The ROI of Fixing Deferred Maintenance Before You Sell in Silicon Valley

Almost every listing appointment I go on with a longtime homeowner in Silicon Valley gets to the same moment. We’re standing in a kitchen the family has cooked in for thirty or forty years, and someone asks me, a little nervously, whether they need to fix everything first: the roof that’s “got a few more years in it,” the carpet from 2003, the cracked window in the back bedroom nobody has thought about since the grandkids were small. The truth is, there’s no one right answer and it changes from house to house, market to market, and owner to owner.

That can sound like a shrug, so I want to give you something more useful. There’s good research on how deferred maintenance affects what a house sells for, and a surprising amount of it focuses on older homeowners specifically. I’ll walk you through what it found, how buyers here actually price a house that needs work, and the simple way I help families decide which repairs are worth the money and which ones the next owner can handle.

What Deferred Maintenance Really Means When You Sell

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Deferred maintenance is everything a house needed that it didn’t get: the 26-year-old roof, gutters full of oak leaves, peeling trim on the south side, the slow leak under the bathroom sink, windows that should have been changed twenty years ago, and carpet worn down to a path between the recliner and the kitchen. None of it happens in a single year. It builds up over a decade or two while people are busy raising kids, caring for a spouse, or simply getting older in a house that’s getting older right along with them.

Here’s why it matters at sale time. Buyers don’t price deferred maintenance at what it costs to fix. They price it at the cost plus the hassle, plus the risk of what they can’t see, plus a cushion because they’re nervous, which is how a $25,000 roof repair turns into $40,000 off the list price. Tired floors and dark walls make the listing photos look worn, so fewer people come through on the weekend. And some items, like exposed subfloor, missing drywall, or a failed septic system can keep a lender from making the loan at all, which leaves you with cash buyers who know exactly how much leverage they have.

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What the Research Says About Deferred Maintenance and Resale Value

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I’ve written before about the proof that major pre-sale renovations rarely pay off, and I talk about it all the time. What gets less attention is the other side of the ledger, meaning what happens to value when the maintenance on a house isn’t kept up. And a lot of that research looks specifically at older homeowners, the people I spend many of my days with.

Older homeowners lose appreciation, and maintenance is part of why

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Economist Thomas Davidoff’s study “Maintenance and the Home Equity of the Elderly”, from UC Berkeley’s Haas School of Business, found that U.S. homeowners over 75 spend about $1,100 less per year on upkeep and improvements than younger owners of similar homes, and their homes appreciated roughly 3% per year less in the same markets. The value lost was so much larger than the money saved that, in his view, plenty of older owners were skipping projects that would have paid for themselves.

A 2007 study published in HUD’s Cityscape journal came in more conservatively but pointed the same way, estimating $25,000 to $35,000 in lost value on a “typical” American home over twenty years. Of course, homes in Silicon Valley are atypically expensive, about 4.5 times more so than the average American home – so we might expect that number to be $125,000-$150,000 in our market for, say, an older, average ranch style home in Cambrian.

The newest study adds an important twist

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The most recent and most rigorous work is “Aging and Housing Returns”, a National Bureau of Economic Research working paper summarized by Boston College’s Center for Retirement Research in January 2026. Using actual sale prices rather than owners’ estimates, they found an 80-year-old seller earns about 0.5% per year less than a 45-year-old, or roughly 5% less over a typical 11-year hold. CNBC covered it with the headline that the gap starts around age 70.

What surprised me in that report are the reasons they found. Poor condition explained only about 10% of that gap, while about half came from how the homes were sold. Older sellers were more likely to sell off the MLS and more likely to sell to investors, and those sales produced meaningfully lower returns. When Illinois changed its MLS rules to cut down on private listings, the age penalty was cut in half. Condition matters, but the bigger leak is taking a quiet cash offer instead of putting the house in front of the whole market.

The repairs that pay back are mostly maintenance

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A paper in the Journal of Urban Economics estimated that housing depreciates around 2.5% a year without maintenance, with outdoor upkeep having an outsized effect. That matches what I see, since roofs, paint and windows are the first things buyers notice and discount, and it lines up with the sales data further down showing that buyers penalize neglect far more than they reward upgrades.

One caveat worth keeping in mind. These studies measure upkeep over years of ownership, not a burst of repairs the month before listing, so “take care of your house over time” is better supported than “fix everything before you sell.” That’s why pre-sale repairs call for judgment rather than a blanket rule.

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When Fixing Deferred Maintenance Before Selling Really Pays Off

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The repairs that earn their money back tend to have one thing in common. They change who can buy the house or how buyers feel when they walk in, and they usually fall into three buckets.

Repairs that make the home financeable

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This is the biggest lever by far. Bare subfloor, a failed septic system, evidence of a roof leak, visible mold, or safety issues a lender will flag can shut out every buyer who needs a loan, leaving you with investors who price in the work plus their profit – and they’re looking to make at least 10% on every dollar they put into a project, but better 15%. So if your home has a condition issue which would necessitate a cash offer, know that if you don’t take care of it, you’re looking at a 10-15% loss off retail price right there.

Cosmetic work that changes the photos

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Paint over dark or dated walls, install new carpet or luxury vinyl plank over worn floors, give it a real cleanout and a solid weekend or two of yard work. This is what shows up in the listing photos and the first ten seconds of a showing, and it’s what separates a house buyers see as “needs work” from one they see as cared for. I’ll put numbers on that difference below. I’m not talking about new counters or a lighting package, just making the house look loved and cared for.

Small fixes that keep the inspection report clean

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A leaking supply line, a running toilet, torn vent screen, a cracked pane or a missing handrail costs a few hundred dollars to fix and a few thousand to leave alone, because every line item gives a buyer a sense that the house is run down, and more reason to renegotiate. And remember, Prospect Theory teaches us that people feel a loss about twice as strongly as an equal gain (Kahneman and Tversky put it at roughly 2.25 times) – so these little turn-offs will end up turning away a significant chunk of the buying public, giving those who are interested in your home more room to negotiate.

Timing matters too. Repairs make the most sense when you have at least four to six weeks before listing, someone to manage the contractors (that would be me, ahem!), and a way to pay for the work. Programs like Compass Concierge mean a family may not need cash on hand to get the house ready.

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What ROI Can You Actually Expect From Fixing Deferred Maintenance?

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I want to be careful here, because most of the “ROI” numbers you see quoted for home projects come from asking real estate agents to guess. The 147% return for refinished hardwood floors that gets passed around comes from NAR’s Remodeling Impact Report, and the Cost vs. Value report builds its resale numbers from a survey of more than 6,000 REALTORS®. Agents tend to repeat what other agents say, so I would rather look at what buyers actually paid. Everything below comes from studies of closed sales, and I’ll use a $2 million Silicon Valley home to turn the percentages into dollars.

Making the home financeable: often five to ten times what it costs

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This is where the math is most lopsided. Fannie Mae’s guidelines don’t allow a loan on a home rated C6 on the appraisal, its lowest condition rating, and anything affecting safety, soundness or structural integrity has to be repaired before the loan can be delivered. Once a house can’t be financed, cash becomes the only way out, and cash costs you. In a 2024 study in the Journal of Finance, researches from UC San Diego found that all-cash buyers pay about 10% less than mortgage buyers for comparable homes, about 11% in county records covering two million sales and 8% in Redfin offer data. On a $2 million home, that’s roughly $200,000.

If the cash buyer is a high-volume flipper, the gap gets much wider. Research in the Review of Financial Studies, using decades of Los Angeles sales, found that the most active flippers bought at roughly 30% below market value, and most of their profit came from that purchase discount rather than from the work they did. So if, say, $20,000 to $40,000 of repairs brings mortgage buyers back into the picture, you’re spending one dollar to protect somewhere between five and ten.

Getting out of the “needs work” category: about 8% of your price

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Buyers punish neglect harder than they reward upgrades, and the sales data shows it plainly. Zillow analyzed 2 million listings from 2024 and compared what each home sold for against what it was expected to sell for. Homes described as needing work or TLC sold for about 8% less, and fixer-uppers sold 7.3% below comparable homes, the biggest markdown in three years. Fully remodeled homes, on the other hand, earned only a 3.7% premium, and that was the highest of all 359 listing keywords Zillow measured. A peer-reviewed study of 10,350 sales in Oslo, published in the Journal of Real Estate Finance and Economics, found the same imbalance: a 9 to 10% discount for poorly maintained homes against a 5 to 7% premium for fully renovated ones.

On a $2 million house, that’s roughly $160,000 to $200,000 lost to “needs work,” compared with $74,000 to $140,000 gained from a full remodel that would cost far more than that to do. That’s the whole case for fixing deferred maintenance and skipping the renovation. Paint, flooring, a cleanout and yard work are usually what moves a house from “tired” to “cared for,” and they cost a fraction of the discount they remove. I dug into the condition research in more detail in another article I wrote: The Impact of Property Condition on Sale Price and Time on Market.

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Curb appeal: up to 7% of the sale price

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A 2020 study in the Journal of Real Estate Finance and Economics used Google Street View images and machine learning to score curb appeal, then matched those scores to actual sales. The curb appeal of a home and its neighbors together accounted for up to 7% of the sale price, with the home’s own curb appeal worth about twice as much as the neighbors’, and the premium grew stronger in down markets. Trimmed shrubs, fresh paint on the trim, gutters that aren’t sagging and a front door that doesn’t look tired are cheap, and they show up in the first photo every buyer sees.

Major systems: roughly break-even, and less in a hot market

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For roofs, sewer laterals and other big-ticket systems, I haven’t found transaction research showing a reliable profit from replacing them right before a sale, and the research on market conditions points the other way. Miller, Sah and Sklarz studied about 322,000 sales across more than 1,300 U.S. counties and found that price differences tied to condition shrink when the market is strong, and the Oslo study found renovation premiums fall sharply in heated markets. In a typical Silicon Valley spring, buyers are competing for the house and the location, not the roof, which is why a bid in the disclosure package usually does the job.

The numbers at a glance

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• Repairs that make the home financeable: protect against a cash discount of about 8 to 11% (roughly $160,000 to $220,000 on a $2 million home), often five to ten times what the work costs.
• Cosmetic deferred maintenance (paint, floors, cleanout, yard): removes a “needs work” discount of about 7 to 10%, and can return several times its cost when it changes how the house reads to buyers.
• Curb appeal: up to 7% of the sale price, counting the neighbors.
• Full remodel: a premium of roughly 4 to 7%, which is usually less than the remodel costs.
• Major systems: about break-even at best, and less in a hot market, so disclose with a bid.
• Selling off-MLS or to an investor: about 1% a year lower returns for older sellers in the Boston College research, which on a long hold dwarfs most repair decisions.

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When It Doesn’t Make Sense to Fix Deferred Maintenance

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I talk families out of far more repair projects than I talk them into. Here’s when I suggest leaving the work for the next owner.

When the buyer is going to tear it out anyway

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In much of Silicon Valley the land is most of the value, and if the likely buyer is a builder or a family planning a full remodel, a new roof or kitchen just ends up in a dumpster. Many (most?) Silicon Valley buyers will spend well into the six figures customizing the home to suit their taste and needs regardless of the current age, state or style of the home’s surfaces.

When the repair is big, specialized and easy to price

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Roofs, sewer laterals, retaining walls and septic systems are expensive and slow, and buyers are comfortable pricing them when they have real numbers (so long as it’s not going to affect their ability to get a mortgage on the home). Often the smarter move is an inspection and a contractor’s bid in the disclosure package. A bid in the file can be worth more than the repair, because it takes the fear and guesswork out of the conversation.

When time, energy or family dynamics won’t support a project

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A seller who has already moved out of state, a parent who just moved into assisted living, or heirs who live in different places and don’t always agree can turn a six-week project into months of stress. At the end of the day, all the pre-sale preparation you do is unlikely to add a life-changing amount of money to the bottom line.  My advice is always just to do the best you can with the time and resources available.  And in these cases, just remember to price it extra low to really grab attention in the marketplace, and let the unseen hand of the market do its work.  Lower prices attract more offers, and more offers means higher prices – which is actually a central tenet of my Demand Maximization Strategy.

When the market will absorb the condition

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In a tight market with strong demand, (as is often the case here in Silicon Valley) buyers will often accept a house that needs work as long as it’s disclosed and priced honestly, and over-preparing just eats into your net.

What I never recommend is the path most people drift into by default, doing nothing and then taking the first cash offer that shows up. Remember that half of the age penalty in the Boston College research came from off-market and investor sales. Selling as-is can be the right call, but selling as-is on the open market with full disclosure is a very different outcome from selling to the first investor who sends you a letter.

How I Decide What to Fix Before You Sell

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When I walk a house with a family, this is the order I work through before recommending anyone spend a dollar.

1. Get the facts before the market does. A pre-listing home inspection, termite report, sewer lateral, roof inspection, and the county or city permit history, because surprises in escrow cost far more than surprises in week one.
2. Sort every item into fix, disclose or ignore. Fix what blocks financing, what’s cheap and would clutter the inspection report, and what changes the photos. Disclose big, specialized items with a bid, and ignore what the likely buyer will remove anyway.
3. Fit the plan to the family, not just the house. Who’s making decisions, how far away they live, how much time they have and how much disruption they can handle shape the answer as much as the roof does.
4. Fund it without out-of-pocket cash. Concierge programs and pre-marketing agreements let the work be paid from escrow at closing.

If a repair won’t change who can buy the house, what the photos look like, or what ends up on the inspection report, it probably isn’t worth doing before you sell.

Every house tells a story about the people who lived in it, and every family has its own mix of timing, emotions and priorities. If you or your parents are thinking about selling a longtime home and aren’t sure what’s worth fixing, I’d be glad to walk through it with you. We’ll look at the as-is value, the prepared value and what makes the most sense for your family before anyone spends a dime.

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Sources

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• Davidoff, T. Maintenance and the Home Equity of the Elderly. UC Berkeley Haas School of Business, SSRN.
• Rodda, D. and Patrabansh, S. (2007). Homeowner Age and House Price Appreciation. Cityscape, U.S. Department of Housing and Urban Development.
• Amornsiripanitch, N., Strahan, P. and Zhang, S. Aging and Housing Returns. NBER Working Paper 34656.
• Center for Retirement Research at Boston College (2026). Why Do Older People Get Lower Returns on Their Homes?
• CNBC (2026). Home sellers start getting lower prices at 70, research shows.
• Harding, J., Rosenthal, S. and Sirmans, C.F. Depreciation of Housing Capital, Maintenance, and House Price Inflation. Journal of Urban Economics.
• National Association of REALTORS® (2022). Remodeling Impact Report.
• Zonda and Journal of Light Construction. Cost vs. Value Report Methodology.
• Fannie Mae. Selling Guide B4-1.3-06: Property Condition and Quality of Construction of the Improvements.
• Reher, M. and Valkanov, R. (2024). The Mortgage-Cash Premium Puzzle. The Journal of Finance, 79(5).
• Bayer, P., Geissler, C., Mangum, K. and Roberts, J. (2020). Speculators and Middlemen: The Strategy and Performance of Investors in the Housing Market. The Review of Financial Studies, 33(11).
• Zillow (2025). The End of the Fixer-Upper: Remodeled Homes Sell for the Highest Premiums.
• Mamre, M. and Sommervoll, D. (2022). Coming of Age: Renovation Premiums in Housing Markets. The Journal of Real Estate Finance and Economics.
• Johnson, E., Tidwell, A. and Villupuram, S. (2020). Valuing Curb Appeal. The Journal of Real Estate Finance and Economics.
• Miller, N., Sah, V. and Sklarz, M. (2018). Estimating Property Condition Effect on Residential Property Value: Evidence from U.S. Home Sales Data. Journal of Real Estate Research, 40(2).
• Tversky, A. and Kahneman, D. (1992). Advances in Prospect Theory: Cumulative Representation of Uncertainty. Journal of Risk and Uncertainty, 5(4).

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