Why the ‘Best Week to List a House’ Keeps Changing for South Jersey Sellers

By Mike Lentz | The Mike Lentz Team – Keller Williams Realty

Zillow Says Late May. Realtor.com Said April 12-18. Here’s What South Jersey Sellers Should Actually Focus On.

Every spring, a different big real estate brand tells you which week to list. In March, Realtor.com picked April 12-18. Now Zillow has run the same kind of study and landed on late May. Their numbers are real. Homes listed in late May sold for about 1.7% more nationally, or roughly $6,000 on a typical U.S. home.

So which one is right? Both, sort of. And neither, in the way that actually matters to you.

Two Studies, Two Different “Best Weeks.” That’s the Tell.

Realtor.com and Zillow are not arguing about a small detail. They are six weeks apart. Same year, same housing market, two of the largest data sets in residential real estate, two different verdicts. That gap is the most useful thing in either study.

It tells you the “best week to list” is not a fixed truth. It is a national average that shifts depending on which homes happened to list when, which buyers happened to be active, and how the composition of inventory looked that month.

Zillow’s own data confirms it. They flag Boston’s best window as the last two weeks of May, worth 3.4% or roughly $25,300 to a typical seller. Then Seattle’s best window? The first two weeks of April, worth 2.9% or about $22,600. Inside the same Zillow study, two cities point to two different months.

If “late May” does not hold across cities in Zillow’s own research, it does not transfer cleanly to Glassboro, Cherry Hill, or Mount Laurel either.

Why “Best Week” Data Doesn’t Tell the Whole Story

We covered this in detail in our in-depth guide on timing your home sale, because this kind of advice can cost South Jersey sellers money when followed blindly.

The core issue is simple. You can’t run a controlled experiment on your own home. You list it once, under one set of conditions. That is it.

“Best week” research compares different homes in different markets at different times, then calls the result a trend. It cannot account for why spring medians run higher. A big reason: higher-end homes with pools and bigger lots naturally list in warmer months. That pulls the average up. It is a composition effect, not proof that your Deptford ranch sells for more in late May than late February.

In South Jersey, post-pandemic inventory compressed seasonal patterns. Across Gloucester, Camden, Burlington, Salem, and Cumberland counties, well-priced homes sell at or above list price every quarter. Not just spring. The days-on-market gap between the “best” and “worst” months runs in the single digits.

The Math on Waiting

Say you are a seller in Washington Township or Voorhees. Your home, finances, and headspace are aligned right now, in early May. Should you wait three weeks to hit the Zillow window?

Maybe. Three weeks is not a big deal for most people.

The bigger version of that mistake is what we see more often. A seller hears “spring is best” in January and waits four months. On a $375,000 home, four months of mortgage payments, property taxes, insurance, and utilities add up fast. That holding cost can easily exceed whatever seasonal bump the data suggests.

Worse, the studies themselves keep moving. If you waited from January for “April 12-18” because Realtor.com said so, you would have just missed the window Zillow now says was the right one. Chasing a national bullseye that moves six weeks at a time is not a strategy. It is a coin flip dressed up in charts.

We walk through the full math on holding costs in our timing guide, including the numbers most “best week” articles leave out.

What Actually Determines Your Best Time To Sell

After years of selling homes across this region, we keep coming back to the same three things. They matter far more than any calendar date Zillow or Realtor.com publishes.

Your readiness. Not just financially. Emotionally. Sellers who are excited about the next chapter make faster decisions. They handle feedback well. They keep the process moving. Sellers who are not ready yet overprice. They resist showings. They stall at the negotiation table. The week they listed does not save them.

Your home’s condition. A clean, decluttered house priced right on day one will outperform one that is “waiting for the perfect week.” Deferred maintenance and an ambitious ask get punished regardless of the season. Buyers have more options than they did two years ago. They are not forgiving sloppy prep just because it is late May.

Your next-move plan. Where are you going? Do you need to sell before you buy? Moving out of state? Downsizing inside Camden or Gloucester County? The logistics of your next step dictate your real timeline, not Zillow’s calendar. Still working that out? Understanding realistic timelines is a better starting point than chasing a specific listing week.

So Should You Ignore Late May?

Not necessarily. If you are already prepared, your home looks great, you know where you are headed, and you are ready to go, then listing during a week with higher buyer traffic is a nice bonus. Think of it as a tailwind. It helps. It is not what gets the plane off the ground.

What you should not do: rush to list before you are ready just to hit a date. Or delay when you are ready because Zillow’s chart says wait. Either mistake costs more than any weekly timing advantage could recover.

Even Zillow’s own economist made the point in their press release: most sellers cannot time the market, because life events drive most moves. New job. New baby. Aging parent. School district change. Those events do not check a chart before they happen.

Bottom Line

The best time to list your house depends on more than a Zillow chart, a Realtor.com calendar, or whichever brand publishes next. Both studies are interesting. Neither is useless. Each is one data point built on national averages. Your home sale is not a national average. It is a specific house, in a specific South Jersey neighborhood, sold by a specific person with specific goals.

The best time to list your house is the week when you, your home, and your plan are all ready. We cover exactly how to evaluate that in our complete guide to timing your home sale.

Want help figuring out where you stand on those three things? That’s the conversation we have every day. No pressure, no gimmicks. Just an honest look at whether now is your time.