Professional and medical office district. The only residential use is single-family dwellings originally built as single-family.
What's allowed in CO
| Use | Status | What that means |
|---|---|---|
| Single-family home | Limited | allowed only in a restricted form (original-use only, upper floors only, specific lot types); see notes |
| Duplex / two-family | Not allowed | not allowed (excluded by the use list or by definition) |
| Townhouse | Not allowed | not allowed (excluded by the use list or by definition) |
| Multi-family (3+ units) | Not allowed | not allowed (excluded by the use list or by definition) |
| Accessory dwelling unit (ADU) | Accessory only | allowed only as an accessory use under conditions (e.g. COJ ADU rule §656.403(g)) |
Lot and building standards
| Standard | Value | Code section |
|---|---|---|
| Minimum lot area (first units) | 6,000 sq ft | §656.311.A.II(d)(2) |
| Units covered by that minimum | 1 | |
| Lot area per additional unit | — | |
| Maximum density | — | |
| Minimum lot width | 60 ft | §656.311.A.II(d)(1) |
| Maximum height | 35 ft | §656.311.A.II(g) |
| Maximum lot coverage | 50% | §656.311.A.II(e) |
How many units can a lot hold in CO?
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 | 1 | lot 5,000 sqft is under the 6,000 sqft minimum (nonconforming) |
| 7,500 sq ft | 1 | 6,000 sqft minimum lot for 1 unit(s) |
| 10,000 sq ft | 1 | 6,000 sqft minimum lot for 1 unit(s) |
| 15,000 sq ft | 1 | 6,000 sqft minimum lot for 1 unit(s) |
| 21,780 sq ft (½ acre) | 1 | 6,000 sqft minimum lot for 1 unit(s) |
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
§656.311.A.II(a)(6): 'single family dwellings which were originally constructed as single family dwellings' only. No new residential construction. Lot 60 ft / 6,000 sq ft (§656.311.A.II(d)). Coverage 50% (§656.311.A.II(e)). Height 35 ft, unlimited if side yards increase 1:1 above 35, but never above 35 ft next to a single-family use or district (§656.311.A.II(g)). Whether an ADU (§656.403(g)) is available on a grandfathered single-family home in CO has not been confirmed.
Compiled from the official code text (§656.311). Zoning changes by ordinance and parcels can be rezoned — confirm on the official zoning map and with Jacksonville planning staff before you rely on it. Not legal advice.