Construction Documents (CDs)
The drawings and specs that define exactly what will be built.
Quick Answer
Construction documents are the complete set of drawings and written specifications that describe a building in enough detail to be permitted, priced, and constructed. They follow design development and form the basis of the contract between owner and contractor. Gaps or conflicts in them become RFIs, change orders, and cost overruns during construction.
The Full Picture
Construction documents, often called CDs, are the final design phase deliverable. The architect and engineers convert the approved design development set into fully dimensioned plans, sections, elevations, details, schedules, and a project manual of written specifications. Every discipline contributes, including civil, structural, architectural, mechanical, electrical, and plumbing.
The set serves several purposes at once. Building officials review it to issue a permit, contractors use it to prepare bids, and the winning contractor uses it to build. Because the documents become part of the construction contract, their completeness and accuracy have legal and financial consequences, not just technical ones.
Specifications are organized by the CSI MasterFormat division structure in most US projects, covering general requirements, materials, and workmanship in written form. Drawings show where and how much, while specifications describe quality and performance. When the two disagree, the contract's order of precedence generally decides which governs.
Quality varies, and that is where preconstruction effort concentrates. Missing details, uncoordinated disciplines, and conflicting notes are common, and they surface as RFIs, addenda, and change orders. Reviewing the set before bid, comparing revisions, and checking scope across disciplines is a core part of how contractors protect their price.
Real Examples
Common Misconceptions
People assume: Construction documents are perfectly coordinated when issued.
Actually: Coordination gaps between disciplines are common even in well-run projects, which is why contractors review the set and issue RFIs before bid and during construction.
People assume: Drawings alone are the construction documents.
Actually: The set also includes the project manual with written specifications, and often addenda and general conditions. Requirements in the specs frequently do not appear on the drawings.
Does MeltPlan Solve This?
Partially — adjacentProducing construction documents is the design team's work, and MeltPlan does not author them. Once the set exists, MeltPlan's Design Review reads drawings and specifications to flag missing requirements, inconsistencies within the set, and changes between revisions, helping preconstruction teams find issues before bid.
Review construction documents for gaps before bid →Frequently Asked Questions
What is included in a set of construction documents?
Drawings for each discipline (civil, architectural, structural, mechanical, electrical, plumbing), a project manual with specifications, and typically general and supplementary conditions and addenda issued during bidding.
Are construction documents the same as blueprints?
Colloquially, yes. Blueprints is an older term for printed drawings, while construction documents is the formal term and includes written specifications as well as drawings.
What is the difference between a permit set and a bid set?
They are often the same drawings issued at different times. The permit set goes to the building department for review, and the bid set goes to contractors. Revisions from plan review may require updating one or the other.
Who is responsible for errors in construction documents?
Responsibility depends on the contract, applicable law, and the delivery method. In general the design team is responsible for design errors, while disputes are resolved under the owner's contracts.
What is the difference between drawings and specifications?
Drawings graphically show location, dimensions, and relationships. Specifications describe materials, performance, quality, and installation requirements in writing.