The Los Altos Eichler homes in the archive record center on two subdivisions of Joseph Eichler's later years: Fallen Leaf Park, Tracts 4240 and 4241, dated 1967–1969 and built by J.L. Eichler Associates, and San Antonio Court, Tract 5493, dated 1974 and built by Alsco Homes. Both appear in the project index of Claude Oakland's firm at UC Berkeley, and county assessor data, as published by the Los Altos Hills County Fire District, lists 46 parcels in the two Fallen Leaf Park tracts and 9 in San Antonio Court's.
This post covers what the archive records about the two subdivisions, the "L" model codes in their files, what county and city parcel data show about the houses today, and what to check before you change one. It is architecture and history, not a market report. For the city as a whole, see our Los Altos mid-century modern page, and for the rest of the South Bay, our Silicon Valley Eichler neighborhoods by city.
What the archive records
The Oakland & Imada Collection at UC Berkeley's Environmental Design Archives documents Claude Oakland's firm and its predecessor, Claude Oakland & Associates. Its finding aid says Eichler project records make up the bulk of the collection, in the form of files, photographs, slides and drawings.
The collection's project index has a subdivision row for each Los Altos tract:
Fallen Leaf Park. Development "Tracts 4240, 4241, Clay Dr," dated 1967–1969 and filed as a residential subdivision. It names J.L. Eichler Associates, Inc. as developer. Files are spread across manuscript boxes 3, 4 and 9, drawings box 14, folder 171, with flat-file entries FF 166–167, and photographs box 12, folder 117.
San Antonio Court. Development "Tract 5493," dated 1974 and filed as a residential subdivision. It names Alsco Homes, Inc. as developer. Files are in manuscript box 11, folder 86, and drawings box 14, folder 210, with FF 259.
Neither row names an architect, so we don't assign one.
The finding aid also dates Eichler's development companies: Eichler Homes, Inc. from 1950 to 1968, J.L. Eichler Associates, Inc. from 1966 to 1972, Nonpareil Homes, Inc. in 1967 and Alsco Homes, Inc. from 1973 to 1974. Fallen Leaf Park falls in the J.L. Eichler Associates years. San Antonio Court falls in the Alsco Homes years, and the finding aid says Oakland's association with Eichler lasted until Eichler's death in 1974, the year the index gives for the tract.
The "L" model codes
The finding aid says Eichler models are named with a subdivision location code plus a model number, and gives MC-184, Marin County model 184, as its example. The index's model-location sheet assigns L to "Fallen Leaf Park, San Antonio Court" in Los Altos. A separate line on the same sheet assigns L to Diamond Heights in San Francisco, so the letter alone doesn't place a plan.
Fallen Leaf Park lists 24 codes, from L-13 to L-275, among them L-134, L-134R and L-134M, and L-214 and L-214OK.
A general "L models" row, dated 1967–1969 and 1974 and naming both J.L. Eichler Associates and Alsco Homes, lists 18 more, from L-3 to L-314.
San Antonio Court lists seven: L-294, L-344, L-344A, L-405, L-405A, L-414 and L-425.
The index doesn't explain the letters after the numbers, so we won't guess at them. It does show plans moving between places. L-215M, one of Fallen Leaf Park's codes, also turns up in the model list for Sunnyvale's Rancho Sans Souci tract. A 1968 entry for a lot in "Fallen Leaf Park No. 2" lists MC-574, a code with the Marin County prefix. And S-154, with the prefix the sheet gives to Sunnyvale's Primewood, appears on a 1969 entry for "Walnut Creek/Los Altos" and on a 1971 Los Altos lot in Loucks Manor No. 1, Tract 577.
Other Los Altos entries in the index
Beyond the two subdivisions, the index has a cluster of smaller Los Altos projects from the same years, all with J.L. Eichler Associates as developer:
"Almond Ave Houses," dated 1969, and a separate 1969 house on Almond Avenue listed with model L-314R.
"J.L. Eichler Associates, Inc.: Houses for Los Altos," dated 1968.
"J.L. Eichler Associates, Inc.: Offices," a commercial project in Los Altos dated 1969.
The city's parcel layer records two Almond Avenue houses with a 1969 build year, but the index gives no lot numbers, so we can't match them to the entries. The index also has single-house entries in Los Altos Hills from 1966 to 1972, with no subdivision row there.
Fallen Leaf Park in the county records
The Los Altos Hills County Fire District publishes a parcel layer, updated October 2026, that carries county assessor fields, including the recorded tract number. It confirms both Fallen Leaf Park tracts on the county assessor's map book 318, page 20:
Tract 4240: 24 parcels, 17 on Clay Drive, 3 on Alexander Way, 3 on Fallen Leaf Lane and 1 on Alexander Court. Build years are 1967 (2), 1968 (21) and 1969 (1). Twenty-three are recorded as one story and one as two. Bedrooms are four (12), five (8) or three (4). The median recorded size is about 2,480 square feet, from about 1,960 to about 3,360, and the median lot is about 10,520 square feet.
Tract 4241: 22 parcels, 14 on Clay Drive, 6 on Candace Way and 2 on Alexander Way. Build years are 1968 (10) and 1969 (11), plus one house from 1956. Nineteen are one story and three are two. The median recorded size is about 2,490 square feet, from about 1,910 to about 2,990, and the median lot is about 10,230 square feet.
The same map page holds a third group that the archive doesn't name: Tract 4604, 22 parcels built in 1969 and 1970 on Alexander Way, Candace Way and Fallen Leaf Lane, 16 of them recorded as two stories. No record we read ties it to Eichler, so don't assume a 1969 or 1970 house on those streets is one of his.
The City of Los Altos parcel layer adds the zoning. Every parcel on that map page is zoned R1-10, with a general plan land use of "Single-Family, Medium Lot," no overlay, and no historic resource flag. These are today's recorded figures, additions included, not the original plans.
San Antonio Court in the county records
The fire district's layer puts all 9 parcels of Tract 5493 on Parsons Way, on assessor's map page 170-47. Seven carry a 1974 build year, matching the archive's date. The other two are older, from 1947 and 1960. Eight are recorded as one story and one as two. Seven have four bedrooms. The median recorded size is about 2,340 square feet, from about 2,140 to about 3,210, and the median lot is about 11,410 square feet.
"San Antonio Court" is the subdivision's name in the archive. It isn't a street name in the parcel records, so search by tract number or by Parsons Way. The city's layer zones all nine parcels R1-10 with no overlay and no historic resource flag.
The city rules that apply
Los Altos has a single-story overlay. The city's parcel layer shows the R1-S overlay on 361 parcels, including 1950s houses on another part of Fallen Leaf Lane, but on none of the lots in Tracts 4240, 4241 or 5493. The layer flags 94 parcels citywide as historic resources, and none of them is in these tracts.
Los Altos's city website blocked our automated reads, so we couldn't check its planning or Historical Commission records for these tracts, and this post doesn't describe any local design rules for them. Overlays and listings can change. This is general information, not legal advice. Ask the city's planning division what applies to a specific lot before you design anything.
What to check on a Los Altos Eichler
The tract. Confirm Tract 4240, 4241 or 5493 and the build year on the county assessor's record.
The model. Ask the Environmental Design Archives for the Fallen Leaf Park or San Antonio Court files and compare the plans with the house.
The neighbors. Houses on the same streets from Tract 4604, or from before 1967, aren't part of these tracts. Don't use them as a guide to what an Eichler lot allows.
The record. Compare the recorded bedrooms and square footage with the plan to see what has been added. Our guide to checking permit history walks through the next step.
The zoning. Check the parcel's zoning and overlay with the city before you plan a second story or an addition.
Frequently asked questions
Where are the Eichler homes in Los Altos?
The UC Berkeley archive lists two Los Altos subdivisions: Fallen Leaf Park, Tracts 4240 and 4241, whose parcels the county data puts on Clay Drive, Alexander Way, Alexander Court, Candace Way and Fallen Leaf Lane, and San Antonio Court, Tract 5493, on Parsons Way. It also lists smaller projects, such as houses on Almond Avenue.
Who built Fallen Leaf Park?
The archive's subdivision row names J.L. Eichler Associates, Inc. as developer and dates the tract 1967–1969. It names no architect.
When was San Antonio Court built?
The archive dates it to 1974, under Alsco Homes, Inc., and county records give seven of its nine parcels a 1974 build year.
Is Fallen Leaf Park a historic district?
The city's parcel layer shows no overlay and no historic resource flag on any of its lots. We couldn't read the city's own historic records, so ask the planning division for the current status.
Related reading
Eichler Homes Company History: The Builder Behind the Tracts
Diamond Heights Eichler History: Claude Oakland's Hillside Homes
More guides on this topic: Eichler Neighborhoods & Tract Histories
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Curious about a Los Altos Eichler's tract, model or plans? Call or text the Boyenga Team at Compass at (408) 373-1660 or (650) 383-8606, or contact the Boyenga Team online.
