Detached ADU — 1720 Chalcedony Street

The formal authorizations you must obtain from the City to build this project — the permits and approvals it will issue. These are what you apply for and receive.

• Building Permit (Combination)Required
  A combination building permit covers structural, electrical, plumbing, and mechanical work for the ADU.
  City of San Diego Information Bulletin 400 — ADU/JADU SubmittalSDMC §141.0302 (ADU/JADU regulations)
  From the code

  • Application Process and Requirements Building Permit Requirement A Building Permit is required to create an ADU or JADU. There are no exemptions. Depending upon the number of dwelling units created by the ADU(s), either a Combination Building Permit or a Building Permit will — SD Information Bulletin 400, p. 15
• Ministerial ADU/JADU reviewRequired
  ADUs/JADUs that meet state standards are approved ministerially (no public hearing or discretionary findings).
  Cal. Gov. Code §66314 (ADU standards)SDMC §141.0302 (ADU/JADU regulations)
  From the code

  • Code Chapter 14: General Regulations (3-2026) (11) The record owner is not required to live on the same premises of an ADU. (c) Development Regulations for JADUs. (1) On a premises with an existing or proposed single dwelling unit, one JADU is permitted, subject ... following: (A) The JADU shall be within an existing or proposed single dwelling unit or attached garage; (B) Construction of the JADU may expand the floor area of the existing single dwelling unit up to 150 square feet to only allow for ingress and egress — SDMC §141.0302, p. 8
  • Diego Municipal Code Chapter 14: General Regulations (3-2026) (8) ADU Home Density Bonus Agreement. The affordable ADUs shall be guaranteed through a written agreement and a deed of trust securing the agreement, entered into by the applicant and President and Chief Executive Officer ... Diego Housing Commission, or their designee, prior to the issuance of a Building Permit for the first affordable ADU or bonus ADU, whichever occurs first, that meets the following requirements: (A) A rental affordable ADU home density bonus agreement shall utilize the following qualifying criteria — SDMC §141.0302, p. 13
• Grading permitVerify
  A separate grading permit is required when cut/fill exceeds City thresholds — common on sloped lots or new foundations. Verify quantities with a site plan.
  Slope and/or new footprint may trigger regulated earthwork.
  SDMC §142.01 (Grading Regulations)
• Right-of-way / encroachment permitVerify
  Required if work touches the public right-of-way (new/widened driveway, curb, sidewalk, or utility trench in the ROW).
  City of San Diego — Public Right-of-Way / Encroachment permit

Deterministic, source-cited — each item links its governing document. Items marked “Verify” depend on data not yet captured (lot geometry, construction valuation); confirm with DSD. First-iteration ruleset manifest-2026.06.08-v1.