Mercer County
Mercer County Department of Transportation and Infrastructure, Highway Division
In short
Mercer County Department of Transportation and Infrastructure, Highway Division issues 1 permit we publish for Mercer County, last verified 2026-10-10. Each carries the fee as the agency publishes it, with a link to the schedule it was read from.
What this agency issues
| Permit | Issuing agency | Fee | Renews | Last checked |
|---|---|---|---|---|
| County Road Construction Permit / Right-of-Way Occupancy Permit (Including New or Modified Driveways on a County Road)only if it applies to you | Mercer County Department of Transportation and Infrastructure, Highway Division | Per the county's 2025 permit application form, linked from the Highway Division page. Road Construction Permit: single or common residential driveway $250.00 each; non-residential access $400.00 per access; transverse trench $250.00; longitudinal trench $400.00 up to 100 linear feet plus $150.00 per additional 100 linear feet or part; street intersection $400.00; roadway modification (auxiliary lanes or widening) $2.00 per square yard; curbing $2.00 per linear foot; pavement marking modification $100.00; guiderail modification $1.00 per linear foot; traffic signal modification $250.00; drainage structure modification $250.00; paving access driveway $100.00; temporary driveway / construction access $250.00 (12 months maximum). Right-of-Way Occupancy Permit: longitudinal trench $100.00 up to 100 linear feet plus $100.00 per additional 100 linear feet or part; sidewalk $500.00; sign installation $50.00 each; other encroachment within the right-of-way (lane or shoulder closure and similar) $250.00. Other: application re-submittal $100.00; re-inspection $75.00; violation assessment for unauthorized work $750.00 each. Fees are waived when the work is part of a site plan approved by Mercer County (Code §5.03.030(C)(3)) | expires one year from the date of issuance; if work has not begun within that year, a new application and a new fee are required (Code §5.03.030(D)(2)) | 2026-10-10 |
Fees shown as a range or formula are set that way by the issuing agency — we do not average them into a single number.
About each permit
County Road Construction Permit / Right-of-Way Occupancy Permit (Including New or Modified Driveways on a County Road)
Under Code §5.03.030(B)(1), a Road Construction Permit or Right-of-Way Occupancy Permit is required 'for any disturbance to the roadway surface or construction of a new street or driveway access to a County road', with examples including new driveway construction, driveway apron modifications, curb installation and sign installation; §5.03.030(B)(3) requires one for each new or modified driveway or road intersection encroaching on a county road or right-of-way. A business opening or reworking an entrance on a county road therefore needs this permit, usually obtained by its contractor. Code §5.03.030(D)(1) sets the permit fee 'as shown in Attachment A of this chapter', and the code's editor's note states that Attachment A is available from the County offices. The figures here are those printed in the county's 2025 permit application form, linked from the Highway Division page; the county's 2023 form prints the same dollar figures. Fees are not refunded or credited once paid (§5.03.030(D)(3)), and inspection outside 7:30 a.m. to 3:30 p.m. on weekdays is billed at the inspector's prevailing wage (§5.03.030(D)(4)). The completed application and approved permit are required at least two weeks before work starts (§5.03.030(C)(1)), and the form requires a bond based on an engineer's estimate or contractor quote. Checks are payable to County of Mercer and go to Mercer County DOT, 300 Scotch Road, Building 1, Ewing, NJ 08628. Questions about county engineering standards go to the Office of the County Engineer at (609) 989-6600.
Contact
- Jurisdiction
- Mercer County
- Phone
- 609-530-7500 ext. 130
Contact details are taken from the agency’s own site or its published fee schedule. Where we have not verified a phone number we leave it blank rather than guess.
Sources
Every fee and term above was read from one of these government pages on the date shown.
- Mercer County Code, Chapter 5.03 (County roads; roadway construction and right-of-way occupancy permits)County of Mercer, New Jersey (ecode360) · primary source · retrieved 2026-10-10
- Mercer County DOT Highways Division, Application and Permit for Road Work in Mercer County (2025, with RCP/ROWOP fee schedule)County of Mercer, New Jersey · primary source · retrieved 2026-10-10
- Mercer County Highway Division pageCounty of Mercer, New Jersey · primary source · retrieved 2026-10-10
- Mercer County Road Work Permit Application (2023 version)County of Mercer, New Jersey · primary source · retrieved 2026-10-10
Other offices serving Mercer County
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