If you have not had the deck built with the certification of a licensed engineer or architect — and you did not receive any documentation on the construction when you bought your home — it would be wise to invest in an inspection. Make sure to hire a licensed professional who has experience assessing structures like decks for earthquake safety.

If you are planning to build your own deck, be aware that state law mandates you hire a licensed architect or engineer for certain projects. For more information, visit the Information Desk of San Francisco's Department of Building Inspection (DBI) at 1660 Mission Street, First Floor. You can also call the DBI at (415) 558-6088 or consult their online guide, How to Obtain a Permit for 1 & 2 Family Dwellings. Though it's likely that you will be allowed to construct a deck without the aid of a licensed professional, it is better to err on the side of caution, both in following the law and in building as safely as possibly. In any case, you must contact the DBI to obtain a permit before commencing with the work.

Also, see the AskTheBuilder.com Web site for information on the construction and maintenance of decks.