AIG vs 
Liberty Mutual: How Do They Compare for Builders Risk Insurance?
What Is AIG?
AIG is the marketing name for American International Group, Inc.; AIG says its insurance products are written or provided by subsidiaries or affiliates. Its U.S. business pages list commercial casualty, property, cyber, management and professional liability, and specialty programs, but a brand-level page does not identify the insurer for a particular policy. 1,2
What Is Liberty Mutual Business Insurance?
Liberty Mutual spans small-commercial, commercial, specialty, surety, and reinsurance businesses. The insurer and distribution route depend on the product, so check the offer and policy before you compare terms. 4,5
What Is Builders Risk Insurance?
Builders risk protects the project you are building, including materials meant for it, against physical loss until construction ends. The gaps that cost owners money are materials in storage or transit, the existing building in a renovation, and coverage ending when you occupy early. 8,9,10,11
Key Differences in Builders Risk Insurance
A Project Pause Versus Covered Construction Costs
AIG’s example addresses a paused project and an extension for the expected remaining work. Liberty Mutual’s product description instead names potential property components, including materials, labor, construction-management fees, temporary structures, and landscaping materials. If a pause could create extra costs while property remains on site, ask how the extension and those costs are treated under each proposed form. 3 6
Project Size and Portfolio Fit
AIG says it develops arrangements for small, mid-sized, and complex projects, including multi-year and multinational programs. Liberty Mutual discusses both single projects and portfolios, from buildings to infrastructure, while noting that thresholds belong to a named program option. Give both teams the same project values and schedule, then verify that any published threshold applies to the specific product being quoted. 3 6
What to Confirm in Builders Risk Insurance Quotes
- Ask AIG whether its standstill example applies to your project and ask Liberty Mutual which of the listed property components the chosen form covers. 3 6
- Ask Liberty Mutual whether your project falls under a program-specific value threshold or its broader portfolio offering. 3 6
- Confirm each insurer’s extensions, exclusions, limits, and deductible on the actual quote. 3 6
Review Scores
These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.
AIG
Review Score
2 rated sources
Customer ratings for AIG are low: Trustpilot shows 1.9 out of 5 from 252 reviews, and NerdWallet gives 2.5 stars and notes more claims complaints than expected. These pages cover many AIG products and countries, so they only loosely describe business insurance.[1][2]
Read AIG reviewsLiberty Mutual
Review Score
2 rated sources
Customers give Liberty Mutual 4.2 out of 5 on Trustpilot from 3,836 reviews, but that page mixes auto, home and life customers with business ones. For business insurance specifically, NerdWallet gives 3.0 out of 5 and reports more complaints than expected.[4][1]
Read Liberty Mutual reviewsOffering Details
AIG vs Liberty Mutual: Builders Risk Insurance: documented features by provider
| Criteria | AIG Builders Risk | Liberty Mutual Builder’s Risk |
|---|---|---|
| Role in This Line | AIG markets Builders Risk as a construction property insurance solution for single projects and master programs. AIG is the marketing name; the page says products are written or provided by AIG subsidiaries or affiliates and does not identify the issuing company for a particular policy. 3Company-reported. AIG’s U.S. Builders Risk product page and its general legal footer. This establishes AIG’s marketed product and issuer structure, not the insurer on an individual quote, binder or policy. | Liberty Mutual lists Builder’s Risk in its property portfolio and describes both a named proprietary form and a stand-alone Specialty Property offering. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
| Who It’s For | The page describes solutions for a range of construction projects, including small, mid-sized and complex projects, and says AIG develops domestic, multinational and multi-year arrangements. It also describes customized options for wood-frame structures. These are marketed capabilities, not eligibility guarantees. 3Company-reported. Project types and program configurations stated on AIG’s U.S. Builders Risk page. The page does not provide a complete underwriting appetite or state-by-state availability schedule. | The page addresses contractors and property owners with single projects or portfolios and describes construction projects ranging from buildings to infrastructure; its published project thresholds apply only to the named program option. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
| Coverage Features | AIG describes tailoring project coverage to construction risks and gives an example of arranging coverage for a project standstill and an extension for the expected remaining project term. These examples do not establish that any buyer is entitled to a standstill extension or that it is included in a policy. 3Company-reported. AIG’s illustrative Builders Risk marketing examples. The page directs interested buyers to the actual policy for coverage scope, limitations, terms, conditions and exclusions. | The builder’s-risk page describes protection during construction, including materials, labor, construction-management fees, temporary structures and landscaping materials; actual coverage remains form-specific. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
| Limits and Retentions | The reviewed product page does not state a standard policy limit, deductible or retention. AIG says coverage depends on the actual policy language; confirm the applicable amounts and conditions in the quote and issued policy. 3Not publicly disclosed. AIG’s U.S. Builders Risk marketing page as reviewed on 2026-09-30. No buyer-specific quote, declarations or policy form was reviewed; this is not a finding that such terms are unavailable from AIG. | The cited public overview does not establish the limits, deductibles, exclusions or form terms that would apply to a specific buyer. 6,7Not publicly disclosed. Ask for the quote and specimen or issued policy forms before treating a listed feature as covered. |
| Risk Services | AIG says its risk engineers can work with clients on loss-prevention improvements and customized service plans, including loss-control reports. The page describes these as risk services and does not make them policy coverage or a guaranteed loss outcome. 3Company-reported. Company-described services on the U.S. Builders Risk page; availability for a particular account is not specified. | Liberty Mutual describes property underwriting, risk-engineering and claims teams working together on complex property risks. 6,7Company-reported. Liberty Mutual’s cited product or program overview documents this description. It does not establish the issuing insurer for an individual quote, exact state or provincial availability, the policy form, complete exclusions, or terms offered to a particular buyer; confirm those in the quote and policy documents. |
| Claims Support | AIG states that, after property-damage coverage is confirmed, it promises working funds equal to 50% of its share of the agreed property-damage estimate within seven days. This is AIG’s stated claim-funding service condition; the page does not make it a general claim-payment deadline or establish policy entitlement for every loss. 3Company-reported. Conditional company statement on the Builders Risk page. It applies only as described there and remains subject to the actual policy and claim circumstances. | Confirm in your quote. |
Full Comparison
More AIG vs Liberty Mutual Comparisons
Other Builders Risk Insurance Comparisons
Sources
AIG
- Investor Relations. American International Group, Inc. (AIG); About AIG and legal footer; lines 244–246 and 327–331. Accessed 2026-09-28.
- Business. AIG US; Surplus Lines heading and paragraph, lines 357–359. Accessed 2026-09-28.
- Builders Risk Insurance. AIG US; ‘Why choose AIG Builders Risk Insurance?’ and ‘AIG Advantage’: lines 242–280, including project scope, tailored solutions, risk engineering and conditional claim-funding statement; policy-language and coverage caveat lines 365–366; legal footer lines 411–415. Accessed 2026-09-30.
Liberty Mutual
- Company Profile. Liberty Mutual Group; Strategic business units paragraph: US Retail Markets (individuals/small businesses; small commercial; countrywide) and Global Risk Solutions (mid-size/large businesses; commercial, specialty, reinsurance, surety; worldwide). Accessed 2026-09-29.
- Commercial Insurance Solutions. Liberty Mutual Business Insurance; Commercial solutions index names commercial auto and fleet, cyber, environmental liability, equipment breakdown, excess and surplus, general liability, healthcare liability, inland marine, management liability, multinational, ocean marine, professional liability, property, reinsurance, surety, umbrella/excess and workers compensation. Disclosure says policy insurer is named when offered, may be an affiliate/subsidiary or surplus-lines insurer; states/jurisdictions and actual policy terms vary. Accessed 2026-09-29.
- Property. Liberty Mutual Business Insurance; Property solutions section describes commercial property, business-interruption protection, Builder's Risk, Equipment Breakdown, Inland Marine and Ocean Marine; named Premier Property Protector, RM Select, and Liberty Mutual Property Protector product descriptions; states standalone and package options. Coverage terms depend on the policy. Accessed 2026-09-29.
- Builder’s risk. Liberty Mutual Business Insurance; Official product page: single-project or portfolio scope; contractors and property owners; Premier Protector — Builder’s Risk and stand-alone Specialty Property offerings; covered materials, labor, construction management fees, temporary structures and landscaping materials. Source also describes project-specific program design, underwriting and claims support. Accessed 2026-09-30.
Builders Risk Insurance Guide
- Glossary of Insurance Terms. National Association of Insurance Commissioners; Builders’ Risk Policies; Ocean Marine; Auto Physical Damage; All-Risk. Accessed 2026-09-16.
- Commercial Insurance Guide. California Department of Insurance; Commercial Property; Inland Marine; What Should I Expect from a Broker-Agent. Accessed 2026-09-16.
- Builders Risk Coverage Form. Insurance Services Office, Inc.; hosted by Touchpoint Markets; A.1–3 p.1; B.3.c p.11; C,D,E p.12. Accessed 2026-09-16.
- Builders Risk Application Tip Sheet. US Assure; General policy application tips p.1; Remodeling tips p.2. Accessed 2026-09-16.
