Cedar Point and Sawpit Laws: One House Per Acre, Because of the Evacuation Route

TL;DR: The Cedar Point-Sawpit Zoning Overlay limits housing density to one dwelling unit per net acre in a rural stretch of far northeast Jacksonville. “Net acre” means land above the jurisdictional wetland boundary, so wetlands don’t count toward your acre. City Council’s stated reasoning was evacuation: the route is a dead end running roughly 8.72 miles, and most of the overlay area sits inside the city’s Adaptation Action Area for storm surge and flooding.

The short answers

What’s the density limit?
One dwelling unit per one net acre of land.

What counts as a “net acre”?
The area of land above the jurisdictional wetland boundary, as determined by the state and federal agencies responsible for that determination. Wetlands don’t count.

Why did the city cap it?
To protect a unique rural section of Jacksonville from overdevelopment, and specifically to help with evacuations during a hurricane or fire emergency.

How long is the evacuation route?
Cedar Point Road from Boney Road east is a dead end running about 4.72 miles. Continuing to Sawpit Road and the northern end of Black Hammock Island is also a dead end, at roughly 8.72 miles total.

Is the area at flood risk?
Most of the land in the overlay falls within the city’s Adaptation Action Area boundary, which accounts for Category 3 storm surge and FEMA’s 500-year flood plain.

What about small lots that already existed?
Lots legally created and existing as of July 1, 2021 that don’t contain at least one net acre of developable non-jurisdictional uplands are addressed separately in the code regarding nonconforming status.

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Most zoning fights are about aesthetics. This one is about whether people can get off a road when a hurricane is coming.

The Cedar Point-Sawpit Zoning Overlay covers a rural stretch of far northeast Jacksonville near Black Hammock Island, and City Council created it in 2021 with an unusually concrete justification written into the code itself.

For how overlays work generally, see the county-wide ordinance guide. For the neighboring island’s separate rule, see Black Hammock Island.

The rule: one home per net acre

The overlay’s core provision is a density cap. One dwelling unit per one net acre of land.

The definition of “net acre” is where this gets teeth. It means the area of land above the jurisdictional wetland boundary, as determined by the state and federal agencies tasked with making that determination.

In an area this marshy, that distinction changes everything. A ten-acre parcel that’s mostly wetland might yield very few buildable units. Your acreage on paper and your net acreage under this overlay can be dramatically different numbers, and only the second one counts.

The stated purposes go beyond density:

• Protect the area from overdevelopment in a unique rural section of the city
• Protect and enhance the area’s aesthetic and physical appearance
• Improve property values
• Promote an environment that’s visually appealing and safe for all modes of transportation

The evacuation math

This is the part that makes the overlay unusual, because the code spells out the reasoning in measured miles.

Cedar Point Road, starting at Boney Road and heading east, is a dead-end road roughly 4.72 miles long. Continue from Cedar Point Road onto Sawpit Road and out to the northern end of Black Hammock Island, and you’re on a dead end of approximately 8.72 miles.

One way in. One way out. Nearly nine miles of it.

The code states plainly that limiting density to one dwelling unit per net acre will help with evacuations in the event of a hurricane or fire emergency. Every additional household on that route is another vehicle in a single-file line during a mandatory evacuation.

That’s a rare thing to find in a zoning code. Most density limits are justified by character, infrastructure capacity, or comprehensive plan consistency. This one is justified by how many cars fit on a dead-end road during a storm.

The flood risk layer

The second justification is climate exposure, and the city was specific about the standard it used.

The city’s Adaptation Action Area boundary accounts for Category 3 storm surge and FEMA’s 500-year flood plain as of 2019. According to the code’s findings, most of the land within the Cedar Point-Sawpit Zoning Overlay falls inside that boundary, and is at risk for more frequent and intense storm surge along with sea level rise.

So the two rationales reinforce each other. It’s a hard-to-evacuate area that’s also more likely to need evacuating.

What surrounds it

Understanding the setting explains why residents fought for this.

The area sits amid an unusually dense concentration of protected land. The Timucuan Ecological and Historic Preserve surrounds and contains parts of Black Hammock Island and the agricultural land along Cedar Point Road. Pumpkin Hill Creek Preserve State Park is nearby. Bogey Creek Preserve on Cedar Point Road came from a project funded through the North Florida Land Trust. Cedar Point itself, roughly 400 acres at the south end of Black Hammock Island, is managed by the National Park Service and has layered history running from the Mocama through a Spanish mission, an antebellum plantation, and an early 20th century fish camp.

Development pressure has been pushing outward toward it for years, with subdivisions extending down Cedar Point Road.

The gap worth knowing about

Here’s the detail that matters if you’re following development in the area.

An overlay only governs land inside its boundary. In at least one instance, a proposed development site along Cedar Point Road was specifically not included in the overlay after the property owner challenged it, which meant the density limitation didn’t apply to that site. Reporting at the time described a project of roughly 48 to 49 acres with close to 90 homes.

The practical lesson: don’t assume a parcel near Cedar Point Road is covered. Boundaries were contested during adoption, and exclusions exist. Verify the specific parcel.

Quick win

If you own or are buying land in this area, get the wetland determination before you get excited about acreage.

Your buildable unit count runs off net acres, meaning uplands above the jurisdictional wetland line as determined by state and federal agencies. Not your deed acreage, not what the listing says. On marsh-adjacent land the difference can be most of the parcel.

Second, confirm in writing whether the specific parcel sits inside the overlay boundary. Given that at least one site was carved out during adoption, “it’s on Cedar Point Road” is not the same as “it’s in the overlay.”

The overlay dates to 2021 and boundaries have been contested. Confirm current parcel status, net acre calculations, and wetland determinations with the City of Jacksonville and the relevant state and federal agencies before making any decisions.