Housing data for Green Knoll, NJ
Green Knoll, NJ has an estimated 6,789 residents and 2,495 homes (US Census Bureau, 2020–2024 American Community Survey).
It is an unincorporated community in Somerset County.
21.2% of households rent.
The median gross rent is $1,448 a month.
Figures last updated on .
- Residents
- 6,789 (±878)
- Housing units
- 2,495 (±253)
- Households that rent
- 21.2%
- Median gross rent
- $1,448
- Residents since 2015–2019
- +2.4%
What stands out in Green Knoll
Households without a vehicle: 9.0% (±3.3 points) in Green Knoll, higher than in Somerset County (4.0%).
Commuting by public transportation: 0.5% (±0.6 points) in Green Knoll, lower than in Somerset County (3.4%).
Homes heated by fuel oil: 1.6% (±1.4 points) in Green Knoll, lower than in Somerset County (4.3%).
Housing in Green Knoll at a glance
- Median rent: $1,448 median gross rent a month (Small sample: wide margin of error)
- Rent by bedrooms: $2,543 median gross rent, 2 bedrooms
- Rent burden: 53.1% of renters pay 30% or more of income
- Renters and owners: 21.2% of households rent
- Income and affordability: $165,227 median household income
- Home values: $597,100 median home value
- Homeowner costs: $3,310 median monthly cost with a mortgage
- Property taxes: $10,000 or more median real estate taxes a year
- Types of homes: 16.8% of homes are in buildings of 5 or more units
- Bedrooms: 67.0% of homes have 3 or more bedrooms
- Age of homes: 51.1% of homes were built before 1980
- Vacancy rate: 10.2% rental vacancy rate (Small sample: wide margin of error)
- Heating fuel: 73.4% heat with utility gas
- Commute and cars: 28.7 minutes average trip to work
- Growth: +2.4% residents since 2015–2019
- How long people stay: 19.4% moved in since 2020
- Crowding and facilities: 2.0% of homes have more than 1 person per room
Green Knoll against Somerset County, its state and the nation
| Green Knoll | Somerset County | New Jersey | United States | |
|---|---|---|---|---|
| Residents | 6,789 (±878) | 349,846 (exact) | 9,343,809 (exact) | 334,922,499 |
| Housing units | 2,495 (±253) | 133,639 (±156) | 3,791,354 (±469) | 143,775,355 |
| Households that rent | 21.2% (±5.8 points) | 25.7% (±0.9 points) | 36.2% (±0.2 points) | 34.8% |
| Median gross rent | $1,448 (±$890) | $2,033 (±$52) | $1,720 (±$7) | $1,413 |
| Median household income | $165,227 (±$33,580) | $140,374 (±$3,294) | $103,556 (±$513) | $80,734 |
| Median home value | $597,100 (±$30,926) | $552,100 (±$7,374) | $454,400 (±$1,150) | $332,700 |
| Median real estate taxes (a year) | $10,000 or more | $10,000 or more | $9,590 (±$25) | $3,119 |
| Built before 1980 | 51.1% (±8.2 points) | 46.3% (±1.3 points) | 62.8% (±0.3 points) | 49.7% |
| Average commute | 28.7 minutes (±2.3) | 31.4 minutes (±0.7) | 30.5 minutes (±0.1) | 26.4 minutes |
| Households with broadband | 94.4% (±3.1 points) | 95.8% (±0.5 points) | 92.8% (±0.1 points) | 91.0% |
| Median age of residents | 44.5 years (±2.7) | 41.8 years (±0.2) | 40.1 years (±0.1) | 38.9 years |
Green Knoll covers 4.6 square miles of land, about 1,465 residents per square mile (Census Bureau Gazetteer).
How Green Knoll has changed since 2015–2019
| 2015–2019 | 2020–2024 | Amount of change | Verdict | |
|---|---|---|---|---|
| Residents | 6,631 (±539) | 6,789 (±878) | +2.4% | Not a measurable change |
| Housing units | 2,401 (±159) | 2,495 (±253) | +3.9% | Not a measurable change |
| Median gross rent | $1,161 (±$138) | $1,448 (±$890) | +24.7% | No measurable change after inflation |
| Median home value | $482,500 (±$19,986) | $597,100 (±$30,926) | +23.8% | No measurable change after inflation |
| Median household income | $118,016 (±$18,684) | $165,227 (±$33,580) | +40.0% | No measurable change after inflation |
| Median owner cost with a mortgage | $2,983 (±$220) | $3,310 (±$260) | +11.0% | No measurable change after inflation |
| Households that rent | 27.1% (±4.2 points) | 21.2% (±5.8 points) | −5.9 percentage points | Not a measurable change |
| Rental vacancy rate | 0.0% (±5.3 points) | 10.2% (±10.5 points) | +10.2 percentage points | Not a measurable change |
The Census Bureau publishes 2015–2019 dollars in 2019 dollars and 2020–2024 dollars in 2024 dollars.
Prices (the CPI-U, US Bureau of Labor Statistics) rose 22.7% between 2019 and 2024, so a dollar figure’s verdict compares the two after raising the earlier one by that much, using the Census Bureau’s test for a difference.
The two periods do not overlap, as the Census Bureau recommends for 5-year estimates.
Crime reported to police in Somerset County
Green Knoll has no police department of its own in the FBI’s figures, so this is the figure for Somerset County as a whole.
In 2025, the police departments that report for Somerset County recorded 60 violent and 566 property crimes per 100,000 residents.
A county-wide figure describes the whole county, not this place; crime varies from one community to the next.
ZIP codes in Green Knoll
| ZIP code | Share of the ZIP’s land in this place | Residents | Median gross rent | Median home value | Median household income |
|---|---|---|---|---|---|
| 08807 | 18% | 39,560 | $2,176 | $591,200 | $168,696 |
A ZIP code is a mail route rather than a boundary, so the Census Bureau publishes figures for ZIP Code Tabulation Areas built from census blocks; the share column says how much of each one’s land lies in this place.
Places near Green Knoll
| Place | Distance | Median gross rent | Median home value | Households that rent |
|---|---|---|---|---|
| Bridgewater Center | 1.7 mi | $2,662 | $703,700 | 11.0% |
| Martinsville | 2.0 mi | $2,171 | $720,400 | 4.0% |
| Somerville Borough | 2.4 mi | $1,802 | $435,700 | 57.0% |
| Raritan Borough | 2.8 mi | $2,112 | $456,900 | 50.1% |
| The Hills | 3.4 mi | $2,376 | $577,000 | 17.0% |
| Bradley Gardens | 3.4 mi | $2,670 | $546,300 | 9.8% |
| Finderne | 3.7 mi | $2,114 | $413,400 | 40.3% |
| Liberty Corner | 4.3 mi | $3,500 or more | $1,187,500 | 31.7% |
Places in New Jersey most like Green Knoll
| Place | Median gross rent | Median home value | Median household income | Households that rent |
|---|---|---|---|---|
| Chester Borough | $1,344 | $659,800 | $171,500 | 20.9% |
| Randolph Township | $1,808 | $670,700 | $175,000 | 22.2% |
| Stirling | $1,427 | $695,300 | $180,875 | 16.4% |
| Wall Township | $1,762 | $720,400 | $142,768 | 16.6% |
| Moorestown Township | $1,718 | $697,200 | $159,700 | 18.7% |
| Dover Beaches South | $1,489 | $753,400 | $144,844 | 7.5% |
Matched on rent, home value, income, the share who rent, the age of the homes, the share in apartment buildings and the commute, each measured against the spread across New Jersey.
HUD Fair Market Rent for Green Knoll, fiscal year 2027
| Studio | 1 bedroom | 2 bedrooms | 3 bedrooms | 4 bedrooms |
|---|---|---|---|---|
| $1,953 | $2,103 | $2,623 | $3,125 | $3,508 |
HUD income limits for Green Knoll, fiscal year 2026
| Household size | Extremely low (30%) | Very low (50%) | Low (80%) |
|---|---|---|---|
| 1 person | $32,550 | $54,200 | $80,200 |
| 2 people | $37,200 | $61,950 | $91,700 |
| 3 people | $41,850 | $69,700 | $103,150 |
| 4 people | $46,450 | $77,400 | $114,600 |
| 5 people | $50,200 | $83,600 | $123,800 |
| 6 people | $53,900 | $89,800 | $132,950 |
| 7 people | $57,600 | $96,000 | $142,150 |
| 8 people | $61,350 | $102,200 | $151,300 |
These are the limits HUD sets for its housing programs in the Middlesex-Somerset-Hunterdon, NJ HUD Metro FMR Area, where HUD’s median family income for fiscal year 2026 is $154,800.
A program can use its own limits; tax-credit and local programs often do.
Green Knoll is a census-designated place: an unincorporated community the Census Bureau draws for statistics, with no municipal government of its own.
It lies inside Bridgewater Township, whose figures include it.
Survey years: 2020–2024 (American Community Survey 5-year estimates), compared with 2015–2019.
Margins of error are at the 90% confidence level.
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Questions about Green Knoll
How much is a one-bedroom apartment in Green Knoll?
The median gross rent for a one-bedroom home in Green Knoll, NJ is $1,313 (±$1,029) a month (2020–2024 American Community Survey).
Are renters in Green Knoll rent-burdened?
53.1% of renting households in Green Knoll pay 30% or more of their income in gross rent, the share housing researchers usually call rent-burdened (2020–2024 American Community Survey).
How many renters are there in Green Knoll?
Green Knoll has an estimated 501 (±164) renting households, 21.2% of its occupied homes (2020–2024 American Community Survey).
What is the median household income in Green Knoll?
The median household income in Green Knoll is $165,227 (±$33,580) a year (2020–2024 American Community Survey).
What is the average home value in Green Knoll, NJ?
The Census Bureau publishes the median: $597,100 (±$30,926) for owner-occupied homes in Green Knoll (2020–2024 American Community Survey).
What is the average mortgage payment in Green Knoll?
The Census Bureau publishes total owner costs rather than the mortgage alone: the median for owners with a mortgage in Green Knoll, NJ is $3,310 (±$260) a month, including taxes, insurance and utilities.
Is Green Knoll growing?
In Green Knoll, the number of residents went from 6,631 in 2015–2019 to 6,789 in 2020–2024 (+2.4%), not a measurable change.
What ZIP codes are in Green Knoll?
The ZIP code that covers Green Knoll is 08807.
What is the median rent in ZIP code 08807?
The median gross rent in ZIP Code Tabulation Area 08807 is $2,176 (±$140) a month (2020–2024 American Community Survey).
Sources
- Demographic and Housing Estimates (DP05), 2020–2024 ACS 5-year estimates — Green Knoll CDP, New Jersey
- Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Green Knoll CDP, New Jersey
- Selected Economic Characteristics (DP03), 2020–2024 ACS 5-year estimates — Green Knoll CDP, New Jersey
- Median Real Estate Taxes Paid by Mortgage Status (B25103), 2020–2024 ACS 5-year estimates — Green Knoll CDP, New Jersey
- Selected Social Characteristics (DP02), 2020–2024 ACS 5-year estimates — Green Knoll CDP, New Jersey
- Total Population (B01003), 2015–2019 ACS 5-year estimates — Green Knoll CDP, New Jersey
- Median Gross Rent (B25064), 2015–2019 ACS 5-year estimates — Green Knoll CDP, New Jersey
- HUD Fair Market Rents, fiscal year 2027: Middlesex-Somerset-Hunterdon, NJ HUD Metro FMR Area
- HUD Income Limits, fiscal year 2026: Middlesex-Somerset-Hunterdon, NJ HUD Metro FMR Area
- US Census Bureau, American Community Survey 2020–2024 5-year estimates for ZIP Code Tabulation Areas
- Consumer Price Index for All Urban Consumers (CPI-U), US city average, all items, US Bureau of Labor Statistics: annual averages 2019 and 2024
- US Census Bureau, 2024 Gazetteer Files
To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Green Knoll CDP, New Jersey (place:27840, in state:34).
Each estimate (E or PE) has a margin of error beside it (M or PM).
The 2015–2019 figures are B01003_001E, B01003_001M, B25064_001E, B25064_001M from the 2019 release.
The API needs a free key.
DP05_0001E, DP05_0001M, DP04_0001E, DP04_0001M, DP04_0047PE, DP04_0047PM, DP04_0134E, DP04_0134M, DP03_0062E, DP03_0062M, DP04_0089E, DP04_0089M
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.
Figures last updated on .