How Builders Risk Insurance protects a design guide

How Builders Risk Insurance protects a design before anyone moves in

8 July 2026

A design can take years to get right, and a bad storm can flatten months of framing before lunch. The stretch between groundbreaking and final occupancy is when a building is worth the most and covered the least.

Farmer Brown, a San Antonio commercial insurance agency that has covered contractors and construction projects since 1996, sees the same gap appear on residential builds and large commercial sites. The structure is standing, but nobody lives in it, and no business runs out of it yet, so a standard property policy will not respond to a loss. Builders risk insurance is what fills that window.

What builders risk insurance actually covers during construction

Builders risk is a form of property coverage written for a structure while it is being built or renovated. It covers physical damage to the project itself and to the materials staged on site, and it usually extends to the supplies awaiting installation. Fire, wind, theft, and vandalism are the most common claims. On a contemporary build with exposed glulam or an imported stone facade, the cost to replace damaged work mid-project runs far higher than the line items suggest, because the labor has to be redone and the schedule slips with it.

Builders risk attaches to the project, not to whoever owns it. Coverage usually begins when materials arrive and ends when the building is finished or occupied, whichever comes first. That timing matters on phased projects where one wing opens to tenants while another is still being framed.

How much builders risk insurance costs on a typical project

Pricing tracks the type of work. Farmer Brown writes new construction at roughly $0.30 per $100 of completed value, and renovation or rehab work at about $0.65 per $100, since older structures hide more unknowns once the walls come open. On a $2 million new build, that puts the builders risk premium near $6,000 for the full project term. A rehab of the same value lands closer to $13,000, because the existing structure adds exposure that a clean lot does not have.

General liability is a separate policy, and it gets priced on revenue rather than building value. A general contractor usually pays around 0.75 percent of annual revenue with a $1,600 minimum. Roofing work, which carriers treat as higher risk, runs closer to 1 percent with a $2,800 minimum. An architect who specifies steep rooflines or a complex membrane system changes the risk profile of the trades working under that design, and those numbers shift accordingly.

Design and material decisions that change the premium

The drawing affects the rate before a single permit gets pulled. Mass timber and engineered wood read differently to an underwriter than concrete and steel, because combustibility during the build phase drives the loss estimate. A project that stores $400,000 of custom millwork in an unsecured trailer is a different file than one with phased delivery and security on site.

Material choices that read as sustainable on paper can carry their own risk questions during the build, a tension explored in blending sustainable engineering with contemporary architecture. Site conditions count too. A coastal home faces wind and flood exposure that a sheltered urban infill lot does not. A vacant structure sitting idle between phases gets rated around 0.78 percent of value once liability and property are combined. Architects who flag these factors early give the contractor room to price the job honestly instead of swallowing a surprise later.

Why architects should care about a contractor’s coverage

An uninsured loss in the middle of a project does not stay the contractor’s problem. It stalls the schedule and puts strain on the client relationship. It can also drag the design team into a dispute over who owned the risk at the moment things went wrong. Confirming that builders risk and general liability are both in place before mobilization protects the architectural intent as much as it protects the budget.

The detail that took three rounds of revisions to get right is only as safe as the policy covering it while it goes up. Contractors and project owners can review coverage options with Farmer Brown before breaking ground, so the financial side of a build is settled while the design is still on the table.

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