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Grand Terrace · Building on your lot

Lot splits under SB 9 in Grand Terrace

Grand Terrace's own rules on lot splits under sb 9, with the code text for every value, and the state law underneath.

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Each rule below links to the section of the Grand Terrace Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Grand Terrace's code says

Grand Terrace code What Grand Terrace's code adds
How the lot may be divided
  • Neither new parcel may be smaller than 40% of the original lot area.
    Applies: Urban lot split (SB 9).
    § 17.30.040 · code text
    Neither resulting parcel shall be smaller than 40 percent of the lot area of the original parcel proposed for subdivision;
Unit size
  • No maximum; standards waived so each unit reaches at least 800 square feet; second unit not larger than main home.
    Applies: SB 9 second units and two-unit developments.
    § 18.65.040 · code text
    the City will not enforce any development standard to the extent that it would have the effect of physically precluding the construction of a second unit or two-unit development on a parcel, or would physically preclude either the second unit or both units of a two-unit development from being at least 800 square feet in floor area.
Minimum new lot size
  • Each new parcel must be at least 1,200 square feet.
    § 17.30.040 · code text
    Neither resulting parcel shall be smaller than 1,200 square feet;
Setbacks
  • At least 4 feet from side and rear lot lines.
    Applies: Existing structures, or units rebuilt in the same place and size, need no setback beyond the existing one.
    § 18.65.040 · code text
    In all other circumstances, second units, and both units of a two-unit development, shall be set back at least four feet from the side and rear lot lines.
Standards
  • Allowed only in the RH, R1-20, R1-10 or R1-7.2 zones.
    Applies: SB 9 second units and two-unit developments.
    § 18.65.030 · code text
    Shall be located in the RH, R1-20, R1-10, or R1-7.2 zoning district;
  • No more than 2 stories, or 1 story if built on top of a 1-story structure.
    Applies: SB 9 second units and two-unit developments.
    § 18.65.040 · code text
    A second unit, and both of the units in a two-unit development, are limited to two stories, or to one story if built on top of a one-story structure.
  • At least 15 feet of separation.
    Applies: Between SB 9 units and the walls of other detached structures on the parcel.
    § 18.65.040 · code text
    There shall be at least 15 feet of separation between the walls of second units, and each unit of a two unit development, and walls of other detached structures on the same parcel.
  • At least 4 feet of clear space.
    Applies: Along each outside wall of an SB 9 unit, for public safety access.
    § 18.65.040 · code text
    There shall be at least four feet of unobstructed space adjacent to each exterior wall of a second unit and each unit of a two-unit development in order to ensure that the unit is accessible by public safety personnel.
  • Each new parcel must have access to or adjoin the public right-of-way, with an easement if needed.
    § 17.30.040 · code text
    Each parcel resulting from an urban lot split shall have access to or adjoin the public right-of-way, and, if necessary, provide the other parcel with access to the right-of-way through an easement.
Owner occupancy
  • Owner signs an affidavit to live on one new parcel as primary residence for at least 3 years from approval.
    Applies: Urban lot split; not for a community land trust or qualified nonprofit corporation.
    § 17.30.040 · code text
    The owner intends to occupy a residential dwelling unit on one of the parcels created by the urban lot split as their primary residence for a minimum of three years from the date of the approval of the urban lot split.
Parking
  • 1 new on-site off-street space per SB 9 unit, in addition to existing spaces.
    Applies: None needed within a half-mile walk of a high-quality transit corridor or major transit stop, or 1 block of a car share vehicle.
    § 18.65.040 · code text
    One new on-site off-street parking space is required for a second unit

Who this affects

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Frequently asked questions

Can I split my lot under SB 9 in Grand Terrace?

Grand Terrace's code: Neither new parcel may be smaller than 40% of the original lot area. (Urban lot split (SB 9).) (§ 17.30.040); No maximum; standards waived so each unit reaches at least 800 square feet; second unit not larger than main home. (SB 9 second units and two-unit developments.) (§ 18.65.040).

General information, not legal advice.

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