The mental model

A construction project starts with a hole in the ground and ends with a finished building. During the months or years in between, the structure exists in an unfinished state and faces perils a finished building does not. Builders risk responds to those perils for the duration of construction.

The line shares structural DNA with both inland marine (because the property is mid-transit and frequently changing) and commercial property (because the eventual asset is a building). Most US builders risk is written by inland marine departments, on inland marine forms, with commercial property sensibilities applied to construction-specific risks. Where projects are large or international, additional structures (wraps, project-specific programs, multi-coverage layered placements) come into play. Where projects are small or routine, builders risk is often a simple line item on the contractor's portfolio program.

Course of construction coverage

The core of builders risk is course of construction coverage, which protects the project during the build period.

What it covers

• The structure being built. Buildings, foundations, fixtures becoming part of the project.
• Materials at the site. Materials owned by the insured intended to become part of the project.
• Materials in transit. Coverage extending from the supplier's facility to the project site, often a sub-limit.
• Materials in temporary storage. Materials staged at off-site storage facilities awaiting use.
• Site preparation. Excavation, utilities, foundation work.

Form types

• Named perils. Coverage for specifically listed perils (fire, lightning, vandalism, theft). The cheapest form.
• Broad form. Named perils plus additional coverages.
• All risks (special form). Coverage for all causes of loss except those specifically excluded. The dominant form for major projects.

Coverage period

Builders risk policies are time-bounded. The coverage period is set to match the projected construction schedule, typically with extensions available if the project runs over. Coverage typically ends at one of: scheduled completion, actual completion, occupancy, sale, or a defined end date. Each carrier has its own end-of-coverage triggers, and the choice matters when a project drags or completion is contested.

Soft costs and DSU

Beyond the physical construction, two types of additional cost can be insured.

Soft costs

Costs that would not have been incurred but for a covered loss extending the construction schedule. Architectural and engineering fees during the delay, financing costs (interest carry on construction loans), real estate taxes during the delay, insurance premiums for project policies, legal and accounting fees, marketing and leasing expenses for not-yet-rented space.

Delay in start-up (DSU) / Advance loss of profits (ALOP)

The big one. DSU covers lost gross profits from a delay in the project's commencement of operations caused by a covered loss. For a hotel, lost room revenue. For an office building, lost rent. For a manufacturing plant, lost gross profit on production. The indemnity period typically extends from the originally scheduled completion date until actual completion, sometimes capped at 12-24 months.

Why DSU matters disproportionately

For a major project (a billion-dollar refinery, a major hotel, a regional shopping center), the lost revenue during a delay can dwarf the physical damage cost of the underlying loss. DSU is often the single largest exposure on a major project's insurance program. The projected revenue assumptions and the indemnity period are the most heavily negotiated terms in major project placements.

OCIPs and CCIPs

For larger projects, individual contractor and subcontractor coverages are bundled into a single program covering the project. These wrap-up programs are administratively efficient and provide consistent coverage across the project's many participants.

What wraps typically include

• General Liability (covering owner, GC, and all enrolled subcontractors)
• Workers' Compensation (statutory coverage for construction workforce)
• Excess Liability / Umbrella
• Builders Risk
• Pollution Liability (often)
• Professional Liability for the design team (sometimes, often called PWP - project-wrapped professional)

Why wraps exist

On a major project, dozens or hundreds of contractors and subcontractors will work on the project. Each would normally bring their own insurance. Coordinating coverage, ensuring consistent limits, managing certificates of insurance, and avoiding gaps and overlaps becomes administrative overhead. A wrap centralizes coverage on a single program with consistent terms, eliminates the certificate-management problem, and often produces premium savings through aggregation.

Subcontractor enrollment

The operational core of a wrap is the subcontractor enrollment process. Each subcontractor working on the project must be enrolled in the wrap to be covered. Enrollment requires submitting documentation about the subcontractor's payroll, work scope, prior loss history, and other underwriting data.

Enrollment data

• Subcontractor identity and contract information
• Estimated payroll on the project (drives WC premium)
• Estimated contract value (drives GL premium)
• Work classification
• Subcontractor's prior loss experience
• Subcontractor's own primary insurance (where wrap is excess of subcontractor primary)

Audit at completion

Wraps are typically audited at project completion. Estimated payrolls and contract values are reconciled against actual figures. Premium adjusts up or down based on the audit. The audit is administratively complex and is one of the document-heavy stages of a wrap program.

The enrollment failure mode

Subcontractor enrollment that lags behind work in progress creates coverage gaps. A subcontractor doing work on the site without being enrolled is not covered by the wrap, and the wrap sponsor may face liability for losses involving that subcontractor that the wrap did not assume. Active enrollment management is a real risk-control discipline.

LEG defects exclusions

Builders risk forms exclude defective workmanship to varying degrees. The London Engineering Group (LEG) clauses are the standard wordings used to define what level of defect coverage applies.

The three LEG levels

• LEG 1. Excludes loss caused by defective design, materials, or workmanship, including resulting damage. The narrowest defect coverage; most defect-related losses are excluded.
• LEG 2. Excludes the cost of replacing or repairing the defective property itself, but covers damage to other property caused by the defect. The middle ground.
• LEG 3. Excludes only the cost of betterment (improving the property beyond its original specification) but covers the cost of remedying the defective work and the resulting damage. The broadest defect coverage.

Why LEG matters

Construction losses often originate in defective work. A foundation pour fails, a structural member is mis-installed, a subcontractor uses the wrong material. The defect itself causes resulting damage. Whether the policy responds and how depends on which LEG clause applies. LEG 3 is the most insured-friendly but commands premium. LEG 2 is the most common middle ground. LEG 1 is the most restrictive and is usually rejected on major projects.

Major project layers

For major projects, builders risk is one part of a larger project insurance program with multiple layers and coverages.

Typical major project program structure

• Builders risk primary. The base layer covering physical damage during construction.
• Builders risk excess layers. Multiple excess layers above the primary, building up to the project's full insured value.
• OCIP / CCIP wrap. The combined GL / WC / excess program covering the project's contractors.
• Project professional liability. Coverage for the design team's professional services on the project.
• Project pollution. Coverage for pollution events arising from project activities.
• DSU / ALOP. Delayed start coverage tied to the builders risk.
• Project bonds. Performance and payment bonds (a surety product, not an insurance product, but typically arranged alongside).

The integrated program approach

Major projects are increasingly placed as integrated programs where multiple coverages share information, share underwriting, and share the same broker team. The interrelationship of coverages on a major project is too complex to manage as separate placements.

Underwriting and rating

Builders risk is rated on the project's hard cost (the construction value, excluding land, design fees, and other soft costs). Rates vary widely by occupancy, construction type, and project complexity.

Key underwriting factors

• Project type. Residential, commercial, industrial, infrastructure. Different occupancies have different loss profiles.
• Construction class. Wood frame, masonry, steel, concrete. Higher construction class typically means lower fire load and lower premium.
• Project size and complexity. Single building vs multi-building, height, number of stories, complexity of MEP systems.
• Geographic location. Cat exposure (wind, quake, flood, wildfire), construction climate, security environment.
• Contractor experience. The GC's track record on similar projects. Major prior losses are a flag.
• Site security. Fencing, lighting, security personnel, fire watch, water supply.
• Schedule. Tight schedules can increase loss frequency; long schedules increase exposure duration.
• Hot work. Welding, cutting, roofing torches drive fire risk and underwriting requirements (hot work permits, fire watches).

The exposure curve

Builders risk exposure builds up over the construction period as more value is added to the site. A project at month 6 of an 18-month build has roughly 33% of the eventual exposure on site. Carriers and brokers track this exposure curve, and pricing reflects average exposure over the policy period rather than maximum exposure at completion.

Where IDP earns its keep

Construction insurance documents are dense: project specifications, hard cost breakdowns, contractor schedules, subcontractor enrollment forms, certificates of insurance, completion documents.

Indico use cases

• Hard cost extraction. Pull project hard cost breakdown from architectural and engineering schedules into a normalized form.
• Subcontractor enrollment processing. For wrap programs, automate the enrollment intake from subcontractor application forms.
• Certificate of insurance tracking. Validate subcontractor COIs against wrap requirements and surface gaps.
• Audit reconciliation. At project completion, reconcile estimated vs actual payroll and contract values from contractor reports.
• LEG and exclusion analysis. Surface LEG-related and other defect exclusion language in expiring vs renewal forms.