The renovation started. Nobody told the insurance company.

Tell the carrier before the first demolition day

There's no universal rule about what size of project you have to report, because the obligation lives in your policy rather than in a statute. What's close to universal is that homeowners forms carry conditions on three things a renovation touches at once.

• Material change in the risk. Taking off a roof, opening exterior walls or stripping a structure to the studs changes the condition of the insured property. That's different from a decorating choice.
• Vacancy and occupancy. Many forms treat a building that is vacant beyond a stated period differently, and some suspend or restrict specific perils entirely in that state. Whether a house under renovation counts as vacant depends on the form's own definition, so read it rather than assume it.
• Increase in hazard. Hot work, temporary heat, exposed framing, disconnected alarms and a disabled sprinkler system are all common on a job site and each one is a live conversation with an underwriter.

The rule we use is simple. If the project involves structural work, a permit, the roof, the building envelope, the electrical or plumbing systems, or an addition, tell the carrier before the work starts. If it's paint, cabinetry and appliances, tell them anyway. The call costs nothing, and the alternative is finding out at claim time.

What happens if you do not disclose it

Nobody can tell you in advance how a specific claim would go, and anyone who says otherwise is guessing. What can be said is where the levers are. A carrier that learns about undisclosed structural work may apply a vacancy provision. It may take the position that the loss came out of a condition it was never asked to underwrite. It may cancel or non-renew once it finds out through an inspection or a claim. None of that is automatic, and a phone call in the right month avoids all of it.

The other consequence is quieter and more common. The dwelling limit reflects the house as it was. After a real renovation the house costs more to rebuild than it did. If nobody updates the limit, you're underinsured on the new house while still paying for the old one, and you find that out at the worst possible time.

The point at which a homeowners form stops being appropriate

Small projects usually sit comfortably inside the homeowners policy, sometimes with an endorsement. There's a point where that stops being true, and it has less to do with the budget than with what's happening to the building.

• The house is still a house. Kitchen and bath work, windows, a re-roof, interior finishes, with the household still living there. Usually a disclosure and a limit adjustment, possibly an endorsement.
• The house has become a construction project. Structural alteration, a substantial addition, the building open to weather for an extended period, or the household moved out for the duration. This is where builders risk normally enters the conversation and where carrier permission for the arrangement matters.
• It's effectively new construction. A tear down and rebuild, or a renovation so extensive that little of the original structure carries through. At this end the project usually gets insured as construction from the start, with a homeowners policy written when it's finished.

Eligibility for each of those varies by carrier and by state, and gets decided in underwriting. What matters is working out which one your project is, because that tells you who to talk to and how early.

Builders risk, and who actually buys it

Builders risk is property insurance on a construction project. It covers the work in progress, and depending on how it's written it can reach materials, temporary structures, and property at other locations or in transit. It runs for the length of the project rather than for a year.

The question that matters most on a residential renovation is who the named insured is.

• Contractor purchased. Common on larger projects, and often required by the construction contract. The contractor controls the policy, the reporting, the claim and often the money. You may be added as a named insured or as an additional insured, and those two aren't the same thing.
• Owner purchased. You control the policy and the claim. That's often the better arrangement when you have a large existing structure at stake, because it keeps your interest and the existing building in the same conversation.
• Neither, because each assumed the other did. This happens more than it should. Read the construction contract's insurance article and the actual policy together, rather than taking a certificate of insurance as proof the right cover exists.

A certificate of insurance shows a policy existed on the day it was issued. It doesn't show the endorsements, and it won't tell you what the exclusions say. Ask for the policy, or have somebody read it for you.

The existing structure, and why it is the hard part

On new construction there's nothing there yet, so the builders risk value is the project value and the arithmetic is easy. Renovate an existing expensive house and two things are at stake at once. The work being done, and the house it's being done to. Getting the second one wrong is where this goes badly.

Some builders risk policies take in the existing structure and some don't. Where it's covered, it needs a value, and that value is the cost to rebuild the original house rather than the renovation budget. Where it isn't covered, the homeowners policy has to keep answering for it, which puts you straight back on the disclosure question and whatever the form says about vacancy.

Here's the version to avoid. The builders risk policy covers a $900,000 addition. The homeowners policy has been suspended or restricted because the house counts as vacant. A fire starts in the new work and takes the original structure, which nobody insured for the duration. Ask the direct question. Which policy is answering for the existing building on any given day of this project, and is that policy in force without restriction. Confirm the answer against both policies.

Occupancy during construction

Whether you can live in the house during the work is a construction question, a habitability question and an insurance question, and the three answers don't always agree. On the insurance side, carriers underwrite occupancy. Some allow it during a renovation. Some allow it with conditions about which systems stay live, where the work is confined and how the alarm is maintained. Some won't allow it at all.

Partial occupancy catches people out most often. Living in one wing while the other is gutted doesn't feel like vacancy to you, and it can look exactly like vacancy to the form. Get the arrangement in writing from the carrier before it starts. If you're moving out, ask what the policy needs from you while you're gone. Some forms require periodic inspection of a vacant dwelling, heat maintained during freezing weather, or water shut off at the main.

Materials in transit and in off-site storage

On a renovation like this the materials are often worth more than most people's whole house. Imported stone, custom windows, millwork built off site, antique fixtures, reclaimed timber and specialty tile all tend to sit somewhere other than the job site for weeks, and then travel.

Whether that's covered, and where, is one of the most variable parts of the whole arrangement. Builders risk policies often address property in transit and property at a temporary off-site location, but usually with separate sublimits, distance restrictions and conditions about who has custody. Your homeowners policy may answer for some of it and not the rest. The fabricator's own insurance is written for the fabricator, not for you.

Before the project starts, list every expensive item that will be built or held away from the site. Then confirm against the policies which one answers for each. Where the material is genuinely irreplaceable, which is common on historic and architecturally significant homes, that conversation may point somewhere else entirely.

What the contractor's insurance does, and what it does not

People regularly assume the contractor's insurance protects the house. It's worth being precise here.

• General liability answers for the contractor's legal liability for bodily injury and property damage to others. It's a liability policy rather than property coverage on your building, and it pays when the contractor is liable, not whenever something goes wrong.
• Workers compensation covers the contractor's employees. It's one reason an uninsured trade on a large project creates exposure that runs back toward you.
• Additional insured status on the contractor's liability policy can protect you for certain claims arising out of the contractor's work. How far it goes depends entirely on the endorsement used. It doesn't make the policy yours, and it doesn't cover your building.
• Subcontractors are the gap. Check that the subs carry their own coverage, and that the general contractor's contract requires it. The general contractor's certificate doesn't cover everybody on site.

There's also liability that runs to you directly. People are on your property daily, deliveries arrive, and there may be an open excavation or scaffolding out front. Read that alongside your personal umbrella, and check that the underlying limits it sits on are the limits it expects.

Delays, and why they matter to the policy

Builders risk is written for a project term, and projects run late. Permits stall, a trade walks, a structural surprise turns up behind a wall, materials arrive damaged or don't arrive at all.

The policy won't extend itself. Extension provisions vary, and some require a request before the expiry date. A lapse mid project is one of the genuinely serious outcomes here. Put the expiry date on the same calendar as the construction schedule, and treat any slippage as an insurance item rather than just a building one.

Delay reaches the homeowners side too. A three month project that turns into a fourteen month project can cross a vacancy threshold nobody thought about, or hit a renewal where the carrier asks questions nobody asked at the start.

Getting back to a completed value policy

The end of the project is a handoff, and handoffs are where things fall through. Two versions go wrong. A gap, where the builders risk term ends on substantial completion and the homeowners policy isn't back at full terms yet, leaving days or weeks with nothing answering properly. An overlap, where two policies sit on the same property for a while. That one is less dangerous, and it still produces an argument at claim time about which pays and in what order.

The sequence worth following is short.

• Confirm the date the project is complete for insurance purposes, which may not be the date the last trade leaves.
• Get a fresh reconstruction estimate on the finished house. A renovation that added a wing, replaced the kitchen and upgraded the finishes has changed the rebuild number.
• Reset the dwelling limit, and confirm the settlement terms against the new figure rather than the old one.
• Update the schedules. New built-ins, new art placement, a wine room, upgraded systems and any new outbuilding all belong on the policy.
• Tell the carrier about mitigation you installed during the work. A monitored water shutoff, an updated alarm, an upgraded roof, wildfire hardening. Some of it can affect eligibility or rating, and all of it matters at the carrier inspection that often follows a big renovation.
• Line the dates up so the builders risk ends the day after the homeowners policy is back at full terms, rather than the day before.

If the finished house is genuinely different from the one your current carrier underwrote, this is the natural moment to shop it rather than assume they're still the right fit. A declarations page review is the low commitment way to find out.

What we do on a renovation

We read the construction contract's insurance article and the actual policies together. We put the occupancy and disclosure questions to the carrier in writing. We work out whether builders risk belongs to you or to the builder, and put a value on the existing structure based on what it costs to rebuild rather than what it cost to buy. Then we calendar the expiry and the handoff, and do the completed value reset at the end so the finished house is insured as the finished house.

If the property carries other complications, a wildfire exposed location, historic construction or a rural or remote setting, the renovation is usually when those get dealt with too. Start at the private client hub or read the state pages for Oregon, Washington and Idaho.

Reviewed for insurance accuracy by Richard Sweet, owner of Vantage Point Risk and an independent insurance advisor. Last reviewed September 26, 2026. How we review this.