A hold harmless agreement in an Arizona construction contract is enforceable only to the extent it makes a party answer for its own fault. Three statutes set the boundaries. A.R.S. § 32-1159 governs general private construction and voids clauses that shift liability for the promisee’s sole negligence. A.R.S. § 32-1159.01 governs dwelling projects and goes further, voiding clauses that shift liability for any negligence by the promisee. A.R.S. § 34-226 governs public construction and limits indemnity to losses caused by the indemnifying party’s own negligence, recklessness, or intentional wrongdoing. Which statute controls depends on the project type, and clauses that ignore the applicable limit are void as a matter of law.
Commercial and Other Private Projects
A.R.S. § 32-1159 is the baseline rule for private construction contracts and architect-engineer service contracts in Arizona. It voids any clause that indemnifies, holds harmless, or defends the promisee against liability caused by the promisee’s sole negligence.1Arizona Legislature. Arizona Code 32-1159 – Indemnity Agreements in Construction and Architect-Engineer Contracts Void; Definitions
The word doing the work is “sole.” If the promisee (usually the owner or general contractor receiving the protection) is 100 percent at fault, no hold harmless clause can force the promisor to cover that loss. When fault is shared, however, an intermediate-form or limited-form indemnity clause can still be enforced. So on shopping centers, warehouses, office buildings, and other non-dwelling private work, a clause that requires a subcontractor to indemnify the general for losses on which both share fault is generally enforceable. A broad-form clause reaching the promisee’s sole negligence is not.
The statute applies only between private parties and expressly carves out agreements with the state or its political subdivisions, which fall under § 34-226.1Arizona Legislature. Arizona Code 32-1159 – Indemnity Agreements in Construction and Architect-Engineer Contracts Void; Definitions
Dwelling Projects Have a Stricter Rule
When a construction or architect-engineer service contract involves a dwelling, A.R.S. § 32-1159.01 replaces the general rule with a tighter standard. A hold harmless clause is void to the extent it covers liability resulting from any negligence of the promisee or the promisee’s employees, subcontractors, consultants, or agents (other than the promisor itself).2Arizona Legislature. Arizona Code 32-1159.01 – Indemnity Agreements in Construction and Architect-Engineer Dwelling Contracts Void; Definitions
The practical effect is significant. On a dwelling project, a clause that would force a subcontractor to cover the general contractor’s share of fault is void to the extent of that fault. Enforceable indemnity effectively shrinks to the promisor’s own negligence.
The statute defines “dwelling” by reference to A.R.S. § 12-1361, which ties it to residential construction.2Arizona Legislature. Arizona Code 32-1159.01 – Indemnity Agreements in Construction and Architect-Engineer Dwelling Contracts Void; Definitions The same subcontractor doing the same trade work can be under the general rule on a commercial project and under the dwelling rule on a home the next week.
Public Construction Projects
Public projects sit under A.R.S. § 34-226, and Arizona has preempted counties, cities, and towns from writing their own indemnity rules for public work.3Arizona Legislature. Arizona Code 34-226 – State Preemption; Indemnity Agreements in Construction and Design Professional Services Contracts Void; Definitions
A public agency may require a contractor, subcontractor, or design professional to indemnify and hold harmless the agency and its officers and employees, but only to the extent the loss was caused by the negligence, recklessness, or intentional wrongful conduct of the indemnifying party or those working under it.3Arizona Legislature. Arizona Code 34-226 – State Preemption; Indemnity Agreements in Construction and Design Professional Services Contracts Void; Definitions Anything beyond that is void.
Subcontracts on public projects can require the sub to indemnify both the agency and the prime, but the same fault-based ceiling applies. The statute does not prohibit insurance requirements or additional insured designations, so long as those requirements comply with the same limitation.
Defense Obligations Must Track the Promisor’s Work
Subsection D of § 32-1159.01 adds a separate restriction on contractual defense obligations. A clause requiring the promisor to defend the promisee is limited to claims that arise out of or relate to the promisor’s own work or operations.2Arizona Legislature. Arizona Code 32-1159.01 – Indemnity Agreements in Construction and Architect-Engineer Dwelling Contracts Void; Definitions
Without this guardrail, a general could draft a contract making a plumbing sub defend claims about roofing, electrical, or anything else on the job. The statute prevents that by anchoring the defense duty to the promisor’s scope. A sweeping clause like “Subcontractor shall defend Owner against any and all claims arising from the Project” is enforceable only to the extent the claim actually relates to the subcontractor’s work. The rest is unenforceable regardless of the wording.
Additional Insured Endorsements on Dwellings
The dwelling statute also addresses additional insured endorsements, and this catches parties off guard. On a dwelling project, an additional insured endorsement does not obligate the insurer to indemnify the additional insured for that party’s own percentage of fault.2Arizona Legislature. Arizona Code 32-1159.01 – Indemnity Agreements in Construction and Architect-Engineer Dwelling Contracts Void; Definitions
The duty to defend, however, stays intact. The statute expressly preserves the insurer’s obligation to provide a legal defense under the endorsement’s terms. An insurer on a dwelling project can be required to fund the defense of an additional insured while owing nothing on the indemnity side for that party’s share of fault. Anyone counting on additional insured status as financial protection on a dwelling job should read the endorsement with that split in mind.
Exceptions Written Into the Statutes
Both § 32-1159 and § 32-1159.01 include an accommodation exception. When a contractor needs access to a neighboring property and the owner allows access as an accommodation (not for that owner’s benefit), the contractor can fully indemnify the accommodating owner without running into the anti-indemnity limits.2Arizona Legislature. Arizona Code 32-1159.01 – Indemnity Agreements in Construction and Architect-Engineer Dwelling Contracts Void; Definitions
The dwelling statute lists additional categories of agreements that fall outside its restrictions:
- Agreements where a principal or indemnitors indemnify a surety on a payment or performance bond.
- Contracts between an insurer and its named insureds under an insurance policy.
- Wrap-up or controlled insurance program agreements between an insurer and all insureds under a single project-specific policy, though those agreements still cannot require one insured to indemnify another beyond the limits of subsections A, B, and C.
- Rules or tariffs of a public service corporation approved by the Arizona Corporation Commission.
Agreements between an insurer and additional insureds are also carved out, but they remain subject to the fault-based limitations in subsections A, B, and C.2Arizona Legislature. Arizona Code 32-1159.01 – Indemnity Agreements in Construction and Architect-Engineer Dwelling Contracts Void; Definitions
How the Three Rules Compare
- Commercial private projects under § 32-1159. Hold harmless clauses are void only when they reach the promisee’s sole negligence. Intermediate-form indemnity, where the promisor covers the loss so long as the promisor is also partly at fault, remains enforceable.
- Dwelling projects under § 32-1159.01. Hold harmless clauses are void to the extent they cover any negligence by the promisee. Only limited-form indemnity, tied to the promisor’s own fault, survives.
- Public projects under § 34-226. Indemnity is limited to losses caused by the indemnifying party’s own negligence, recklessness, or intentional wrongful conduct, and the state preempts local variations.
The same subcontractor working for the same general contractor can face very different obligations depending on whether the project is a shopping center, a single-family home, or a public school. Language that is fully enforceable on one type of job may be partially or entirely void on another.
What This Means for Drafting and Signing
On a dwelling contract, any hold harmless clause that reaches beyond the promisor’s own negligence is unenforceable to that extent. Tracking the statutory language keeps the contract clean and avoids fights during a claim about what the clause actually delivers.
On commercial private work, there is room to negotiate intermediate-form indemnity because § 32-1159 only voids sole-negligence clauses. Whether to accept that allocation is a business call, but the clause will hold up if a shared-fault claim arises.
Defense clauses need separate attention. Under the dwelling statute, a defense obligation not tied to the promisor’s scope of work is unenforceable, and keeping defense language work-specific is sound practice on every project type. Insurance requirements should be read alongside the indemnity provisions, especially on dwellings, where additional insured coverage will not answer for the additional insured’s own percentage of fault even though the defense obligation continues.