How to Find and Vet Contractors for Fix-and-Flip Projects

A Columbus flip. $185,000 purchase, $42,000 rehab budget. The contractor promised six weeks. He showed up for demo, then ghosted. Two weeks of silence. I had hard money at 12% — $1,850/month in interest. Every day he didn't show cost me $61. I found a replacement. The job ran 14 weeks instead of six. That's eight extra weeks of holding costs. Roughly $4,900 in interest alone. Plus insurance, utilities, taxes. The flip still penciled. Barely. A worse contractor and I'd have been underwater.

Bad contractors kill more fix-and-flips than bad deals. The numbers can be perfect. The ARV can be solid. One delayed or dishonest contractor and the whole thing unravels. Here's how to find them, vet them, and manage them so your rehab stays on budget and on schedule.

Where to Find Contractors (That Won't Ghost You)

Referrals beat cold calls. Every time. Ask other flippers at your local REIA. Post in BiggerPockets. "Who's your go-to contractor for a $40K rehab in [city]?" The ones with real experience will name names. The ones who got burned will tell you who to avoid. That intel is worth more than a dozen Angi leads.

Real estate agents who work with investors often have contractor lists. They've seen the same crews on multiple deals. They know who shows up and who doesn't. Ask your agent. If they don't invest themselves, ask who in their office does. Get that referral.

Drive-by. Find flips in your target neighborhoods. See who's working. Trucks, signs, activity. Knock on the door. "Who's your contractor? Mind if I get their number?" Most investors will share. They've been there. They know the pain of a bad contractor.

Angi and HomeAdvisor can work. But vet heavily. Reviews are gamed. Get references. Call them. Ask: "Did they finish on time? On budget? Would you use them again?" If the reference hesitates, move on. I've pulled two solid contractors from Angi in three years. I've vetted 40. The ratio is rough. Referrals first. Always.

The Bidding Process — 3 Bids, Same Scope

Get three bids. Minimum. Same scope to every contractor. Every line item. Every room. Kitchen: cabinets, countertops, backsplash, appliances. Bathrooms: vanity, tile, fixtures. Flooring, paint, HVAC service. If one bid says "kitchen remodel" and another breaks it into 12 line items, you're comparing apples to oranges. Standardize the scope. Then compare.

Line-item bids beat lump sum. You need to track rehab costs against your budget. A lump sum of $38,000 tells you nothing when the plumber finds a surprise. Line items let you see where the overrun came from. And they make scope creep visible. Every addition shows up as a new line.

The cheapest bid is almost never the right choice. A bid 30% under the others usually means one of two things: they're cutting corners, or they'll hit you with change orders later. I've seen both. Mid-range with solid references usually wins. And look for the most detailed scope of work. That contractor understood the job. They've done it before. They know what's in the walls.

Lock the Scope Before You Close

Walk the property with your contractor before you close. Not after. Before. Agree on every item in writing. Kitchen: cabinet style, countertop material, backsplash tile, appliance package. Bathrooms: vanity dimensions, tile pattern, fixture finish. No "we'll figure it out later." That's how scope creep starts. Lock it. Then require a written change order with price and timeline impact for every addition.

"While we're in here, want me to upgrade the vanity? Only $1,200." Sound familiar? That's the death-by-a-thousand-cuts. Ask: "Will it move the ARV?" If the contractor says probably not — comps are capped — say no. If they say yes, run the numbers. Does the ARV bump justify the cost? If not, no. Discipline here saves thousands. I've seen flippers add $7,000 in "only $X" items and cut their margin 20%. Lock the scope. Hold the line.

Payment Structure — Milestones, Not Upfront

Never pay more than 10% upfront. Ever. A contractor who demands 50% before demo is a red flag. They might need it for materials. Fine. But you need leverage. If they have half your money and they ghost, you're stuck.

Pay in draws tied to milestones. Demo complete. Rough-in complete — electrical, plumbing, HVAC. Finishes complete — flooring, paint, fixtures. Final walk-through, punch list done. Typical split: 30% at demo, 30% at rough-in, 30% at finish, 10% retainage until the punch list is clean. The retainage is your leverage. When they're 95% done and want to move to the next job, that 10% keeps them on your punch list. Without it, you're chasing them for the last outlet cover and the final paint touch-up.

Hard money draws align with contractor milestones. Your lender funds in stages. Your contractor gets paid in stages. Same rhythm. Plan it that way.

The 15% Contingency Rule

A 15% contingency budget on rehab costs is the minimum. $45,000 rehab? Budget $6,750 for surprises. One plumbing issue behind a wall. One electrical panel that needs upgrading. One permit that requires a structural fix. Any of those can run $2,000–5,000. Without a contingency, you're pulling from profit. Or worse — you're underwater. I've seen a $3,200 plumbing surprise on a $38,000 rehab. No contingency. The flipper cut finishes to compensate. The ARV came in $4,000 under. That's a double hit. Contingency isn't optional. It's insurance.

Insurance and Verification

Builders risk insurance during renovation. Not a standard dwelling policy. Builder's risk covers the structure while it's under construction. If a pipe bursts, a tree falls, or someone steals your copper, a rental policy often denies the claim. Builder's risk is built for this. Switch to it before demo. Switch back to a dwelling policy when the property is rent-ready or sold. A Jacksonville investor I know kept his rental policy during a rehab. Pipe burst. $16,000 in damage. Insurer denied — wrong policy type. He ate the cost. Builder's risk would've covered it. The premium runs $400–600 for a typical 3–6 month rehab. Cheap insurance.

Verify the contractor's license with your state board. Proof of liability and workers comp. Unlicensed work can create lien and liability issues. If a sub gets hurt and your contractor isn't insured, you can be on the hook. Check before you sign. I call the state board, confirm the license is active, and ask if there are any complaints. Takes 10 minutes. Saved me from a contractor with three open complaints last year.

What I Do Now

Three bids. Same scope. Line-item. Lock the scope before closing. Written change order for every addition. Payment in draws — 30/30/30/10. Never more than 10% upfront. 15% contingency. Builder's risk in place. License and insurance verified.

That Columbus flip taught me. The next one had a contractor who hit every milestone. On time. On budget. The difference wasn't luck. It was process.

For the full fix-and-flip playbook, start with the Fix-and-Flip guide. See how long rehabs really take — timeline — and what delays cost you: holding costs. A 3-month delay can turn $30K profit into $15K. The contractor is the variable you control. Get that right and the rest gets easier. Find them. Vet them. Lock the scope. Pay in draws. Hold the line on scope creep. Your margin depends on it.