Buying Land in Los Altos Hills: What to Check Before You Offer

Los Altos Hills is unusual. There are no sidewalks, no streetlights, and no commercial strip — the town is residential by design, built around large lots, open space, and a network of pathways rather than pavement. That character is exactly what draws buyers, and it is also why a parcel here rewards diligence more than almost anywhere else on the Peninsula. Two lots at the same price can support very different homes. Here is what I look at before advising a client to write an offer on land in the Hills.

Start with what the town lets you build

In much of Silicon Valley, buyers assume a big lot means a big house. In Los Altos Hills, how much you can build is governed by formulas tied to the size and slope of your specific parcel — not just its acreage. The town limits both the footprint you can develop and the total floor area of the home, and steeper or more constrained lots yield less than their raw size suggests. Before you fall for a view, understand the buildable area the town's standards actually permit on that parcel. It is the single number that most often surprises buyers.

Water in, water out

Because the Hills is not a dense urban grid, infrastructure that most Peninsula buyers take for granted deserves real attention:

• Sewer versus septic. Many properties rely on private septic systems rather than a public sewer connection. A failing or undersized system, or soils that won't pass a percolation test, can quietly cap what you're allowed to build — and cost meaningfully to remedy.
• Water source and pressure. Confirm the water provider and, in fire-conscious hillside areas, whether supply and pressure meet current requirements for the home you have in mind.
• Drainage and runoff. Hillside lots move water. How a parcel drains affects grading design, neighbor relations, and permitting.

Slope, soils, and trees

Grade drives cost. A gently sloping pad and a steep, engineered hillside can look similar in a listing photo and behave completely differently once you're paying for retaining walls, deeper foundations, and geotechnical work. Order your read on the soils early. Protected and heritage trees — oaks especially — are cherished in the Hills and can constrain where a building envelope sits; plan around them rather than against them.

Access, pathways, and easements

Confirm how you legally reach the property and whether any portion is shared. The town's pathway system, utility easements, and shared driveways all shape where a home can go and how it lives. These details rarely kill a good lot, but discovering them after you own it is an expensive way to learn.

Budget for the site, not just the house

The most common mistake I see is budgeting for the home and treating the land as finished the day it closes. On a Hills parcel, the site itself often carries real cost before a single wall goes up: grading and retaining, a compliant septic system, utility runs, tree protection, geotechnical and drainage work, and the design and permitting time to tie it all together. None of this should scare a well-prepared buyer — but it should be in the number you underwrite. A parcel that looks expensive next to a "cheaper" one two streets over is sometimes the better buy precisely because its site work is simpler.

The way I underwrite a Hills lot

I evaluate land the way a developer does: I start from the finished home a buyer actually wants, work backward through what the parcel and the town's standards will permit, estimate the cost to get there honestly, and only then decide what the dirt is worth today. A view and an address are worth paying for — but they're worth paying the right number, set by what you can build, not by what's next door. When the buildable envelope, the utilities, and the site work all line up, Los Altos Hills is as good as land gets on the Peninsula.

Payne Sharpley is a Silicon Valley real estate agent with Intero | Forbes Global Properties and co-founder of Citis, a housing-entitlement intelligence platform. CA DRE #02195155. This article is general information as of July 2026, not legal, engineering, or land-use advice; development standards vary by parcel and change over time — confirm current requirements with the Town of Los Altos Hills.