Board-Up and Security for a Damaged Vacant House

A damaged house that nobody lives in should be closed up as soon as it is safe to do so: every broken window, door, wall and roof opening covered, the locks changed, the water shut off at the main, and the work photographed and receipted. California's standard fire policy requires the owner to protect the property from further damage after a loss, and an empty house with open walls invites weather, theft and trespass. Then someone has to keep checking it until it sells, because board-up is a monthly cost of holding the house, not a one-time job.

This article is part of the fire, water and repair-heavy houses section. The first days after a leak in an empty house are covered in water damage in a vacant house: what to do first; this one is about keeping a damaged, empty house closed and watched until you decide what to do with it.

Why securing the house is not optional

Three sets of rules point the same way.

The policy. California's standard form fire policy, in Insurance Code section 2071, says that after a loss the insured shall "protect the property from further damage," and that the insurer is not liable for loss caused by the owner's failure to use reasonable means to save and preserve the property at and after a loss. The Department of Insurance's claims guide puts it plainly: a policy "may not cover ensuing damage" if you have not taken reasonable steps to secure the property, and the insurer will reimburse reasonable costs to protect it as long as you "save receipts for any materials you buy."

Vacancy. The same standard policy says the insurer is not liable for loss occurring while a building is vacant or unoccupied beyond 60 consecutive days, unless the policy provides otherwise in writing, and the Department lists losses to a house vacant 60 days or more among perils a homeowners policy generally does not cover. Tell your insurer the house is empty; what changes is in insuring a vacant house: what changes.

The code. Health and Safety Code section 17920.3 lists conditions that make a building substandard, including "broken, rotted, split, or buckled exterior wall coverings or roof coverings," any nuisance, and premises with junk, debris or stagnant water that are fire, health or safety hazards. If an owner does not deal with those, a city can order it done, and when a city boards a house itself the cost can end up on the tax roll or title, as described in code liens and title.

The first pass, in order

1. Enter only when it is safe. If the fire department or a building official has posted the house, follow the notice. Leave damaged wiring, gas and sagging ceilings to the utility and licensed trades.
2. Photograph before anything is covered. Every opening, inside and out. Once plywood goes up, the adjuster and any buyer see the boards, not the damage behind them.
3. Cover the openings. The Department of Insurance names plastic sheeting or plywood for damaged roofs, walls, doors and windows. Tarp the roof where it is open. Ground-floor windows and doors that can be reached from the yard come first.
4. Change or rekey the locks on every door, including the garage and side gates, and keep a list of who holds a key.
5. Shut off what nobody is watching. The water at the main, at minimum. Ask the utilities what has to stay on for drying equipment, alarms or showing the house later; the trade-offs are in utility shut-offs and a sale.
6. Take out what matters. Papers, valuables and anything irreplaceable, before a break-in decides for you. A list of what to look for is in what to find before you leave the rest.
7. Clear what can burn or rot. Fire debris, wet carpet and piles of trash outside are the accumulations the code list names, and they draw both pests and attention.
8. Keep every receipt and invoice, and send copies to your adjuster.

The Department also warns that temporary repairs are part of the total loss settlement, and to "beware of building contractors that encourage you to spend a lot of money on temporary repairs." Board-up money spent now is money that is not there for the rebuild.

Who should do the work, and how to check them

Board-up and roof tarping are construction work. The Contractors State License Board tells owners to "hire only licensed contractors and ask to see the license," to check the license online, and to keep payments in line with the work completed. After a fire or storm that led to a declared emergency, the Board adds that "it is a felony to contract without a license in a declared disaster area." Get the scope in writing: which openings, what material, whether the roof is tarped, and what happens if the house is broken into again.

If there is a claim, ask your insurer before hiring anyone whether it wants to approve or arrange the board-up, so the invoice goes where the claim expects it.

Security beyond the plywood

Boards keep weather out and slow people down. They also tell anyone driving by that the house is empty. The rest of the job is showing that someone is paying attention:

• Regular visits, logged. A dated photo set inside and out each visit, by you, a property manager or someone you trust. The log helps with the insurer and shows a buyer what the house has been through.
• A neighbor with your number. The first report of a problem at an empty house usually comes from next door.
• Yard and mail. Overgrowth and piled-up mail mark the house as empty as clearly as plywood does.
• Metal and fixtures. Open walls make copper and appliances easy to take; see copper theft and break-ins at vacant houses.
• Anyone living there. If you find someone inside, do not try to remove them yourself; the legal path is in unauthorized occupants: legal process, not a cleaning job.

Some cities also register vacant houses or set upkeep standards for boarded ones. Ask code enforcement; the questions are in vacant house registration rules.

Rancho Cucamonga: what changes by neighborhood

In Rancho Cucamonga, parts of Alta Loma and Etiwanda are in mapped fire hazard severity zones. A burned or smoke-damaged foothill house that sits boarded through a dry season needs its debris hauled and its yard kept down, because the code's fire hazard category covers combustible waste and vegetation that, in the fire chief's opinion, could fuel a fire.

In the planned communities of Victoria, Terra Vista and the newer Etiwanda tracts, two other things keep running while the house sits. Many of those tracts are inside community facilities districts, so the special tax stays on the property tax bill. And an association may have its own rules about boarded windows and exterior appearance, so ask it before the plywood goes up and again if the house will stay boarded for months.

What holding a boarded house costs, and when it stops

Every figure is a dash; the structure is what matters.

Security lineWhat it coversPer monthMonths if you repair and listMonths to an as-is closing

Initial board-up and tarp

Openings, roof, materials

-

-

-

Re-securing

After a break-in or a storm

-

-

-

Visits and the log

Inspections, photos, mail, yard

-

-

-

Vacancy coverage

The endorsement or vacant-dwelling policy

-

-

-

Utilities kept on

Power for lights or alarms, water for drying

-

-

-

Special tax and dues

Where the tract has them

-

-

-

Total security and holding

-

-

-

On the repair-and-list path, those lines run through permits, the work and the listing. On an as-is sale, they stop at closing once title is clear. Repairing and listing still nets more when the damage is contained, the claim pays most of the work, the house stays secure without repeated break-ins, and the finished house will sell to financed buyers on those streets. When the house keeps getting broken into, the repairs are uncertain, or you cannot visit it, the months themselves become the cost. The full holding-cost worksheet is in selling a vacant house or one with code violations.

What this looks like in practice

These are the kinds of files that come in, described without names or figures.

• A smoke-damaged Alta Loma house boarded after the fire, broken into twice since, with the owner living out of state.
• A house with a roof tarp that has been through a season of storms, where the owner wants to know what the water under it has done.
• An inherited house left empty after a kitchen fire, where the heirs found the side door open and no record of who had keys.

Getting both numbers

Keep the boards up until closing; the walkthrough is arranged around them, and any room that cannot be opened is noted on the sheet. You get an as-is cash offer from independent buyers and investors, with each repair category on its own line, and an open-market read on the house repaired, which is a preliminary estimate, not an appraisal. When repairing and listing nets more, the written recommendation says so, and you are introduced to a designated local expert, an independently licensed California agent who works your neighborhood. The rebuild-or-sell comparison is in rebuild first or sell now. Start on the fire, water and repair-heavy houses page or call (909) 498-3977. There is no cost and no obligation to get the two numbers and the written report.

Sources

• California Insurance Code section 2071 (standard form fire policy: protecting property after a loss, vacancy), copy read on california.public.law, accessed November 6, 2026
• California Department of Insurance: Residential Property Claims Guide, accessed November 6, 2026
• California Department of Insurance: Residential Insurance, Homeowners and Renters, accessed November 6, 2026
• California Health and Safety Code section 17920.3 (substandard building conditions), copy read on california.public.law, accessed November 6, 2026
• Contractors State License Board: Disaster Help Center, unlicensed contractors after disasters, accessed November 6, 2026
• Office of the State Fire Marshal: Fire Hazard Severity Zones, accessed September 26, 2026
• City of Rancho Cucamonga: Special Districts (community facilities districts), accessed September 26, 2026

Mr. Cali Offers is not a contractor, insurance adviser or law firm. Cash offers come from independent buyers and investors who buy for their own account and may resell for profit; a cash offer is generally below what the open market would bring. Any value shown is a preliminary estimate, not an appraisal. Nothing here is legal, tax or financial advice.