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30 Carnahan Pl

Princeton, NJ · Mercer County · Residential · Block 7102, Lot 17

Watchdog Score

How it works
83/100

Strong tax position

The Watchdog Score, powered by the ROBUST Framework. Evidence coverage 55%, low confidence.

  • RRecourse90
  • OOverassessment Positionn/a
  • BBurden80
  • UUniformity85
  • SStabilityn/a
  • TTrajectoryn/a

Property tax

Compare towns
$13,2752024 tax bill
$13,6242025 at new rate
$498,500Assessed value
$20,124Princeton median
$2.7332025 rate

Among 6,839 homes in Princeton, the typical (median) tax bill is $20,124. This bill is lower than about 86% of them.

Town tax rate per $100
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25

Sales

Nearby sales
No recorded sale priceThis property's last sale
305Similar sales since 2023
$1,300,000Median price

Is this your home?

Claim it to follow its assessment, tax and score in your Watchdog account. Once ownership is verified, you can add a photo that shows wherever this address appears on Watchdog.

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Recent sales nearby

AddressSoldPriceBuilt
35 Carnahan PlSame streetOct 2023$1,750,0002015
18 Henry AveJan 2024$850,0001959
10 Harris RdAug 2024$1,496,0002017
14 Harris RdDec 2023$1,060,0001928
156 Jefferson RdJun 2024$1,600,0001920
61 Harris RdJan 2024$1,860,0002024

Same property type in the same town, same street first. Prices come from the state tax list, which runs about a year behind, and can include sales between relatives or other non-market transfers.

Homeowner tools

  • Could an appeal lower this bill?The appeal estimator opens with this property's assessment and the town tax rate filled in.
  • Appeal deadlinesUsually April 1 (May 1 after a town-wide revaluation), or 45 days after assessment notices go out if later.
  • ANCHOR, Senior Freeze and Stay NJCheck which state property tax relief programs apply.
  • Buying here?Monthly cost with the real tax bill included.
  • Selling? CO requirementsResale certificate of occupancy and smoke detector certificate rules for Princeton.
  • Princeton property taxesTypical bill, tax rate and appeal deadline for the town.
  • MapOpen this address in Google Maps.

Property record

Block / lot
7102 / 17
Property class
Residential (2)
Year built
1950
Building
1S F 2G
Dwelling units
1
Lot size
0.40 acres
Land value
$395,000
Improvement value
$103,500
County
Mercer County

Same block

  • 283-287 Witherspoon St$11,635 tax
  • 319 Witherspoon St$10,934 tax
  • 321-323 Witherspoon St$23,501 tax
  • 325-327 Witherspoon St$17,845 tax
  • 25 Guyot Ave$12,037 tax
  • 42 Carnahan Pl$11,734 tax
  • 38 Carnahan Pl$14,508 tax
  • 34 Carnahan Pl$13,044 tax

Get alerts for this property

We check the state tax list once a month and email you if the assessment, tax bill or Watchdog Score for 30 Carnahan Pl changes. Unsubscribe any time.

Property report (PDF)

A printable report for 30 Carnahan Pl: tax and assessment, the Watchdog Score, how the bill compares in Princeton, recent nearby sales and appeal dates.

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Questions

How much are the property taxes at 30 Carnahan Pl?

The latest annual property tax on the New Jersey tax list is $13,275, on an assessed value of $498,500.

How does this tax bill compare with others in Princeton?

Among 6,839 homes in Princeton, the typical (median) tax bill is $20,124. This bill is lower than about 86% of them.

What is the Watchdog Score?

The Watchdog Score, powered by the ROBUST Framework, rates a property's tax position from 0 to 100 using six kinds of public evidence. Higher is better. This property scores 83 (Strong tax position).

Can the assessment be appealed?

Yes. Appeals go to the Mercer County Board of Taxation. In most towns the deadline is April 1 (May 1 after a town-wide revaluation), or 45 days after assessment notices are mailed if that is later.

Does Watchdog show who owns this property?

No. Watchdog does not show owner names or mailing addresses. Everything on this page comes from public tax and parcel records.

Source: New Jersey MOD-IV tax list and NJ Office of GIS parcel data, refreshed monthly (last refresh October 2026). Town tax rates from the NJ Division of Taxation. Watchdog does not show owner names. How we get our numbers

Photo by Zac Gudakov on Unsplash
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