Little Atherton’s Big Housing Market – How Small Homes Strike a Balance

Atherton, CA

An unincorporated area of San Mateo County, the tiny town of Atherton has a major market for mansions.  In fact, Atherton is Atherton, CAreportedly the most affluent zip code in the nation and is home to Silicon Valley’s tech darlings like Facbook’s Sheryl Sandberg and Google’s Eric Schmidt.  For this reason,  Planning for the required number of housing units has proved especially difficult for this Peninsula community with their limited space for new construction.  By utilizing the expansive lots and existing infrastructure of their single family homes, these accessory dwellings are a practical solution.  Other benefits of these small homes include the valuable opportunity for multigenerational living, supplemental income for owners and affordable housing for renters. Here are a few of the requirements related to accessory dwelling units in Atherton, though you’ll have to  review the municipal code for the most accurate definition, requirements, variances and exceptions:

  • The second unit shall not exceed 1,200 sq ft (doubled in 2010 from previous maximum of 600 sq ft)
  • May enroach into the side and rear yard setbacks by not more than twenty percent of the required setback
  • Maximum height is thirty feet
  • Parking requirements are 1 space per number of bedrooms in second unit

In addition, the owner must occupy either (or both) the main house or second unit.  Verify with the Planning Division to confirm your requirements in your zoning district. Learn more about accessory dwellings by learning about our process, read our client stories or contact us today if you are interested in building your own backyard cottage.

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