A. Permitted uses are as follows:

(1) All uses permitted in the Residential Districts.

(2) Dwelling on the premises for a night watchman or janitor.

(3) Cafeteria on the premises for use by employees and not for the general public.

B. Permitted uses up to fifty thousand (50,000) square feet are as follows:

(1) Office-type trailer or mobile home used as business quarters for thirty (30) days or fewer in a year.

(2) Retail sales and services which do not involve manufacturing on the premises.

(3) Retail sales and services involving manufacturing of products, the majority of which will be sold on the premises to consumers, with not more than four (4) persons engaged in manufacturing operations.

(4) Newspaper, job printing and publishing.

(5) Office, bank, office building.

(6) Hotel or motel, restaurant (excluding drive-through food service establishments).

(7) Clinic or medical testing laboratory.

(8) Automotive service, gasoline station or repair garage, automotive sales.

C. Uses permitted by special permit are as follows:

(1) All uses allowed in Subsection B that exceed fifty thousand (50,000) square feet.

(2) Accessory apartment.

(3) Boat livery, cemetery, children's camp, golf course, private nonprofit membership club, public utility, riding stable, ski tow.

(4) Hospital, nursing home, home for the aged.

(5) Private school, nursery or kindergarten.

(6) Veterinarian, animal hospital, dog kennel.

(7) Conversion of a one-family house in existence for two (2) years or longer to a two-family dwelling, on a lot with a minimum of fifteen thousand (15,000) square feet.

(8) Mobile home or travel trailer used as a dwelling or business quarters for more than thirty (30) days in a year.

(9) Multifamily housing for the elderly, owned by a public or a nonprofit community housing organization.

(10) Private garage or parking for more than three (3) cars or more than one (1) truck or other commercial vehicle.

(11) Indoor recreation, athletic or exercise facility; theater for cultural arts.

(12) Sale or storage of fuel, lumber, building materials and equipment, contractors yard.

(13) Hazardous waste storage and disposal facilities, other than small generators, as defined by the Environmental Protection Agency and the Commonwealth of Massachusetts, except that a special permit may be issued for such a facility upon approval by the appropriate federal and state agencies, review and comment by the Southborough Board of Health, Conservation Commission, Planning Board and Fire and Police Chiefs, following a duly advertised public hearing and in accordance with the Hazardous Waste Facilities Siting Law.

D. Prohibited uses. All uses which are not listed above, legally nonconforming or otherwise allowable by the provisions of the zoning regulations are prohibited.

E. Development standards are as follows:

(1) Minimum lot area: forty-three thousand five hundred sixty (43,560) square feet [minimum twenty thousand (20,000) square feet exclusive of wetlands].

(2) Minimum frontage: two hundred (200) feet.

(3) Minimum setbacks:

(a) Front: fifty (50) feet; seventy-five (75) feet if on Route 9.

(b) Rear: fifty (50) feet.

(c) Side: fifty (50) feet.

(d) Other street: twenty-five (25) feet; thirty-seven and one-half (37 1/2) feet if on Route 9.

(4) Maximum height: forty-five (45) feet, three (3) stories.

(5) Maximum floor area ratio: sixty-hundredths (.60).

(6) Residential dwellings. Residential dwellings in the Highway Business District must comply with RB District standards.