What is Hillsborough, California?

Hillsborough is a residential-only town of about 6.17 square miles on the San Francisco Peninsula, roughly 17 miles south of downtown San Francisco. It has no commercial zoning, which means no stores, no offices, no restaurants, and no condominiums or apartments inside town limits. Every parcel is a single-family home, and the town has kept it that way since it incorporated on May 5, 1910.

That single decision explains most of what buyers notice here. Streets have no sidewalks. Lots run half an acre and up. Homes sit behind gates, walls, and mature oak and redwood canopy. The 2020 Census counted 11,387 residents across the whole town, a density of about 1,847 people per square mile, which is low for a place this close to a major city. Buyers who want walkable retail at the end of the block should look at Burlingame or San Mateo. Buyers who want privacy, land, and one of the strongest public school districts in California should look here.

Below you can browse current Hillsborough listings, or contact The Knight Group directly if you want the off-market picture. In a town where a single neighborhood can post fewer than five sales in a calendar year, what is publicly listed is rarely the whole inventory.

Why is Hillsborough considered one of the most exclusive towns on the Peninsula?

Scarcity, enforced by ordinance. The town caps supply on purpose. There is no mechanism to add density because there is no zoning category that permits it, and the housing stock is effectively fixed at the number of single-family lots that were subdivided decades ago. When demand rises, price is the only variable that can move.

The wealth data reflects it. Bloomberg’s 2019 analysis ranked Hillsborough the fifth richest town in the United States, and median household income exceeded $250,000 as of 2023. Hillsborough is routinely grouped with Atherton and Woodside as the Peninsula’s three most exclusive addresses.

The character differs from Atherton, and that matters when choosing between them. Atherton is flat and heavily gated. Hillsborough runs from flat lower-elevation blocks near El Camino Real up into steep, wooded hillside along the Interstate 280 corridor. You can buy a flat lot near downtown San Mateo or a one-acre hillside parcel with Bay views and a winding private approach. Both are Hillsborough. They are not the same purchase.

What do homes in Hillsborough actually cost?

Expect the mid seven figures as the working center of the market. Publicly reported market summaries put the Hillsborough median sale price at roughly $5.38 million and the average at roughly $6.18 million as of June 2026, with most transactions falling between $4.5 million and $10 million and a long tail above that.

The spread between neighborhoods is wide and it is not random. Lower Hillsborough blocks closest to Burlingame Avenue and the Caltrain corridor carry the highest per-square-foot pricing in town. Upper Hillsborough hillside neighborhoods deliver more land and more view for the dollar, with the trade-off of longer drives to everything.

One number matters more than the median here: transaction count. Several Hillsborough neighborhoods recorded fewer than ten sales in all of 2025. Some recorded one or two. When a submarket produces that few comparable sales, standard automated valuation models break down and appraisals get contentious. Pricing a Hillsborough property is an exercise in reading a handful of transactions carefully, not in running an average.

Which neighborhoods make up Hillsborough?

The town recognizes fourteen designated neighborhoods. They differ in terrain, era of construction, school assignment, and price behavior, and the differences are large enough that treating Hillsborough as one market will cost you money in either direction.

Carolands is named for the 100-room mansion completed in 1914 for railroad heiress Harriet Pullman Carolan, restored in 1998. The original 554-acre estate was subdivided in the late 1940s, and the neighborhood today is a mix of sprawling 1950s and 1960s ranch homes, older traditional properties, and newer large builds, many with Bay views. Reported 2025 data showed a median near $5.08 million across 14 sales, with an average of roughly 23 days on market, one of the more liquid submarkets in town. Browse Carolands real estate in Hillsborough.

Country Club Manor wraps the Burlingame Country Club and is the closest thing Hillsborough has to a conventional suburban grid. The terrain is flat, which makes it one of the few pockets where walking and biking are genuinely practical. Housing skews to four- and five-bedroom single-story homes from postwar subdivisions, blending Cape Cod influence with mid-century California ranch. It is also a thin market: reported data showed a single sale in 2025. See Country Club Manor real estate in Hillsborough.

Hillsborough Heights sits in lower Hillsborough within walking distance of downtown San Mateo and about two blocks from El Camino Real. Custom home construction here began in the 1920s and 1930s. Streets are flat and tree-lined, the housing stock spans vintage estates to modern rebuilds, and reported price range across recent years ran from roughly $3.8 million to $18.8 million. Days on market here have been among the shortest in town. Review Hillsborough Heights real estate.

Hillsborough Park sits north of Crystal Springs Road in upper Hillsborough on land that traces back to William Davis Merry Howard’s Rancho San Mateo. Architecture spans 1920s and 1930s Tudor and Mediterranean homes on half-acre to acre lots, 1950s and 1960s ranches, and contemporary gated estates. The Arthur and Mona Hofmann House, designed by Richard Neutra in 1937, is here. Explore Hillsborough Park real estate.

Hillsborough Oaks is one of the town’s fourteen designated neighborhood areas and trades infrequently enough that current inventory is the only reliable read on it. See what is available in Hillsborough Oaks real estate.

Hillsborough Knolls bridges the high and low sections of town, sitting between Homestead Valley to the north and Hillsborough Park to the south. Its western edge climbs into wooded hillside. A few homes from the original Rancho San Mateo era still stand along La Canada Road, but most construction is postwar because the topography discouraged earlier development. At roughly 77 homes, it is one of the tightest submarkets on the Peninsula. Check Hillsborough Knolls real estate.

Hillsborough Highlands is another of the town’s hillside submarkets, and like the smaller pockets here it turns over rarely. Current listings are the practical starting point. View Hillsborough Highlands real estate.

Lakeview occupies the western boundary of upper Hillsborough with direct access to Interstate 280. There is no lake in the neighborhood, but it borders Crystal Springs Reservoir. The area stayed sparsely populated into the 1950s, then filled in between 1950 and 1980 with ranch homes and contemporary multi-story houses on half-acre to full-acre lots along curved lanes and cul-de-sacs. It draws renovation and teardown-rebuild buyers and posted one of the higher sale counts in town in 2025. Browse Lakeview real estate in Hillsborough.

Homeplace takes its name from Home Place, the mansion of Jennie Crocker Henderson. Residential development accelerated after 1954, when the town council rejected a Ford Foundation proposal to convert the estate into a research center. The result is one of the more architecturally varied neighborhoods in town: 1950s ranches, prewar estates, Tudors, chateau-style homes, and newer neo-Tudors, ranging from four-bedroom houses to estates above 6,000 square feet on acre-plus lots. It sits roughly equidistant from downtown San Mateo and Burlingame Avenue. See Homeplace real estate in Hillsborough.

Ryan Tract is lower Hillsborough at its most convenient and its most expensive. It is the closest neighborhood to Burlingame Avenue shopping, the Caltrain station, and El Camino Real. Newhall Manor, used by U.S. Army officers during World War II, is here, as is Rose Court, which appeared in the 1971 film Harold and Maude. Reported 2025 figures put the Ryan Tract median above $11 million, the highest in town, with roughly 167 homes total and only a handful trading in a given year. Review Ryan Tract real estate in Hillsborough.

Skyfarm is one of the largest and least densely populated neighborhoods in town, spanning over a square mile of wooded hills. Its namesake mansion was built by William Crocker in 1896 as a wedding gift and has served since 1967 as the centerpiece of The Nueva School, which occupies a 33-acre campus inside the neighborhood. Narrow curving roads and difficult topography delayed development, so most homes date from the 1970s forward and skew newer than the rest of Hillsborough. Bay and hill views are common. Explore Skyfarm real estate in Hillsborough.

The remaining designated neighborhoods include Brewer/Uplands, Hillsborough Hills, Parrott Drive, and Tobin Clark. Hillsborough Hills sits in the westernmost part of upper Hillsborough near Skyline Drive and filled in after World War II as original estate owners began subdividing.

What are the zoning and building rules buyers need to know?

Hillsborough regulates form, not just use. The two rules that shape every purchase are the half-acre minimum lot size and the 2,500-square-foot minimum dwelling size. There is no path to subdividing a Hillsborough lot into two smaller ones, and there is no path to building a small house on a large lot.

Design review is real. The town operates an Architecture and Design Review Board that reviews project applications, and it meets regularly. If your plan involves a teardown, a substantial addition, significant grading on a hillside lot, or tree removal, budget both time and professional fees for that process before you write an offer. Buyers who assume a Peninsula-standard permitting timeline are the ones who get surprised.

The town also runs its own water and sewer utilities rather than buying from a regional district, and it is working through a Housing Element update covering the 2023 to 2031 planning cycle, as every California jurisdiction must. If state housing law eventually forces changes to what can be built here, that is the document where it will show up.

Which schools serve Hillsborough?

The Hillsborough City School District runs the town’s public K-8 system with four schools: North Hillsborough Elementary, South Hillsborough Elementary, West Hillsborough Elementary, and William H. Crocker Middle School. Federal data for the 2020-21 year showed roughly 1,268 students across the district and a student-teacher ratio near 13.5 to 1.

Hillsborough has no public high school of its own. High school students attend the San Mateo Union High School District, which for Hillsborough addresses generally means Burlingame High School or San Mateo High School depending on where in town you live. That assignment tracks neighborhood geography closely, and it is one of the more common reasons buyers narrow from “Hillsborough” to a specific neighborhood. Verify the current assignment with the district before you commit, because boundaries and policies change.

Independent options in and around town include The Nueva School on its 33-acre Skyfarm campus, Crystal Springs Uplands School, and the Bridge School. For families weighing a private track, proximity to these campuses is a legitimate reason to prefer one neighborhood over another.

How is the commute from Hillsborough?

Better than most Peninsula towns at this price tier, because Hillsborough sits between the two major north-south corridors rather than off to one side. Interstate 280 forms the western boundary. El Camino Real and the U.S. 101 corridor are immediately east through San Mateo and Burlingame. San Francisco is roughly 17 miles north.

Caltrain access comes from the Burlingame and San Mateo stations, both just outside town limits and closest to lower Hillsborough. Ryan Tract and Hillsborough Heights are the two areas where a rail commute is realistic without a long first leg. From Skyfarm, Lakeview, and Hillsborough Park, you are driving to the station or driving the whole way.

San Francisco International Airport is a short drive north, an asset for buyers who travel weekly and the source of the town’s most common lifestyle complaint, since portions of Hillsborough sit under approach and departure paths. Aircraft noise varies by neighborhood and elevation. If you are noise-sensitive, visit the specific property at multiple times of day. A listing photo will not tell you.

What is there to do in and around Hillsborough?

Nothing commercial inside the town, by design. Daily life runs through Burlingame Avenue and downtown San Mateo, both minutes away, and both offering the restaurant and retail density that Hillsborough deliberately does not have.

Inside the town, recreation is outdoor and residential. Hillsborough maintains roughly 238 acres of protected open space. Vista Park in Hillsborough Park was renovated in 2006 and includes sports fields, picnic areas, and playgrounds. The Burlingame Country Club anchors Country Club Manor, and Crystal Springs Golf Course sits nearby. The western edge of town borders Crystal Springs Reservoir, and the Sawyer Camp Trail along the reservoir is the region’s best-known paved recreation path, a meaningful part of the value in Lakeview, Skyfarm, and the western hillside neighborhoods.

The town’s signature civic event is the Hillsborough Concours d’Elegance, a classic car show running since 1956. Architecture is a draw in its own right: the Frank Lloyd Wright-designed Sidney Bazett Residence dates to 1939-1940, and the sprayed-concrete Flintstone House, built in 1976, is visible from Interstate 280 and is one of the most recognizable houses in Northern California.

What are the real trade-offs of buying in Hillsborough?

Four to name honestly.

Illiquidity. Individual neighborhoods here can go a full year with one or two sales. When you buy, there may be nothing else comparable for months. When you sell, your buyer pool is small and specific. Plan holding periods accordingly.

Renovation cost. The 2,500-square-foot minimum dwelling size means there is no small, cheap-to-operate housing stock. Much of the inventory was built between the 1920s and the 1970s: original systems, older foundations on hillside lots, and in many cases a full renovation budget on top of the purchase price. Get the scope priced before you close, not after.

Hillside and vegetation risk. Much of upper Hillsborough is steep, wooded, and adjacent to open space along the Interstate 280 corridor. Wildfire hazard designation, defensible space obligations, and insurance availability vary property by property in California hillside markets. Confirm the parcel’s hazard designation and get an insurance quote in writing during your contingency period.

Zero walkable retail. This is the whole point of the town for some buyers and a dealbreaker for others. Country Club Manor, Hillsborough Heights, and Ryan Tract are the closest you will get to walkability, and they are still residential-only streets.

What should sellers in Hillsborough know about pricing and timing?

Price to the neighborhood, not to the town. Reported 2025 percentage-of-list-price outcomes varied widely across Hillsborough neighborhoods, from the low 90s in some pockets to above 100 percent in others. A town-level median tells you almost nothing about how your specific street is behaving.

Thin comparable data also changes the preparation calculus. When only a few homes trade per year in your neighborhood, your listing effectively sets the comp. Presentation, pre-listing inspection work, and a defensible pricing narrative carry more weight than in a market with fifty recent sales to anchor against.

Timing matters less than in volume markets. Exposure matters more. The buyer for an $8 million hillside estate may not be actively searching in your zip code, and reaching that buyer takes deliberate outreach beyond a standard MLS listing. That is where most Hillsborough sellers leave money on the table.

Frequently asked questions about Hillsborough real estate

Are there any condos or townhomes in Hillsborough?

No. Hillsborough has no commercial zoning and no multi-family zoning, so there are no condominiums, townhomes, or apartment buildings within town limits. Every residence is a detached single-family home. Buyers who want attached ownership nearby should look at Burlingame, San Mateo, or Millbrae.

What is the minimum lot size in Hillsborough?

Half an acre. The town also enforces a minimum dwelling size of 2,500 square feet. Together these rules prevent both subdivision of existing lots and construction of smaller homes, which is the main reason the town’s housing supply has stayed essentially fixed.

Which high school do Hillsborough students attend?

Hillsborough has no public high school. Students attend the San Mateo Union High School District, most commonly Burlingame High School or San Mateo High School depending on the neighborhood. Confirm current assignment directly with the district for any specific address.

Which Hillsborough neighborhood is the most expensive?

Ryan Tract has consistently posted the highest median in recent reported data, above $11 million in 2025, and among the highest price-per-square-foot figures in town. It is also the neighborhood closest to Burlingame Avenue and the Caltrain station. Hillsborough Heights has posted high medians as well on very low sale counts.

Is Hillsborough walkable?

Not in the usual sense. There is no retail in town and most streets have no sidewalks. The flat lower-elevation neighborhoods, particularly Country Club Manor, Hillsborough Heights, and Ryan Tract, are the most practical for walking and biking, and Hillsborough Heights and Ryan Tract are within reach of downtown San Mateo and Burlingame Avenue respectively.

How does Hillsborough compare to Atherton and Woodside?

All three are Peninsula towns built around large-lot single-family zoning and are routinely named together as the region’s most exclusive. Hillsborough is distinguished by its total absence of commercial zoning, its topographic range from flat lower blocks to steep wooded hillsides, and its own K-8 district. Atherton is flatter and further south; Woodside is more rural and more equestrian in character.

How much inventory is typically available in Hillsborough?

Very little. Several neighborhoods record fewer than ten sales in a full calendar year, and some record only one or two. Buyers who need to move on a fixed timeline should assume they will be waiting for the right property rather than choosing among several, and should be positioned to act when one surfaces.

Do Hillsborough properties face wildfire insurance issues?

It depends entirely on the parcel. The town’s western and upper areas are wooded and hilly, and California hazard designations and insurer appetite vary property by property. Do not assume coverage is routine. Obtain a written quote and confirm the parcel’s hazard designation during your inspection contingency period.

How does The Knight Group work in the Hillsborough market?

We treat Hillsborough as fourteen separate submarkets, not one market. The pricing analysis we bring to a Skyfarm hillside estate is not the analysis that applies to a flat Hillsborough Heights lot two miles away, and in a market this thin, using the wrong comp set is the most expensive mistake available.

For buyers, our work starts before there is anything to show you. Given how few properties trade here annually, we track owner intent and pre-market activity by neighborhood. We also front-load the diligence that catches people out in this town: design review exposure on remodel plans, hillside grading and foundation scope, insurance availability, and school assignment by exact address.

For sellers, we build the comparable-sales argument first and the marketing plan second, because in a neighborhood with three sales a year the pricing narrative is what a buyer’s agent will argue against. Then we go find the buyer rather than waiting for the buyer to find the listing.

If you are weighing Hillsborough against Atherton, Burlingame, or San Mateo Park, or deciding between upper and lower Hillsborough, that is a conversation worth having before you start touring. Browse the neighborhood pages above, or contact The Knight Group to talk through where your criteria actually land.