I just found this for ya, permitted uses of residential areas in the Pleasanton Municipal Code. at
http://qcode.us/codes/pleasanton/
18.32.030 Permitted uses.
The following uses shall be permitted in the R-1 districts:
A. One-family dwellings in which not more than two guest sleeping rooms may be used for lodging or boarding.
B. Raising of fruit and nut trees, vegetables and horticultural specialties.
C. Temporary subdivision sales offices conducted in accord with the regulations prescribed in Chapter 18.116 of this title.
D. Accessory structures located on the same site with a permitted use, including private garages and carports, one guesthouse or accessory living quarters without a kitchen, storehouse, garden structures, greenhouses, recreation rooms and hobby areas within an enclosed structure and the following accessory structures and uses located on the same site with a permitted use or with a conditional use which has been granted a use permit in accord with the provisions of Chapter 18.124 of this title:
1. Emergency standby electricity generator, fuel cell, and/or battery facilities provided that the facilities shall be tested from 8:00 a.m. to 5:00 p.m. Monday through Friday or from 10:00 a.m. to 12:00 noon on Saturday or Sunday only; the facilities shall not be tested for more than one hour during any day and no testing shall be on federal holidays or on Spare The Air Days in Alameda County;
2. Portable, temporary electricity generator, fuel cell, or battery facilities in the R-1-40,000 district;
3. Photovoltaic facilities.
E. Private stable for the keeping of two horses on a site not less than 40,000 square feet in area, except that one additional horse may be kept for each additional 40,000 square feet of site areas, provided that no stable shall be located closer than 50 feet to any property line, closer than 50 feet to any dwelling on the site, or closer than 100 feet to any other dwelling.
F. Household pets including up to six female chickens.
G. Small family daycare homes.
H. Second units meeting the requirements in Chapter 18.106 of this title. (Ord. 1930 § 1, 2006; Ord. 1885 § 2, 2003; Ord. 1880, 2003; Ord. 1636 § 3, 1994; Ord. 1126 § 5, 1984; prior code § 2-6.13)