Why San Diego Deals Fall Apart in the Last 10 Days

Most San Diego deals that collapse in the final ten days collapse for five reasons: a credit or debt change on the buyer’s side, an appraisal gap nobody planned for, an insurance surprise, an HOA or condo document problem, or a walkthrough dispute that turns into a renegotiation. Every one of those has an early warning sign, and almost every one of them is fixable if it surfaces in week one instead of the week you were supposed to sign.

I am writing this because the numbers moved. According to Redfin’s July 2026 contract cancellation report, 14.8% of San Diego home-purchase agreements that went under contract in July were canceled — up 0.7 points from June and 1.3 points from July 2025. Nationally the figure hit 14%, the highest share since November 2023. Nearly one in seven.

Who this is for

San Diego listing agents who have had a deal die at day 24 of a 30-day escrow, taken the seller’s phone call afterward, and then watched the relisted property sit while the market quietly reset the price for them. Also buyer’s agents who are tired of finding out about a problem the same week the loan was supposed to fund.

You already know how this feels. A fallout is not just a lost commission. It is thirty days off the market, a stale listing history that every subsequent buyer’s agent can see, a price reduction conversation you did not want to have, and a seller who is now quietly wondering whether you were the right choice. That last part is the expensive one.

The five late-stage deal killers in San Diego

1. The buyer’s credit or debt changed after the pre-approval letter

This is the most common one and the most preventable. A buyer finances patio furniture, co-signs for a sibling, opens a store card at the appliance showroom, or takes a new car payment because they figure the house is basically done. Debt-to-income is recalculated at the final credit refresh, not at the pre-approval letter, and a $700 monthly obligation can be the difference between a clean file and a dead one.

Earliest visible signal: nothing, unless someone asks. Which is why the ask has to be scheduled — at contract, at the two-week mark, and again before the final refresh.

2. The appraisal comes in under contract price

Rising inventory means more comparable sales, and more comparable sales means more of them are below your number. Run the math with a client and it stops being abstract. On a $950,000 contract with 20% down, the buyer’s loan is $760,000 and the principal-and-interest payment at the September 3 national average of 6.71% is roughly $4,909 a month.

Now the appraisal returns at $925,000. Financing is based on the lower of price or value, so an 80% loan becomes $740,000. The payment actually drops about $129 a month — but the buyer’s cash to close jumps from $190,000 to $210,000. A $25,000 valuation gap became a $20,000 cash problem, and cash is the thing buyers do not have lying around in September.

Sometimes the appraisal is simply wrong, and there is a formal process for that. I wrote the full playbook in Low Appraisal in San Diego: The ROV Playbook for Agents — rather than repeat it here, use it.

3. Insurance

This one has moved up the list fast in San Diego County, and it barely registered five years ago. A buyer in a high fire-hazard severity zone gets a quote that is multiples of what they budgeted, or cannot bind coverage in time to close. Because lenders require evidence of insurance before funding, an insurance problem is a closing problem, not a preference problem. Fire season peaks September through November, which is exactly when this shows up.

Earliest visible signal: the property’s fire zone designation, which you can look up the day you take the listing. If the answer is yes, tell the buyer’s agent to have their client start shopping coverage in the first week, not the third.

4. The HOA or condo documents

Reserve shortfalls, ongoing litigation, special assessments, high investor concentration, deferred structural repairs — any one of these can make a project ineligible for the financing the buyer is using, and the buyer’s agent usually finds out when the lender does, which is late. Condo and townhome financing rules tightened again in 2026; I covered the specifics in Buying a Condo in San Diego: What Changed in 2026 Condo Financing.

Earliest visible signal: order the HOA package immediately, and have the lender look at it the day it arrives rather than the day underwriting asks.

5. The final walkthrough

The dishwasher that was working in April is not working now. The seller took the mounted television and left the anchors. The agreed repairs were done, but done badly. Individually these are small. Two days before signing, with a buyer who has been anxious for a month, small becomes a reason.

Earliest visible signal: the repair receipts. Ask for them when the work is done, not when the buyer is standing in the kitchen.

The early-warning table

Deal killer	When it usually surfaces	When you could have seen it
Credit / new debt	Final credit refresh, days 20–28	Any scheduled check-in after contract
Appraisal gap	Days 12–20	Your own comp review before you accepted
Insurance / fire zone	Days 18–28, sometimes at funding	Day one — the fire zone is public record
HOA / condo project issue	Days 15–25	The day the HOA package arrived
Walkthrough dispute	Days 27–30	When the repair work was completed

One thing not to do

Do not solve this by writing tighter contracts. Shorter contingency periods and bigger deposits feel like control, and in a market with roughly 3.2 months of supply they mostly just cost you offers. Buyers have choices right now. The listings that hold their buyers are not the ones with the most aggressive terms — they are the ones where somebody was checking on the loan file every week.

I will also say the unpopular part plainly: some deals should fall apart. A buyer who is stretched to the edge and whose file only works if nothing changes for thirty days is not a deal you want to force across the line. Better it dies in week two, while your seller still has momentum and a market full of other buyers.

What to actually ask your lender

Three questions, at contract, every time:

1. What is not yet documented in this file? Not “are we good” — what specific items are still outstanding.
2. How much cushion is there? If the appraisal comes in 3% light, or the buyer’s debt goes up $500 a month, does the file still work?
3. When are you re-checking credit, and what will you tell me if something changed?

A lender who cannot answer those in one call is a risk on your listing. That is the whole point of having a lending partner rather than a phone number. My cash-buyer clients get the same treatment on the back end — the mechanics are in Delayed Financing in San Diego.

Frequently asked questions

Is 14.8% actually high, or does it just sound high?

Both. Redfin’s own data shows the national cancellation share has moved in a fairly narrow band of roughly 13% to 14% over the past four years, so July 2026 is a high within a range, not a cliff. What makes it matter locally is direction and inventory: San Diego is above the national figure, up year over year, and there are far fewer backup buyers waiting to catch a fallout than there were in 2021.

Can I stop a buyer from opening new credit during escrow?

Not contractually, in any way you would want to rely on. You can do something better, which is make sure someone tells them, in writing, in plain language, at contract — and then reminds them. Most buyers who blow up their own file did not know they could.

What is the single highest-leverage change for a listing agent?

A standing weekly loan-status call with the buyer’s lender, on the calendar at contract. Not a text asking whether everything is fine. An actual conversation about what is still outstanding. It takes ten minutes and it catches four of the five items above.

Where do rates sit right now?

The 30-year fixed averaged 6.71% and the 15-year averaged 6.04% in the Freddie Mac Primary Mortgage Market Survey dated September 3, 2026 — up from 6.66% the prior week, and 6.50% a year ago. Those are cited national averages, not quotes, and the survey updates every Thursday. Nobody knows where they go next, including the people who sound very confident about it.

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About the author. I am Ron Berg, mortgage broker and owner of The Berg Group, powered by C2 Financial Corp. I spend most of my week on files exactly like the ones above, and most of my referrals come from agents who got tired of surprises. More agent-facing breakdowns are on the blog, and you can always reach me directly through my calendar.

Ron Berg · NMLS #974839 · C2 Financial Corp, NMLS #135622 · Equal Housing Opportunity. All rates referenced are cited national averages published by Freddie Mac and are not an offer, quote, rate lock, or commitment to lend. Individual terms depend on credit, income, property, occupancy, and program guidelines. This article is educational and is not tax, legal, or insurance advice — consult the appropriate licensed professional for your situation.