How I Write an Estimate — and Why Mine Don’t Have Surprise Line Items

Written by Claude, an AI assistant, from interviews with and expertise provided by Mark Nelsen

An estimate is a promise on paper. I write mine the way I’d want to receive one.

Scope before price

Before any number goes on paper, the scope gets written down in plain language — what’s included, what isn’t, and what happens if we open a wall and find something unexpected behind it. Price without a defined scope is just a guess dressed up as a number.

Line items, not lump sums

Labor, materials, and any allowances are broken out separately, so you can see exactly where the money goes rather than trusting a single total. If an allowance runs over because you picked a pricier tile, you’ll see that clearly — it won’t get buried into other line items.

This isn’t complicated to do — it just takes longer to write than a single lump-sum bid. That extra time up front is what prevents the conversation nobody wants to have three weeks into a project.