SEC. 207. DWELLING UNIT DENSITY LIMITS.
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(c)
Exceptions to Dwelling Unit Density Limits. An exception to the calculations
under this Section 207 shall be made in the following circumstances:
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Supervisors Mandelman; Ronen, Preston, Melgar, Peskin, Chan, Haney
BOARD OF SUPERVISORS
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(4)
Local Accessory Dwelling Unit Program: Accessory Dwelling Units
in Multifamily Buildings; Accessory Dwelling Units in Single-Family Homes That Do Not
Strictly Meet the Requirements in subsection (c)(6).
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(C) Controls on Construction. An Accessory Dwelling Unit regulated
by this subsection (c)(4) is permitted to be constructed in an existing or proposed building
under the following conditions:
(i) For lots that have four existing Dwelling Units or fewer or
where the zoning would permit the construction of four or fewer Dwelling Units, one ADU is
permitted; for lots that have more than four existing Dwelling Units or are undergoing seismic
retrofitting under subsection (c)(4)(F) below, or where the zoning would permit the
construction of more than four Dwelling Units, there is no limit on the number of ADUs
permitted,_; provided, however, that
(jj)__It-he Department shall not approve an application for
construction of an ADU where a tenant on the lot has been evicted pursuant to Administrative
Code Sections 37.9(a)(9) through (a)(12) and 37.9(a)(14) under a notice of eviction served
within 10 years prior to filing the application for a building permit to construct the ADU or
where a tenant has been evicted pursuant to Administrative Code Section 37.9(a)(8) under a
notice of eviction served within five years prior to filing the application for a building permit to
construct the ADU. This provisionsubsection (c)(4)(C)(ii) shall not apply if the tenant was evicted
under Section 37.9(a)(11) or 37.9(a)(14) and the applicant(s) either (A) have certified that the
original tenant reoccupied the unit after the temporary eviction or (B) have submitted to the
Department and to the Residential Rent Stabilization and Arbitration Board (Rent Board) a
declaration from the property owner or the tenant certifying that the property owner notified
the tenant of the tenant's right to reoccupy the unit and the tenant chose not to reoccupy it.
Supervisors Mandelman; Ronen, Preston, Melgar, Peskin, Chan, Haney
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(iii) Prior to submitting an application to construct an ADU under this
subsection (c){4), the property owner shall file with the Rent Board a written declaration, signed under
penalty of perjury, demonstrating that the project will comply with the requirements of Administrative
.Code Sections 37.2{r) and 37.9 relating to severance, substantial reduction, or removal ofa housing
service. The Rent Board shall determine the form and content ofsaid declaration, which shall include
the following information: (1) a description of any housing services supplied in connection with the use
or occupancy of any units on the subject property that are located in the area of the property or
building where the ADU would be constructed; (2) whether construction o(the ADU would result in the
severance, substantial reduction, or removal of any such housing services,· and (3) whether any of the
just causes for eviction under Administrative Code Section 37.9(a) would apply. The property owner
shall also file a copy of the notice required under Section 207(c){4)(J) with the declaration.
(iv) Tenants at the subject property may contest the information in the
declaration required by subsection 207 (c){4){C){iii) by petitioning for a written determination from the
Rent Board verifying the presence and defining characteristics of the housing service or services in
question, and whether any such housing services would be severed, substantially reduced, or removed
by the project as proposed. Petitions must be filed with the Rent Board within 30 calendar days af'ter
the notice required under subsection 207(c){4)(J) has been provided. Jfno such petition is timely filed,
the Rent Board shall promptly transmit the declaration to the Planning Department. If any such
petition is timely filed, the Rent Board shall endeavor to transmit the declaration and its final written
determination on the petition to the Planning Department within 90 calendar days of receipt of said
petition. The Department shall not approve an application to construct an ADU under this subsection
(c){4) unless (1) the Rent Board has transmitted the declaration and final written determination
required by subsections (c){4){C)(iii) and (c){4){C)(iv), and (2) the materials transmitted by the Rent
Board indicate that construction of the ADU would not result in the severance, substantial reduction,
or removal without just cause of any tenant housing service set forth in Administrative Code Section
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37.2(r) that is supplied in the area oft he property or building where the ADU would be constructed,
unless the property owner demonstrates that the tenant supplied with that housing service has given
their express written consent for the severance, substantial reduction, or removal ofthe housing
service.
(#y.) Except as provided in subsections (mvi) and (iVjj_) below, an
Accessory Dwelling Unit shall be constructed entirely within the buildable area of an existing
lot, provided that the ADU does not exceed the existing height of an existing building, or within
the built envelope of an existing and authorized stand-alone garage, storage structure, or
other auxiliary structure on the same lot, as the built envelope existed three years prior to the
time the application was filed for a building permit to construct the ADU. For purposes of this
provision subsection (c)(4)(C)(v), the "built envelope" shall include the open area under a
cantilevered room or room built on columns; decks, except for decks that are supported by
columns or walls other than the building wall to which they are attached and are multi-level or
more than 10 feet above grade; and lightwell infills provided that the infill will be against a
blank neighboring wall at the property line and not visible from any off-site location; as these
spaces existed as of July 11, 2016. An ADU constructed entirely within the existing built
envelope, as defined in this subsection-(H), along with permitted obstructions allowed in
Section 136(c)(32), of an existing building or authorized auxiliary structure on the same lot, or
where an existing stand-alone garage or storage structure has been expanded to add
dormers, is exempt from the notification requirements of Section 311 of this Code unless the
existing building or authorized auxiliary structure on the same lot is in an Article 10 or Article
11 DistrictL in which case the notification requirements will apply. If an ADU will be constructed
under a cantilevered room or deck that encroaches into the required rear yard, a pre-
application meeting between the applicant and adjacent neighbors for all the proposed work is
required before the application may be submitted.
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(i-ii:vi) When a stand-alone garage, storage, or other auxiliary
structure is being converted to an ADU, an expansion to the envelope is allowed to add
dormers even if the stand-alone garage, storage structure, or other auxiliary structure is in the
required rear yard.
(i:Vjj_) On a corner lot, a legal stand-alone nonconforming garage,
storage structure, or other auxiliary structure may be expanded within its existing footprint by
up to one additional story in order to create a consistent street wall and improve the continuity
of buildings on the block.
(viii) An Accessory Dwelling Unit shall not be constructed using
space from an existing Dwelling Unit except that an ADU may expand into habitable space on
the ground or basement floors provided that it does not exceed 25% of the gross square
footage of such space. The Zoning Administrator may waive this 25% limitation if (el) the
resulting space would not be usable or would be impractical to use for other reasonable uses
included but not limited to storage or bicycle parking or(&£) waiving the limitation would help
relieve any negative layout issues for the proposed ADU.
('vi,r) An existing building undergoing seismic retrofitting may be
eligible for a height increase pursuant to subsection (c)(4)(F) below.
(Wi:&) Notwithstanding any other provision of this Code, an
Accessory Dwelling Unit authorized under this Section 207subsection (c)(4) may not be merged
with an original unit(s).
(Wiixi) An Accessory Dwelling Unit shall not be permitted in any
building in a Neighborhood Commercial District or in the Chinatown Community Business or
Visitor Retail Districts if it would eliminate or reduce a ground-story retail or commercial space,
unless the Accessory Dwelling Unit is a Designated Child Care Unit, as defined in Section
102, and meets all applicable standards of Planning Code Section 414A.6(e).
Supervisors Mandelman; Ronen, Preston, Melgar, Peskin, Chan, Haney
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{J)
Notification. Prior to submitting an application to construct an
ADU under this subsection (c)(4), the property owner shall cause a notice describing the proposed
project to be posted in an accessible common area of the building for at least 15 calendar days prior to
submitting an application to construct an ADU, and shall cause said notice to be mailed or delivered to
each unit (including unauthorized units) at the subject property, also at least 15 calendar days prior to
submitting the application. The property owner shall submit proof of these notices to the Planning
Department as part of the application to construct an ADU These notices shall have a format and
content determined by the Zoning Administrator, and shall generally describe the project, including the
number and location o[the proposed ADU(s), and shall include a copy o[the written declaration
required by subsection (c){4)(C)(iii). These notices shall also include instructions on how a tenant may
petition the Rent Board for a written determination on the declaration as set forth in subsection
(c)(4){C)(iii), including the deadline for filing such petition, which shall be 30 calendar days after the
notice has been provided. These notices shall also describe how to obtain additional information
regarding the project and shall provide contact information for the Planning Department that complies
with the requirements of the Language Access Ordinance, Chapter 91 of the Administrative Code, to
provide vital information about the Planning Department's services or programs in the languages
spoken by a Substantial Number of Limited English Speaking Persons, as defined in Chapter 91.
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Section 3. Chapter 37 of the Administrative Code is hereby amended by revising
Sections 37.2 and 37.9, to read as follows:
