Engineering Division

The Engineering Division has the primary responsibility for processing grading and floodplain management permits, evaluating private roadway design and preliminary road exception applications, and enforcing stormwater pollution and prevention measures. 

We provide information and assistance to the public regarding compliance with various land development and environmental policies and regulations at the federal, state, and local levels. The Engineering Division is also responsible for the Federal Emergency Management Agency (FEMA) Floodplain Management implementation and resources, and implementation of the Napa County Road and Street Standards.

Please view the following documents for information on the draft 2023 Napa County Road and Street Standards

Community Outreach Meeting:  State Minimum Fire Safe Regulations

Click this link to view the presentation:

Click this link to watch a recording of the meeting:

The Board of Forestry and Fire Protection recently adopted the 2021 State Minimum Fire Safe Regulations, which apply to lands designated in the State Responsibly Area (SRA) and, since July 1, 2021, in the Local Responsibility Area (LRA) Very High Fire Hazard Severity Zone (VHFHSZ).  The SRA and VHFHSZ cover approximately 75% of Napa County. 


Napa County’s Planning, Building and Environmental Services Department and Fire Marshal’s office held a community outreach meeting on November 17, 2022 to provide information on:


  1. Recommendations presented to the Board of Supervisors and the Board’s direction regarding rule changes pursuant to the adopted State Minimum Fire Safe Regulations, 2021.
  2. Regulatory changes in Napa County to ensure local regulations equal or exceed the State Minimum Fire Safe Regulations;
    1. Napa County Road & Street Standards
    2. Zoning Code;
    3. Fire Code;
    4. Addressing guidelines;
  3. The process for development applications and land use entitlements within the covered areas.

The goal of the State Minimum Fire Safe Regulations is to reduce the risk to life and property due to wildfires in the SRA and the LRA VHFHSZ.  The goal of Napa County is to provide an effective and open process by collaborating with you and others in implementing these new requirements.  Napa County encourages comments and participation from the public.

Fire Rebuild Guidance:  Applicability of 2021 Road and Street Standards for Fire Rebuild Projects

The 2021 Napa County Road and Street Standards (RSS) offer relief to fire rebuild projects under Section Two (2), in accordance with the California Board of Forestry’s Emergency Fire Safe Regulations issued in 2020. 

The Engineering Division has created this applicability guide to provide guidance to fire rebuild projects in determining the allowable structure size to gain relief from the RSS. 

Read more about the Applicability of 2021 Road and Street Standards for Fire Rebuild Projects.

Review the complete Road and Street Standards here.

  1. Programs & Services
  2. Other Department Information

Engineering services not listed below are part of the Public Works Department. These services include reviewing record map submittal and processing applications for lot line adjustments and certificates of compliance. Additionally, the Engineering division in the Public Works Department will continue to be responsible for maintaining land development records such as record maps and right of way mapping. You may also continue to contact the surveyor via the Public Works Department.

Napa County Floodplain Ordinance

Issuance of floodplain management permits, and the implementation of codes, regulations and standards to reduce the potential for floods, and to minimize the potential for flood-related losses, both public and private, thereby promoting the public health, safety and general welfare of the residents of this County.

Napa County Excavation & Grading Ordinance

Issuance of grading permits and inspection of excavation, grading and earthwork construction, including fills and embankments.

Napa County Road & Street Standards

Evaluation of private roadway design and preliminary road exception applications in accordance with the objectives and design criteria Napa County Road and Street Standards while striving to maintain the preservation of the health, safety, and welfare of the public.

Napa County Stormwater Ordinance

Enforce stormwater pollution and inspect stormwater pollution prevention best management practices in an effort to reduce the adverse effects of polluted runoff discharges to protect and enhance watercourses, fish, wildlife habitat.

Pre-Application Meetings

Engineering Services staff recommends scheduling a consultation meeting with an Engineer to review your project and ideas, and avoid common submittal and processing pit-falls. To schedule an appointment, please call 707-253-4417.