Four point seven percent.
That is roughly the share of owner-occupied homes in the United States that changed hands last year. NAR counted 4.06 million existing-home sales in 2025, essentially flat on 2024 and the lowest level since 1995 (NAR existing-home sales, as reported by PBS). The Census Bureau counted 86.985 million owner-occupied housing units in the second quarter of 2026 (Census Housing Vacancies and Homeownership). Divide the first by the second and you get a national turnover rate a little under five percent, with the usual caveats that sales include some units that are not owner-occupied and that your zip code is not the country.
Hold that number, because it is the one that decides how big your farm needs to be, and it is the number that the standard advice about farm size leaves out entirely.
The coaching number, and what it quietly assumes
The figure you will hear is five hundred homes. Sometimes a range, three hundred to a thousand. It is delivered as a rule of thumb and it is rarely derived.
Run it against the turnover. A five-hundred-home farm at 4.7 percent turnover produces about 23 listings a year, total, across every agent in the market. If your goal is six listings a year from the farm, you need to win 26 percent of them. If your goal is ten, you need 43 percent. Those are not beginner shares. A quarter of all the listings in a neighborhood is what a dominant, decade-long incumbent holds, and it is exactly the position you are trying to take from someone.
So the five-hundred-home figure is not wrong. It just carries an unstated assumption that you will own the neighborhood, and it will feel like failure for the first several years while you do not.
The formula
Farm size is three numbers and a division.
homes in the farm = target listings per year / (local turnover rate x achievable market share)
Target listings is your number. How many listings a year do you want this farm to produce, on its own, once it is mature.
Local turnover has to be your own, never the national figure. Pull the last twelve months of closed sales inside the boundary you are considering, from the MLS, and divide by the number of homes inside it, from tax records or a parcel count. A retirement community might turn over at two percent. A starter-home subdivision might run eight. This is a twenty-minute exercise and it changes the answer more than any other input.
Achievable share is where honesty matters. Year one, you are winning a small fraction of the farm’s listings, perhaps one in twenty, because nobody knows you yet. A mature farm after three or four years of consistent presence might reach one in six or one in five. A dominant farm, the kind that took a decade, might exceed one in four. Pick the share you can reach in the timeframe you are planning for, not the one you hope for eventually.
Three shares, one target
Suppose you want six listings a year from the farm and the local turnover matches the national figure.
| Achievable share | Farm size needed | What that share represents |
|---|---|---|
| 5 percent | about 2,550 homes | Year one or two. Nobody knows you yet |
| 12 percent | about 1,060 homes | A farm you have worked consistently for three years |
| 25 percent | about 510 homes | A dominant, long-held farm. The coaching number |
Read the table from the bottom up. Five hundred homes is the right size for the farm you will have in year eight. In year one, at the share a newcomer can actually win, the same six listings require a farm five times larger, which you cannot afford to touch properly. That is the trap: size the farm for the mature share and starve for years, or size it for the year-one share and be unable to cover it.
The resolution: size for coverage, target for the climb
Set the boundary at the largest number of homes you can genuinely reach on the touch plan you intend to run, and let the listing target be whatever the math says it is at your current share. Then work to move the share, because the share is the only variable in the formula that you control.
For most solo agents that coverage ceiling lands somewhere between six hundred and twelve hundred homes. Below that the farm is too small to produce enough listings even at a strong share. Above it, the phone and mail and in-person touches become a part-time job in themselves and the consistency that farming depends on breaks down. If you have a team or an inside sales role, the ceiling rises, and the teams approach to shared lists changes the math again.
Then track share, not listings, as the farm’s primary metric. Six listings from a farm that produced twenty-four is a quarter share and a strong year. Six listings from a farm that produced ninety is a weak one, and the raw count would have hidden that.
How often to call it
The formula gives you a size. The size gives you a call frequency, because the total number of calls you can make into a farm in a year is bounded by two things: your own calling capacity, and the homeowner’s tolerance for hearing from you.
On tolerance, the guidance is short. Two to four calls a year per household is a presence. Monthly is a pattern the homeowner notices and does not enjoy. More than that, on a list you will be calling again next quarter, is how a farm gets a reputation before it gets a listing. Let mail carry the monthly rhythm and in-person carry two or three touches a year; the phone is for the calls that have a reason, which in a farm means the circle events inside the boundary and the check-in calls on a schedule the homeowner agreed to.
On capacity, do the multiplication. A thousand-home farm at three calls a year is three thousand dials, which is a handful of call blocks a month, which is affordable. At six calls a year it is six thousand, and it has started crowding out the expireds and FSBOs that pay the bills while the farm matures. Every farm call is subject to the same Do-Not-Call scrub and calling-hours check as any cold call, and the internal do-not-call list matters more here than anywhere, for the reasons in farming versus circle prospecting: you will be dialing this street again.
Run it on your own boundary
Before you commit to a farm, spend the twenty minutes. Count the homes. Pull the year’s closed sales. Divide. Then plug in the share you can defend for year one and see what listing count the farm actually promises you at that size. If the answer is one listing, and it often is, do not read that as a reason to abandon the farm. Read it as a reason to know what you are building, to budget the first two years as an investment rather than a lead source, and to measure the climb in share rather than in closings.
The five-hundred-home rule sounds like a plan. The formula is one. The circle prospecting hub carries the touch plan that turns the boundary into a presence, and the math above tells you how large a boundary that presence can honestly cover.