walk score http://www.walkscore.com - this website scores addresses based on their walkability to things like shops, restaurants, parks and libraries.
resident school identifier http://rsi.lausd.net/ResidentSchoolIdentifier/ - this is the go-to website to find out what LAUSD school your address is zoned for.
culver city schools http://www.ccusd.org: - culver city has its own school district. this link provides information about the culver city unified school district, including a detailed map of school boundaries.
santa monica schools http://www.smmusd.org/StudentServices/district_map.html if you live in or are looking in santa monica or malibu, this website will tell you everything you need to know about the santa monica/ malibu unified school district.
california schools guide Projects.latimes.com/schools - Test scores, demographics, enrollment & general information
curbed la http://la.curbed.com - the go-to site for everything real estate in los angeles.
megan's law http://www.meganslaw.ca.gov - megan's law allows homeowners and buyers to search for registered sex offenders in close proximity to any address.
crime maps http://www.lapdonline.org/crime_mapping_and_compstat - this map provides detailed crime statistics for the areas within a certain radius to a particular address.
us census bureau factfinder http://factfinder2.census.gov/legacy/aff_sunset.html?_lang=en - the census bureau can give information regarding the demographics of a particular neighborhood.
the mls www.themls.com - the best website for searching local housing inventory.
usps change of address form https://moversguide.usps.com/icoa/icoa-main-flow.do?execution=e1s1&_flowId=icoa-main-flow&referral=USPS - don't forget to have your address changed and your mail forwarded before you move!
office of historic resources www.preservation.lacity.org - Information and applications to mills act, as well as info on hpoz and boundary maps to historic zones in la including west adams, Harvard heights, Lafayette square, Spaulding square, etc.