Sunnyvale irrigation sprinkler permit notes and permits:
I would recommend trying the online permit process. If you have to apply in person, print out the requirements in the first link above and take it with you. If you show that you have every intention of meeting requirements the people signing off the permit application don't feel like they are sticking their neck out.
In general permits can be a headache because most enforcement is done as the result of a complaint. Many people don't get permits and don't run into problems. If you establish a history of getting permits it can make a future sale of your home easier and potentially return a little money for your efforts.
Sunnyvale home values at http://julianalee.com/sunnyvale/sunnyvale-statistics.htm
Recent Sunnyvale real estate sales at http://julianalee.com/sunnyvale/sunnyvale-home-sales.htm
Top 2 agent nationwide at Keller Williams Realty, the nations largest
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Over 1,000 homes sold in Santa Clara County and San Mateo County