This information was put together for homes in unincorporated Palm Beach County. If the first 2 digits of your parcel ID (look in PAPA) are NOT 00 then you are in area that IS incorporated into a municipality and the rules of that city or town would apply.
The short answer is that in ANY residential (RE, RM, RS, RT or AR) district the Unified Land development Code Chapter 6 Article 18 allows for one to store 3 pieces of equipment on a property, ASIDE from registered cars & trucks. Of these 3 only 1 may be an RV, and all must owned by the occupant AND behind a 6′ opaque barrier. One car MAY be inoperable but it too must be behind the 6′ opaque barrier. The other equipement must be registered and insured.
This is the case for places like Palm Beach Country Estates and Jupiter Farms where the zoning is AR, or Agricultural Residential as well as places like Paradise Port where the zoning is RS or Residential Single Family.
In the unincorporated residential zoned areas of Palm Beach County (according to the rules anyway) boats, trailers campers and other such vehicles can NOT be stored between the street and the housing structure. They may be stored behind the front setback of the residence, in the side or rear yard areas, provided they are screened from surrounding property and streets with an opaque wall, fence or hedge a minimum of six feet in height (ULDC Article 6). One commercial vehicle may be parked on residential property provided it does not exceed the following requirements: vehicle is registered and licensed; used by a resident of the premises; gross weight, including load, does not exceed 12,500 pounds; height does not exceed 9 feet, including any load, bed or box; and total vehicle length does not exceed 26 feet (ULDC Article 6).
Recreational Vehicle = For the purposes of Art. 6, Parking, a truck, bus, trailer, pickup camper, pop-up camper, fifth wheel or other vehicle with or without motor power which has been converted or equipped with living or sleeping quarters and is designed and constructed to travel on public thoroughfares without a Special Permit in accordance with the provisions of F.S. § 316.550 of the Vehicle Code of the State of Florida. [Ord. 2019-005]
Sports Vehicle = for the purposes of Art. 6, Parking, any wheeled or tracked motorized vehicle designed or adapted to travel on public thoroughfares, public waterways, on unpaved thoroughfares, etc. without a Special Permit in accordance with the provisions of F.S. § 316.550 of the Vehicle Code of the State of Florida. [Ord. 2019-005]
Exemptions Stated in the code….
The following exemptions shall apply to parcels in residential districts, unless the parcel is vacant. [Ord. 2007-013]
1) Commercial Vehicle
One commercial vehicle of not over one ton rated capacity may be parked per dwelling unit, providing all of the following conditions are met: vehicle is registered or licensed; used by a resident of the premises; gross vehicle weight rating (gvwr) does not exceed 12,500 pounds; height does not exceed nine feet, including any load, bed, or box; and total vehicle length does not exceed 26 feet. [Ord. 2005-041]
2) Construction Vehicles
The general prohibitions above shall not apply to the temporary parking of construction vehicles or equipment engaged in work on private land in residential districts where construction is underway, for which a current and valid building permit has been issued by the Building Director and the building permit is displayed on the premises. [Ord. 2007-013]
3) Delivery and Service Vehicles
The general prohibitions above shall not apply to routine deliveries by tradesmen, or the use of trucks in making service calls, provided that time in excess of one hour is due to business deliveries or servicing. [Ord. 2007-013]
4) Emergency Repairs
The general prohibitions above shall not apply to a situation where a motor vehicle becomes disabled and, as a result of such emergency, is required to be parked in a residential district longer than two hours. Any prohibited motor vehicle shall be removed from the residential district within 24 hours, regardless of the nature of the emergency.
5) Outdoor Storage
A maximum of one recreational vehicle and any two of the following, or a maximum of three of any of the following, may be parked outdoors on a residential parcel with a residential unit:
sports vehicle or marine vessel with accompanying trailers, and trailers may be parked outdoors in a residential district provided that the vehicles are: [Ord. 2007-013] [Ord. 2019-005]
a) owned and used by a resident of the premises;
b) not parked in a required front setback or other area between the structure and the street, or on street except for the purpose of loading or unloading during a period not to exceed two hours in any 24 hour period; [Ord. 2007-013]
c) located in the side or rear yard and are screened from surrounding property and streets with an opaque wall, fence or hedge a minimum of six feet in height;
d) not used for living, sleeping or housekeeping purposes; and
e) operative and currently registered or licensed, as required by state or federal law.
f) vehicles or marine vessels on navigable waterways are exempt; and [Ord. 2007-013] [Ord. 2019-005]
g) one vehicle which does not meet the requirements above may be approved through ZAR process upon demonstration that: [Ord. 2018-002]
(1) The property owner, family member or legal tenant has a physical disability which requires a vehicle which cannot meet these requirements.
6) Indoor Storage
Vehicles, marine vessels and related trailers used for non-commercial purposes, whether licensed and operational or not, located in a fully enclosed garage or permitted roofed structure. [Ord. 2007-013] [Ord. 2019-005]
7) Unregistered or Unlicensed Vehicles
In addition to the indoor storage exception above, one vehicle which is unregistered or unlicensed may be kept on site provided the vehicle is completely screened from view from adjacent roads and lots. [Ord. 2007-013]
So, 1 RV plus 2 boats, or 3 boats, and all meet the other requirements as far as ownership, operative and registered and they must be behind a 6′ high wall, hedge or fence.