Multi-family district west of 3rd St (A1A): 5,000 sq ft for the first two units plus 2,000 sq ft per additional unit, max 20 du/ac.
What's allowed in JRM-1
| Use | Status | What that means |
|---|---|---|
| Single-family home | Allowed | listed as a permitted use |
| Duplex / two-family | Allowed | listed as a permitted use |
| Townhouse | Allowed | listed as a permitted use |
| Multi-family (3+ units) | Allowed | listed as a permitted use |
| Accessory dwelling unit (ADU) | By exception | needs a zoning exception / conditional use / special exception / use-by-exception (public hearing) |
Lot and building standards
| Standard | Value | Code section |
|---|---|---|
| Minimum lot area (first units) | 5,000 sq ft | |
| Units covered by that minimum | 2 | |
| Lot area per additional unit | 2,000 sq ft | |
| Maximum density | 20 units/acre | |
| Minimum lot width | 75 ft | |
| Maximum height | 35 ft | |
| Maximum lot coverage | 65% |
How many units can a lot hold in JRM-1?
Applying the district's lot-area and density rules (the stricter one wins) to typical lot sizes:
| Lot size | Max units | Rule that limits it |
|---|---|---|
| 5,000 sq ft | 2 | 5,000 sqft for the first 2 unit(s) + 2,000 sqft per additional |
| 7,500 sq ft | 3 | 5,000 sqft for the first 2 unit(s) + 2,000 sqft per additional |
| 10,000 sq ft | 4 | 5,000 sqft for the first 2 unit(s) + 2,000 sqft per additional |
| 15,000 sq ft | 6 | 20 units per acre |
| 21,780 sq ft (½ acre) | 10 | 5,000 sqft for the first 2 unit(s) + 2,000 sqft per additional |
Multi-unit numbers only matter where duplexes or multi-family are allowed above. In Jacksonville the Future Land Use Map category can cap density further, and overlays (Riverside/Avondale, San Marco, Springfield and others) can change the numbers.
Notes from the code
Multi-family (§34-614(e)(3)): 5,000 sq ft plus 2,000 sq ft per unit over two, gross density at most 20 du/ac; 75 ft wide; 65% coverage; 35 ft. Townhouse, up to 4 units per building (§34-614(e)(2)): 6,000 sq ft for the first two units plus 3,000 per additional; 25 ft per unit. Single-family: 5,000 sq ft / 50 ft. A 'multiple family dwelling' is a structure with 2+ units (§34-300), so duplexes fall under multi-family. ADUs are a conditional use, on the same parcel as a single-family dwelling only (§34-614(d)(18)). Citywide 35-ft height cap: Jacksonville Beach Charter §52(2)(a) ('no new building height shall exceed thirty-five (35) feet').
Compiled from the official code text (JB LDC §34-614). Zoning changes by ordinance and parcels can be rezoned — confirm on the official zoning map and with Jacksonville Beach planning staff before you rely on it. Not legal advice.