Woodside has adopted Chapter 153.211 in its Municipal Code. to describe its ADU Regulations.


   All Accessory Dwelling Units, whether internal, attached to, or detached from the Main Dwelling unit, shall conform to the following requirements:
   (A)   Requirements applicable to all Accessory Dwelling Units:
      (1)   Building and Fire Safety.  Conformance with all applicable building, housing, zoning, and site development laws, codes, and regulations shall be required, as applicable to Accessory Dwelling Units.  Accessory Dwelling Units shall not be required to provide fire sprinklers if they are not required for the primary residence and may employ alternative methods for fire protection.
      (2)   Parking and Driveway Access.  Off-road parking spaces shall be provided in accordance with the requirements of §§ 153.221 through 153.225, as applicable to Accessory Dwelling Units; and specifically as follows:
         (a)   Parking Requirements.  Parking requirements for Accessory Dwelling Units shall be one parking space per Accessory Dwelling Unit.  Off-street parking shall be permitted in Setback areas in locations determined by the Town, or through tandem parking, unless specific findings are made that parking in Setback areas or tandem parking is not feasible based upon specific site or regional topographic or fire and life safety conditions.
         (b)   Parking Waiver.  Parking is not required in the following instances:
            1.   The Accessory Dwelling Unit is located within one-half mile of public transit, including transit stations and bus stations;
            2.   The Accessory Dwelling Unit is located within an architecturally and historically significant historic district;
            3.   The Accessory Dwelling Unit is part of the existing primary residence or an existing Accessory Structure;
            4.   The Accessory Dwelling Unit is located in an area where parking permits are required, but are not offered to the occupant of the Accessory Dwelling Unit; or
            5.   The Accessory Dwelling Unit is located within one block of a car share vehicle.
         (c)   Replacement Parking:  When a Garage, Carport, or covered parking Structure is demolished or converted in conjunction with the construction of an Accessory Dwelling Unit, the Town requires that those parking spaces be replaced.  The replacement spaces may be located in any configuration on the same Lot as the Accessory Dwelling Unit, including but not limited to, as covered spaces, uncovered spaces, or tandem spaces, or by the use of mechanical automobile parking lifts.
         (d)   Driveway Access.  Any Lots that have two or more existing permitted Driveways shall use the Principal Access Driveway as the primary access to any proposed Accessory Dwelling Unit.  Any additional existing Driveways other than the Principal Access Driveway shall not be used as the primary access for any proposed Accessory Dwelling Unit.  Pursuant to Municipal Code § 151.44, a Second Driveway Exception shall not be granted if the second Driveway is the primary access for a proposed Accessory Dwelling Unit.
      (3)   Design Review.  All plans for Accessory Dwelling Units shall be subject to review and approval by the Planning Director.  In addition, all plans for the new construction or exterior modification of Accessory Dwelling Units shall also, prior to the issuance of any permit, be subject to review according to § 153.912.  In considering architectural review, the Planning Director shall be required to find that the Accessory Dwelling Units are subordinate to the Main Dwelling, and compatible with the neighboring property and Uses in Height, bulk, location, appearance, color, materials, and landscaping.
      (4)   General Accessory Structure Regulations.  All requirements related to Accessory Buildings contained in this Chapter, including, but not limited to: Height, Setbacks, Floor Area, lot coverage, and landscaping shall apply.
      (5)   Number of Accessory Dwelling Units Allowed.  No more than two Accessory Dwelling Units, including Accessory Dwelling Units in Barns, are permitted on a Parcel.  For Parcels equal to or greater than 1.0 acre in size, but less than 1.5 acres in size, a maximum of one detached and one attached Accessory Dwelling Units shall be permitted.  For Parcels less than 1.0 acre in size, no more than one Accessory Dwelling Unit accessory living quarters, whether attached or detached, shall be permitted.  In the R-1 District, no more than one Accessory Dwelling Unit is permitted, and detached Accessory Dwelling Units may only be permitted if the Lot Area is at least 20,000 square feet.
      (6)   Attached Accessory Dwelling Units.  The Floor Area of an attached Accessory Dwelling Unit shall not exceed 50% of the size of the main residence, including the Accessory Dwelling Unit, or 1,500 square feet, whichever is less.
      (7)   Detached Accessory Dwelling Units.  The Floor Area of a detached Accessory Dwelling Unit, including the Floor Area of any attached Garage, shall not exceed 1,500 square feet.
      (8)   Basement Accessory Dwelling Units.  Basement area used for an Accessory Dwelling Unit, or a portion thereof, shall be limited to the unit sizes prescribed in divisions (A)(6) and (A)(7) of this section.
      (9)   Rental Accessory Dwelling Units.  Accessory Dwelling Units which are rented shall not be rented for less than 30 consecutive days.
      (10)   Existing Garages converted to Accessory Dwelling Units.  No Setback shall be required for an existing Garage that is converted to an Accessory Dwelling Unit, and a Setback of no more than 5 feet or the Setback of the existing Garage, whichever is greater, from the side and Rear Lot Lines shall be required for an Accessory Dwelling Unit that is constructed above a Garage, as long as access and egress requirements, as prescribed by the Building Code and Municipal Code Height requirements are met.


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