GoCodebook · Research notes
Research notes for real estate work
Three AI-assisted research drafts link legal text to facts, records, and next steps. AI source checks record supporting evidence and open issues. Property-specific conclusions require separate records.
Research by city and task
45 research questions across nine city workflow pages. 3 have answer drafts; the remaining questions show Research pending.
Los Angeles
San Francisco
First three answers
LA-B01: Which Los Angeles zoning code applies to this parcel?SF-R01: How should rent increase and eviction coverage be checked separately in San Francisco?SD-B01: Which rules and permits must be checked for an ADU in San Diego's Coastal Overlay Zone?Check the applicable zoning code before selecting design standards
Select zoning standards before designing a project.
For Architect · Builder · Inspector
Read the practical answer and checklistLos Angeles uses two zoning codes. Check the parcel in ZIMAS before selecting design standards.
View supporting passages (3)
- LA Planning: which zoning code applies · FAQ: transition between the two codes
During this transition period, both the New Zoning Code and the Original Zoning Code will be in effect in different parts of the City.
- LA Planning: which zoning code applies · FAQ: Using ZIMAS
Utilizing ZIMAS and entering the subject property’s address, then selecting the “Planning and Zoning” drop-down and checking the “Zoning” field. Clicking on the zone will either send you to the Original Zoning Code or the New Zoning Code.
- LA Planning: Zoning Search · Zoning Search: property records and search fields
The online mapping system is used to look up property information, ranging from a parcel’s land use and zoning designations to its planning application and building permit history. The ZIMAS application is designed to provide zoning related information for specific properties. You can search ZIMAS by: Property Address, Street Intersection, Assessor Parcel Number, Case Number, Community Plan Area, Council District, Certified Neighborhood Council, PIN Number, Legal Description, and MapSheet.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Section 1.4.2 A.2–A.4 distinguishes Chapter 1A lots from Chapter 1 lots. Article 13 applies to both codes.
View supporting passages (3)
- LA adopted Chapter 1A Article 1 · §1.4.2(A)(2), printed 1-8 · PDF page 8
With the exception of Article 13. (Administration), this Zoning Code (Chapter 1A) applies only to projects located on lots with zone designations established in this Zoning Code (Chapter 1A), and does not apply to those lots zoned with districts established in Chapter I. (General Provisions and Zoning) of this Code.
- LA adopted Chapter 1A Article 1 · §1.4.2(A)(4), printed 1-8 · PDF page 8
Chapter I. (General Provisions and Zoning) of this Code does not apply to those areas in which this Zoning Code (Chapter 1A) is applicable, unless expressly stated in this Zoning Code (Chapter 1A).
- LA adopted Chapter 1A Article 1 · §1.4.2(A)(3), printed 1-8 · PDF page 8
Article 13. (Administration) applies to all land use and development in the City, including lots zoned with districts established in this Zoning Code (Chapter 1A) and lots where Chapter I. (General Provisions and Zoning) of this Code is still in effect.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Check express Chapter 1 references and succession or vesting provisions before excluding earlier rules.
View supporting passages (3)
- LA adopted Chapter 1A Article 1 · §1.4.2(A)(4), printed 1-8 · PDF page 8
Chapter I. (General Provisions and Zoning) of this Code does not apply to those areas in which this Zoning Code (Chapter 1A) is applicable, unless expressly stated in this Zoning Code (Chapter 1A).
- LA adopted Chapter 1A Article 1 · §1.4.4, printed 1-12; remaining conditions follow · PDF page 12
Any project with an entitlement application that was filed and for which all applications fees were paid prior to the effective date of this Zoning Code (Chapter 1A), where applied, may continue to use the zoning that was in effect at the time of application, provided that approvals are granted and used within the time limits established in Sec. 13A.2.7. (Scope of Decision), unless the applicant elects to utilize the provisions of Chapter 1A. Projects subject to Chapter I. (General Provisions and Zoning) shall be subject to any subsequent amendments to Chapter I. (General Provisions and Zoning) of this Code unless the application has been vested pursuant to Sec. 1.4.5. (Vested Rights).
- LA adopted Chapter 1A Article 1 · §1.4.5(A), printed 1-13; see referenced sections · PDF page 13
A. Any project with an approved entitlement listed in the table below may be considered vested - see the specific Section cross-referenced in the Table for additional vesting details.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Facts to check
- City boundary and parcel address
- Current zoning designation and lookup date
- Project scope and application date
Records to collect
- Current ZIMAS result
- Project description and drawings
- Relevant permit and zoning amendment records
Next step
Record the parcel's applicable code. Then review the standards for the proposed use and work.
Still to verify
- No parcel or map result has been supplied.
- The stored edition's effective date needs review.
Sources and review record
- LA City Planning — Decision Makers
Agency guidance · Opening paragraphs and ZIMAS link
Version: Date not stated · Text checked: 2026-10-10
- Los Angeles Zoning Code — LAMC Chapter 1A § 1.4.2
Law text · § 1.4.2
Version: 2026-08; completeness unverified · Text checked: 2026-10-17
- LA Zoning — Which Code Applies?
Agency guidance · FAQ answer
Version: Official FAQ body read directly · Text checked: 2026-10-18
- LA Chapter 1A — Adopted Article 1
Law text · §§1.4.2(A)(4), 1.4.4, 1.4.5
Version: 2025.1.0 adopted PDF; later amendments require a separate check · Text checked: 2026-10-18
AI-assisted research with recorded source checks. Open questions remain. Verify current law, effective dates, and property records before a property decision.
These source checks compare the stored law text. They do not establish that no later law or agency update exists.
Check rent increase coverage and eviction coverage separately
Check coverage before raising rent or ending a tenancy.
For Property Manager · Lawyer · Realtor
Read the practical answer and checklistCheck rent increases and eviction separately. Start with the Rent Board's separate rent-control and eviction-protection explanations.
View supporting passages (1)
- SF Rent Board: rental laws · Some units only have eviction protection
Some units have eviction protections, but do not have rent control protections: Units built after June 13, 1979 Most single-family homes and condos (if you moved in on or after Jan 1, 1996) Units that have undergone substantial rehabilitation Units controlled or regulated by another government unit or agency
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Do not use a rent increase exemption as the eviction coverage result. Review each protection and its exact exceptions.
View supporting passages (2)
- SF Rent Board: rental laws · Some units only have eviction protection
Some units have eviction protections, but do not have rent control protections: Units built after June 13, 1979 Most single-family homes and condos (if you moved in on or after Jan 1, 1996) Units that have undergone substantial rehabilitation Units controlled or regulated by another government unit or agency
- SF Administrative Code 37.3 · §37.3(d)(4): eviction authority remains separate
Subsection 37.3 (d) does not affect the authority of the City and County of San Francisco to regulate or monitor the basis or grounds for eviction.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Check relevant California protections separately. Civil Code Sections 1946.2 and 1947.12 are related starting points.
View supporting passages (3)
- SF Rent Board: rental laws · Rent Control: possible California coverage
Some units may still be covered by the California Tenant Protection Act (AB 1482) even if it does not have rent control.
- California Civil Code 1946.2 · Civil Code §1946.2(a): just-cause starting point; conditions and exceptions follow
(a) Notwithstanding any other law, after a tenant has continuously and lawfully occupied a residential real property for 12 months, the owner of the residential real property shall not terminate a tenancy without just cause, which shall be stated in the written notice to terminate tenancy.
- California Civil Code 1947.12 · Civil Code §1947.12(a)(1): rent-increase starting point; conditions and exceptions follow
(a) (1) Subject to subdivision (b), an owner of residential real property shall not, over the course of any 12-month period, increase the gross rental rate for a dwelling or a unit more than 5 percent plus the percentage change in the cost of living, or 10 percent, whichever is lower, of the lowest gross rental rate charged for that dwelling or unit at any time during the 12 months prior to the effective date of the increase.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Facts to check
- Unit type and certificate of occupancy date
- Ownership and tenancy start date
- Applicable exemptions and required notices
Records to collect
- Certificate of occupancy and building records
- Lease and tenancy records
- Ownership records and exemption notices
Next step
Record two coverage results: rent increases and eviction. Cite the provision and facts for each result.
Still to verify
- No individual unit's coverage has been determined.
- Definitions, specific exceptions, amendments, and relevant cases need expert review.
Sources and review record
- San Francisco Administrative Code § 37.3
Law text · § 37.3
Version: 2026-08; completeness unverified · Text checked: 2026-10-17
- San Francisco Administrative Code § 37.9
Law text · § 37.9
Version: 2026-08; completeness unverified · Text checked: 2026-10-17
- CIV § 1946.2
Law text · § 1946.2
Version: 2026-10; completeness unverified · Text checked: 2026-10-17
- CIV § 1947.12
Law text · § 1947.12
Version: 2026-10; completeness unverified · Text checked: 2026-10-17
- SF Rent Board — Evictions
Agency guidance · Single family dwellings, condominiums, buildings built after 1979
Version: Official agency body read directly · Text checked: 2026-10-18
- SF Rent Board — Learn about San Francisco rental laws
Agency guidance · Some units only have eviction protection; Special cases; AB 1482 reference
Version: Undated agency guidance; old rent-percentage example is excluded from this audit · Text checked: 2026-10-18
AI-assisted research with recorded source checks. Open questions remain. Verify current law, effective dates, and property records before a property decision.
These source checks compare the stored law text. They do not establish that no later law or agency update exists.
Check coastal applicability and permit conditions before using an ADU standard
Select the applicable ADU rules and coastal permit path.
For Architect · Builder · Inspector · Property Manager
Read the practical answer and checklistCheck whether the parcel is in the Coastal Overlay Zone. Review Section 141.0302(a)(7) before applying ADU design standards.
View supporting passages (1)
- SD Municipal Code 141.0302: official PDF · §141.0302(a)(7)(A), printed 14·1·3·2; other coastal rules follow · PDF page 2
An existing structure may only be converted or reconstructed as an ADU or JADU if the structure conforms to all the following regulations: (i) The wetland regulations in Section 143.0141(b); (ii) The sensitive coastal bluffs regulations in Section 143.0143; (iii) The coastal beaches regulations in Section 143.0144; and (iv) The Supplemental Regulations of the Coastal Overlay Zone in Section 132.0403.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Review the coastal permit path and the exemptions in Section 126.0704. A map location alone does not establish an exemption.
View supporting passages (2)
- SD Municipal Code coastal permit procedures: official PDF · §126.0702(a)–(c), printed 12·6·7·1 · PDF page 1
(a) Permits Issued by the City. A Coastal Development Permit issued by the City is required for all coastal development of a premises within the Coastal Overlay Zone described in Chapter 13, Article 2, Division 4, unless exempted by Section 126.0704, or if the proposed project site lies completely within the Coastal Commission Permit Jurisdiction or the Deferred Certification Area as described in Section 126.0702(b). (b) Permits Issued by the Coastal Commission. A Coastal Development Permit or exemption for all coastal development on a project site located completely within the Coastal Commission Permit Jurisdiction or in the Deferred Certification Area must be obtained from the Coastal Commission. The Coastal Commission Permit Jurisdiction and the Deferred Certification Area are shown on Map No. C-730.1, Map No. C-908, and Map No. C-1028, on file in the office of the City Clerk as Documents No. OO-17067-1, No. OO-18872, and No. OO-21719. (c) Permits Issued by the City and the Coastal Commission. A Coastal Development Permit or exemption issued by the City and the Coastal Commission are required for all coastal development on a premises located partially within the Coastal Commission permit jurisdiction. A Coastal Development Permit from each agency is required for the portion of the project within the agency’s jurisdiction.
- SD Municipal Code coastal permit procedures: official PDF · §126.0704(a), printed 12·6·7·2; exclusions (1)–(6) follow · PDF page 2
Improvements to existing structures are exempt, except if the improvements involve any of the following:
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Match each amendment to its applicable area and effective date. Bulletin 400 and the adopted update page give different status information.
View supporting passages (2)
- SD adopted code update status · 2024 Code Update: ordinance numbers and effective dates
Ordinances O-21836 2024 Land Development Code Ordinance O-21837 2024 Centre City Planned District and Gaslamp Quarter Planned District Ordinance Effective Dates Outside of the Coastal Overlay Zone: October 5, 2024 Inside of the Coastal Overlay Zone: September 10, 2026
- SD Information Bulletin 400 · Editor’s Note: certification warning and named ordinances
The regulations and guidelines outlined below will become effective within the Coastal Overlay Zone when the California Coastal Commission certifies Ordinance Numbers O-21618 , O-21758 , O-21836 , and O-21989 .
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
The official section editor's note identifies O-21989 and O-22109 as amendments that require coastal certification. Check the linked prior text for coastal research.
View supporting passages (1)
- San Diego official §141.0302 and amendment history · §141.0302 editor note: O-21989 and O-22109
Editors Note: Amendments as adopted by the following ordinances will not apply within the Coastal Overlay Zone until the California Coastal Commission certifies them as Local Coastal Program Amendments. Click the Ordinance number to view the full Strikeout Ordinance and click the Amended Section link to view the previous version of this section highlighting changes to prior language. Once the California Coastal Commission has certified the amendments, a Certified Date will be added to the relevant Ordinance note above. ( O-21989 , §141.0302 Amended (O-21989) ; O-22109 , §141.0302 Amended (O-22109) )
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
Facts to check
- City boundary, parcel, and Coastal Overlay Zone
- Permit jurisdiction and coastal appeal area
- Existing structures, proposed work, and application date
- Amendments that affect the proposed work
Records to collect
- Official zoning and overlay result
- Existing and proposed drawings
- Applicable ordinances and certified LCP amendment records
- Recorded JADU agreement if rental use is proposed
Next step
Confirm the applicable version and coastal permit path. Then evaluate the ADU design and rental conditions.
Coastal status guidance differs
- Bulletin 400 lists O-21618 and O-21836 among amendments awaiting coastal certification.
View supporting passages (1)
- SD Information Bulletin 400 · Editor’s Note: certification warning and named ordinances
The regulations and guidelines outlined below will become effective within the Coastal Overlay Zone when the California Coastal Commission certifies Ordinance Numbers O-21618 , O-21758 , O-21836 , and O-21989 .
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
- SD Information Bulletin 400 · Editor’s Note: certification warning and named ordinances
- The update page lists coastal dates of February 6, 2025, for the 2022 update and September 10, 2026, for the 2024 update.
View supporting passages (2)
- SD adopted code update status · 2024 Code Update: ordinance numbers and effective dates
Ordinances O-21836 2024 Land Development Code Ordinance O-21837 2024 Centre City Planned District and Gaslamp Quarter Planned District Ordinance Effective Dates Outside of the Coastal Overlay Zone: October 5, 2024 Inside of the Coastal Overlay Zone: September 10, 2026
- SD adopted code update status · 2022 Code Update: ordinance numbers and effective dates
2022 Code Update The 2022 Code Update was adopted on March 7, 2023. City Council First Reading: Feb. 14, 2023 ( Agenda - Item 330 ) City Council Second Reading: Feb. 28, 2023 ( Agenda - Item 57 ) Code Updates Matrices 2022 LDC Update Matrix (48 Items) 2022 Centre City Planned District Ordinance Matrix (31 Items) Ordinances O-21618 2022 Land Development Code Ordinance O-21619 Centre City Planned District Ordinance O-21905 Coastal Commission Modifications to the 2022 Land Development Code Ordinance Effective Dates Outside of the Coastal Overlay Zone: May 6, 2023 Inside of the Coastal Overlay Zone: February 6, 2025
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
- SD adopted code update status · 2024 Code Update: ordinance numbers and effective dates
- The official section history records coastal certification for O-21618 on February 6, 2025. It records O-21758 on March 11, 2026, and O-21836 on September 10, 2026.
View supporting passages (3)
- San Diego official §141.0302 and amendment history · §141.0302 history: O-21618
(Amended 3-7-2023 by O-21618 N.S.; effective 5-6-2023; certified by California Coastal Commission 2-6-2025.)
- San Diego official §141.0302 and amendment history · §141.0302 history: O-21758
(Retitled from “Accessory Dwelling Units and Junior Accessory Dwelling Units” to “Accessory Dwelling Units and Junior Accessory Dwelling Units” and amended 1-16-2024 by O-21758 N.S.; effective 3-16-2024; certified by California Coastal Commission 3-11-2026.)
- San Diego official §141.0302 and amendment history · §141.0302 history: O-21836
(Amended 7-22-2024 by O-21836 N.S.; effective 10-5-2024; certified by the California Coastal Commission 9-10-2026.)
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
- San Diego official §141.0302 and amendment history · §141.0302 history: O-21618
Use section-level history to identify certified amendments. Confirm the applicable amended text and parcel boundary before deciding the coastal rules.
Legal effect unresolved
JADU rental guidance differs
- Section 141.0302(a)(8) states that JADUs have no rental term limitation under that provision.
View supporting passages (1)
- SD Municipal Code 141.0302: official PDF · §141.0302(a)(8), printed 14·1·3·3; no conclusion about other rules · PDF page 3
An ADU shall not be used for a rental term of less than 31 consecutive days. JADUs are not subject to rental term limitations.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
- SD Municipal Code 141.0302: official PDF · §141.0302(a)(8), printed 14·1·3·3; no conclusion about other rules · PDF page 3
- Bulletin 400's JADU item 7 requires a rental period longer than 30 days.
View supporting passages (1)
- SD Information Bulletin 400 · JADU Regulations: rental period and STRO
JADUs must be rented for a period longer than 30 days. JADUs may not be used for Short-Term Residential Occupancy (STRO).
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
- SD Information Bulletin 400 · JADU Regulations: rental period and STRO
- The O-21989 comparison marks the former ADU/JADU 31-day restriction as deleted. It adds different rental language in Section 141.0302(a)(8).
View supporting passages (2)
- O-21989 comparison of former and amended §141.0302 · PDF page 2: struck-out former (b)(1)(B); visual review recorded · PDF page 2
An ADU or JADU shall not be used for a rental term of less than 31 consecutive days.
- O-21989 comparison of former and amended §141.0302 · PDF page 2: added (a)(8); visual review recorded · PDF page 2
An ADU shall not be used for a rental term of less than 31 consecutive days. JADUs are not subject to rental term limitations.
These passages support the limited statement or research recommendation. They do not establish a property's eligibility. If the source opens at the top, use the quoted text to find the passage.
- O-21989 comparison of former and amended §141.0302 · PDF page 2: struck-out former (b)(1)(B); visual review recorded · PDF page 2
Separate former coastal language from the amended text. Check STRO rules and recorded agreements before deciding whether a rental is permitted.
Legal effect unresolved
Still to verify
- The section-level history identifies certified amendments. Parcel location and the operative text for the proposed work still need review.
- The official section editor's note still identifies O-21989 and O-22109 for a coastal certification check.
- The stored section now includes the full captured source span with 3-2026 body labels. The official PDF has 9-2026 labels. Compare the official text before applying a standard.
- No parcel-specific permit or rental decision has been made.
Sources and review record
- San Diego — Information Bulletin 400
Agency guidance · Editor's Note; JADU General Regulations item 7
Version: January 2026 · Text checked: 2026-10-18
- San Diego Municipal Code — Chapter 14 Article 1 Division 3
Law text · PDF printed pages 2–3; §141.0302(a)(7)–(8)
Version: 9-2026 · Text checked: 2026-10-18
- San Diego Municipal Code — Coastal Development Permits
Law text · §126.0704
Version: 9-2026 official PDF; individual amendment applicability remains unresolved · Text checked: 2026-10-18
- San Diego Municipal Code § 141.0302
Law text · § 141.0302
Version: 2026-10 library edition; 3-2026 body labels; section boundary restored October 18, 2026 · Text checked: 2026-10-18
- San Diego Municipal Code § 126.0704
Law text · § 126.0704
Version: 2026-10; completeness unverified · Text checked: 2026-10-17
- San Diego Planning — Adopted LDC Updates
Amendment status · 2022, 2024, 2026 Code Update — Effective Dates
Version: Dated status page · Text checked: 2026-10-18
- San Diego official §141.0302 amendment history
Law text · §141.0302 and its section-level history
Version: Official electronic code; read October 18, 2026 · Text checked: 2026-10-18
- O-21989 comparison: former and amended §141.0302
Amendment status · PDF page 2; strikeout and added text
Version: Official comparison, not a clean coastal code · Text checked: 2026-10-18
AI-assisted research with recorded source checks. Open questions remain. Verify current law, effective dates, and property records before a property decision.
These source checks compare the stored law text. They do not establish that no later law or agency update exists.