DESIGN-BUILD CONTRACTOR E&O INSURANCE
Professional Liability and Errors & Omissions coverage built for design-build firms, integrated project teams, and contractors taking on full design responsibility. Protection against design errors, designer-of-record claims, and breach of professional duty allegations under single-source delivery.
DESIGN
BUILD
WHAT IS DESIGN-BUILD CONTRACTOR E&O?
Coverage that responds when an owner alleges that the design-build firm's professional services — including design responsibility — caused them harm.
DESIGN-BUILD CONTRACTOR E&O — also called Design-Build Professional Liability or Single-Source Professional Liability — protects firms holding combined design and construction responsibility on design-build projects. Coverage responds when an owner alleges that an error in the design, construction, or coordination between the two phases caused them financial loss.
The design-build delivery model has reshaped construction risk allocation. By consolidating design and construction under one contracting entity, owners get a single-source point of accountability — but the design-build firm assumes FULL DESIGN RESPONSIBILITY typically held by independent design professionals. This shift creates a unique exposure profile that standard A&E policies and contractor PL policies often do not address adequately on their own.
The coverage typically pays DEFENSE COSTS, SETTLEMENTS, AND JUDGMENTS arising out of the rendering or failure to render design and construction professional services as a single-source provider. Most policies are written on a CLAIMS-MADE basis with retroactive dates and extended reporting period options.
SINGLE-SOURCE DELIVERY VS TRADITIONAL
Design-build consolidates design and construction risk under one entity — fundamentally changing the contractor's exposure profile.
DESIGN-BID-BUILD
SINGLE-SOURCE DELIVERY
WHAT DESIGN-BUILD E&O TYPICALLY COVERS
Core protections built into a properly structured Design-Build Professional Liability policy.
FULL DESIGN RESPONSIBILITY
Coverage when the design-build firm holds full designer-of-record responsibility — typically restricted or excluded under traditional contractor policies.
DESIGN ERRORS & OMISSIONS
Defense and indemnity for claims arising from errors in drawings, specifications, calculations, or design intent on a design-build project.
DESIGN-CONSTRUCTION COORDINATION
Coverage for claims tied to coordination failures between design and construction phases — a unique exposure created by single-source delivery.
PROGRAM REQUIREMENTS
Defense for claims alleging the design did not meet owner program requirements, performance specifications, or RFP criteria.
DESIGN SUBCONSULTANTS
Coverage for claims arising out of work performed by architects, engineers, and design subconsultants engaged by the design-build firm.
DEFENSE COSTS
Attorney fees, expert witnesses, court costs, and settlement negotiations — even for groundless suits.
PRIOR ACTS COVERAGE
Retroactive dates protect against claims for past projects — critical because design-build defects can surface a decade after completion.
RECTIFICATION COVERAGE
Available on some policy forms — coverage for the cost of fixing professional services errors on the project before they become third-party claims.
DESIGN-BUILD DELIVERY VARIANTS
The two dominant design-build sub-types carry distinct exposure profiles — coverage scales with the model.
BRIDGING DESIGN-BUILD
Owner engages a bridging architect to develop preliminary design and specifications. The design-build firm completes construction documents and builds from the bridging documents.
PROGRESSIVE DESIGN-BUILD
Owner engages design-build firm based on qualifications. The firm progressively develops design with the owner, then proposes a GMP after design is sufficiently advanced.
DESIGNER-OF-RECORD EXPOSURE
Design-build firms assume designer-of-record liability typically held by independent A&E firms — a fundamental risk shift.
DESIGNER-OF-RECORD LIABILITY
Under traditional design-bid-build, the architect or engineer of record holds professional design liability. Under design-build, THAT LIABILITY TRANSFERS TO THE DESIGN-BUILD ENTITY. The contractor — not an independent design firm — becomes the party owners pursue when design issues emerge.
Standard contractor policies typically exclude or restrict full designer-of-record exposure. Standard A&E policies typically exclude construction means and methods. Design-Build E&O bridges this gap — providing affirmative coverage for the unique combined exposure profile of single-source delivery.
DESIGN-BUILD PROJECT TYPES KIG WRITES
Coverage spans the full range of design-build project sectors — from vertical building to heavy civil and industrial.
WHY DESIGN-BUILD FIRMS GET SUED
The recurring patterns that drive Design-Build E&O claim activity.
THE LARGEST SOURCES OF DESIGN-BUILD CLAIMS include design errors carrying full DOR liability with no independent design professional to share blame, performance specification disputes where the delivered system fails to meet owner program requirements, and design-construction coordination failures that fall squarely on the single-source provider.
Other recurring patterns include BRIDGING DOCUMENT INTERPRETATION DISPUTES, code compliance issues, building envelope failures, MEP system performance shortfalls, and post-occupancy defects where the owner pursues the design-build firm directly without the traditional designer/contractor separation.
Disciplined RFP analysis, defensible bridging document review, peer-reviewed design submissions, and properly drafted design responsibility scope language form the first line of defense. A properly structured Design-Build E&O policy is the second.
REAL CLAIM SCENARIOS
How Design-Build E&O claims typically develop on real projects.
DESIGNER-OF-RECORD ERROR
A design-build firm's structural design contained calculation errors discovered during construction. As the designer of record, the firm absorbed full responsibility — there was no independent A&E to share liability. The owner pursued the firm for redesign, rework, and schedule impact damages.
PROGRAM REQUIREMENT MISS
A design-build firm delivered a building that did not meet square-footage requirements specified in the owner's program documents. The owner pursued the firm for the cost of additional construction and lost-use damages.
PERFORMANCE SPEC FAILURE
A design-build firm's HVAC system did not achieve the energy performance specifications committed to in the RFP response. Post-occupancy testing confirmed the shortfall. The owner pursued the firm for system modifications and operational cost differential.
BRIDGING DOC DISPUTE
A design-build firm completed construction documents based on a bridging architect's preliminary design. The owner alleged the completed design deviated from intended scope. The firm faced full liability under DOR responsibility despite the bridging document basis.
CODE COMPLIANCE FINDING
Post-occupancy review identified accessibility compliance issues with the design-build firm's design. The owner pursued remediation costs and resulting business interruption damages directly from the firm under single-source liability.
ENVELOPE FAILURE
Three years after occupancy, water infiltration was traced to the design-build firm's flashing detail design. The owner pursued the firm directly — without the buffer of a separate A&E firm — for remediation and damages under single-source liability.
RELATED COVERAGES & RESOURCES
Other coverages and reference pages that complement Design-Build Contractor E&O.
FREQUENTLY ASKED QUESTIONS
Common questions from design-build firms evaluating Professional Liability coverage.
WHAT IS DESIGN-BUILD CONTRACTOR E&O?
Design-Build Contractor E&O is Professional Liability coverage written specifically for firms holding combined design and construction responsibility. It responds to allegations that an error in design, construction, or coordination between the two phases caused an owner financial harm.
WHY DO I NEED DESIGN-BUILD E&O IF I HAVE CONTRACTORS PL?
Standard Contractors Professional Liability often restricts or excludes full designer-of-record exposure. Design-Build E&O is engineered specifically for firms holding full design responsibility — providing affirmative coverage where a CPL alone may leave significant gaps.
WHY DON'T A&E POLICIES COVER DESIGN-BUILD WORK?
Most A&E Professional Liability policies are written for independent design firms — they typically exclude or restrict construction means and methods, value engineering, and the contractor-side professional services that design-build firms perform. Specialty Design-Build coverage bridges that gap.
WHAT IS A CLAIMS-MADE POLICY?
A claims-made policy responds to claims first reported during the policy period — provided the work occurred after the retroactive date. Most Design-Build E&O policies are written claims-made.
WHY ARE RETROACTIVE DATES SO IMPORTANT FOR DESIGN-BUILD?
Construction defects often surface years after substantial completion. Statutes of repose extend liability well beyond project closeout. The retroactive date determines whether older project work remains covered when a claim eventually surfaces — particularly important for firms that took on full DOR responsibility.
WHAT IS TAIL COVERAGE?
Also called an Extended Reporting Period, tail coverage extends the time you can report claims after a claims-made policy expires. Critical when changing carriers, completing major projects, dissolving a JV, or transitioning corporate structures.
DOES DESIGN-BUILD E&O COVER SUBCONSULTANTS?
Many policies extend coverage to claims arising out of work performed by architects, engineers, and design subconsultants engaged by the design-build firm. Specific subconsultant wording should be reviewed before binding.
DOES DESIGN-BUILD E&O COVER POLLUTION CLAIMS?
Generally no. Pollution exposures are typically excluded and addressed through separate Contractors Pollution Liability coverage. Many design-build accounts carry both: Professional Liability for design and means/methods, and Pollution Liability for environmental exposures.
WHAT DOES DESIGN-BUILD E&O NOT COVER?
Common exclusions include criminal acts, fraud, intentional wrongdoing, known prior acts, return of fees, bodily injury and property damage (covered by GL instead), pollution exposures (typically requiring separate Pollution Liability), and warranties or guarantees beyond standard professional services. Specific exclusions vary by policy form.
WHY USE A SPECIALTY BROKER FOR DESIGN-BUILD E&O?
Design-Build E&O is one of the most specialized markets in construction Professional Liability. Most generalist carriers decline pure design-build risk or impose restrictive terms. A specialty broker accesses E&S markets that affirmatively write design-build, compares retroactive dates, exclusions, designer-of-record scope, rectification provisions, and tail options across multiple markets.