The regulations set forth in Sections 17.26.020 through 17.26.090 shall apply to all No. 4 districts. The rural residential zoning district is established to provide a larger lot residential setting in a residential area.

Permitted uses in the R-4, rural residential district are as follows:

1. One-family detached dwellings;
2. Home occupations, as permitted in accordance with provisions of Section 17.08.390 of this chapter;
3. Parks and forest preserves.

The following uses may be allowed by special use permit in accordance with the provisions of Chapter 17.48 of this title:

1. Non-profit and charitable institutions;
2. Private clubs or lodges, except those the chief activity of which is a service customarily carried on as a business;
3. Churches, rectories, seminaries, convents, monasteries and similar religious institutions;
4. Day nursery schools;
5. Daytime or nighttime care centers;
6. Educational institutions;
7. Golf courses, public or private;
8. Off-street parking areas;
9. Offices, business and professional;
10. Planned community developments;
11. Public service uses, including but not limited to:
    Filtration plant;
    Sewage treatment plant;
    Police and fire stations;
    Telephone exchange;
    Electric substations and booster stations;
    Other governmental uses.
12. Radio and television towers, commercial;
13. Bed and breakfast inns.
14. Short-term Rental Properties as defined in Section 17.08.730.
    

Lot size requirements fare as follows:

1. Every principal permitted use in this section shall be located on a tract of land having an area of not less than one acre and a width at the established building line of not less than one hundred twenty-five feet.
2. Every special use permitted in the R-4 District shall be located on a tract of land the minimum size of which shall be specified at the time a special use permit is authorized.

No building shall be erected or enlarged unless the following yards are provided and maintained in connection with such building, structure or enlargement:

1. Front Yard. A front yard equal to at least one-half the right-of-way of the street on which the lot fronts. However, in no case shall the front yard be less than fifty feet.
2. Side Yard. A side yard on each side of the lot of not less than twenty feet, except, where a side yard adjoins a street, the minimum width shall be increased to one-half the right-of-way of the adjoining street.
3. Rear Yard. A rear yard shall be not less than seventy-five feet.

In the R-4 district, no building shall be erected or altered to a height in excess of thirty-five feet or two and one-half stories.

All buildings including accessory buildings shall not cover more than twenty percent of the net site area.

Accessory buildings shall be located on the same lot with the principal building, shall not be less than ten feet from the principal building if not attached, shall not exceed fifteen feet in height, nor be less than six feet from the side or rear lot line.

Horses may be allowed under the following requirements:

1. Keeping of a horse requires a minimum two-acre lot. One additional acre required for each additional horse;
2. If property abuts to any other zoning district a one hundred-foot buffer will be required between properties;
3. With the exception of cats and dogs, all other outside livestock is prohibited unless a special use permit is granted.