What to Disclose When Selling a House You Renovated Yourself

You spent two summers retiling the bathroom, moved a wall between the kitchen and dining room, and rewired the laundry with a friend who "knows what he is doing". Now the house is going on the market, and the agent has handed you a disclosure form with a question you were hoping to skip: was any work done without the required permits?

This is the point where a lot of DIY renovators panic, either by hiding everything or by confessing so much that buyers walk. I have sold two houses I renovated myself, and the third one I sold at a loss, partly because of a disclosure conversation I handled badly. What follows is the order I would work through now, and the reasoning behind it.

Why owner work gets treated differently at sale

A buyer's inspector can see that a wall is gone. What they cannot see is whether someone checked the beam that replaced it. Work done by a licensed trade usually leaves a paper trail: a permit number, a final inspection, a compliance certificate for electrical or plumbing. Owner work often leaves nothing, so the buyer has to price in the unknown.

That gap is what the disclosure rules are trying to close. The details change by state and country, but the pattern is similar almost everywhere. California's Transfer Disclosure Statement asks directly about room additions, structural modifications and alterations "made without necessary permits". In Victoria, Australia, an owner builder who sells within six and a half years of finishing work above a set value has to supply a defects report and, in many cases, domestic building insurance. Plenty of other places rely on a general duty not to conceal known defects rather than a specific form.

I cannot tell you which rule applies to your house. Your conveyancer or attorney can, usually in a single short call, and that call is cheaper than any of the alternatives below.

What usually has to go on the form

From my own sales and from talking with agents, these are the items that come up most often when the owner did the work:

• Structural changes. Removed or moved walls, new openings, enlarged windows, decks attached to the house. These carry the most weight because the risk is real.
• Electrical and gas work. In many jurisdictions this has to be done or signed off by a licensed person no matter who owns the house. If yours was not, it is a disclosure item and probably a fix item as well.
• Plumbing that moved. Swapping a tap is maintenance. Moving a toilet or adding a shower usually is not.
• Known problems you fixed. A leak you repaired, a termite treatment, a cracked slab you patched. Many forms ask about past issues, not only current ones.
• Anything you started and did not finish. A half tiled splashback is obvious. A missing waterproofing membrane under finished tiles is not, and that one matters.

Cosmetic work, such as painting, new flooring laid over a sound subfloor, cabinet fronts or a new vanity on existing plumbing, rarely needs any mention. Buyers can see it and judge it themselves.

The advice I would ignore: say as little as possible

Every renovator hears this from someone at a barbecue. The logic seems sensible: anything you write down gives the buyer a reason to haggle.

It goes wrong in two ways. First, the buyer's building inspector will often find the work anyway. A fresh wall of plasterboard in a 1960s house, a newer switchboard with no certificate, a deck with joist hangers that look too new. When that comes up after you have answered "no" on the form, the conversation stops being about price and starts being about trust. On my third house, the buyer's inspector found a bathroom I had redone without a waterproofing certificate. I had not ticked the box because I honestly forgot the certificate was a thing. It still cost me roughly a month of delay and a price reduction bigger than the cost of getting it certified.

Second, in many places a false or incomplete answer is what gives the buyer a legal claim after settlement. A disclosed problem is something they accepted. A hidden one is something they can come back for.

Disclosure moves the argument from "you hid this" to "how much is this worth", and the second argument is one you can usually win.

Fix, certify, or disclose: deciding item by item

You do not have to treat every piece of owner work the same way. I sort each item into one of three piles before the agent takes photos.

Fix it

Anything unsafe goes here, full stop. Unpermitted wiring, a gas fitting you did yourself, a balustrade below the required height. Paying a licensed tradesperson to inspect, correct and certify is usually a few hundred to a couple of thousand dollars depending on the job, and it takes the item off the table entirely.

Certify it after the fact

Some councils and building departments allow a retrospective approval, sometimes called a building certificate, an as built permit or legalising work. It is slower, often six to twelve weeks, and the inspector may ask you to open a wall. If your sale date is flexible, this is the option that does the most for the price, because a certificate turns an unknown into a known.

Disclose it plainly

Low risk owner work that would cost more to certify than it affects the price can simply go on the form, described in one or two factual sentences. "Kitchen wall between kitchen and dining removed by owner in 2021, beam sized by a structural engineer, engineer's letter attached, no council permit obtained." That sentence reads very differently from a bare tick in a box.

Paperwork that makes buyers relax

The single most useful thing I did on the two profitable houses was keep a folder from day one. It held receipts for materials, product data sheets for the waterproofing and adhesives, photos of the framing before the plasterboard went on, and any letters from engineers or trades. Buyers and their inspectors respond to evidence far better than to reassurance.

If you did not keep that folder, you can rebuild some of it. Your hardware store account may hold purchase history. Your phone almost certainly has photos you took to show friends. A structural engineer can inspect a removed wall now and write a short letter for a modest fee. None of this replaces a permit, but it changes how a buyer reads the disclosure.

It also helps to think about what you spent against what the buyer will credit. I wrote separately about not over capitalising on a renovation, and the same logic applies here: a certificate that costs eight hundred dollars and protects a twenty thousand dollar kitchen is an easy call, while certifying a garden shed rarely is. For the pre-listing repairs that are not about owner work at all, the list in what to fix before listing a home covers the rest.

How buyers' inspectors spot DIY work

Knowing what they look for helps you decide what to deal with first. Inspectors commonly flag a switchboard newer than the wiring it feeds, power points at odd heights, silicone where grout should be, uneven tile lines near a shower, cornices that change profile halfway along a room, and floor levels that shift where a wall used to stand. If two or three of those are true of your house, assume the inspector will notice. The items in the building inspection items that actually matter overlap heavily with this list, seen from the buyer's side.

One thing to do this week

Walk through the house with a notepad and write down every piece of work you did yourself since you bought it, with the year and whether a licensed person touched it. Then book a thirty minute call with your conveyancer or attorney and go through that list line by line. Bring it to the agent only after that call, so the disclosure form gets written from facts you have already sorted rather than from memory under pressure.