The typical sequence looks orderly on paper. Design the project, then price it. In practice it often produces a loop: design, price, discover the project is over budget, redesign, reprice. Each turn of the loop costs design fees and months.
Why the loop happens
Every layout, specification and detail carries a price and a construction method. When pricing waits until the drawings are done, the cost of those decisions arrives all at once, after they are expensive to change.
Start the design team with validated facts
The design team should start on day one with a basis package: how the project gets approved, the standards and conditions the design has to meet, the site constraints and easements, confirmed utility capacity, the intended use and the unit-count basis. On manufactured and modular projects, it should also know the homes: floor plans, dimensions and foundation approach, worked out with the manufacturer. Design time then goes to designing, not to research the owner has already paid for once.
Estimate as the plans develop
Cost estimates tighten as design definition grows, and the industry recognizes that with estimate classes that move from order-of-magnitude to definitive. Once the plans carry measurable quantities, typically by design development, they can be estimated from a takeoff. From that point on, design decisions are made with their cost known, and materials and methods are settled with the licensed design professionals while changes are still cheap.
Hard bids still wait for complete plans. A contractor pricing an incomplete set has to price the risk of what is missing, through contingency, allowances or exclusions, and the owner pays for it either way.
What comes out the other end
- Approved plans, estimated as they were developed
- A Control Budget set before bids, so the market is measured against a fixed reference
- Bid documents on one schedule of values, so every bidder prices the same thing
- A design team that spent its time designing, not redrawing
General information, not legal, engineering or investment advice. Approval requirements vary by jurisdiction.