Jacksonville Detached Garage Site Plan: Setbacks, Access and Stormwater

A detached garage can provide secure parking, storage and workspace without changing the main house. Before building one in Jacksonville, however, the location must be checked against zoning setbacks, lot-coverage limits, driveway access, drainage conditions and building-permit requirements.

A clear Jacksonville detached garage site plan helps reviewers see exactly where the garage will be placed, how far it sits from property lines and other buildings, how vehicles will reach it and where stormwater will flow after construction.

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Start with an easy-to-read plan showing the proposed garage, property lines, setbacks, driveway and important site features.


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Jacksonville detached garage site plan showing setbacks, vehicle access and stormwater flow
A Jacksonville garage site plan can document the proposed building, setbacks, driveway access, easements and stormwater-flow direction.

Confirm Which Jacksonville Jurisdiction Applies

Jacksonville and Duval County operate under a consolidated government, but not every Duval County property uses the same zoning and permitting department.

The City of Jacksonville specifically notes that Atlantic Beach, Neptune Beach, Jacksonville Beach and the Town of Baldwin maintain separate zoning and building departments.[1]

Before preparing a garage plan, confirm:

  • The authority responsible for the property;
  • The property’s zoning district;
  • Whether a Planned Unit Development applies;
  • Whether the lot is in a flood hazard area;
  • Whether airport, historic or other special requirements apply;
  • Whether an HOA or private covenant restricts detached garages.

This is important because setbacks, maximum lot coverage, building height and other development criteria depend on the property’s zoning district.

Does a Jacksonville Detached Garage Require a Permit?

Yes. The City of Jacksonville states that a building permit is required for construction that physically changes or adds structures to a property, including new buildings.[2]

The city’s current one- and two-family checklist applies to new residential buildings, additions and accessory structures. It identifies several documents that may be required, including:

  • Architectural plans;
  • A site and drainage plan or legal survey;
  • Structural plans;
  • Product-approval information;
  • Flood-hazard documentation when applicable;
  • Truss or engineered-lumber documents;
  • Septic or utility documentation when applicable.

A basic site plan can document the property layout and proposed garage location, but it is not automatically the complete permit package. Jacksonville’s checklist states that structural plans must be digitally signed and sealed and include foundation, framing and structural load-path information.[3]

What Should the Garage Site Plan Show?

Jacksonville’s residential checklist says a site and drainage plan or legal survey should show building dimensions, setbacks from all property lines, a north arrow, driveways, sidewalks, accessory structures, drainage conditions, finished-floor elevation and surface or stormwater flow.[3]

For a detached garage, the plan should generally identify:

  • Property address and parcel information;
  • North arrow and drawing scale;
  • Property boundaries and lot dimensions;
  • Existing house and accessory structures;
  • Proposed garage footprint and exterior dimensions;
  • Distance from the garage to every relevant property line;
  • Distance between the garage and the house;
  • Garage height and number of stories;
  • Roof overhangs and other projections;
  • Garage-door location and direction;
  • Existing and proposed driveway access;
  • Sidewalks, curbs, culverts and right-of-way areas;
  • Recorded utility, drainage and access easements;
  • Existing and proposed drainage direction;
  • Finished-floor or slab elevation when required;
  • Wells and onsite septic systems when applicable;
  • Flood-zone information when applicable.

The garage’s orientation and dimensions should remain consistent across the site plan, architectural plans, foundation plan and structural drawings.

Jacksonville Detached Garage Setbacks

Jacksonville treats an unattached residential garage as an accessory structure. According to the city’s zoning guidance, accessory structures in most residential districts may be located in a side or rear yard and may be as close as five feet to the applicable side or rear property line.[1]

That five-foot figure should not be treated as a universal rule. The applicable requirement can change because of:

  • The property’s zoning district;
  • A Planned Unit Development or site-specific condition;
  • The height of the garage;
  • A corner or through-lot configuration;
  • Drainage, utility or access easements;
  • Floodplain or waterfront conditions;
  • Building-code requirements for walls and roof projections;
  • Private HOA requirements.

Garage Height Changes the Setback Rules

Jacksonville’s zoning FAQ says accessory structures using the reduced accessory setbacks may have a maximum height of 15 feet. An accessory structure taller than 15 feet must meet the same setbacks as the primary structure and cannot exceed the primary building’s height.[1]

The proposed height should therefore be determined before the garage location is finalized. A design that fits at 15 feet may no longer fit after adding a taller roof, storage loft or second story.

Separation From the House

The city’s guidance also states that an accessory structure must be at least five feet from the house to be considered accessory.[1]

Measure this separation carefully and show it on the site plan. Roof overhangs, eaves and projections may create additional building-code considerations even when the wall-to-wall dimension appears sufficient.

Use Verified Property Lines

Do not assume that a fence, hedge, curb, sidewalk or lawn edge represents the legal property boundary. Jacksonville advises that accurately determining a property line requires a survey.[1]

If the garage will be placed close to a setback limit or easement, an updated boundary survey from a Florida-licensed surveyor may be necessary.

Garage Size and Maximum Lot Coverage

Jacksonville’s zoning FAQ identifies a maximum accessory-structure size of 900 square feet. However, the garage must also comply with the property’s maximum lot coverage.[1]

Lot coverage is the percentage of the property covered by buildings and structures. It generally considers building footprints rather than second-story floor area.

A simplified calculation is:

Lot coverage = total covered building footprint ÷ total lot area × 100

For example, Jacksonville identifies 50% as the maximum coverage in the RLD-60 district. That example should not be applied to every property because maximum coverage varies by zoning district.

The calculation should normally account for the existing house, covered porches, attached structures, existing accessory buildings and proposed garage. Confirm which features count before finalizing the plan.

Plan Practical Vehicle Access

A garage may satisfy its zoning setbacks but still be difficult to use if the driveway is too narrow, poorly aligned or obstructed.

The site plan should demonstrate a practical connection between the garage and an approved street or alley. It should show:

  • The existing and proposed driveway width;
  • The driveway’s route across the property;
  • The garage-door width and orientation;
  • Available vehicle turning and backing area;
  • Gates, fences, trees and utility equipment;
  • Sidewalk and pedestrian crossings;
  • Existing or proposed driveway culverts;
  • The driveway connection within the public right-of-way.

When a Right-of-Way Permit May Be Needed

Jacksonville requires a right-of-way permit when work will disturb, excavate, block or place construction within a city road, right-of-way or city easement. The city notes that this permit may also be called a driveway, culvert or utility permit.[4]

A right-of-way plan may need to show:

  • The horizontal location of the work;
  • Relevant existing and proposed elevations;
  • Measurements tied to the property line, right-of-way line or road centerline;
  • Connections to existing utility or drainage structures;
  • Culvert size, elevation and positive drainage flow when applicable.

Work along an FDOT road, private road or non-city easement may be handled by a different authority. Confirm who controls the road before applying.

Why Stormwater Belongs on the Garage Site Plan

A detached garage adds a roof, and its access route may add new concrete, asphalt or pavers. These surfaces reduce the amount of rainwater that can soak into the ground and can redirect runoff toward neighboring lots, foundations, streets or drainage systems.

Jacksonville’s current checklist specifically requires the site or drainage plan to address:

  • Pre-construction drainage conditions;
  • Post-construction drainage conditions;
  • Finished-floor elevation;
  • Surface-water movement;
  • Stormwater-flow direction.

A well-prepared site plan can use elevation notes, grading information and drainage arrows to explain where water currently moves and how the proposed garage will affect that movement.

Important Stormwater Questions

  • Will the garage roof discharge water toward a neighboring property?
  • Will the driveway block an existing drainage swale?
  • Will water collect against the garage slab or house foundation?
  • Does the driveway cross an open roadside drainage system?
  • Is a new or extended culvert required?
  • Will fill be added to raise the garage pad?
  • Does the property contain a drainage easement?
  • Is an engineered drainage or grading plan required?

A basic plan can identify visible drainage features and proposed flow direction. Detailed elevations, drainage calculations or engineered stormwater design may require a licensed surveyor or professional engineer.

Flood Hazard Areas Require Extra Attention

Jacksonville properties within a special flood hazard area can face additional elevation and construction requirements.

The city’s residential checklist states that structures in a flood hazard area may need signed and sealed documentation identifying the Base Flood Elevation, Design Flood Elevation and proposed Finished Floor Elevation. It also identifies flood openings and flood-resistant materials as potential requirements for garages with enclosed areas below the required elevation.[3]

Check flood conditions early. Raising a garage to meet flood requirements can change:

  • The driveway slope;
  • Vehicle access;
  • Overall building height;
  • Steps or ramps;
  • Drainage patterns;
  • The amount of fill required.

Easements, Utilities and Septic Systems

Recorded easements can limit where a garage, foundation or driveway may be built. Common examples include drainage, utility and access easements.

The site plan should also identify wells and onsite sewage or septic systems when applicable. Jacksonville’s checklist specifically calls for well and septic-system locations to be shown on the site plan.[3]

Do not position the garage solely from an aerial image. Aerial photography can be useful for preliminary planning, but it is not a substitute for verified boundary, easement and utility information.

Submitting the Jacksonville Garage Permit

Jacksonville requires electronic permit submission through JaxEPICS. The city states that submitted documents must be in PDF format and may be reviewed by zoning, concurrency, development services, landscape and drainage staff.[5]

The general process is:

  1. Confirm the property’s jurisdiction and zoning.
  2. Check setbacks, height, size and lot coverage.
  3. Prepare the site and drainage plan.
  4. Prepare the required architectural and structural drawings.
  5. Obtain flood, septic, utility or right-of-way documentation when applicable.
  6. Upload the application and plans through JaxEPICS.
  7. Respond to review comments and submit revisions.
  8. Receive the permit before starting construction.
  9. Schedule the required inspections.

A Notice of Commencement is generally required when the total job cost exceeds $5,000. Jacksonville’s checklist states that the recorded notice must be received before an inspection is scheduled, although it does not delay permit issuance.[3]

Common Garage Site-Plan Problems

  • Using a five-foot setback without confirming the zoning district;
  • Measuring from a fence instead of the property line;
  • Omitting the garage height or roof overhangs;
  • Exceeding the 900-square-foot accessory-structure limit;
  • Exceeding the zoning district’s maximum lot coverage;
  • Placing the garage less than five feet from the house;
  • Providing insufficient driveway or turning space;
  • Blocking a swale or drainage easement;
  • Directing roof runoff toward a neighboring property;
  • Failing to show pre- and post-construction drainage;
  • Omitting a well or septic system;
  • Ignoring flood-hazard requirements;
  • Changing the garage dimensions between plan sheets;
  • Starting driveway or right-of-way work without the applicable permit.

Information to Gather Before Ordering a Site Plan

  • Property address and parcel number;
  • Existing boundary survey, if available;
  • Proposed garage length, width and height;
  • Preferred garage location;
  • Garage-door size and direction;
  • Existing and proposed driveway layout;
  • Known easements and utility locations;
  • Flood-zone information;
  • Well and septic-system locations;
  • Photos of the property and access route;
  • Any instructions received from the city, contractor or HOA.

Get a Clear Site Plan for Your Jacksonville Garage

Show the proposed garage, setbacks, driveway access, easements and stormwater-flow information in one easy-to-read plan.


Order a Basic Site Plan

Frequently Asked Questions

How close can a detached garage be to a Jacksonville property line?

In most Jacksonville residential zoning districts, an accessory structure no more than 15 feet high may be as close as five feet to a side or rear property line. Zoning, PUD, easement and site-specific requirements can change this distance, so verify the standard for the property.

What is the largest detached garage allowed?

Jacksonville’s zoning guidance identifies 900 square feet as the maximum accessory-structure size. The garage must also fit within the property’s maximum lot-coverage allowance.

How far must the garage be from the house?

The city states that an accessory structure must be at least five feet from the house to be considered accessory. Building-code requirements for walls, openings and projections may also apply.

Does the driveway need to appear on the site plan?

Yes. Jacksonville’s residential checklist includes the driveway among the features that should appear on the site and drainage plan. A right-of-way permit may also be required if the driveway work affects a city road, easement, culvert or public right-of-way.

Does the site plan need to show stormwater flow?

Yes. The city’s checklist specifically calls for pre- and post-construction drainage conditions, finished-floor elevation and surface or stormwater flow to be documented.

Is a basic site plan the complete permit package?

Not necessarily. The permit package may also require architectural plans, digitally signed and sealed structural plans, foundation and framing details, flood documentation, product approvals and other project-specific documents.

Official Sources


  1. City of Jacksonville – Zoning Frequently Asked Questions

  2. City of Jacksonville – Building Inspection Division FAQs

  3. City of Jacksonville – New Building, One- and Two-Family Checklist

  4. City of Jacksonville – Right-of-Way Permitting

  5. City of Jacksonville – Online Permit Submission

Information current as of September 2026 and provided for general guidance only. Requirements can change and vary by zoning district, jurisdiction and project scope. Confirm current requirements with the City of Jacksonville or the authority having jurisdiction before construction.