Contractors · Disputes

How to prove the work was done: photo documentation for contractor disputes

When a customer says the work wasn't done, or wasn't done right, your photos answer for you. Take them before, during and after, from the same spot.

By Andre Gaz, developer of InspectCam™ · Published 18 October 2026 · Last updated 18 October 2026

Most disputes after a job come down to three claims. The work wasn't done. It wasn't done right. Or you caused damage that was already there. Each one is your word against theirs, weeks or months later, and nobody remembers the job as well as they think. You don't want to reconstruct job details from memory on the phone with an angry customer, or in front of a judge.

A clear photo, taken at the time, from a spot the other side recognizes, ends most of those arguments before they start. This guide is the routine: what to shoot, when, and how to keep it so you can find it again. It's written for contractors and trades, but a homeowner can use it the same way.

Why photo documentation settles contractor disputes

Most fights after a job are about what the place looked like on one day. A photo lets everyone go back and look. It shows the crack that was already in the tile, the valve set at the right depth before the wall closed, and the clean site you left on the last day.

Photos work best as part of a paper trail. The Federal Trade Commission's home improvement advice tells homeowners to keep notes and copies of letters and documents for their files. If the customer is told to keep a file, yours should be better.

How do you prove work was done?

Five habits do most of the work. None of them needs special gear, just the discipline to do them on every job, not only the ones that feel risky.

1. Shoot the “before” before you touch anything

Walk the work area when you arrive and photograph it as you found it. Get the thing you were hired to fix, and the things near it you weren't: the scuffed floor in the hall, the chipped counter edge, the cracked tile next to the toilet you're replacing. That's the photo that answers “your crew did this.” Shoot the path your crew will carry material along, too, and the driveway if a truck or dumpster goes on it.

2. Wide first, then close

A close-up of a fitting could be anywhere. Take a wide shot that shows the room or the wall, then step in for the detail. The wide shot proves where; the close-up proves what. Put something in the frame for scale on the close-up, like a tape measure or your hand.

3. Photograph hidden work before it's covered

Once the drywall, insulation, tile or concrete goes on, the work inside is gone from view. Building codes treat it the same way. Minnesota's building code rules, for example, say permitted work shall remain accessible and exposed for inspection until approved, and that work that fails shall not be covered or concealed until the building official says so. On commercial jobs that use the AIA A201 general conditions, work covered against the architect's request, or against what the contract requires, has to be uncovered at the contractor's expense if the architect asks for it in writing (section 12.1.1).

Even where nobody asked to see it, your photo is the only look anyone will get without a demolition bill. Shoot every wall at rough-in, the blocking, the nail plates, the slope of the drain, the rebar before the pour. Shoot the inspection sticker or signed card next to the work.

4. Keep the date, time and place with each photo

Your phone saves the date and time inside every photo file, and the location too if the camera's location setting is on. That record is what lets you say “this was taken on the 4th, before the tile went up.” Don't throw it away by sending screenshots, or by passing the only copy through an app that strips it. A date and address printed on the picture itself make it easier to read at a glance. Either way, it's a record of when and where the photo was taken, as the phone reported it, not a certificate. A phone's clock can be set wrong. How a timestamp camera app helps is on a page of its own.

5. Send it while the job is fresh

Photos that sit on your phone help you. Photos the customer has already seen help more. Send a short report at the end of the job, or at each milestone on a long one: the before, the work, the after, and a line on what you did. If they had a problem, you hear it now, while you can still fix it, not as a reason the last payment didn't come. Get the customer to sign off on the finished work if you can.

What makes a before and after pair convincing?

Before and after photos for contractors only work if the viewer can tell it's the same place. A tight close-up of new tile next to a tight close-up of old tile proves nothing; it could be two different bathrooms. Treat the pair like a measurement, and repeat it the same way.

Add “during” photos between the two on any job that takes more than a day. The middle is where most arguments live: what was behind the wall, why the job grew, which part was rotten.

Change orders: photograph the reason first

When you open a wall and find rot, or a subfloor that won't hold tile, stop and photograph it before you quote the extra. The photo is why the price went up. Show it to the customer, write the change order, and get it signed before you do the work. Expect the customer to keep that change order and read it again later, so write it plainly.

How do courts look at photos?

This is general information, not legal advice. Rules differ by state and by court, and a lawyer in your state is the one to ask about a real case.

In general, a photo has to be shown to be what you say it is. In federal court, Federal Rule of Evidence 901 asks for evidence “sufficient to support a finding that the item is what the proponent claims it is,” and one way is the testimony of someone who knows. In practice, that's often a person who was there saying the photo fairly shows the scene. Most states have similar rules. So the best photo is one you took yourself, can explain, and can place in time.

Copies count too, up to a point. Rule 1003 lets a duplicate in to the same extent as the original, unless there's a genuine question about the original's authenticity or it would be unfair. That's one more reason to keep the original files: if someone says a photo was changed, you can produce the one the camera made.

Most contractor disputes never get near a federal court. They end in a phone call, a licensing board complaint, mediation or small claims. There, photos with dates matter even more, because nobody is there to explain them for you. The California courts' small claims self-help guide uses this very example: to show a home was left clean, you could bring photos with timestamps that show when they were taken. Bring printed copies to the hearing.

What your customer has been told to keep

Homeowners get advice too, and it shapes the dispute. The same FTC page tells them never to make the final payment until the work is done and they're satisfied with it, and, when there's a problem, to try to resolve it with the contractor first. That first call is where your photos do the most good.

So the last payment is where disputes land. A signed completion at the final walk-through, with the after photos attached, is your strongest answer. If the customer won't sign, your photos of the finished work, taken that day, are the next best thing. When the dispute involves an insurance claim, the adjuster asks for the same things: the Insurance Information Institute's claim steps include photographing or videotaping the damage before you make temporary repairs.

Keeping the photos so you can find them

A great photo you can't find is no help. The usual failure isn't a missing photo, it's photos stuck in text messages, mixed into a camera roll with five other jobs and the kids' birthday, and nobody can retrieve the right image weeks or months later.

• One folder or album per job, named by address, the day you start.
• Keep the originals. Text messages and some chat apps shrink photos and can drop the details stored in the file. Send originals by email or a shared folder.
• Back them up somewhere other than the phone that took them.
• Keep them as long as you could be asked. Your warranty period is the least; how long a claim can be brought in your state may be longer. Ask your lawyer or your insurer.

The construction photo app page covers keeping a whole build in order, from the slab to the final walk-through.

Photos in dark places

The work people argue about is often where the light isn't: inside a wall, under a sink, in a crawl space or an attic. A dark, blurry photo is easy to dismiss. You need one hand on the phone and something to light the subject, and many phones turn the flashlight off when the camera opens.

InspectCam™ is free on Google Play (I build it). One tap and the light stays on while you look, take photos and record video.

• Tap to focus on the fitting, the joint or the crack.
• Pinch to zoom, or use the wide and close presets your phone supports, to read a label from where you stand.
• The timer (3 or 6 seconds) and the volume buttons take the shot when you're reaching into a cavity and can't see the screen.
• Touch lock keeps a sleeve or a knee from changing anything while you film.
• The level is there for a quick look at level and plumb: a rough check, not for code or safety.

The light turns off after 10 minutes untouched, with a warning first, or if the phone gets very hot; tap it to turn it back on. Free photos carry a small, faint InspectCam™ mark in one corner.

Pro, coming soon: the proof as a report

Doing all this by hand works, but it takes discipline at the end of a long day. InspectCam™ Pro is coming soon to do the filing for you, on your Android phone. None of this is in the free app on Google Play today.

• The right job, picked for you. With location allowed, the camera picks the job you're standing at. When several jobs are close by, it asks “Which job?” instead of guessing.
• The stamp. Every photo and video taken into a job carries the date, time, street address and GPS position the phone reports, in one thin line along the bottom. With location off, it's the date and time only. It's a record of when and where, not a certificate, and Dual videos, with both cameras at once, don't carry it.
• Before and after pages. Pick two photos in a job and they become a pair, the earlier one the Before. In the full report each pair gets a page of its own, the Before on top and the After below, at one size, each with its time, note and marks.
• Marks and voice notes. Draw numbered arrows and circles on a photo, with a line of words for each. Hold Talk to keep a voice note with the photo; the phone writes out the words where it can, and the report prints them. More in how to annotate construction photos.
• Signatures. A work authorization at the start and a certificate of completion at the end, each signed on the phone with a finger, in your company's wording, saved with the signer's name, date, time and time zone. Whether a phone signature suits your contracts is a question for your lawyer.
• Photos the customer sends you. Gallery photos can go into the job, marked “Added from phone gallery” in the report, with a reminder that they may have no time or location stamp.
• A PDF report under your name. One tap builds it with your company name, logo and license number, and a small “Generated with InspectCam” credit on the last page.

Pro comes in three plans, all coming soon: Duo for up to 2 people at $39.99 a month, Team for up to 5 at $89.99, and Business for up to 10 at $159.99. On Duo and Team, paying yearly gets you a year for the price of ten months; Business is monthly only. US prices, plus any tax, charged by Google Play. At launch, Pro is sold in the United States; the free app is available everywhere. On Team and Business, your subs can send photos of their part of the job into it from their phone's browser, by QR code or link, with no app. For now, each person on your crew needs an Android phone; the iPhone app is coming soon, with Pro included. The details are on the Pro page.

Questions people ask

How do you prove work was done?

Photograph the job before you start, during the work, and when it's finished, from the same spots, wide first and then close. Photograph hidden work before it's covered. Keep the original files with the date and time the phone saved, keep them together by job, and send the customer a report with a sign-off at the end.

Do photos hold up in a contractor dispute?

Often they're what settles it, but a photo has to be shown to be what you say it is. Under Federal Rule of Evidence 901, that usually means someone who was there says it fairly shows the scene, and most states work much the same way. Keep the originals and know when and where you took each one. This is general information, not legal advice.

What should before and after photos for contractors show?

The same place, from the same spot, at the same angle and zoom, with something that didn't change in both frames, like a window or an outlet. Light the subject, label each photo, and keep the date and time. Add during photos on any job longer than a day.

Should I photograph work before it's covered up?

Yes. Once drywall, insulation, tile or concrete goes on, the photo is the only look anyone gets without tearing it out. Building codes generally require permitted work to stay exposed until it's inspected, so photograph it with the inspection card or sticker next to it.

Do I need the customer to sign off on finished work?

It isn't always required, but it's the strongest record you can have. A signed completion at the final walk-through, with the after photos attached, shows the customer saw the work. If they won't sign, photos of the finished work taken that day are the next best thing. What a date stamp on those photos shows, and doesn't, is on our timestamp camera app page. This is general information, not legal advice.

Is a text message a good place to keep job photos?

No. Photos stuck in text messages are hard to find later, are often shrunk, and can lose the details stored in the file. Keep the originals in one folder per job, back them up, and send them by email or a shared folder when someone asks.

This page is general guidance, not legal advice; your contract, your state's law and the court or board hearing a dispute decide what counts. If something here didn't match your experience, tell us and it may help the next person.