Cost Plan
A budget split into building systems that the design is held to.
Quick Answer
A cost plan is a structured breakdown of a construction budget into building elements or systems, such as substructure, superstructure, envelope, interiors, and MEP, each with a target cost. It is set early and updated as the design develops. The cost plan gives designers a budget to design to, rather than only testing the design's cost after the fact.
The Full Picture
A single project budget doesn't tell the design team much. Knowing the whole building can cost a certain amount doesn't tell the facade designer how much of that belongs to the facade. A cost plan exists to divide the budget into pieces each discipline can own, so cost is managed during design instead of discovered afterward.
Mechanically, cost plans are usually organized by an elemental structure. In the U.S. that is typically UniFormat, which groups cost by building systems rather than by trade as MasterFormat does. Each element carries a target cost, often expressed per unit of gross floor area or per element quantity, based on benchmarks, historical cost data, and the owner's quality expectations, plus separate lines for general conditions, contingency, and escalation.
In practice, the cost planner or preconstruction team issues the cost plan with the program and updates it at each design milestone. When one element runs over its target, the team either finds savings in that element, reallocates from another, or brings the decision to the owner. This is the core of target value design, where design proceeds to cost targets rather than the other way around.
In preconstruction, a cost plan is only as good as its update cycle. A plan set at concept and never revisited becomes a historical document. A plan updated at each milestone, with changes reconciled, gives the owner early warning while design changes are still cheap.
Real Examples
Common Misconceptions
People assume: A cost plan is just an early estimate.
Actually: An estimate predicts what the current design will cost. A cost plan sets targets the design must meet. The difference is direction: the plan drives the design, and estimates test it.
People assume: Cost plans only matter on large projects.
Actually: Any project with a fixed budget benefits from knowing how that budget is split. Smaller projects often have less contingency, so an element that overruns early can consume the entire margin.
Does MeltPlan Solve This?
Partially — adjacentPartially — MeltPlan handles quantity takeoff, which supports updating a cost plan once drawings exist. MeltPlan's AI pulls quantities from each drawing issue and US estimators verify them, so you can check measured quantities against your element targets at each milestone. Setting the cost plan and its targets before drawings exist is outside MeltPlan's scope.
Check each design milestone against your targets →Frequently Asked Questions
What is the difference between a cost plan and a cost estimate?
A cost estimate predicts the cost of a given design. A cost plan allocates the budget across building elements and sets targets that the design should meet. Estimates at each milestone are then compared to the cost plan.
How is a construction cost plan structured?
Usually by building element or system, commonly using UniFormat in the U.S., with target costs per element plus separate lines for general conditions, contingency, escalation, and fees.
Who prepares a cost plan?
An owner's cost consultant, the construction manager's or GC's preconstruction team, or sometimes the design team's cost estimator, depending on the delivery method.
How does a cost plan relate to target value design?
Target value design uses cost targets as a design input. The cost plan is the tool that holds those targets and tracks each element's current estimate against them.