Contracts

What is an owner-contractor agreement in construction?

An owner-contractor agreement is the prime contract between the party paying for a project and the contractor building it. It sets the price, the scope, the schedule, and how payment, changes, and disputes are handled.

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The owner-contractor agreement is the top contract on a job. Everything else hangs off it: the subcontracts, the supplier purchase orders, the bonds, the pay applications. It is usually a short agreement form that pulls in a larger set of contract documents by reference, such as general conditions, supplemental conditions, drawings, specifications, and addenda.

On small residential jobs it might be a few pages written by the contractor. On commercial work it is often an industry standard form with owner edits.

What the agreement covers

  • Parties and project: who the owner and contractor are, the site, and the architect if there is one.
  • Contract sum and payment basis: a stipulated sum, cost of the work plus a fee, or cost plus a fee with a guaranteed maximum price.
  • Contract time: start date, substantial completion date, and any liquidated damages.
  • Payment terms: pay application timing, retainage rate and reduction, and final payment conditions.
  • Enumeration of documents: the list of drawings, specs, and addenda that make up the contract.
  • Dispute resolution: mediation, arbitration, or litigation.
  • Insurance and bonds, often in an exhibit.

Common standard forms

The American Institute of Architects publishes the most widely used family. AIA describes its A101-2017 as the owner-contractor agreement for use where the basis of payment is a stipulated sum (fixed price), suitable for large or complex projects. It adopts the A201-2017 General Conditions by reference and is drafted to be used with A101 Exhibit A, Insurance and Bonds. For smaller jobs, AIA points to A104-2017 for projects of more limited scope and A105-2017 for even smaller projects, such as residential or small commercial work. ConsensusDocs and owner-drafted forms are also common, and many public agencies use their own.

How it plays out on a real job

Say a GC is signing a $2.6 million stipulated-sum agreement for a two-story office. The owner's attorney sends a standard form with a 12-page rider. The GC's PM reads the rider and finds three edits: retainage at 10 percent with no reduction, a 5-day notice window for claims, and a clause making the GC responsible for design errors in owner-furnished drawings.

The GC pushes back on the design-error clause, agrees to a reduction to 5 percent retainage at 50 percent complete, and accepts a 14-day notice window. Then the PM does the step most contractors skip: making sure each subcontract flows down matching notice and retainage terms, so the GC is not stuck between a strict owner and lenient subs.

Common mistakes

  1. Reading the base form and skipping the rider, where the owner's real changes live.
  2. Leaving the document list vague, so nobody knows which drawing revision was priced.
  3. Not matching subcontract terms to the prime. See flow-down clauses.
  4. Accepting a schedule without float or weather days, then paying liquidated damages for normal rain.
  5. Ignoring the insurance exhibit until the certificate request arrives.

Related terms

See general conditions, supplemental conditions, contract sum, lump sum contract, and prime contractor.

Frequently asked questions

Is the owner-contractor agreement the same as the prime contract?

Yes. Prime contract is the general term for the contract directly between the owner and the contractor. The owner-contractor agreement is that contract's main signed document.

Do I have to use an AIA form?

No. AIA forms are common, but owners and contractors can use ConsensusDocs, agency forms, or a custom contract. What matters is that the terms are clear and fair.

What is the difference between A101 and A201?

AIA's A101 is the agreement itself (parties, price, time, documents). A201 is the General Conditions, the long set of rules on changes, payment, claims, and closeout that A101 adopts by reference.

Can subcontractors see the owner-contractor agreement?

Often they can ask for the relevant parts, especially when the subcontract incorporates the prime contract by reference. Subs should request it before signing.

Sources

  1. AIA Contract Documents: Summary of A101-2017, Owner and Contractor agreement, Stipulated Sum
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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