Direct Answer
Pin down three dated papers first: the vacancy clause on your policy runs 30 to 60 days, the $7,000 homeowners' exemption has to be filed by February 15, and a supplemental notice gives you 60 days from mailing to appeal.
Who This Is For
- $5M+ buyers still touring or already in contract who want to know what happens after closing before it happens
- Buyers of a $5M+ single-family home on the Peninsula or in the South Bay who have just closed, or will close within 30 days
- Families who will not move in right away — a renovation first, or the owners still overseas
- Families who took title in their own names and plan to move the house into their own revocable living trust
- Cross-border buyers purchasing in the United States for the first time, and owners of large parcels in Los Altos Hills, Woodside and Portola Valley
Three Ways to Rank the List
The list of things to handle after closing is largely the same for a $5M+ house as for any other house: rekey, utilities, change of address, insurance, property tax. What a luxury closing adds is not line items but magnitude, and the difference concentrates in three places. Amount: a supplemental bill charges the difference between the old and new tax base, prorated over the remaining months of the fiscal year — at a purchase price like $18 million, that proration still lands as a six-figure bill, and it is not split in escrow, not paid from an impound account, and not copied to the lender. Coverage: $5M+ buyers frequently do not move in on closing day because a renovation comes first or the family is still abroad, and the vacancy clause in a standard homeowners policy starts counting from the first day the house sits empty. Operations: a home built to an owner's own standard carries systems and vendors by the dozen, and a cross-border buyer may be out of the country for months while county bills and town notices arrive at an empty house, which is the same as not arriving at all.
One: Does This Item Have a Date?
The first ruler is the calendar. Anything with a statutory or contractual date goes to the front: the policy effective date and the day the vacancy count begins, the supplemental bill due date, the homeowners' exemption filing deadline, the DMV's 10 days, and every appeal window. Those dates do not wait while you manage a remodel or work off jet lag.
Items with no date go behind them, which is not the same as permission to defer. Rekeying, resetting access control and accounts, taking over the seller's vendor roster — none of it has a deadline, and all of it is the one category nobody else will do for you. Put the dated items on a calendar with two reminders each, and compress everything undated into week one.
Two: Is Lateness Measured in Dollars, or Is It Irreversible?
The second ruler decides what to drop when time runs short. Being late on the regular property tax costs money: a 10% penalty after December 10 on the first installment and after April 10 on the second. Money can be paid.
The other category cannot be recovered. A loss that occurs while the vacancy clause is in force is not undone by paying the premium afterward, and once the 60-day supplemental appeal window closes, the county does not reopen it because you were overseas. The working test is to ask of each line: what is the worst outcome if this happens three months late? If the answer is an extra payment, it can wait. If the answer is that the option is simply gone, it goes first. Hillside properties stack a wildfire underwriting problem on top of the vacancy problem — see You Bought a Multi-Million-Dollar Estate in Woodside or Portola Valley—Why Can't You Get (or Afford) Home Insurance?
Three: Are You Actually Here?
If you are on the ground, every item above can be cleared yourself inside two weeks. If you are not, each one has to resolve to a specific person and a mailing address: who lets the insurance inspector in, who signs for the county's certified mail, who converts the bills to paperless.
What you want on paper is a two-column table — every line of the 12 weeks on the left, the name of the person responsible on the right. The blank rows on the right are the ones not yet arranged. How far a remote purchase itself can go is covered in I'm in China and Can't Fly Over to Tour, Sign, or Notarize — Can I Still Buy a $5M+ Bay Area Home Entirely Remotely?, and holding through an entity or a trust adds a separate reporting layer, covered in I'm Buying a Bay Area Home All-Cash Through an LLC or a Trust — Do I Have to Report My Beneficial Owners to FinCEN as of March 2026?
The 12-Week Timeline
The numbers first. Only a handful of items in the first 12 weeks actually carry a date. The vacancy clause in a standard homeowners policy runs 30 to 60 days across the industry, and the California Department of Insurance residential insurance guide lists a loss occurring while a home has been vacant more than 60 days as ordinarily not covered. The DMV requires the driver's license and vehicle registration address to be updated within 10 days (Vehicle Code §14600 and §4159). The homeowners' exemption filed by February 15 of the following year carries the full $7,000 reduction in assessed value, worth roughly $70 to $80 a year, and filed between February 16 and December 10 it is reduced under R&T §275(a) to the lesser of $5,600 or 80%. The regular property tax turns delinquent after December 10 on the first installment and after April 10 on the second, with a 10% penalty on each.
| When | What to do | Cost of lateness, and what is heavier at $5M+ |
|---|---|---|
| Closing day | Read the policy declarations page, the coverage limits and the deductible, and ask specifically how many days the vacancy provision allows: the industry range runs 30 to 60 days, and the California Department of Insurance residential insurance guide lists a loss occurring while the home has been vacant more than 60 days as ordinarily not covered by a standard homeowners policy. Under Insurance Code §10081 the insurer must offer you earthquake coverage, and under §10083 no response within 30 days of the offer being mailed counts as a rejection. | For a family not moving in right away — renovating first, or still overseas — the vacancy clause is the first exposure, and paying premium after the fact does not buy back a loss that already happened. Hillside properties add a wildfire underwriting problem on top of it. |
| Week 1 | Reset every lock, access code, garage remote, safe and smart-home account. Take delivery of the manuals and the vendor roster the seller leaves behind. Decide vendor by vendor whether the seller's team stays or is replaced. | This line has no statutory date and is the clearest case of work nobody else will do for you. On a house with systems and vendors by the dozen, letting the handover slip past week one means re-sourcing a contact every time a question comes up. |
| Week 1 | Transfer the utilities. Palo Alto runs a single municipal account covering five services — electric, gas, water, sewer and fiber — requiring at least one business day's notice, startable only on a business day, with the deposit billed on the first statement and only one legal name on the account. Atherton, Woodside and Portola Valley take water from Cal Water's Bear Gulch district; Menlo Park has four water providers and the right one depends on the address; roughly two-thirds of Los Altos Hills sits in the Purissima Hills Water District and the rest is Cal Water; Saratoga is San Jose Water. | There is no Bay Area-wide procedure at this step — inside a single county the water provider can change from one road to the next. Large parcels are often on septic: everything in Woodside outside its three sewer service areas is septic, Portola Valley is likewise mostly septic, and both towns' septic systems are regulated by San Mateo County environmental health, while Los Altos Hills allows septic only where no sewer lies within 200 feet, under Santa Clara County environmental health. Know who maintains it before you need to. |
| Weeks 1–2 | File the USPS change of address, and update the driver's license (Vehicle Code §14600) and vehicle registration (§4159) addresses at the DMV within 10 days — free online, and a DMV address change also updates voter registration. | The step that matters more for a cross-border buyer is redirecting the county Assessor, the insurer and the lender to one reliable recipient: the agent, the property manager or the CPA. |
| Weeks 1–2 | Confirm the first payment date. If a mortgage servicing transfer notice arrives, check it against 12 CFR §1024.33: the transferring servicer must mail notice at least 15 days before the effective date, the new servicer must mail notice within 15 days after it, and a payment sent to the old servicer within 60 days after the transfer takes effect is not late. Call back on a number you already have before changing how you pay. | Jumbo loans change servicers routinely, and letters impersonating a servicing transfer are just as routine. That 60-day grace period exists precisely to give you time to verify. |
| Weeks 2–4 | File the Homeowners' Exemption claim (BOE-266). Both county Assessors mail the form automatically to the newly recorded owner after each residential transaction, and both accept online filing. Filed by February 15 of the following year it carries the full $7,000 reduction in assessed value, worth roughly $70 to $80 a year; filed between February 16 and December 10 it is reduced under R&T §275(a) to the lesser of $5,600 or 80%. Occupy the home within 90 days of closing and file before the next January 1, and the exemption can also apply to the supplemental assessment. | The dollars are invisible against the carrying cost of a $10M+ house, but the form is the signal that the county has you on record as the owner. Note the Santa Clara County rule: any recorded deed, including a transfer into or out of a trust, terminates the exemption automatically, a fresh form goes to the newly recorded owner, and you have to file again. |
| Weeks 4–8 | Wait for the recorded grant deed to come back from the county Recorder — roughly 6 to 8 weeks in Santa Clara County, roughly 4 to 6 weeks in San Mateo County — and for the title company to mail the owner's title policy. Letters offering "a copy of your deed for $89" will arrive during this window; every one of them is marketing, not a county notice. The county's own certified copies cost $10 for the first page and $3 for each page after. | These letters cluster once a high-value sale enters the public record. File the deed and the title policy the moment they arrive, and note down how to look yourself up in the county Recorder's index while you are at it. |
| Weeks 4–12 | Families who took title in their own names work with an estate attorney to move the property into their own revocable living trust. The transfer itself is automatically excluded from reassessment under R&T §62(d), with no separate exclusion claim to file. The PCOR (BOE-502-A) must be filed with the deed at the Recorder, with box L.1 checked in Part 1. The loan is not exposed to due-on-sale, under Garn-St Germain (12 U.S.C. §1701j-3(d)(8)). | This is the most common post-closing correction high-net-worth families make. Two things get missed: file the deed without the PCOR and the Recorder charges a $20 additional recording fee (stated on the BOE-502-A form itself) while the county Assessor mails a separate Change in Ownership Statement (BOE-502-AH), with penalties under R&T §482 if that goes unfiled as well; and the $7,000 homeowners' exemption ends when the new deed records and has to be claimed again. |
| Weeks 8–12 | Pin down the regular property tax calendar: bills are mailed by November 1, the first installment is due November 1 and delinquent after December 10, the second is due February 1 and delinquent after April 10, each carrying a 10% penalty, with a fixed cost added to a delinquent second installment — $20 in Santa Clara County, $40 in San Mateo County. Both counties offer e-billing, and Santa Clara's tax office can also send due-date reminders to several email addresses at once. | The first year's bill may still carry the prior owner's name, and it will not be re-mailed for that reason. Not receiving a bill does not excuse a delinquency — the Orange County treasurer-tax collector states the same California code this way: failure to receive a tax bill shall not relieve the lien of taxes. Cross-border buyers especially: a bill mailed to an empty house is a bill that goes unpaid. |
| Weeks 8–12 | On a large parcel, read the town's tree ordinance before touching a tree. Atherton Municipal Code Ch. 8.10 protects oaks of 48 inches circumference and larger, and other species of 48 inches circumference and larger outside the main building area, both measured 54 inches above the ground, with excessive pruning requiring prior approval from the Town Arborist. Palo Alto Municipal Code Ch. 8.10 protects native oaks, maples and cedars at 11.5 inches DBH and above, redwoods at 18 inches and above, and other mature trees at 15 inches and above, with 7 days' advance online notice required before maintenance work. | Hillside properties carry a separate set of annual defensible space obligations that belong on a yearly calendar. Atherton owners can request a House Check from the town police department while away for an extended period. |
| Weeks 8–12 | Renovation permitting, furnishing schedules and landscape work are three long project lines that belong on their own separate sheet, not mixed into the list above. | Paperwork is paced by statutory dates; construction is paced by permit cycles and lead times. Interleaving them is how the items with real deadlines get squeezed out. |
What to remember: the rows most often read backwards are the ones with no date at all. Rekeying, resetting accounts and taking over the vendor roster have no deadline, and they are the batch nobody else will do for you. The second is the dollar figure in the weeks 2–4 row: a $7,000 exemption saves roughly $70 to $80 a year, invisible against the carrying cost of a $10M+ house, but it confirms the county has recorded you as the owner — and the moment the house moves into a trust and a new deed records, the Santa Clara County rule terminates the exemption automatically and it has to be filed again. How to sequence the three long project lines is covered in I Just Closed on a $10M+ Silicon Valley Home — What Do I Still Need to Line Up After Closing?
Three Things to Watch After Week 12
The first is the Notice of Supplemental Assessment, the only item on the whole list that gets more expensive the later it is handled. It is not prorated in escrow, it is not paid by the lender out of an impound account, and the lender does not receive a copy. San Mateo County mails most supplemental bills within 9 months of closing, with the notice going out roughly 60 days ahead of the bill; Santa Clara County likewise mails the notice about 60 days before the bill. The appeal window in both counties is 60 days from the date the notice is mailed. A closing dated between January and May produces two supplemental bills, which is the situation behind the question about why a California purchase generates two property tax bills. Due dates follow the month the bill is mailed (R&T §75.52), and the date printed on the bill governs. Why the bill arrives at all and how the figure is calculated is covered in You Bought a $10M+ Bay Area Home—Why Does a Second Property-Tax Bill Arrive Months After Closing?
The second is the annual assessment notice that arrives in early July of the following year, and the appeal period that follows it: July 2 to September 15 in Santa Clara County, July 2 to November 30 in San Mateo County — two and a half months apart. Families who have bought a house in each county are the ones most likely to be caught by it.
The third is renewal. A California insurer must offer earthquake coverage under Insurance Code §10081 when it writes the policy, and must offer it again at renewal at least every other year (not necessarily at the first renewal); §10083 provides that no response within 30 days of the offer being mailed counts as a rejection. Owners who are abroad, with mail handled by someone else, are the ones most likely to let it lapse by silence.
Santa Clara vs. San Mateo
The numbers first. The Peninsula and the South Bay straddle two counties — Atherton, Menlo Park, Woodside and Portola Valley sit in San Mateo County, while Palo Alto, Los Altos Hills and Saratoga sit in Santa Clara County — and the two calendars differ in three hard places. First, the annual assessment appeal period runs July 2 to September 15 in Santa Clara County and July 2 to November 30 in San Mateo County. Second, a recorded deed comes back in roughly 4 to 6 weeks in San Mateo County and roughly 6 to 8 weeks in Santa Clara County. Third, on a delinquent second regular installment the 10% penalty is identical, but the fixed cost is $20 in Santa Clara County and $40 in San Mateo County. The supplemental appeal window is the one that is shared: 60 days from the mailing date of the notice, in both counties.
| Item | Santa Clara (Palo Alto / Los Altos Hills / Saratoga) | San Mateo (Atherton / Menlo Park / Woodside / Portola Valley) |
|---|---|---|
| Homeowners' exemption claim (BOE-266) | Mailed automatically to the newly recorded owner after each residential transaction; full $7,000 if filed by February 15, 80% if filed February 16 through December 10; online filing accepted | New owners receive the claim form automatically; the same California statutory deadlines apply; filing accepted online through DocuSign |
| When the supplemental notice is mailed | Notice mailed roughly 60 days before the bill | Most bills mailed within 9 months of closing, with the notice roughly 60 days ahead of the bill |
| Supplemental appeal window | 60 days from the date the notice is mailed | 60 days from the date the notice is mailed |
| Annual assessment appeal period | July 2 to September 15 | July 2 to November 30 |
| Recorded deed returned | Roughly 6 to 8 weeks | Roughly 4 to 6 weeks |
| Regular property tax delinquency | 10% penalty after December 10 and after April 10, plus a $20 cost on the second installment | 10% penalty after December 10 and after April 10, plus a $40 cost on the second installment |
| Paperless billing and due-date reminders | Department of Tax and Collections e-billing with due-date reminders to several email addresses | Tax Collector E-Bill enrollment |
| Bill lookup and duplicate requests | (408) 808-7900 | (866) 220-0308 for a duplicate bill |
What to remember: the row that actually causes damage is the annual appeal period. Mark an Atherton house against Santa Clara's September 15 and you throw away two and a half months; apply San Mateo's November 30 to a Palo Alto house and you find out after the window has closed. The deed return times are worth keeping side by side as well — nothing missing at week five is normal, nothing arrived by week ten is a phone call. And the supplemental 60 days runs from the date the notice was mailed, not from the day you opened it and understood it.
What MK Group Sees in Practice
MK Group has been walking clients through each of these items deal by deal; this is the first time they are pulled together into a single list. Until now they lived in the emails, the phone calls and the site visits of individual transactions. Marie Wang (DRE# 02110980) put the principle plainly on YouTube @MarieWang (44K+): truly professional luxury service does not stop at closing. A Google five-star review on the page of Kevin Mo (DRE# 02127623, YouTube @KevinMoRE (23K+)) describes the other half of the same idea — he "is still offering his help after closing the deal."
In May 2026, MK Group represented the buyer on an $18 million off-market purchase in Atherton. The buyer came from mainland China and had never bought a home in the United States. On that transaction MK Group functioned as a full private concierge and consultant, planning each subsequent step out in advance, advising at an expert level on how title should be held — individual name, entity or trust — and on succession, and connecting the family to the corresponding professionals. The property had been built by an architect over four years to his own standard: a complete whole-house equipment room in the basement, lighting, security, irrigation and access control all linked through a single smart system, and two full boxes of appliance and system manuals kept intact by the original owner. The week-one systems and vendor handover line on the checklist is written for exactly that kind of asset — the handover sheet needs to record, item by item, which vendor installed which system, how much warranty remains, whether the original team stays on, and which accounts have to be reset outright.
Also in May 2026, MK Group closed a roughly $11 million all-cash purchase in Los Altos Hills, held through a corporate entity and locked up in two weeks. Three post-closing actions are on the record for that transaction: helping change out light fixtures, tracking furniture shipped by ocean freight from overseas, and styling the new home. None carries a statutory date, and all three land squarely in the third ruler above — whether you are actually here. A $12 million Saratoga purchase, handled as full buy-side representation, sat further out still: the client never appeared in person, bought through a family office, and made a first real visit to the Bay Area only after the purchase was complete. On a transaction like that, many of the items on this list have to be finished by someone else before the client ever arrives.
Common Misconceptions
"The policy has been in force since the day we closed, so renovating for six months before moving in is fine, right?"
Most lists of the first things you should do after closing on a house lead with the keys and the utilities, and skip the one line that is already running a clock. Nearly every standard homeowners policy contains a vacancy provision: the Insurance Information Institute puts the industry range at coverage beginning to shrink once a home has been unoccupied for 30 to 60 days, and the California Department of Insurance residential insurance guide is blunter still, listing a loss occurring while the home has been vacant more than 60 days as ordinarily not covered. A renovation period and an owner still living abroad are the two most common ways to trigger it, and both are ordinary conditions for a $5M+ buyer. The move is to ask for the day count on closing day and, against your actual occupancy plan, add a vacancy endorsement or buy a separate vacant-home policy. Premium can be paid later. A loss that has already occurred cannot.
"My property tax is already in an impound account — won't the bank pay the supplemental bill? And why did I get two property tax bills?"
It will not. Page 3 of the California State Board of Equalization's BOE-502-A form reads: supplemental assessments are not paid by the title or escrow company at close of escrow, and are not included in lender impound accounts. The Santa Clara County Assessor states the same thing, and the county tax office adds a sharper line: your lender does not receive a copy of the supplemental bill. Put together, the three sentences mean this money is known only to you and paid only by you — and a delinquency caused by assuming the bank handled it is not forgiven by a dollar. As for the two bills: a closing dated between January and May produces a supplemental assessment that spans two fiscal years, generating two supplemental bills, and those are separate from the regular bill.
"Why didn't anyone give me a title deed or property certificate after closing? And is this letter offering a copy of my deed for $89 the county asking me to pay?"
There is no property certificate in the United States. Ownership is evidenced by the recorded grant deed plus the owner's title policy issued by the title company. The county Recorder returns the recorded deed free of charge to the addressee named in the upper left corner of the document — roughly 6 to 8 weeks in Santa Clara County and roughly 4 to 6 weeks in San Mateo County — and the title company mails the policy. As for the "$89 for a copy of your deed" letter: Santa Clara County issued a consumer alert on July 3, 2018 about exactly that mailing. Those letters are marketing. Assessment information is free to look up, the county's own certified copies cost $10 for the first page and $3 for each page after, and official county correspondence carries the county seal and does not solicit fees like these. Throw it away, then verify your own record in the county Recorder's grantor/grantee index.
"Won't moving the house into my own living trust trigger a property tax reassessment, or let the bank call the loan?"
Neither, but two pieces of paper cannot be skipped. The transfer itself is automatically excluded from the definition of a change in ownership under R&T §62(d), triggers no reassessment and requires no separate exclusion claim — the San Mateo County Assessor lists a transfer into a trust in which the transferor is the present beneficiary among its automatic exclusions. Garn-St Germain (12 U.S.C. §1701j-3(d)(8)) separately bars a lender from exercising due-on-sale because a borrower moved a residence into an inter vivos trust in which the borrower is a beneficiary. What gets missed: the PCOR (BOE-502-A) must be filed with the deed at the Recorder with box L.1 checked in Part 1, and where the deed is filed without it the Recorder charges a $20 additional recording fee, the county Assessor mails a separate Change in Ownership Statement (BOE-502-AH), and continued failure to file draws penalties under R&T §482; and the existing $7,000 homeowners' exemption terminates when the new deed records, so it has to be claimed again. Whether to hold in your own name, a trust or an LLC is covered in Should a Bay Area Home Be Held in Your Own Name, a Living Trust, or an LLC?
"I filed a homestead — doesn't that mean I applied for the property tax exemption?"
These are two entirely different pieces of paper, and conflating them is common. California's homestead is creditor protection: Code of Civil Procedure §704.730 sets an exemption for equity in a principal residence with a statutory range of $300,000 to $600,000, adjusted annually for CPI. It shields part of your equity when a creditor comes after you, and has nothing to do with property tax. The property tax relief is called the Homeowners' Exemption, claimed on form BOE-266, and it removes $7,000 from assessed value — roughly $70 to $80 a year — and must be filed by February 15 of the following year to be claimed in full. The third item often pulled into the same conversation is the federal income tax exclusion on gain when you sell, which is determined at sale by how long the home was your principal residence, and is unrelated to this form as well.
"I'm not in the U.S. — can't the bills sit at the house until I'm back?"
The first year's regular property tax bill may still carry the prior owner's name, and it will not be re-mailed for that reason. Not receiving a bill does not excuse a delinquency, and each installment carries a 10% penalty. The supplemental is more expensive still: the appeal window is 60 days from the date the notice is mailed, and San Mateo County mails most supplemental bills within 9 months of closing, so if you come back three months later and open the mail then, the window may already have closed. The move is to enroll in e-billing in both counties and redirect all four mailing addresses — Assessor, Tax Collector, insurer and lender — to one person who opens mail every week.
Next Steps
- Open a 12-week calendar on closing day and pin the three dated papers first: the policy declarations page and the number of days its vacancy provision allows, February 15 for the homeowners' exemption claim, and the 60-day appeal window on the supplemental notice still to come. Set two reminders on each, with the second a week before the deadline.
- Complete the systems and vendor handover sheet in week one: which vendor installed which system, how much warranty remains, whether the original service team stays or is replaced, and which accounts have to be reset outright.
- Families outside the United States should build the 12-week list as a two-column table — the item on the left, the name and mailing address of the responsible person on the right — and enroll in e-billing in both counties at the same time.
- After week 12, watch three things: the supplemental notice and its 60-day appeal window from the mailing date, the annual assessment appeal period beginning in early July of the following year (the two counties close on different dates), and the first year's regular bill, which may still carry the prior owner's name.
- Move the recurring obligations onto an annual calendar. The yearly fire work required on a hillside property is covered in You Bought a Hillside Home in Woodside, Portola Valley, or Los Altos Hills — What Does Fire Compliance Require of You Every Year?, and the fixed costs that sit outside the mortgage and the property tax are covered in Beyond the Mortgage, What Does This House Cost Every Year? Keep renovation permitting, furnishing and landscape work on their own separate sheet rather than interleaved with the paperwork.