Atherwood — Redwood City

The Atherwood tract in Redwood City stands as one of the most historically significant developments in the Joseph Eichler portfolio. Built between 1950 and 1951, it represents the true “Genesis Era,” when Eichler moved away from building conventional ranch houses and fully committed to modernist architecture. This tract marks the inflection point where Eichler transitioned from speculative builder to architectural developer, embedding modernism into suburban production housing. It is one of the earliest and clearest expressions of his vision to democratize architect-designed homes for the middle class.

The land that became Atherwood was originally part of the Selby Estate, owned by P.W. Selby, a prominent Peninsula landholder whose holdings reflected the broader transition of the San Mateo County region from large private estates into postwar suburban subdivisions. This pattern of subdivision was common across the Peninsula in the late 1940s and early 1950s, as demand for housing surged following World War II.

Joseph Eichler acquired the approximately 15-acre parcel in 1950. At the time, the site was largely wooded and strategically positioned along the border of Atherton, one of the most affluent communities in the region. This proximity directly influenced the naming of the tract as “Atherwood,” a hybrid of Atherton and Redwood City, signaling both aspirational adjacency and geographic identity.

Development of Atherwood was primarily backed by FHA (Federal Housing Administration) and VA (Veterans Affairs) financing, which was critical to Eichler’s broader business model of delivering modern architecture to middle-income buyers. However, because this was such an early and unconventional project, Eichler encountered resistance from federal underwriting standards.

The FHA initially rejected key design elements—particularly the flat and butterfly roof forms—on the grounds that they posed drainage and durability risks. Eichler was forced to provide engineering validation and structural assurances to prove that these modernist forms were viable. This battle was pivotal, as FHA approval ultimately legitimized modernist tract housing and enabled Eichler’s ability to scale across California.

Atherwood is a pure collaboration with Robert Anshen and Steve Allen of the firm Anshen + Allen. This partnership is foundational in Eichler history, as it was Anshen who pushed Eichler beyond basic construction into fully realized architectural design.

This tract reflects a direct translation of Frank Lloyd Wright’s Usonian principles into tract housing, emphasizing simplicity, horizontality, and integration with the landscape. Unlike later Eichler developments that incorporated multiple architectural firms, Atherwood is stylistically cohesive and represents an early, unrefined but ambitious design language.

Atherwood showcases several defining early-era Eichler concepts. The butterfly roof, one of the tract’s most iconic features, consists of two inward-sloping roof planes that create a central valley. This design allowed for higher clerestory windows and increased natural light penetration, while also creating a striking architectural profile that distinguished the homes from traditional suburban forms.

The structural system is based on post-and-beam construction, though in a heavier and less refined form than later Eichler iterations. This system allowed for non-load-bearing exterior walls, enabling extensive use of glass and open interior layouts.

Rather than the fully developed atriums seen in Eichler’s 1960s work, Atherwood homes feature early courtyard concepts, loggias, and semi-enclosed outdoor spaces. These elements function as precursors to the atrium model, establishing the indoor-outdoor relationship that would become central to Eichler design.

The tract consists of 64 homes arranged in a loop-style configuration designed to minimize through traffic and create a cohesive neighborhood identity. This layout reflects Eichler’s early thinking around community-oriented planning, emphasizing privacy, uniformity of design, and integration with the natural landscape.

The neighborhood’s scale is relatively small compared to later Eichler developments, reinforcing its role as an experimental proving ground rather than a fully optimized production model.

Construction materials in Atherwood reflect an early 1950s modernist-industrial palette, balancing cost efficiency with architectural intent. Exterior siding primarily consists of grooved redwood, often finished in darker earth tones to blend with the surrounding oak environment and reinforce a natural aesthetic.

Interior ceilings utilize redwood tongue-and-groove planks that extend seamlessly from interior spaces to exterior eaves, creating continuity between indoor and outdoor environments. This material choice is a hallmark of early Eichler construction and reinforces the horizontal visual language.

The homes are built on slab-on-grade foundations incorporating an early steel-pipe radiant heating system. This system was innovative at the time but would later prove problematic. Flooring materials were selected to complement radiant heat performance, typically including 9x9 asphalt tile or cork, both of which conduct heat efficiently.

Glass systems consist of large floor-to-ceiling plate glass panels, installed prior to the widespread use of tempered safety glass. These panels were often set directly into wood framing members, maximizing transparency but offering limited thermal insulation by modern standards.

The Atherwood tract includes approximately 64 homes, with the most notable being the butterfly roof model that became emblematic of the development. Homes generally range from 1,100 to 1,350 square feet, reflecting modest postwar sizing combined with efficient spatial planning.

The tract received national recognition when it was awarded “Subdivision of the Year” in 1950 by Architectural Forum, a major validation of Eichler’s architectural and development approach. This recognition positioned Eichler as a serious innovator in the housing industry and helped catalyze his expansion throughout Northern California.

Atherwood’s early-stage experimentation resulted in several notable technical issues. The most significant was the failure of the steel radiant heating प्रणाली embedded in the slab. These steel pipes were highly susceptible to electrolysis and corrosion, leading to leaks that were difficult and costly to repair. As a result, many homeowners eventually abandoned the original system in favor of baseboard or forced-air heating.

Another major challenge involved the butterfly roof design itself. The FHA initially resisted approving these roofs due to concerns about water drainage and debris accumulation. Eichler’s need to overcome this skepticism marked a critical moment in proving the viability of modernist residential architecture within institutional financing frameworks.

Additional performance issues included minimal insulation, thermal inefficiency due to large glass expanses, and long-term maintenance challenges associated with flat and low-slope roofing systems.

Primary documentation for Atherwood can be found in several key archives. The Environmental Design Archives at the University of California, Berkeley holds the Anshen + Allen collection, including original blueprints, elevations, and early design studies for the butterfly models.

Local parcel-level and permitting records are maintained by the Redwood City Planning Division, where certificates of occupancy and subdivision filings from 1950–1951 can be accessed.

Additional marketing materials, brochures, and historical documentation are preserved by the Eichler Network, which maintains one of the most comprehensive private archives of Eichler developments.

Atherwood occupies a singular position within the Eichler portfolio. It is an early, experimental tract defined by high architectural ambition and relatively low refinement compared to later developments. It represents the moment where Eichler proved that modernist design could be standardized, financed, and sold at scale.

This tract is not the polished expression of Eichler’s later work but rather the foundation upon which his entire development model was built. It is the prototype that validated architect-led suburban housing and set the stage for the expansive Eichler communities that followed throughout California.

Atherwood is not just another Eichler neighborhood—it is the origin point of Eichler’s architectural and development philosophy. It represents the convergence of land transition, financing innovation, architectural experimentation, and material application. Every later Eichler tract traces back to the lessons learned here, making Atherwood one of the most important modernist housing developments in California history.