Mercer County, NJ

Mercer County, NJ assessor property search and records

Use this county guide to find official assessor property search resources, recorder and deed links, tax records, GIS parcel maps, permits, and property data insights for Mercer County, New Jersey. Search an address or APN, then jump to official county sources or property tax and value data.

Official sources

Mercer County assessor, recorder, tax, and parcel map sources

Use this table to find the official county source for assessor property search, recorded documents, property tax, GIS parcel maps, permits, and zoning records.

Mercer County official assessor, tax, deed, GIS, permit, and land-use sources
Record typeOfficial sourceNotes
Assessed valuesMercer County Property Information Portalwww.mercercounty.org/departments/planning/property-information-portal
  • Access is currently restricted to government staff and authorized professionals due to Daniel's Law.
  • Public users are directed to contact the County Clerk or Tax Administrator offices directly.
Deeds and recorded documentsMercer County Clerk Official Records Searchwww.mercercounty.org/government/county-clerk
  • The County Clerk maintains land records, deeds, and mortgages.
  • Public users must register to access the online search portal.
Property taxesMercer County Property Information Portalwww.mercercounty.org/departments/planning/property-information-portal
  • Tax assessment data is maintained by the County Tax Administrator.
  • Public access is currently restricted; contact the Board of Taxation for official records.
GIS and parcel mapsNJ Office of GIS - Mercer County Parcel Datanjogis-newjersey.opendata.arcgis.com/documents/d99b8d35f7a64621b8d776d0074e06b6
  • Provides parcel maps and MOD-IV tax assessment data.
  • Maps are for informational purposes and do not constitute a legal survey.
Permits and building recordsMunicipal Building Permit Portalswww.lawrencetwp.com/BuildingPermit
  • Permit records are decentralized and managed at the municipal level (e.g., Lawrence Township).
  • Users should check the specific municipality's website for building and zoning permits.
Zoning and land useMunicipal Land Use and Zoningwww.hamiltonnj.com/280/Land-Use
  • Zoning and land use regulations are managed by individual municipalities within Mercer County.
County data

Mercer County tax rates and property values

County and city-level rollups from AssessorSearch indexed property data. Use these values as directional context, then verify parcel-specific details with the official county sources above.

Median estimated value$444,784

Median estimated market value for properties in this county.

AssessorSearch county data
Median assessed value$217,500

Median assessed value from county assessment records when available.

AssessorSearch county data
Median annual property tax$7,795

Median annual property tax amount from indexed tax records when available.

AssessorSearch county data
Median effective property tax rate1.73%

Median effective property tax rate calculated from annual tax and value fields.

AssessorSearch county data

City property data

Top city rollups for estimated value, assessed value, property tax rate, and tax amount.

Mercer County city-level property value and tax-rate rollups
CityMedian estimated valueMedian assessed valueMedian effective property tax rateMedian tax amount
Trenton$334,932$142,0001.71%$5,524
Ewing$385,944$196,5002.00%$7,701
Lawrence Township$483,571$239,4001.55%$7,364
Princeton Junction$979,768$525,5001.67%$16,042
Princeton$1,265,088$729,7001.55%$19,762
East Windsor$474,016$235,0001.81%$8,645
Robbinsville$666,699$344,9501.75%$11,626
Pennington$695,831$422,4001.89%$13,367
Hightstown$531,934$228,6002.05%$10,767
Hopewell$674,584$409,8002.01%$13,645
FAQ

Mercer County property records FAQ

Common questions about assessor, deed, tax, GIS, and permit records.

Where can I verify assessed value in Mercer County?

Use the official Mercer County Property Information Portal for assessed values, parcel details, exemptions, and property characteristics when those records are available online.

Where can I find deeds or recorded documents in Mercer County?

Use the official Mercer County Clerk Official Records Search for deeds, mortgages, liens, plats, and other recorded documents. These records are usually separate from assessor property-value records.

Where can I view parcel maps or GIS data in Mercer County?

Use the official NJ Office of GIS - Mercer County Parcel Data for parcel maps, map layers, boundaries, and GIS context. GIS maps should be treated as reference tools, not legal surveys.

Can I build a list of Mercer County property owners?

Use Affix by AssessorSearch for county property owner lists, filters, exports, skip tracing, and outreach workflows.

Need many owners? Build targeted property lists with Affix
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More New Jersey property records

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