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Featured local agent — Williamstown, NJ
Sarah Mitchell
Compass Real Estate · Williamstown, NJ
“Your trusted relocation specialist since 2009. 350+ homes sold. Zero-pressure, data-first approach.”
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Williamstown, NJ Housing Market
The typical home in Williamstown, NJ is worth $374,477, rose 2.8% over the past year (Zillow Home Value Index, August 2026). The last median sale price Redfin published was $372,500, -5.1% year over year (through May 2026). With 1.9 months of supply and homes going under contract in about 40 days, Williamstown is a seller's market. At today's 7.03% 30-year fixed rate, 20% down on a $374,477 home is about $1,999/mo in principal and interest.
Key numbers for Williamstown, NJ
Typical home value
$374,477
+2.8% in 12 months
Zillow, August 2026
Typical asking rent
$2,425/mo
Zillow Observed Rent Index
Zillow, August 2026
Median sale price
$372,500
-5.1% year over year
Redfin, through May 2026
Days on market
40
Average pace
Redfin, through May 2026
Active listings
35
1.9 months of supply
Redfin, through May 2026
30-yr fixed rate
7.03%
Freddie Mac weekly average
Freddie Mac via FRED, September 2026
Median household income
$87,021
Home costs 4.3x income
U.S. Census ACS, 2023
Sale-to-list ratio
99.4%
Selling below asking
Redfin, through May 2026
Zillow figures are as of August 2026 and refresh monthly. Redfin figures are through May 2026 — Redfin stopped publishing its public market trackers in June 2026, so those numbers are final, not current. Mortgage rates come from Freddie Mac via FRED and update weekly.
Is Williamstown a buyer's or seller's market?
Williamstown, NJ is a seller's market, based on 1.9 months of supply and homes selling in about 40 days. Under 2 months of supply is a severe shortage: expect competition on almost anything priced correctly, and little room to negotiate below asking.
Inputs are Redfin's final published period (May 2026). How we classify markets · Where the data comes from
What does the Williamstown housing market data show?
Every row below is Redfin's final published month for Williamstown, NJ. Redfin, through May 2026
| Metric | Value |
|---|---|
| Median sale price | $372,500 |
| Median list price | $379,900 |
| Year-over-year price change | -5.1% |
| Median price per sq ft | $230/sq ft |
| Median days on market | 40 days |
| Active inventory | 35 listings |
| Months of supply | 1.9 months |
| Sale-to-list price ratio | 99.4% |
| Homes sold (that month) | 18 |
| New listings (that month) | 21 |
| Listings with a price cut | 34.3% |
| Market condition | Seller's market |
How to read these numbers
- Median sale price
- Half the homes that closed sold for more than this, half for less. It moves with what kind of home sold that month, so a quiet month with two big sales can swing it. Redfin's figure for Williamstown is frozen at May 2026.
- Typical home value (ZHVI)
- Zillow's estimate of what a mid-market home in Williamstown is worth right now, whether or not it sold. It is smoother than the median sale price and it still refreshes monthly, which is why this page leads with it.
- Months of supply
- How long it would take to sell every active listing at the current pace. Under 3 favors sellers, over 6 favors buyers, and 3 to 6 is the balanced band.
- Days on market
- Median time from listing to accepted offer. Short means you should have financing ready before you tour; long means there is room to negotiate on price and repairs.
- Sale-to-list ratio
- Sale price divided by the last asking price. Above 100% means bidding above asking is normal here; below 100% means the typical buyer got a discount.
- Price per square foot
- The size-adjusted price. Use it to compare a 1,400 sq ft house to a 2,600 sq ft house, not to value your own home — lot, condition and age move it a lot.
- Listings with a price cut
- Share of active listings that dropped their asking price in the month. A high share is the earliest visible sign that sellers are ahead of what buyers will pay.
- Typical asking rent (ZORI)
- Zillow's repeat-rent index for asking rents on new leases. Paired with the home value it gives the price-to-rent ratio in the rent-vs-buy section below.
How have Williamstown home prices moved?
Over the last three years the median sale price in Williamstown, NJ rose 35.5%, from $275,000 to $372,500. The live Zillow value series has rose 2.8% in the last 12 months, which is the more current read now that Redfin's series has stopped. 34.3% of Williamstown listings cut their asking price in the final Redfin month — a high share, and the clearest sign that list prices were running ahead of what buyers would pay. For prices to fall meaningfully from here, supply would have to keep building past 1.9 months while the sale-to-list ratio slips below its current 99.4%. Watch those two together — they move before the median does.
Redfin, through May 2026 — the chart ends at Redfin's final published month.
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What does it cost to buy a home in Williamstown?
Priced off the typical home value of $374,477 at the current 7.03% 30-year fixed rate. These are principal and interest only — property taxes, homeowner's insurance, HOA dues and mortgage insurance are on top, and they vary enough by property that we will not guess them for you.
| Down payment | Cash at close | Loan amount | Monthly P&I |
|---|---|---|---|
| 20% | $74,895 | $299,581 | $1,999/mo |
| 5% | $18,724 | $355,753 | $2,374/mo |
Zillow, August 2026 for the price · Freddie Mac via FRED, September 2026 for the rate
What income do you need?
Lenders generally want housing costs under 28% of gross income. On the 20%-down payment of $1,999, that implies roughly $85,678 a year before you add taxes and insurance. The median household in Williamstown earns $87,021, about $1,343 more than that threshold — the typical local household clears the payment on a typical local home with 20% down. That puts the price-to-income ratio at 4.3x — above the historical 3x norm but in line with much of the country in 2026.
Run it with your own numbers: affordability calculator · mortgage calculator
Buying in Williamstown in the next 12 months?
Tell us your timeline. We send the Williamstown market brief: the price ranges that actually clear, how long homes sit, and what to fix on your credit before you apply.
Is it cheaper to rent or buy in Williamstown?
Typical asking rent in Williamstown, NJ is $2,425/mo, against a typical home value of $374,477. That is a price-to-rent ratio of 12.9x, which means buying tends to beat renting on monthly cost over a typical hold. Compared head to head, 20% down puts principal and interest at $1,999 a month — $426 less than renting before taxes and insurance, so ownership can win on monthly cost alone once you have the down payment.
Zillow, August 2026 for both value and rent
Add your own down payment, tax rate and time horizon in the rent vs. buy calculator.
Is inventory rising or falling in Williamstown?
Active listings in Williamstown, NJ went from 40 in May 2025 to 35 in May 2026, a -12.5% change. Falling inventory tightens competition. When supply drops while demand holds, sale-to-list ratios rise before the median sale price does.
| Month | Active listings | New listings |
|---|---|---|
| June 2025 | 36 | 16 |
| July 2025 | 41 | 20 |
| August 2025 | 46 | 22 |
| September 2025 | 49 | 20 |
| October 2025 | 49 | 20 |
| November 2025 | 47 | 21 |
| December 2025 | 40 | 13 |
| January 2026 | 34 | 13 |
| February 2026 | 37 | 15 |
| March 2026 | 36 | 15 |
| April 2026 | 35 | 26 |
| May 2026 | 35 | 21 |
Redfin, through May 2026
How does Williamstown compare to New Jersey and the U.S.?
Williamstown homes sell for $372,500 — 36% below the New Jersey median of $579,900. Against the national median of $410,700, Williamstown runs 9% lower. Year-over-year, Williamstown moved -5.1% against New Jersey's +3.7% — a bigger swing than the state as a whole.
| Market | Median sale price | YoY | Days on market |
|---|---|---|---|
| Williamstown, NJ | $372,500 | -5.1% | 40 days |
| New Jersey statewide | $579,900 | +3.7% | 35 days |
| United States | $410,700 | not published | not published |
City and state rows: Redfin, through May 2026 · U.S. row: Freddie Mac via FRED, April 2026 (MSPUS, quarterly)
What to do next in Williamstown
What buyers should watch
- Months of supply, currently 1.9. It turns before price does — when it climbs past 6, sellers start taking offers they would have rejected a quarter earlier.
- The share of listings cutting price, currently 34.3%. A listing that has already cut once is the one most likely to accept below asking.
- The gap between 5% and 20% down here is $375 a month in principal and interest alone, before mortgage insurance. That gap, not the price, is usually what decides your timeline.
- Rate moves. At 7.03%, every full point of rate change moves the payment on a $374,477 home more than a 5% price change does.
- Your credit tier before you shop, not after — it sets the rate you are quoted. Run your numbers first.
What sellers should know
- The median Williamstown listing goes under contract in 40 days. If yours passes that mark, the market is telling you the price is wrong — not that you need more showings.
- Homes here close at 99.4% of asking. Price to that ratio from day one rather than chasing the market down in cuts.
- In the last published month Williamstown added 21 new listings against 18 sales — more competition arriving than clearing, so early timing matters.
- Your equity moved +2.8% in the last 12 months on the Zillow value series. That, not the price you paid, is what sets your net proceeds.
- Comparable ZIP-level pricing inside Williamstown varies more than the citywide median suggests — check the ZIP pages below before you set a number.
Homes for sale in Williamstown
There are currently 35 homes listed for sale in Williamstown, New Jersey. The median listing price is $380K.
Active listings
35
Homes on market
Median list price
$380K
Avg. days on market
40
Days until sale
New this week
21
Newly listed
How much do homes cost in Williamstown by property type?
How the Williamstown, NJ market breaks down across single-family homes, condos and townhouses. Redfin, through May 2026
| Property type | Median price | Price / sq ft | Homes sold | Days on market |
|---|---|---|---|---|
| Single-family | $377,500 | $233/sq ft | 16 | 33 days |
| Condo / co-op | $315,000 | $147/sq ft | 1 | 144 days |
| Townhouse | $345,000 | $166/sq ft | 2 | 148 days |
Who lives in Williamstown?
American Community Survey estimates for Williamstown. U.S. Census ACS, 2023
Population
14,855
Households
5,854
Median income
$87,021/yr
Median age
40.6 years
Owner-occupied
79.6%
Median home value
$255,000
Median gross rent
$1,262/mo
Mean commute
35 min
79.6% of occupied homes in Williamstown are owner-occupied, and the rest are rented — which is the share that decides how much of the local housing stock ever reaches the for-sale market. The Census self-reported median home value is $255,000 against Zillow's $374,477 typical value; the gap is normal — ACS asks owners what they think their home is worth, Zillow models transactions. Census median gross rent (all leases, including long-held ones) is $1,262/mo, below Zillow's $2,425/mo asking rent on new leases — the difference is roughly what a mover pays over a stayer.
Which public schools serve Williamstown?
7 schools tracked · 5,871 students
The largest public schools serving Williamstown, NJ by enrollment, drawn from the National Center for Education Statistics. School quality is a commonly cited factor in home-buying decisions — these are the campuses families in this area are most likely to encounter.
Williamstown High School
Grades 9-12 · 1,773 students
Williamstown Middle School
Grades 5-8 · 1,744 students
Oak Knoll Elementary School
Grades PK-4 · 637 students
Radix Elementary
Grades PK-4 · 604 students
Holly Glen Elementary School
Grades PK-4 · 515 students
Whitehall Elementary School
Grades PK-4 · 384 students
Collings Lakes Elementary School
Grades PK-2 · 214 students
Source: National Center for Education Statistics, Common Core of Data directory. Updated annually. Ratings and test scores are not currently displayed.
Which cities are near Williamstown, NJ?
Ordered by distance from Williamstown, not by size. Compare Williamstown side by side with any of them.
Williamstown housing market FAQ
Is Williamstown a buyer's or seller's market?
Williamstown, NJ is currently a seller's market. That read comes from 1.9 months of supply, homes going under contract in about 40 days, and sellers getting 99.4% of their asking price in the last month Redfin published (May 2026).
How much do homes cost in Williamstown?
The typical home in Williamstown, NJ is worth $374,477 (Zillow Home Value Index, August 2026). The median sale price in the last month Redfin published was $372,500, about $230 per square foot.
Is Williamstown cheaper than the rest of New Jersey?
Williamstown's median sale price of $372,500 is 36% lower than the New Jersey statewide median of $579,900, and 9% below the U.S. median of $410,700. Both figures are for the same period.
How long do homes take to sell in Williamstown?
Homes in Williamstown, NJ spent a median of 40 days on market before going under contract, versus 35 days statewide. That is a normal pace: enough time to see a home twice, not enough to wait a month. (Redfin, through May 2026.)
What income do you need to buy a home in Williamstown?
At the current 30-year fixed rate of 7.03%, 20% down on a $374,477 home is about $1,999 a month in principal and interest. Lenders typically want that under 28% of gross income, which works out to roughly $85,678 a year before taxes, insurance, HOA dues or mortgage insurance. The local median household income is $87,021.
Are home prices rising in Williamstown?
The typical home value in Williamstown, NJ rose 2.8% over the last 12 months, from $364,453 to $374,477 (Zillow, August 2026). This is the live series — it refreshes monthly.
What are the cheapest ZIP codes in Williamstown?
Williamstown ZIP-level sale prices are not all published for the same period, so ranking them would compare different months. The ZIP pages listed on this page show what we hold for each one individually.
Is now a good time to buy in Williamstown?
That depends on your timeline, not on a headline. What the data says today: Williamstown, NJ is a seller's market with 1.9 months of supply, the 30-year fixed rate is 7.03%, and the price-to-rent ratio of 12.9x means buying tends to beat renting on monthly cost over a typical hold. Properties Incorporated publishes the data; it does not give financial advice.
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