How to Choose the Right House to Flip Before You Make an Offer

Choose a house to flip by screening it against four questions before you touch a calculator: is the street right, are the problems cosmetic or structural, can you define the full scope of work honestly, and will the finished house actually sell there? A house that fails any one of those is a walk, no matter how cheap it is.

This page is for the moment after you've found a candidate. If you're still deciding what kind of houses to hunt, start with defining your buy box. If you don't have a candidate yet, the sourcing work lives at how to find houses to flip. What follows is the screening pass I run in the first fifteen minutes on a property. After 300+ flips, most of my money has been made right here, by saying no fast.

What makes a good house to flip?

A good house to flip is an ugly house on a good street: cosmetic problems that scare off retail buyers, sound bones underneath, and a neighborhood where renovated houses sell quickly to people who intend to live in them. You're buying the gap between how the house looks and what it could be, not the house itself.

"Ugly" means fixable ugly: dated kitchens, bad paint, worn floors, the smell of thirty years of cigarettes. Those problems are cheap relative to how much they suppress the price. "Good street" means the block can support the finished product, because you can transform a house and you cannot transform its location. Every experienced flipper I know has the same scar tissue: the deals that hurt weren't the ugliest houses, they were the wrong streets.

Does the street pass before you look at the house?

Screen the street first, because location problems are permanent and everything else is negotiable. Before I walk a property I want to know what the block tells me: are the neighboring houses maintained, are there renovated sales nearby, and is there anything next door that kills a retail buyer's interest?

The tells I check, in rough order:

• The neighbors. One rough house next door is survivable. A street where half the porches are sagging means your renovated house will be the nicest one on a block buyers don't want.
• Owner-occupancy. Streets full of homeowners sell flips. Streets that have quietly converted to rentals fight you on price and on appraisal.
• The unfixables. Backing to a highway, under power transmission towers, across from a scrapyard, in a flood plain. No renovation budget touches any of these.
• Evidence of the exit. At least one recent closed sale of a renovated house at your target price point, on that street or the next one over. Not a listing. A sale.

Fifteen minutes on a map and a slow drive down the block answers most of this. If the street fails, stop. Don't let a low asking price talk you into walking the house anyway.

Is the problem cosmetic or structural?

Cosmetic problems are your profit margin and structural problems are your risk, so the entire walkthrough is really one question asked over and over: which one am I looking at? Cosmetic means surfaces: paint, flooring, cabinets, fixtures, landscaping. Structural means the stuff that holds the house up and keeps water out, and it's where first-time flippers lose money they never see coming.

As a general contractor, I walk a house differently than most investors, and the difference is that I start where the money hides. Here's what actually moves the repair number:

• Foundation. Stair-step cracks in brick, doors that won't close, floors that slope toward a corner. Some movement is normal in an old house. Active movement is a different animal, and you won't price it from the sidewalk.
• Water. Stains on ceilings, rot at the roofline, a musty crawlspace, grading that dumps rain against the foundation. Water damage always goes further than what you can see.
• Roof and mechanicals as a package. Roof, HVAC, water heater, panel. Each is a known cost. The mistake is finding all four dead and still using the repair number you made up in the car.
• Layout. A choppy floor plan with tiny bedrooms and one bath is a structural problem wearing cosmetic clothes. Moving walls, adding a bathroom, or relocating a kitchen puts you into framing, plumbing, and permits, and the budget triples quietly.

I bought a house off market for $95,000, all in near $100,000 after closing, and penciled it as a $40,000 to $50,000 cosmetic job. Then we did the deep walkthrough and started opening things up. A single bedroom outlet somebody had added without a permit was the first tell, and behind it was a pattern: no bathroom vent, no kitchen vent, undersized wire on an oversized breaker. Once you start opening walls it becomes a give-a-mouse-a-cookie problem, every fix triggering the next one, and the real scope landed near $80,000. That house killed the flip and I wholetailed it instead. What I look for now, before I ever write the offer, are the pro-versus-DIY tells: unpermitted work, missing vents, wiring that doesn't match its breaker. Find one, assume there are ten, and price the full mechanicals, not the finishes.

None of this means walk away from every foundation crack. It means the price has to know about the crack. A structural problem with a firm bid and a fat discount can be a great deal. A structural problem you're guessing at is a coin flip with your rehab budget.

Can you write the full scope of work before you offer?

If you can't list every major line of work the house needs, you're not ready to make an offer on it. My rule: the scope of work gets written on the walkthrough, not after closing. Kitchen, baths, flooring, paint, roof, HVAC, electrical, plumbing, windows, exterior. Every line gets a number or a question mark, and every question mark gets resolved before the offer, not discovered after.

This is where my contractor background does the most work, because the expensive surprises are rarely on the surface. They're in the gap between what was built and what was permitted. That unpermitted addition on the back? When you renovate, the building department may make you bring it to current code, or tear it off. The finished basement with no egress window, the wiring the previous owner "upgraded" himself. On the walkthrough these read as finished square footage. To an inspector, they read as your problem now.

Here is one I have watched blow up more than once. You plan to move a toilet and a vanity, and the plumber quotes it like fixtures: five hundred a fixture, two fixtures, a thousand dollars. Then the rough plumbing inspection forces a water test on the drains and a pressure test on the supply lines. Old house, the drains leak and get torn out to fix them. The supply lines are galvanized, so the municipality makes you replace them all the way to the meter the moment you touch them. Then the camera down the sewer finds a break in the yard. That thousand-dollar vanity move is now a fifteen-thousand-dollar job, and the permit is already pulled, so you cannot walk it back. The trap isn't the permit. It's writing an offer as if the fixture price is the real price.

First-time flippers analyze a fix and flip like a spreadsheet exercise: purchase price, generic rehab number per square foot, sale price, done. Experienced flippers analyze it like a construction project, because that's what it is. The spreadsheet matters, and the ARV page covers how to build the resale number properly. But ARV math is only as good as the scope of work underneath it, and the scope is only as good as your honesty on the walkthrough.

Will the finished house sell on that street?

A flip is only as good as its exit, so before you offer, confirm the street has buyers at your finished price. Say you're looking at a house you'd renovate to sell at $260,000. You want real answers to all of these: have renovated houses within a few blocks closed near $260,000 in the last six months? How many days did they sit? Did they sell to owner-occupants with normal financing? Is $260,000 near the top of what the street has ever produced?

That last one matters more than people think. If the best sale the street has ever seen is $230,000, your $260,000 exit isn't a plan, it's a hope, and the appraiser won't share it. The strongest flips sell into the middle of a street's proven range, not above its ceiling.

The 15-minute screening checklist

Run every candidate through this table before you spend real time on it. Green lights earn a full underwrite. Anything in the right column either kills the deal or demands a priced answer before you go further.

When should you walk away?

Walk away the moment the deal needs a story to work. That's the discipline in one line. If you catch yourself saying "as long as the foundation guy says it's minor" or "if I can get the appraiser to see it my way" or "the neighborhood is turning around," you are narrating, and narration is what a bad deal sounds like from the inside.

The math version: a flip should work with your honest scope number, your conservative resale number, and margin left over for the surprise you haven't found yet. If it only works with the optimistic version of all three, it doesn't work. There is no prize for buying a house. Walking away is cheap. Closing on the wrong house is not.

A house came to me out west, nice neighborhood, ARV around $525,000. I ran it, and my calculator said I could pay $280,000 and clear about $63,000. The wholesaler wanted $330,000. At $330,000 with borrowed money the deal simply does not fit, so I passed, and it stung, because it was a beautiful house that becomes a real deal the second you strip out the wholesaler spread and the cost of capital. I would walk again every time. The asking price is not a price, it is an opening number, and the calculator tells you what you can actually pay. Forcing a house you already know is fifty thousand too expensive is exactly how a beginner turns a first deal into a first loss.

Where this goes wrong

The screening failures I see repeat themselves, so here's the list to check yourself against:

• Falling in love on the walkthrough. You start decorating in your head and stop inspecting. The house becomes "mine" before the numbers say it should.
• Letting the discount do the underwriting. "It's $40,000 under market" is not analysis. Under market for a reason is the default assumption until you find the reason.
• Pricing the rehab by vibes. A per-square-foot guess is fine for sorting candidates. Offers get a written scope.
• Ignoring the exit ceiling. Renovating a house past what its street can appraise for. The work is beautiful and the profit isn't there.
• Treating structural as a dealbreaker instead of a discount. Some of the best margins hide behind problems that look expensive and fix cheap, and vice versa. Renting that judgment from a contractor before you offer costs almost nothing.
• Screening one house at a time forever. If every candidate fails the screen, the problem isn't the houses. Your buy box or your sourcing needs the fix, not your walkthrough technique.

Here's the thing the checklist teaches you after a few dozen reps: your criteria stop being about individual houses and start describing a place. A price range, an age of housing stock, a kind of street, a type of seller. Once you can describe the house you want that precisely, you don't have to wait for one to show up on a list. That description is a target, and Homebase is built to work it: you give it one address that fits your criteria, and it turns the neighborhood around that address into a mailed, tracked seller-acquisition campaign, so the next candidate calls you.