Los Altos Hills jumbo loans and 2026 loan limits.

Los Altos Hills became a town in 1956, and its founders wrote two rules that still shape it: a minimum lot of one acre, and no commercial district. The town has no shopping district of its own. Foothill College, on El Monte Road, is the largest campus inside its borders. Interstate 280 runs through the middle, with Los Altos on the valley side and open-space preserves in the hills beyond.

The homes are houses on an acre or more, reached by winding two-lane roads without sidewalks or street lights. They range from ranch houses of the 1950s and 1960s to large, recently built houses with guest houses, pools and courts. Many lots are sloped, and oak trees and views of the Bay are common. A network of public paths for walkers and riders runs along roads and between lots, and some properties still keep horses. Hidden Villa, a farm and wilderness preserve, is on Moody Road at the town’s western edge.

The land as much as the house. On an acre of hillside, a lender’s questions are about slope, access, sewage and what else stands on the lot.

Not every home is on a public sewer. Many use a septic system, and a lender’s appraiser notes it. Ask the seller for inspection and pumping records, because replacing a failed system on a slope is costly. Some homes are on private roads shared with neighbors, and a lender may ask for the recorded maintenance agreement.

The town limits how much of each lot can be covered by buildings and paving, using a formula that counts the lot’s slope. A steep acre allows less than a flat one. That matters if you plan to add on, and it affects value, so appraisers look at usable land and not just acreage. Many lots also carry a recorded easement for a public path.

Large individual properties are hard to compare. Expect the appraisal to take longer than in a tract neighborhood, and expect a second appraisal on a larger jumbo loan. The town has adopted a fire hazard zone map, so check the address and collect insurance quotes early. A buyer who plans to tear down and rebuild needs a construction loan or savings for the building work, because a purchase loan covers the property as it stands.

The part of Los Altos Hills on the valley side of Interstate 280 is the gentler part of town. It lies along Fremont Road, Burke Road, Robleda Road and Concepcion Road, next to the city of Los Altos, and holds the Town Hall.

Slopes here are rolling, not steep, and many lots are close to level across most of their acre. That shows in what can be built: more of the lot is usable, so the town’s formula allows more floor area and paving than on a steep site. Houses include original single-story ranch homes, which are often bought for the land, and large newer houses. An appraiser must decide whether an older house adds value or whether the sale is really of a building site. Tell Sam which it is, since a plan to rebuild changes the kind of loan. Some homes on this side are connected to a public sewer and others use septic systems, so confirm it. The village shops of Los Altos are a short drive away, and level lots are easier for an appraiser to compare than steep ones, which helps an appraisal.

West of Interstate 280 the town climbs toward the Santa Cruz Mountains. Page Mill Road, Altamont Road, Moody Road and Elena Road wind through steeper, more wooded country. Byrne Preserve and the town’s Westwind Community Barn are on Altamont Road, and Arastradero Preserve in Palo Alto and Rancho San Antonio lie close by.

Lots here are often larger than an acre, but a good part of each may be too steep to build on. Houses are set on knolls and benches for the view, at the end of long driveways. Septic systems and private roads are part of many properties on this side, and some properties have a well for irrigation. A lender’s appraiser reports each of these. Ask for the septic records, the road agreement, and any geological report done for the house. This side of town is close to open grassland and oak woodland so check the town’s fire hazard map, and make homeowners insurance the first thing to line up. Sales are few and the properties differ widely, so allow extra time for the appraisal. Horse facilities are valued as part of a home, as long as they are for your own use.