How Do Real Estate Investors Review Rehab Contractor Bids?

Why the Investor Review Process Differs From the Homeowner Review

A homeowner reviewing a contractor bid is primarily evaluating price and scope for their own comfort. A real estate investor is evaluating whether the bid supports a profitable exit.

That means the investor's bid review must answer three questions the homeowner never asks:

1. Does the total rehab cost, combined with acquisition and carrying costs, leave sufficient margin at the projected ARV?
2. Does the payment structure align with the lender's draw schedule, or will the investor need to fund gaps out of pocket?
3. Is the scope of work complete and verified enough that no undiscovered scope item can erase the projected margin?

FlipperForce describes the contractor bidding phase as the step where investors "evaluate contractor bids and determine the lowest qualified bidder" — but the qualification criteria for an investor are substantially different from a homeowner's checklist.

Step-by-Step: How Real Estate Investors Review Rehab Bids

Step 1: Build the Scope of Work Before Soliciting Bids

A scope of work (SOW) is the investor's most important pre-bid document. It defines every item of work required to bring the property to its target finish level. Soliciting bids without a written SOW produces incomparable proposals — each contractor is essentially pricing a different project.

The SOW should include:

• Every trade (demo, framing, electrical, plumbing, HVAC, drywall, tile, flooring, paint, fixtures)
• Finish level specifications (builder grade vs. mid vs. high)
• Material selections or allowance ranges
• Structural items identified during the inspection period

The Hard Money Co. emphasizes that the scope of work is also a lender document — hard money lenders often require a detailed SOW as part of the draw approval process. A SOW that is weak at bid time will create lender friction at draw time.

Step 2: Collect a Minimum of Three Bids

Three bids create a comparison baseline. When all three bids are roughly aligned, the market is pricing the scope accurately. When one bid is significantly lower, it is either missing scope or using a different specification. When one is significantly higher, it may include contingencies the others exclude.

FortuneBuilders' rehab methodology suggests multiple contractor walkthroughs to align on timeline and budget before committing. The investor walks with each contractor, shares the SOW, and sets a bid deadline.

Step 3: Run the ARV Model Before Accepting Any Bid

Before reviewing individual bid numbers, establish the ARV-based budget ceiling.

Standard fix-and-flip budget framework:

If the lowest qualified bid exceeds your maximum rehab budget ceiling, the deal economics do not work — regardless of how competitive the bid looks in isolation.

Step 4: Normalize Bids to the Same Scope

Real estate investors are especially exposed to scope gaps in contractor bids, because an excluded permit or missed structural item that would annoy a homeowner can eliminate an investor's entire margin. Each bid must be reviewed against the SOW for:

• Missing line items (trades or scope items in the SOW but absent from the bid)
• Allowances below realistic market cost for the target finish level
• Permit fees excluded from the bid
• Demo and haul-away not accounted for
• Structural contingency not priced

Add the estimated cost of any missing items to each bid before comparing totals. This process — scope normalization — is described in detail in CostCheckGPT's guide to scope normalization in construction bidding.

Step 5: Verify Draw Schedule Alignment

Hard money lenders and fix-and-flip loan products disburse funds in draws tied to construction milestones, not contractor payment schedules. If the contractor requires 50% upfront and the lender disburses 30% after demo is complete, the investor must fund the gap from reserves.

LendSure notes that fix-and-flip loan draws are typically disbursed after inspection of completed work, which means the contractor must be willing to perform work before full draw reimbursement. Investors should confirm this before signing a contract with a contractor who requires large front-loaded payments.

Standard draw schedule alignment check:

Step 6: Check for the Six Most Common Investor Bid Errors

Reedy & Company identifies the six mistakes most likely to destroy rehab ROI:

1. Underestimating repair costs — bids accepted without verifying against market rate data
2. Over-improving the property — specifications that exceed what comparables support
3. Ignoring ARV — accepting a bid that looks competitive but leaves no margin at exit
4. Hiring the wrong contractors — prioritizing low bid over verified track record
5. Poor project management — no draw alignment, no inspection protocol
6. Skipping permits — creates resale complications and liability

Step 7: Verify License, Insurance, and References

Independently verify:

• Contractor license status at your state licensing board
• General liability insurance certificate (name your LLC or entity as additional insured)
• Workers' compensation certificate
• At least two references from similar projects completed in the past 12 months

Unlicensed or uninsured contractors on a fix-and-flip create title, insurance, and resale complications that can exceed the apparent cost savings.

Investor Bid Review Reference Table

FAQ

Q: What is the 70% rule for fix-and-flip rehab budgets? The 70% rule states that an investor should pay no more than 70% of the property's ARV minus the estimated rehab cost. For example, if ARV is $300,000 and rehab costs $50,000, the maximum purchase price is ($300,000 × 70%) - $50,000 = $160,000.

Q: Should I use the same contractors as other investors in my market? Experienced investors often maintain a list of pre-vetted contractors with known pricing and performance histories. If you are new to a market, get referrals from local real estate investment associations (REIAs) and verify independently.

Q: How do I know if my contractor's bid is realistic for the market? Compare against cost benchmarks ($12–$60/sq. ft. for rehab scope per FortuneBuilders), get a minimum of three bids, and consider an independent estimate review from a service like CostCheckGPT to flag overpriced line items or missing scope.

Q: What is a draw schedule and why does it matter for bid review? A draw schedule is the disbursement plan your lender uses to release rehab funds as construction milestones are completed. The contractor's payment schedule must be compatible with the lender's draw release timing. Misalignment creates out-of-pocket funding gaps for the investor.

Q: How much contingency should a real estate investor reserve for rehab? 10–15% of the total rehab budget, per Reedy & Company. Properties built before 1975 or with known water damage history should use 15–20%.

Q: What does an independent bid review add to the investor's process? An independent review, such as CostCheckGPT's estimate review service, verifies that line-item prices are within market range, identifies missing scope items, flags unrealistic allowances, and provides a documented basis for negotiating with the contractor before signing.

For a pre-signing review, CostCheckGPT's contractor bid review service checks scope, allowances, exclusions, and bid risk before approval.

Get your contractor bid reviewed by CostCheckGPT