Selling an old house takes more preparation than selling a newer one because the systems inside it are near the end of their useful life, the materials used to build it may be regulated, and federal law adds disclosure duties that only apply to homes built before 1978. Get the pre-listing inspection, the disclosures, and the pricing right, and the rest of the transaction tends to follow. Skip those steps, and problems surface during the buyer’s inspection, when your leverage is gone.
Start With a Pre-Listing Inspection
A professional inspection before you list is more revealing on an older home than you probably expect, and the point is to find the problems before a buyer does. Inspectors concentrate on the systems most likely to have degraded over decades: electrical wiring, plumbing, foundation, and roof.
Knob-and-tube wiring, common in homes built before the 1950s, is the single biggest flashpoint. It has no ground wire, its insulation degrades over time, and many insurers will cancel or refuse to issue a homeowners policy when it’s present. Replacement typically runs $12,000 to $36,600 depending on the home’s size. Finding that out after you’ve accepted an offer can collapse the deal.
Plumbing in older homes often means galvanized steel pipes, which corrode from the inside and eventually restrict flow or fail. Sewer lines are a second weak spot: mature trees push roots into aging clay or cast-iron pipes, and a sewer scope camera will catch the blockages. Inspectors also look for foundation settling, deteriorated mortar in brick or stone, and roof coverings with only a few years left.
Materials matter too. Federal workplace safety rules treat vinyl and asphalt flooring installed before 1980 as presumed to contain asbestos unless testing proves otherwise, and the same assumption covers pipe insulation and certain ceiling tiles.1Occupational Safety and Health Administration. 29 CFR 1926.1101 – Asbestos Intact, undisturbed asbestos is generally manageable, but a buyer who plans to renovate is looking at thousands in abatement costs.
Price the House Against Its Actual Condition
Condition is the single biggest variable in pricing an older home. A house with cosmetic wear but solid bones might sell for 5 to 10 percent less than a comparable renovated property. One that needs a new roof, foundation work, or a full electrical overhaul can trade 20 to 30 percent below what a turnkey version would bring. Overpricing a house that visibly needs work leads to months on the market and price cuts that end up looking worse than listing honestly from the start.
Insurability is part of the price. If knob-and-tube wiring or a failing roof makes standard homeowners insurance hard to get, your buyer pool narrows to cash purchasers or buyers willing to upgrade before closing. Flagging those issues in your listing, along with an estimated repair cost, filters out buyers who would have walked during due diligence anyway.
Disclosures You Are Legally Required to Make
For every home built before 1978, federal law requires you to give the buyer the EPA’s lead hazard information pamphlet, disclose any known lead-based paint or lead-based paint hazards, share any inspection or risk assessment reports you have, and offer at least 10 days for the buyer’s own lead inspection before the purchase contract becomes binding.2Office of the Law Revision Counsel. 42 USC Ch. 63A – Residential Lead-Based Paint Hazard Reduction The buyer can waive the 10-day inspection window, but you have to offer it in writing.3U.S. Environmental Protection Agency. Sample Seller Disclosure Form for Lead-Based Paint
The penalty for skipping lead disclosure is steep. As of 2025, the inflation-adjusted civil penalty is $22,263 per violation, and a buyer who shows you knowingly concealed a hazard can sue for triple their actual damages.4Federal Register. Civil Monetary Penalty Inflation Adjustment This is one of the most commonly enforced disclosure rules in residential real estate.
Radon, Underground Tanks, and State Disclosure Forms
The EPA recommends remediation for any home at or above 4 picocuries per liter of radon and suggests owners consider mitigation between 2 and 4 pCi/L.5U.S. Environmental Protection Agency. What is EPA’s Action Level for Radon and What Does it Mean If a prior radon test was performed on the property, most state disclosure forms require you to report the results.
Underground storage tanks, once common for heating oil, carry their own layer of risk. An EPA study of leaking tank sites found average total cleanup costs between roughly $212,000 and $300,000, with soil excavation alone averaging close to $100,000 at some sites.6U.S. Environmental Protection Agency. Leaking Underground Storage Tank Cleanup Cost Study A decommissioned tank that was never properly removed can create liability for the new owner, so disclose the tank’s existence, condition, and any environmental testing you have on file.
Nearly every state also mandates its own seller disclosure form covering known defects, past flooding, foundation problems, and sometimes neighborhood nuisances. Cross-reference your records with municipal permit files before you fill one out. An unpermitted addition that surfaces in the buyer’s title search can kill the deal or leave you exposed to a claim after closing.
Pick a Sales Path That Fits the House
Three paths are realistic for an older home, and the right one depends on condition, timeline, and how much work you want to do up front.
An as-is sale to a cash investor or flipper is the fastest exit, often closing in two to three weeks with no pre-sale repairs and no financing contingency. The price is the trade-off. As-is sales to investors typically bring 5 to 20 percent less than market value when the issues are mostly cosmetic, and 20 to 30 percent less when major systems need replacement. iBuyer convenience and repair fees can run 7 to 18 percent of the sale price on top of that.
Listing with a real estate agent puts the house in front of owner-occupants, who are the buyers most likely to pay a premium for original hardwood, stained glass, and period architecture. The commission structure shifted after the August 2024 NAR settlement took effect: offers of buyer-agent compensation are no longer posted on the MLS, and sellers aren’t required to pay the buyer’s agent. Many sellers still offer some buyer-agent compensation to draw offers, but the rate is now negotiable rather than a fixed 5 to 6 percent split. Budget separately for your listing agent (commonly 2.5 to 3 percent) and for whatever you decide to offer the buyer’s side.
Selling by owner saves the listing commission but puts all the marketing, negotiation, and paperwork on you. On an older house, that is riskier than on a newer one, because a mistake on the lead paint form or state disclosure form creates personal liability. If you go that route, hire a real estate attorney to review the contract and your disclosures.
Taxes When You’ve Owned the House a Long Time
Decades of ownership can either hand you a tax-free gain or a surprise bill. Three rules decide which.
The Primary Residence Exclusion
If you owned and used the home as your primary residence for at least two of the five years before the sale, you can exclude up to $250,000 of capital gain from federal income tax. Married couples filing jointly can exclude up to $500,000, provided both spouses meet the use requirement and at least one meets the ownership requirement.7Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain from Sale of Principal Residence The exclusion can only be used once every two years.8Internal Revenue Service. Publication 523 – Selling Your Home
Basis and Capital Improvements
Your taxable gain is the sale price minus your adjusted basis, which is roughly what you paid plus the cost of capital improvements over the years.9Internal Revenue Service. Property Basis, Sale of Home – IRS FAQ On a house you’ve owned for decades, those improvements can swing the whole calculation. A kitchen renovation, a new roof, an addition, a furnace replacement all raise your basis and shrink your taxable gain. Routine repairs and maintenance do not count. Keep the receipts; the IRS can ask for documentation.
Consider a couple who bought in 1985 for $85,000 and spent $60,000 on capital improvements. Their adjusted basis is $145,000. If they sell for $550,000, the gain is $405,000, which falls under the $500,000 joint exclusion. They owe zero federal capital gains tax. Without the documented improvements, the gain would have been $465,000: still under the ceiling, but with much less margin.
Rates on Gain Above the Exclusion
Anything above the exclusion is taxed at long-term capital gains rates. For tax year 2026, single filers with taxable income up to $49,450 pay 0 percent on long-term gains. The 15 percent rate applies to income between roughly $49,450 and $545,500 for single filers, and between $98,900 and $613,700 for married couples filing jointly. Above those thresholds the rate is 20 percent. High earners may also owe the 3.8 percent net investment income tax on top.
Inherited Houses and Stepped-Up Basis
If you inherited the property, the math changes. The basis of inherited property resets to its fair market value on the date of the prior owner’s death.10Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired from a Decedent A house bought for $30,000 in 1965 that was worth $350,000 on the date of death gives the heir a basis of $350,000. Sell for $370,000 and the taxable gain is $20,000, not $340,000. Decades of appreciation drop out of the calculation.
Selling an inherited home during probate adds procedure. The executor may need court permission to list unless the will grants independent administration authority, beneficiaries with an interest in the property generally have to be notified, and some jurisdictions require probate court approval of the final sale price. Talk to a probate attorney before listing.
Historic Designations and Preservation Easements
Listing on the National Register of Historic Places does not, by itself, restrict what you or a future owner can do with the property under federal law.11eCFR. Part 60 – National Register of Historic Places Restrictions come from local historic district ordinances, which many municipalities adopt independently. A house in a locally designated district may need design review approval before exterior changes, and certain features might have to stay intact.
A separate issue is a recorded preservation easement, which some prior owners granted in exchange for a charitable tax deduction of up to 50 percent of the donor’s adjusted gross income with a 15-year carryover.12Internal Revenue Service. Introduction to Conservation Easements – Statutory Requirements The easement binds every future owner in perpetuity. If one is recorded against your property, disclose it early. Buyers who find it in a title search tend to walk.
Inspection, Financing, and Closing
After an offer is accepted, due diligence and closing usually run 45 to 90 days. Two parts of that stretch generate the most friction on older houses.
The buyer’s inspection will cover much of the same ground your pre-listing inspection did, and findings often open a second round of negotiation. Repair credits are common: instead of fixing issues yourself, you reduce the sale price or fund an escrow account the buyer draws from after closing. Having your own inspection report in hand gives you leverage, because you can show the asking price already reflects what the inspector found.
FHA-insured buyers run into minimum property standards that trip up older homes regularly. The FHA appraiser must flag peeling paint on any home built before 1978, and the paint has to be stabilized before the loan can close. Structural deficiencies, inadequate drainage, termite damage, and water intrusion can all trigger required repairs.13HUD User. Minimum Property Standards for One- and Two-Family Dwellings If you won’t make those repairs, your buyer pool narrows to conventional or cash purchasers.
At closing, a settlement agent or attorney handles the deed transfer, distributes funds, and records the documents.14Consumer Financial Protection Bureau. What Can I Expect in the Mortgage Closing Process Seller closing costs, separate from agent commissions, typically run 1 to 3 percent of the sale price and cover title insurance, transfer taxes, recording fees, and prorated property taxes. Transfer tax rates range from zero in some states up to 3 percent in others. The buyer does a final walkthrough before closing day; once the deed is recorded and the lender funds, the settlement agent disburses your net proceeds.