Your House Records File and What Goes In It

Why this matters

Three moments in owning a house reward whoever kept the paperwork. A repair, where the first question is how old the equipment is and whether it is still under warranty. An insurance claim, where you have to show what you had and when it was installed. A sale, where the buyer's inspector asks how old the roof is and whether the basement finish was permitted. In each case the answer either exists in a folder you can hand over, or it gets reconstructed from guesses, and guesses tend to cost you.

A house records file is not a filing system. It is one index page and a place to put the papers behind it. This card shows the page, says what belongs on it, and walks through one case where it decided the outcome.

The one-page index

Everything else in the file is backup for this page. If you only ever keep one sheet up to date, keep this one.

HOUSE RECORDS INDEX            123 Example Lane
Updated: 2026-03-02            Built: 1994  Bought: 2019

EQUIPMENT
Item          Installed   Model / Serial      Warranty to
Water heater  2020-11-14  WH-50G / 2010xxxx   Tank 2026-11
Furnace       2019-06-03  FN-80K / 1904xxxx   Parts 2029-06
AC condenser  2019-06-03  AC-036 / 1903xxxx   Parts 2029-06
Roof          2017-08     shingle, 30 yr      Workmanship ?
Sump pump     2023-04-22  SP-1/3HP            1 yr, ended

PERMITS AND FINAL INSPECTIONS
2019  HVAC replacement   permit #____  final: passed
2020  Water heater       permit #____  final: passed
2022  Basement finish    permit #____  final: passed

SERVICE HISTORY           -> see Service log tab
PAINT      Living rm: maker, "Oat 214", eggshell
CONTRACTORS  Plumber / HVAC / Electrician / Roofer
             (name, phone, license no.)
WHERE THINGS ARE   shutoffs -> see photos tab

Three things make this page useful rather than decorative:

• Dates are full dates where you have them. "2020" is a guess with a margin of a year. "2020-11-14" is a date a warranty can be measured from.
• Model and serial are both there. The model says what the equipment is. The serial is what identifies your unit, and on many brands it also carries the manufacture date.
• The warranty column says what is covered and until when. "Tank 2026-11" is different from "parts 2029-06", and both are different from the installer's workmanship warranty, which is often much shorter and separate from the manufacturer's.

What goes behind each line

Equipment. The installer's invoice (it shows the install date and who did it), the manual, the warranty card or registration confirmation, and a phone photo of the rating label. See related: Reading the Label on Your Water Heater, and Reading the Labels on Your Furnace and Air Conditioner.

Permits and final inspections. The permit number, the date, and the final inspection result. A permit that was opened but never passed final is a loose end that a buyer's inspector or title search can find, so the final result matters more than the permit itself. If you do not have them, your city or county building department can usually look up permits by address. See related: What a Permit Means for You as the Homeowner.

Service history. One line per visit: date, company, what was done, what was found, what was recommended and not done. The "recommended and not done" column is the one people skip and the one that matters later, because it shows what you were told and when.

Improvements. Anything that added to the house rather than repaired it: a new roof, a finished basement, a deck, a replaced system. Keep the contracts and final invoices.

Paint and finishes. The product name, color name or code, and sheen for each room, plus flooring product and tile names. A touch-up five years later is much easier when you know exactly what is on the wall.

Contractors. Name, phone, license number, and which jobs they did. The license number lets you look them up again if you need to.

Photos. Each shutoff with enough of the room in frame to find it, each rating label, and a walk-through video of every room done once a year or so. The video is for an insurance claim: it shows what you had.

Paper, digital, or both

Either works. What fails is a mix with no index: some papers in a kitchen drawer, some photos on one phone, some emails in one inbox.

• Paper: a single binder or accordion folder, with the index page at the front. Easy to hand to a buyer or a tech.
• Digital: one folder with the index as a document at the top and subfolders matching the index headings. Scan paper as it arrives.
• Both: keep paper originals of anything with a signature or a warranty registration, and a digital copy of everything.

Keep at least one copy somewhere other than the house itself. A records file that burns or floods with the house is no help with the insurance claim about the fire or the flood. A cloud folder, or a copy with a relative, solves that.

Why it pays off: a warranty that hinged on one date

The water heater on the index above failed in July 2026 with a leak from the tank. Tank leaks on residential water heaters are often covered by the manufacturer's tank warranty, and this one carried a 6-year tank warranty. The question that decided the outcome was where those 6 years started.

The two possible start dates.

• Manufacture date, read from the serial number: March 2020. The heater sat in a warehouse and a supply house for several months before it was installed.
• Install date, from the plumber's invoice and the permit final: November 14, 2020.

Run each one forward six years.

• From manufacture: March 2020 plus 6 years is March 2026. The failure in July 2026 is about 4 months past that.
• From installation: November 14, 2020 plus 6 years is November 14, 2026. The failure in July 2026 is about 4 months inside it.

Why it mattered which one applied. Many manufacturers measure the warranty from the installation date when the owner can prove it, and fall back to the manufacture date when the owner cannot. The exact terms vary by manufacturer and are printed in the warranty itself, so read yours. In this case the homeowner pulled the invoice and the permit final out of the file, the plumber submitted them with the claim, and the tank was replaced under warranty. Labor and the other installation costs were not covered, which is common; the tank warranty covers the tank.

What would have happened without the file. The claim would have been judged on the manufacture date, about 4 months past the end, and the homeowner would have paid for the whole replacement. The same leak, the same heater, and the outcome turned entirely on whether one invoice could be found.

What would change it. Some manufacturers also require the unit to have been registered within a set window after installation to get the longer term, and a few honor only the manufacture date. If you registered online, keep the confirmation email in the file. See related: Warranty Registration and Proof of Installation.

The sale and the claim

At a sale. A buyer's inspector looks at the roof and estimates its age from its condition. A records file that says "installed August 2017, permit final passed" replaces an estimate with a fact. The same goes for a finished basement: a final inspection on file answers the question of whether it was done with a permit before anyone has to ask the building department. Records of improvements also matter for taxes when you sell, because the cost of improvements can be added to what you paid for the house when working out a gain; IRS Publication 523 explains how that works. This is not tax advice; ask your own tax preparer what to keep and for how long.

At a claim. An insurer asks what was damaged, how old it was, and what it was worth. A dated room video, the receipts for a replaced system, and a service log that shows the sump pump was tested in April are the difference between a quick settlement and a long back-and-forth.

At a repair. A technician who can see the install date, model and serial before arriving knows what parts to bring and whether to check warranty first. See related: How to Photograph and Record a Problem for Your Contractor.

Keeping it current without effort

You do not need a schedule. You need one habit: every time a contractor leaves, put the invoice in the file and update the index line. That takes two minutes while the details are fresh. Add new photos when you replace a piece of equipment. Once a year, at whatever time suits you, walk the house and redo the room video.

If you are starting from nothing in a house you already own, begin with the equipment lines. Read each rating label, photograph it, and use the serial to estimate age where there is no invoice. See related: Finding Out How Old Your Home Equipment Is. Then call the building department about permits on your address. That gets the most valuable half of the page filled in an afternoon.

How to check your file is complete

Hand the index to someone else in the house and ask them three questions. Where is the main water valve? How old is the water heater, and is it under warranty? Who did the last electrical work, and what is their license number? If they can answer all three from the page and the photos without asking you, the file is doing its job.

References

• IRS Publication 523, Selling Your Home, on the cost basis of a home and records of improvements
• Your equipment manufacturers' warranty documents, which set the start date and registration terms
• Your city or county building department, for permit and final inspection records by address
• See related: Warranty Registration and Proof of Installation
• See related: Your Home's Shutoffs: Water, Gas and Electric