Eichler research becomes more useful when a number comes with an explanation. A historic district, a homeowners association and a real-estate search area can cover different ground even when they share a familiar neighborhood name. The Data Lab opens the calculation, identifies the source and asks what the result can actually help you decide. This first study examines the difference between a development count and a broader community total.
The Lucas Valley Homeowners Association’s history reports 435 Eichler homes developed in Upper Lucas Valley from 1963 through 1967, alongside 103 homes built by other builders. Together those two reported groups total 538 homes. Dividing 435 by 538 gives 80.9%, rounded to one decimal place. The remaining 19.1% represents the other-builder group in that same historical account. Read the association’s history.
The chart describes the composition of those 538 historically reported homes. It is not a measure of today’s listings, an inventory of surviving original buildings or the share of all homes in Marin County. A current property search can include homes outside the source’s scope. Before attaching the percentage to an address, establish that the property belongs to the population being described.
Imagine comparing two listings whose descriptions both say Lucas Valley. The useful next step is to establish each home’s builder and location from property-specific records, rather than assign the neighborhood-wide percentage to either house. A proportion can explain the community’s development story; it cannot authenticate an individual home. That is the distinction between a memorable statistic and evidence you can use.
For Greenmeadow in Palo Alto, California’s Office of Historic Preservation describes 243 single-family homes and a separate community-center complex, with the subdivision developed in 1954–1955. This is a district description, not the same population definition as the Lucas Valley association’s historical account. Read the Greenmeadow state record.
We keep these numbers in separate contexts rather than turn them into a league table. A larger count does not establish stronger demand, a price premium, better amenities or more homes for sale. The interesting comparison is how each source defines the place. Continue with the Greenmeadow portrait and Upper Lucas Valley portrait to connect the numbers to architecture and setting.
For a buyer, a useful research brief pairs the address with the source that supports its development history and the questions still unresolved. For a seller, it separates the documented architectural story from current pricing evidence. For an owner, it becomes a record you can update when better plans, permits or photographs become available. Keep the source link and review date beside each fact so a future reader can retrace your work.
The Boyenga Team’s Property Nerds and NextGenAgents approach is to explain the evidence and its limits. Choose a time for a Google Meet conversation, call or email us, or send a property question. Bring the address, the number you want to understand and the decision it should inform.
Source review: October 31, 2026. Calculations by Eichler Nerds from the two counts in the LVHA history: 435 + 103 = 538; 435 ÷ 538 × 100 = 80.9%; 103 ÷ 538 × 100 = 19.1%. These are historical composition figures, not current market statistics.