How to Read a Construction Bid Set | BuildBetterEstimates

Most bids aren't lost on unit prices. They're lost on scope nobody priced. A wall type called out on the architectural sheets but detailed only in the structural set, a housekeeping pad that appears on the mechanical drawings, a note in the specifications that makes the contractor responsible for patching after the electrician. None of these jump out on a quick scroll through the PDF, and every one of them costs money.

Here is the order we work through a bid set so those items get caught before the number goes out.

1. Start with the index, not the floor plans

Open the sheet index and check that every listed sheet is actually in the set. Missing sheets are common, especially on public bids where drawings are split across several files. If a sheet is missing, send an RFI straight away rather than guessing at what it shows.

2. Read the general notes and specifications first

General notes and Division 01 of the specifications set the rules for the whole job: who provides temporary facilities, what testing is required, whether allowances or alternates apply, and what the owner is supplying. These items rarely appear on a plan view, but they change the price.

3. Walk each discipline in sequence

Go through civil, structural, architectural, then MEP. For each discipline, take off quantities and note anything that refers to another sheet. Those cross-references are where scope gets lost. A detail bubble on an architectural wall section might point to a structural embed that nobody counted.

4. Build a scope checklist by CSI division

As you go, list every item under its CSI division. At the end, look for divisions with nothing in them. An empty division is either genuinely not in the project or something you haven't found yet. It's worth ten minutes to confirm which.

5. Check the addenda last, and again

Addenda often change quantities, swap products or add scope. Log each addendum, note what it changes, and update the takeoff. Then check the bid form to make sure you've acknowledged every one. Missing an addendum acknowledgment can disqualify an otherwise winning bid.

Common places scope hides

Equipment pads, curbs and supports shown only on MEP sheets
Fire-rated assemblies that change drywall layers and sealants
Demolition and patching on renovation projects
Blocking and backing for owner-supplied items
Testing, inspections and closeout requirements in the specifications

Reading a bid set this way takes longer than jumping straight to the floor plans, but it's the difference between a bid that holds up and one that leaves you paying for work you never priced.