08/12/2026
The cheapest contractor bid can become the most expensive line item in a fix-and-flip.
A $20,000 lower estimate looks great on a spreadsheet.
It looks a lot less attractive if the project finishes six weeks late, change orders keep appearing, or the original scope was missing half the work.
For a renovation or new-construction deal, I think contractor underwriting should be treated almost like property underwriting.
Before selecting a contractor, I’d want to understand five things:
1. Are the bids actually comparable?
Three contractors can quote the same project and still be pricing three completely different scopes.
I’d normalize every bid into the same categories: demolition, electrical, plumbing, HVAC, framing, drywall, flooring, cabinets, finishes, permits, cleanup, and contingency.
That makes the gaps much easier to spot.
2. Can they prove they can execute?
I’d verify applicable licensing and insurance, then speak directly with recent clients.
Not just: “Did they do good work?”
I’d ask:
Did they stay near budget?
How did they handle delays?
Were change orders reasonable?
Would you hire them again?
3. How are payments structured?
I’d be very cautious about paying too much before work is completed.
A better structure ties payments to clearly defined milestones and completed work.
The contractor gets predictable cash flow.
The investor keeps leverage if the project goes sideways.
4. What happens when the scope changes?
Every renovation changes.
The important question is whether those changes are documented before the work happens.
Written change order.
Price.
Schedule impact.
Approval.
No surprises at the end.
5. What does a delay cost the investment?
This is the number investors sometimes underestimate.
If a flip has $6,000/month in interest, taxes, utilities, insurance and other carrying costs, a two-month delay isn’t just inconvenient.
It could mean another $12,000 out of the deal.
That’s why I wouldn’t automatically hire the lowest bidder.
I’d hire the contractor offering the best combination of price, ex*****on history, communication, financial discipline and schedule confidence.
Because on a value-add deal, you’re not just underwriting the property.
You’re underwriting the team that has to execute the business plan.
For the investors and developers here: what’s the biggest contractor red flag you’ve learned to look for?