Neighborhoods

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November 12, 2026

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Understanding Utilities in Cupertino, CA: Providers and Costs

Before you offer on a Cupertino, CA home, know your water company, sewer billing, and PG&E setup. Get the seller's 12 months of bills to budget accurately.

The median sale price for a single-family home in Cupertino, CA sits around $3,018,000. At that price point, monthly utility bills won't determine whether you qualify for a loan. What they will do is affect your carrying costs every single month you own the place, and the specific property you choose dictates who provides your water, how your sewer is billed, and whether you inherit a solar lease.

Two next-door neighbors in this city can have completely different water companies and rate schedules. Sorting out those property-specific details during the pre-offer window gives you a clear, accurate picture of what this house costs to run.

Key takeaway

Most Cupertino homes get power and gas from PG&E, with Silicon Valley Clean Energy acting as the default electricity supplier. Garbage service comes from the city's franchised hauler, and sewer service goes through the Cupertino Sanitary District. Water comes from one of two companies depending on the street, which dictates your specific rate schedule. Single-family homes recently went under contract in a median of 12 days, so you should confirm the providers and get 12 months of seller bills before you write an offer.

Who this guide is for

You're weighing an offer on a Cupertino home, or planning a move into one, and need to know who will bill you for each utility and roughly what it will cost each month before you commit.

Why utility checks matter before you write an offer

Cupertino single-family home prices fell roughly 11.1% year over year, yet houses still recently sold at about 106.3% of their list price in a median of 12 days. The price drop doesn't buy you extra time. The utility questions that change your monthly bill have to be answered before you write the offer, not during escrow.

Those questions include which of the two water companies serves the street, how sewer is billed through the property tax bill, whether any solar is owned or leased, and whether a hillside lot is on a private well or septic system. With most houses selling above list price, you'll have little room to ask for credits later if you discover high utility costs after you're already in contract. The time to price in a pool's water use or a solar lease payment is before you set your offer number.

Reviewing the seller's past bills and verifying the providers for the address ensures your budget reflects the home's actual operating costs. Check our Cupertino housing market page to see how current inventory levels might affect your offer timeline.

Utility providers tied to your specific street

A 95014 mailing address or a Cupertino, CA city name doesn't automatically settle which utility companies serve a home. The property's exact location on the service map determines your provider and your rate schedule.

Two identical-looking homes across the street from each other can have completely different monthly baseline costs. This split primarily affects water and sewer, which means you have to verify the providers for every house you tour.

Water providers and rates

The City of Cupertino is served by three separate water systems. California Water Service (Cal Water) serves the northeastern portion of the city, while San Jose Water Company serves the southeastern portion and operates the city's own municipal system in the western portion. The address dictates the provider, and you can't choose your water company.

Each company sets its own rates through state regulatory rate cases. Under San Jose Water Company's schedule, the current monthly service charge for a standard 3/4-inch residential meter is about $78.64, with usage billed in tiers starting at roughly $4.79 per CCF for the first 6 CCF. Cal Water's Los Altos Suburban District, which covers part of Cupertino, recently had a service charge of roughly $61.05 per month for a 3/4-inch meter, with Tier 1 usage priced around $1.88 per CCF.

Outdoor irrigation is the largest variable in a residential water bill under these tiered rates, so you can spot potential high costs during a home tour. The catch is that because rates are set through state regulatory rate cases, the schedule you budget for today can change after you close.

Sewer charges and hillside septic systems

Sewer service for most of the city comes from the Cupertino Sanitary District. Unlike your water service, you won't receive a monthly sewer bill in the mail. The annual sewer service charge is collected as a line item on the Santa Clara County property tax bill.

Some parcels at the city's edges or in the hills use private septic systems and wells instead of public sewer. The Santa Clara County Department of Environmental Health regulates these systems, requiring permits for any construction or repair, and recommends pumping septic tanks every three to five years.

Because the sewer charge sits on the tax bill, it's easy to leave out of a monthly budget entirely. On a hillside lot with septic, there's no public maintenance to fall back on, meaning inspection and pumping costs are entirely yours.

Citywide utility billing and services

For power and garbage, the specific property address doesn't change the provider. Every home in the city uses the same infrastructure for these core services, so there's no service-map research required here.

Your job as a buyer is simply to understand how these bills are structured and what plan choices you'll have after moving in.

Electricity and natural gas service

PG&E owns the power wires and gas lines throughout the city and sends your monthly bill. New Cupertino electricity accounts are enrolled in Silicon Valley Clean Energy by default. SVCE acts as the generation supplier, and its charges appear directly on your PG&E bill.

SVCE automatically enrolls customers as the default provider under state law, and its GreenStart product is priced below PG&E's comparable generation rate. Your baseline allowances depend on your climate territory and your home's heating source, so an older all-electric home and a home with gas heat will show very different billing patterns. The seller's 12 months of past bills will tell you far more about the home's energy use than any citywide estimate.

Switching generation suppliers only affects the generation portion of the bill. PG&E's delivery charges apply regardless of what you choose.

Garbage and recycling collection

Garbage, recycling, and organics collection is handled by Recology South Bay, the city's franchised hauler. The size of the garbage cart on the account determines your monthly rate. For a single-family home, a 20- or 24-gallon cart costs roughly $43.48 per month, while a 32- or 35-gallon cart costs about $46.24 per month, with recycling and organics included at no extra cost.

Ask the seller which cart size is on the account and whether any extra carts are billed. The seller's cart size may not suit your household, and upsizing will raise your rate.

In a condo or townhouse community, garbage and sometimes water are often paid through HOA dues. Confirm that with the association directly.

Utility choices you make after closing

Some utility costs depend entirely on the contracts you sign or inherit. Internet provider availability varies street by street, so check the FCC National Broadband Map for the exact address before making an offer.

If the home has solar panels, you need to know whether the system is owned or leased. A lease or power-purchase agreement transfers as a monthly obligation and requires the provider's approval to take over. Owned systems may carry a legacy net-metering status that affects your bill credits under current state rules. Ask the seller for the solar contract, the interconnection date, and the net-metering status so you know exactly what you're inheriting.

How to budget for monthly utility costs

The most accurate way to estimate your future costs is to start with the seller's last 12 months of water, PG&E, and garbage bills. Add the annual sewer charge from the property tax bill and divide it by 12. That gives you a complete monthly baseline.

From there, adjust for the differences between how the seller lives and how you will. A larger irrigated yard, a pool, an electric vehicle charger, or a planned switch from gas to electric appliances will change your usage. Moving into a higher water usage tier during the summer, for example, can noticeably increase your bill under San Jose Water's rate schedule.

Andy Tse can request the seller's utility history during the disclosure review process. Review our buying costs guide to see how these monthly expenses fit alongside your closing costs, and check our pros and cons page for a broader look at the overall cost of living.

Utility questions to ask before making an offer

Single-family homes recently sold in just under two weeks. You need fast answers to a few specific questions, and gathering them early prevents surprises after your offer is accepted. Andy Tse's group can help line up these documents before an offer deadline.

First, find out which water company serves the exact address, as this sets your rate schedule and conservation rules. Look up the address on the city's water service map or call the provider directly. Second, check if the home is on public sewer or a private septic system, particularly for hillside lots. You can verify the public sewer charge on the current Santa Clara County property tax bill, or check county records for well and septic permits.

Third, ask if the home has solar and whether it's owned or leased. That dictates your PG&E bill structure and any contract you must assume at closing. Finally, evaluate the size of the irrigated yard and whether there's a pool or spa, since outdoor use drives summer water bills.

If you're selling a home, having these bills and contracts ready will speed up your sale and limit buyer questions.

At a glance

Single-family median sale price: $3,018,797, down 11.1% year over year (90 days ending 2026-09-30, 58 sales)
All homes median sale price: $2,848,643, down 6.9% year over year (90 days ending 2026-09-30, 76 sales)
Single-family median days on market: 12; all homes: 13 (90 days ending 2026-09-30)
Single-family sale-to-list ratio: 106.3%; all homes: 105.4% (90 days ending 2026-09-30)
Share sold above list: 54.4% of single-family homes; 54.7% of all homes (90 days ending 2026-09-30)
Months of supply: 1.8 for single-family; 2.5 for all homes (90 days ending 2026-09-30)
Homes for sale (inventory): 33 single-family; 62 all homes (90 days ending 2026-09-30)
Median price per square foot: $1,630 single-family; $1,597 all homes (90 days ending 2026-09-30)
Condo and townhouse figures are not reported for this window because fewer than 10 sold.

Cupertino utilities FAQs

Are utilities expensive in Cupertino?

Under San Jose Water Company's Schedule No. 1 General Metered Service, the current monthly service charge for a 3/4-inch meter is $78.64, with usage tiers ranging from roughly $4.79 to $13.66 per CCF. Household bills vary mostly with outdoor irrigation, home size, and your heating type. Ask the seller for 12 months of past bills to gauge the exact costs, and review our pros and cons page for broader living expenses.

Is a 'Cupertino, CA' charge on my bank statement a utility bill?

No, a charge on your financial statement from apple.com/bill with a Cupertino descriptor is typically for Apple purchases or subscriptions, since Apple is headquartered there. Real Cupertino utility bills come directly from named providers like PG&E or San Jose Water. You can check your Apple Family Sharing settings to see what you were charged for and cancel any unwanted subscriptions.

Is Cupertino tap water safe to drink?

Yes, the local water providers meet state and federal standards. San Jose Water's 2025 Annual Water Quality Report for the City of Cupertino shows hardness levels ranging roughly from 99 to 288 ppm based on over 5,960 samples tested. Read the annual consumer confidence report for the specific company that serves your address to see the full testing results.

Do any Cupertino homes have well water?

Most homes connect to public water systems, but some hillside or edge parcels may use private wells. The Santa Clara County Department of Environmental Health requires permits for these systems and mandates specific setbacks from septic tanks and sewer mains. Ask the seller and check county records for well permits and recent water test results.

Can I opt out of Silicon Valley Clean Energy in Cupertino?

Yes, you can opt out of Silicon Valley Clean Energy and return to PG&E for your electric generation. Doing so means your generation charges shift to PG&E's comparable rate, which is higher than SVCE's GreenStart product. Check with SVCE for any specific opt-out terms or timelines.

Are there watering restrictions in Cupertino?

Yes, under Valley Water's enforceable water-waste ordinance, residential outdoor watering of decorative turf is limited to no more than two days per week. Mid-day watering is prohibited, and watering is banned within 48 hours of measurable rainfall. Confirm the exact rules with the water company that serves your address, since restrictions change with drought conditions.

How much does it cost to start utility service when moving to Cupertino?

You'll need to check directly with San Jose Water, Cal Water, and PG&E for their current new residential service start fees and deposit requirements. Garbage service usually transfers with the account, but confirm that with the hauler.

Do HOA dues in Cupertino condos cover utilities?

It depends on the specific association. Coverage often includes garbage, sometimes water and sewer, but rarely electricity. Ask the HOA for the current budget and a breakdown of what the dues cover, and review our types of homes page for more details.

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