Estimating

What are general conditions in construction?

General conditions has two meanings: the standard contract terms that govern how a construction project is run, and the time-based job costs of running the site, such as supervision, trailers, and temporary utilities.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

Ask an attorney what general conditions are and you will hear about a contract document. Ask an estimator and you will hear about the cost of the superintendent and the job trailer. Both are right. In contracts, the general conditions are the standard terms that set out the rights and duties of the owner, contractor, and architect. In estimating and job costing, general conditions are the job-specific overhead costs of running the site, which are not part of any one trade's work.

Meaning 1: the contract document

The best-known example is AIA A201, General Conditions of the Contract for Construction. AIA describes A201 as the keystone of its conventional family of documents: it is incorporated by reference into owner-contractor agreements and sets out the relationship of owner, contractor, and architect. It covers topics such as payments, changes, time, insurance, claims, and termination. Owners then add supplemental conditions to modify those terms for the project. Together with the agreement, drawings, and specifications, they form the contract documents.

Meaning 2: general conditions costs

These are the costs that exist because the job is running, and they grow with time rather than with quantities. Typical items:

  • Project manager and superintendent time on the job.
  • Job trailer, storage containers, and office equipment.
  • Temporary power, water, toilets, and fencing.
  • Dumpsters and cleanup.
  • Small tools, safety supplies, and signage.
  • Permits and testing, when they are the contractor's cost.

How general conditions costs work on a real job

A GC prices a 26-week, $2.8 million retail building. General conditions are estimated weekly:

Example: weekly general conditions estimate
ItemPer week26 weeks
Superintendent (burdened)$3,400$88,400
Project manager, 40% allocation$1,300$33,800
Trailer, toilets, fencing$650$16,900
Dumpsters and cleanup$700$18,200
Temporary power and water$300$7,800
Total$6,350$165,100

If the job runs 4 weeks long, general conditions cost about $25,400 more. That is why delays hurt even when no trade work changes, and why delay claims ask for extended general conditions. Some owners treat general conditions as a fixed lump sum; on GMP contracts they are often a negotiated, auditable line.

Common mistakes

  1. Pricing general conditions as a percentage of cost instead of building them from the schedule.
  2. Cutting them on bid day to win, then losing money every week.
  3. Mixing general conditions with company overhead, so neither is tracked well.
  4. Not reading the A201 or the owner's supplemental conditions, which may change payment, notice, or claim terms.

Related terms

See indirect costs, mobilization, soft costs, and delay claim. Smart Business Automator's job costing and WIP views track general conditions by week against the estimate.

Frequently asked questions

Are general conditions the same as overhead?

No. General conditions are job-site costs for one project. Company overhead covers the main office and costs shared across all jobs.

What is AIA A201?

The AIA's General Conditions of the Contract for Construction, a widely used form that sets out the duties of owner, contractor, and architect and is incorporated into the owner-contractor agreement.

What are supplemental conditions?

Project-specific changes and additions to the general conditions, written by the owner or architect for that job.

How are general conditions billed?

Often as a line on the schedule of values, billed monthly in proportion to time elapsed or as a fixed amount per month, depending on the contract.

Sources

  1. AIA Contract Documents: Summary of A201-2017, General Conditions of the Contract for Construction
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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