How to Compare Contractor Bids (Without Getting Burned)
Most homeowners pick the lowest bid. Here’s why that’s a mistake — and how to compare bids the right way.
Why Bids Look So Different
A $40,000 bid and a $60,000 bid for the same project may not actually be for the same job. Contractors make dozens of assumptions when pricing work — and those assumptions rarely show up on paper. Three things account for most of the spread:
Scope differencesOne bid includes demo and haul-away. Another assumes you handle it. One covers the adjacent drywall damage; another stops at the project boundary. The line items tell you what's actually priced.
Material quality differences"Tile" can mean $2/sq ft ceramic or $18/sq ft porcelain. "Cabinets" can mean stock boxes or semi-custom. Without specified brands or grades, you cannot compare material costs.
Hidden exclusionsThe lowest bid often wins by leaving things out — permits, inspections, cleanup, or work that everyone assumes is included but nobody wrote down. What isn't in the bid will show up as a change order later.
What to Look for in Every Bid
01Is the scope itemized line by line, or is it a single lump sum?
02Are materials specified by brand, product line, or grade — or left as "standard"?
03What is explicitly excluded from the bid?
04Does the bid include permit fees, or are those billed separately?
05What is the payment schedule — and does it front-load money before work starts?
06Is there a written warranty on labor, and for how long?
Red Flags in a Bid
Unusually low total with no explanation for how they hit that number
No line items — just a single dollar amount for the whole job
Vague material descriptions: "standard cabinets," "builder-grade fixtures," "similar tile"
Payment schedule that collects 40–50% upfront before a shovel hits the ground
No mention of permits — either who pulls them or whether they're included
How to Make Bids Comparable
The apples-to-apples problem is real. Most homeowners get bids and then try to figure out what each one actually covers — after the fact. That’s backwards. To fairly compare bids, you need to set the conditions before contractors price anything:
The same written scope sent to every contractor before bids go out
The same material specifications — product name, grade, or at minimum quality tier
The same timeline expectations, including start date and key milestones
When every contractor bids on the same written scope with the same material specifications, a $40,000 bid and a $60,000 bid become genuinely comparable. The difference is either labor rate, margin, or a conversation worth having — not hidden assumptions you’ll discover mid-project.
RenoTab makes bids comparable by design.
Homeowners define the scope before contractors bid — so every bid you receive covers the same work. No more guessing which number is real.