AEC definitions

What Is Construction Administration?

Last reviewed: September 2026

Construction administration, or CA, is the architect’s or engineer’s service during construction. It includes answering RFIs, reviewing submittals, visiting the site, and certifying payments. The contractor still runs means, methods, and the schedule.

Abbreviation
CA
Provided by
The architect and engineers, under the design agreement
Core tasks
RFIs, submittals, site observation, payment certification
Not included
Means and methods, trade supervision, or the CPM schedule
Sits after
Bidding or negotiation, during the construction phase
Often confused with
Construction management

Definition

Construction Administration (CA)

After the construction documents are issued and a contractor is under contract, someone has to interpret those documents in the field. On AIA owner-architect agreements that service is construction administration, sometimes called contract administration. The architect is the owner’s representative for decisions about the documents, not the owner’s site superintendent. Visits are periodic. Submittal review checks conformance with the design, not every dimension a fabricator owns. Payment certification is based on observation, with the limits the agreement states. Owners who expect daily inspection, trade coordination, or schedule management are describing a construction manager or a clerk of the works, which is a different contract.

In depth

The work is interpretation of the documents

An RFI asks what the documents require. A submittal shows what the contractor intends to provide. A site visit compares visible work with those documents. A change, if one is needed, is issued through an ASI, a CCD, or a change order. CA is that loop, plus the logs that keep it from living in inboxes. Engineers of record administer their own disciplines, usually through the architect.

Response times are in the specifications or the general conditions. A late submittal review can delay fabrication as surely as a late shop drawing. CA staffing should match the volume. A fee that assumed a quiet job will not survive a hospital’s submittal count, and the drawings will not review themselves.

CA is not construction management

A construction manager or general contractor schedules trades, buys the work, coordinates the ceiling, and is on site every day. The architect’s CA visits are at intervals appropriate to the stage of construction. The architect does not supervise the contractor’s employees and does not control safety means. Reports that say "inspected and approved all work" overstate what a periodic visit can know.

Owners sometimes hire both an architect for CA and an owner’s representative or CM-as-agent for project controls. Those roles should have a written split. Two people answering the same RFI differently is worse than a slow answer. One log, one respondent for design intent.

Certifications have edges

When the architect certifies a pay application, the certification language matters. It is generally based on the architect’s knowledge, information, and belief from observations, not a guarantee that every concealed condition complies. Owners who treat the certificate as insurance will be disappointed. Contractors who treat a certified percent as permission to skip the documents will be too.

The architect may reject work that does not conform and may require testing. The contractor remains responsible for the work. CA does not shift construction responsibility onto the design firm. Professional liability and the construction contract answer different questions.

CA carries the project into closeout

Substantial completion inspections, punch lists, and review of closeout submittals are CA services on a typical agreement. They are also where fatigue sets in, because the fee was spent during the RFI peak. The certificate and the record documents still need the same care as a mid-job submittal. A punch list written from memory, without the specifications, misses the tests the owner actually bought.

Consultants must be funded through this phase. A structural or MEP engineer whose CA hours ended at 90% CD is absent when their shop drawings and RFIs arrive. The owner-architect agreement should include them for the construction phase, not only for producing the set.

Examples

Construction Administration (CA) on a real project

  • 01

    The architect reviews a curtain-wall submittal for conformance with the drawings and specifications and returns it with action codes.

  • 02

    A site visit report notes a wall built off the dimension, and the contractor corrects it without a change to the contract sum.

  • 03

    The owner’s CM updates the schedule while the architect answers the RFI the schedule is waiting on.

FAQ

Frequently asked questions

Construction administration is the architect’s service while the project is being built. Typical tasks are RFI responses, submittal review, periodic site observation, and certification of pay applications, as the owner-architect agreement describes them.

CA interprets and observes the design during construction. Construction management plans, coordinates, and often schedules the work on site. The contractor or CM directs means and methods. The architect does not.

The architect answers questions about the documents, reviews submittals, visits the site at appropriate intervals, prepares change paperwork the contract assigns, and evaluates pay applications. Engineers of record perform the same function for their disciplines.

On AIA agreements the construction-phase services are often called contract administration. In everyday firm language, CA means those construction-phase duties. It is not the owner’s full administration of every contract on the project unless the agreement says so.
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What Is Construction Administration? The CA Phase | Nomic