The cheapest contractor bid is usually the most expensive one you'll ever accept. Here's the scenario every investor eventually lives through: three GCs walk your project, two bids come back around $58,000, and one comes in at $41,000. That low bid feels like found money — until you're 70% through the rehab, the money's 90% spent, and the change orders start.
This article is about how to read a contractor bid before you sign it — what the red flags look like, why they exist, and the five checks that catch a bad bid while it's still just paper.
Why Lowball Bids Exist
A bid that lands 25-30% under comparable bids usually isn't a better price. It's a different document. It's missing scope.
Some of that is sloppiness — the GC walked the house fast and priced what he remembered. But some of it is strategy. A bid is a sales document: it's written to win the job, not to finish it. A contractor who knows he's competing on price can leave out permits, underprice allowances, and skip site costs, knowing that once demo starts, you're not rebidding the project. Every gap in the bid comes back later as a change order — and change orders are priced without competition. The discount you thought you captured at signing gets recaptured from you, at retail, mid-project — when you have no leverage and the clock on your loan is running.
The problem compounds on a financed flip. Every week a project stalls while you argue over a change order is a week of carrying cost. A bid that was $15,000 light can cost you the $15,000, plus the delay, plus the leverage you handed a contractor who knows you can't afford to fire him at 70% complete.
Red Flag #1: One Number Instead of Line Items
A real bid prices the work separately: demo, framing, roofing, electrical, plumbing, HVAC, insulation, drywall, flooring, kitchen, baths, paint, exterior. A lump-sum bid — "$41,000, complete renovation per walkthrough" — tells you nothing, and that's the point. You can't see what's missing from a number.
Line items do two jobs. They let you compare bids on scope instead of price. And they become your management tool during the project — when draws are tied to line items, "are we on budget" is a question with an answer.
If a GC won't itemize, that's the whole red flag. You're not being asked to trust his price; you're being asked not to check it.
Red Flag #2: Allowances That Don't Match Reality
An "allowance" is a placeholder for something not yet selected — cabinets, countertops, fixtures, flooring. It's a normal bidding tool. It's also the easiest place to hide $10,000.
A $2,500 kitchen allowance on a house that needs an $8,000 kitchen isn't a bid. It's bait. The bid looks complete — there's a kitchen line! — but the number attached to it can't buy the kitchen your after-repair value depends on. When the real cabinets get ordered, the difference lands on you as a change order, and the GC is technically right: you exceeded the allowance.
The check: price the finish level your comps require — the standard the houses you're comparing against actually have — and hold every allowance against it. If you don't know what an $8,000 kitchen versus a $2,500 kitchen looks like, that's a conversation to have before signing, not at cabinet-ordering time.
Red Flag #3: No Permit Line
Permits cost money and time, and pulling them creates a public record with an inspector attached. A bid with no permit line means one of two things: you're paying for permits later, or the work is going in without them.
Unpermitted work is a deferred explosion. Your buyer's home inspector will find the new electrical panel with no permit on file. The appraiser may flag the addition. In a worst case, a municipal inspector red-tags the project mid-rehab and you're paying to open finished walls. Skipping a $400 permit can cost you the sale — or force a retail-price correction at the worst moment.
The check is one question: "Which permits does this project need, and where are they in the bid?" A good GC answers specifically. A GC who says "we don't really need permits for this" is telling you how he runs his whole business.
Red Flag #4: Nobody Priced the Site Costs
Dumpsters, debris hauls, temporary power, a porta-john, equipment rental. On a full gut, these run thousands of dollars — and they're the easiest lines to drop from a bid because they're not "the work." If nobody priced them, you own them.
This one is rarely strategic; it's just where sloppy bids leak. But the result is the same: a project that's over budget before the first wall is open, one $600 dumpster pull at a time.
Red Flag #5: Draws Tied to the Calendar, Not the Work
Payment terms are the part of the bid investors read last, and they're the part that determines who holds the risk.
A GC who wants a third of the contract before the first hammer swings is financing his last job with your project. Big deposits and calendar-based payments ("50% at start, 50% at midpoint") separate money from work — you can be 60% paid-out on a 30% complete project, and at that point, the leverage in the relationship has changed hands.
The structure that protects you: a modest mobilization payment, then draws released against completed, verified work. Materials-heavy trades sometimes need deposits — that's legitimate — but it should be for a specific order, not a percentage of the contract.
This is exactly how we run rehab holdbacks at HCF: money releases when the work is done and verified, not when a date arrives. It's not because we assume contractors are dishonest. It's because tying money to completed work keeps every party's incentives pointed at the same thing — a finished project.
What a Good Bid Looks Like
For contrast, the bid you want to sign: itemized by trade, with real numbers against a written scope; allowances that match your comp set's finish level; a permit line with the actual permits named; site costs included; a payment schedule tied to completed milestones; a start date, a duration, and the GC's license and insurance attached. A contractor who bids this way is showing you how he'll run the job.
When you get three bids, compare them scope-first: put the line items side by side and find what the cheap bid doesn't say. Ask each GC what the other bids missed — the answers are usually illuminating. Then pick the contractor whose paper matches reality, even when his number is bigger. The expensive bid that's complete is cheaper than the cheap bid that isn't.
Where Your Lender Fits In
When we underwrite a rehab loan, the scope of work and budget get pressure-tested before we wire anything — line by line, against what the property needs to hit its after-repair value. When a scope comes in $15,000 light, we say so before closing, while it's still the GC's problem and not yours. And on every loan with a rehab holdback, draw money releases against completed, verified work.
None of that replaces your own read of the bid. But it means that when you borrow from us, there's a second set of eyes on the budget whose incentive is the same as yours: a project that finishes.
If you've got a deal and a bid you want a straight answer on, call us at 804-208-0465.
Harvey Capital Funding makes first-lien rehab loans to real estate investors in Virginia. Past results are specific to their circumstances; every project is underwritten on its own numbers.