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Module 3 For Construction intermediate 60 min

Estimating with AI

AI estimates words, not dollars. The pricing stays yours.

Build a Clean, Line-Item Estimate Worksheet (You Keep Every Number)

You are the GC on a roughly $3.0M ground-up medical office building, lump sum, prime contract directly with the Owner. You self-perform concrete (about $420K) and rough carpentry, and you sub out MEP, site work, and finishes. Bid day is close and your takeoff is scattered across notebooks, a spreadsheet, and three sub bids that just landed. You want AI to turn the mess into a clean, organized estimate worksheet so nothing falls through the cracks. AI is the new apprentice that sets up the columns and carries your quantities into the right rows. It never sets a price, a unit cost, a total, or invents a quantity. Every number stays yours, and you sign the bid.

Recommended tool

claude

Claude is strong at organizing messy inputs into a clean, consistent table, holding a strict rule (carry only the quantities I give, never price), and producing the worksheet plus a gap list as one coherent package you can paste straight into your own spreadsheet.

Bring to the exercise

  • Your self-perform concrete takeoff (quantities only: CY of concrete, SF of slab, LF of footings, tons of rebar, etc.)
  • Your rough carpentry takeoff quantities
  • The sub bids you have in hand (MEP, site work, finishes) as lump sums, with which scope each covers
  • The CSI divisions or cost codes you estimate by (or your own category list)
  • Your own labor and material unit costs (you keep these, AI never supplies them)
  • The general conditions / general requirements line items for this job (supervision, temp facilities, dumpsters, etc.)
  • Your GC fee and overhead and profit basis (about 12 to 15 percent, you set the exact number)
  • Any allowances, alternates, or unit-price items the bid form requires
  • A past estimate where a missing line or a double-count cost you margin (the lesson you bring)

Step 1 of 8

Build Your Approach

Step 1

Build Your Approach

Separate what only you can do (every number, every scope call, the fee, the signature on the bid) from what AI can do (organize rows, carry your quantities, check for gaps). You stay the foreman; AI is the apprentice setting up the worksheet.

What to substitute before pasting

  • [PROJECT TYPE] The kind of building, e.g. single-story medical office building.
  • [CONTRACT VALUE] Round, illustrative total, e.g. $3.0M.
  • [SELF-PERFORM SCOPE] What you self-perform, e.g. concrete and rough carpentry.
  • [NUMBER OF SUB BIDS] How many sub bids you are rolling in, e.g. five.
I am the GC putting together a line-item estimate worksheet for a [PROJECT TYPE] bid worth about [CONTRACT VALUE]. I self-perform [SELF-PERFORM SCOPE] and I am rolling up my own takeoff plus [NUMBER OF SUB BIDS] sub bids.

Before we touch any numbers, help me draw a clean line between two things:
1. What MUST stay mine as the estimator: every quantity, every unit cost, every total, the fee, the markup, which scope each sub covers, and the signature on the bid.
2. Where you can help: structuring the worksheet, carrying the quantities I give you into the right rows, keeping categories consistent, and flagging anything that looks missing or double-counted.

List what falls on each side of that line. Then ask me where my own estimating judgment is most essential on this job so we both know where you stop and I take over.
What good output looks like
  • Puts every quantity, unit cost, total, fee, and the bid signature firmly on YOUR side of the line.
  • Limits its own role to structure, carrying your numbers, and flagging gaps, not producing numbers.
  • Asks where your estimating judgment matters most on this specific job before moving on.

Verify before using AI's output

Draft the Scope-Clarification Letter You Send Before You Commit a Price

You are the GC bidding a roughly $3.0M ground-up medical office building, lump sum, prime contract with the Owner. You self-perform concrete (about $420K) and sub out MEP, site work, and finishes. The plans and spec have soft spots that could blow your margin: the soils report hints at rock or unsuitable material at the footings, two divisions disagree on who furnishes a piece of equipment, and the spec references a detail that is not on the drawings. Before you commit a number, you send a scope-clarification letter to the Owner and Architect that states your inclusions, exclusions, and assumptions in writing. AI is the apprentice that helps you hunt the ambiguities and draft clean, professional language. It never sets a price and it never makes a binding commitment. You find the risk, you make the calls, and you sign the letter.

Recommended tool

claude

Claude is strong at reading dense spec and plan language for conflicts and gaps, drafting clear and non-combative professional correspondence, and holding the hard rule that it clarifies words and asks questions but never sets or implies a price.

Bring to the exercise

  • The plans and specifications for the bid (or the sections you are unsure about)
  • The bid form and instructions to bidders (what the Owner says is in or out of scope)
  • The divisions or trades you are pricing, and which you self-perform vs sub
  • The spots you already suspect are ambiguous (gaps, conflicts, missing details, vague allowances)
  • Your standard inclusions and exclusions for a job like this (your boilerplate, in your words)
  • The assumptions you are willing to bid on if you get no answer (and the ones you are not)
  • Who the letter goes to (the Owner, the Owner's Rep, the Architect) and the bid deadline
  • A past bid where an unclarified scope item turned into a fight or a margin hit (the lesson you bring)

Step 1 of 8

Build Your Approach

Step 1

Build Your Approach

Separate what only you can do (decide what is in or out, set assumptions, choose what to price, sign the letter) from what AI can do (spot ambiguities, organize, draft language). You stay the foreman; AI is the apprentice that reads closely and writes cleanly.

What to substitute before pasting

  • [PROJECT TYPE] The kind of building, e.g. single-story medical office building.
  • [CONTRACT VALUE] Round, illustrative total, e.g. $3.0M.
  • [WHO IT GOES TO] The recipient, e.g. the Owner and the Architect, or the GC if you are a sub.
I am the GC bidding a [PROJECT TYPE] worth about [CONTRACT VALUE], lump sum. Before I commit a price, I am sending a scope-clarification letter to [WHO IT GOES TO] that states my inclusions, exclusions, and assumptions and asks for answers on the ambiguous parts.

Before we draft anything, help me draw a clean line between two things:
1. What MUST stay mine: deciding what is in or out of my scope, what assumptions I am willing to bid on, what I refuse to carry without an answer, anything about price or money, and the signature on the letter.
2. Where you can help: reading the plans and spec for conflicts and gaps, organizing my inclusions and exclusions, drafting clear and professional language, and making sure the tone stays firm but collaborative.

List what falls on each side. Then ask me where my own construction judgment is most essential on this bid so you know where you stop and I take over. Remember: you help me clarify words and questions, you never set or imply a price.
What good output looks like
  • Puts every scope decision, assumption, and the signature on YOUR side of the line.
  • Limits its own role to reading, organizing, and drafting words, never price.
  • Asks where your judgment matters most on this specific bid before moving on.

Verify before using AI's output