated into their own private wing.

4 bedrooms, 2 bathrooms, up to 1,740 sq. ft.

Vintage floor plan for the Mount Diablo model home, showing open public areas at the front, semi-private family spaces near the kitchen, and a fully separated rear bedroom wing—designed to meet the needs of 1960s suburban families.
The Mount Diablo had everything families were looking for: open public areas, cozy semi-private spaces, and a fully separated sleeping wing.

Refining the formula: Kay Homes (1966)

Kay Homes brought refinement to the design with Plan 424, introduced at Rancho Solano in San Ramon. The highlight? A sunken sitting area in the primary suite—pure luxury. A year later, they introduced a 3-bedroom version that traded the breakfast nook for a bar, adapting the plan for smaller households.

4 bedrooms (or 3), 2 bathrooms

Vintage floor plan for Plan 424 by Kay Homes, introduced in 1966. The layout includes formal living and dining spaces at the front, a central kitchen with adjacent family room, and a private rear wing with four bedrooms. A sunken sitting area in the primary suite adds a touch of mid-century luxury.
Floor plan for Plan 424 by Kay Homes at Rancho Solano. This model featured a sunken sitting area in the primary suite and flexible layout options that balanced luxury and functionality.

Expanding the idea: Morrison Homes (1969)

By 1969, Morrison Homes had fine-tuned the concept with the Woodhaven House model in Pleasanton Valley. The standout feature? A flexible fourth bedroom that could be converted into a retreat off the primary suite—a forward-thinking touch that echoed modern luxury.

4 bedrooms or 3 with retreat, 2 bathrooms, 1,808 sq. ft.

Vintage floor plan for the Woodhaven House by Morrison Homes, introduced in 1969. The layout includes formal living and dining areas at the front, an open kitchen and family room at the rear, and a private bedroom wing. Optional fourth bedroom could be used as a sitting room or retreat off the primary suite.
Floor plan for the Woodhaven House by Morrison Homes. Featured a large family room and a bedroom wing positioned off the main entry. Morrison also offered the option to convert bedroom 4 into a primary suite retreat.

Luxury embellishments: Mackay Homes (1971)

Mackay Homes brought architectural grace to the design with the Carmel model at Del Prado in Pleasanton. The oversized central hall allowed for better circulation, giving active families room to move without bottlenecks.

4 bedrooms or 3 with a retreat, 2 bathrooms, 1,790 sq. ft.

Vintage floor plan for the Carmel model by Mackay Homes, introduced in 1971. The layout centers around an extra-wide hallway that connects formal living and dining areas at the front, an open kitchen and family room at the rear, and a private bedroom wing, with the primary suite positioned at the back.
Floor plan for the Carmel model by Mackay Homes at Del Prado. This design featured a generous central hallway connecting all living areas, creating a smooth flow ideal for busy family life.

A bold take: H. C. Elliott (1973)

H.C. Elliott’s early version of The Huntington, while innovative, had two notable flaws: the bedroom wing was visible from the front door, and it lacked a formal dining area. But its circular kitchen design was an attention-grabber.

4 bedrooms, 2 bathrooms, 1,479 sq. ft.

Vintage floor plan for the original Huntington model by H.C. Elliott, introduced in 1973. Features a central circular kitchen, open living areas, and a bedroom wing positioned off the main entry. Lacks formal dining space and includes a primary suite at the rear.
Floor plan for the original Huntington model by H.C. Elliott at Somerset West. Known for its round kitchen and open layout, the plan broke new ground despite its unconventional visibility of private spaces.

A refined reboot: H. C. Elliott (1973)

Later in 1973, H.C. Elliott corrected earlier missteps with a new version of The Huntington, launched at Vintage Hills in Pleasanton. This plan finally included a formal dining room and visually separated the private wing from the public space.

4 bedrooms, 2 bathrooms, 1,699 sq. ft.

Vintage floor plan for the 1973 Huntington model by H.C. Elliott, introduced at Vintage Hills in Pleasanton. Features include formal living and dining spaces, an open kitchen and family room at the rear, and a private bedroom wing with a rear-facing primary suite. A new partition wall separates private areas from the front entry for added privacy.
Floor plan for the revised Huntington model by H.C. Elliott at Vintage Hills. This updated version added a formal dining room and visually separated the bedroom wing from the entry for improved privacy and flow.

A legacy that continues

Decades later, these floor plans still feel surprisingly modern. The kitchens remain central gathering places. The separation between public and private rooms still works for family life. And across the Tri-Valley, buyers continue gravitating toward these homes—not because they are flashy, but because the layouts simply make sense.

Between the mid-1960s and early 1970s, builders across Pleasanton, Dublin, San Ramon, and Livermore arrived at nearly the same conclusion about suburban living. The result became one of the defining floor plans of the Tri-Valley’s mid-century neighborhoods.

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