Santa Monica — Subdivisions & Land Divisions

Tentative Subdivision Maps: Five or More Parcels or Interests

A tentative subdivision map must be prepared by a registered civil engineer or licensed land surveyor. It must identify the subdivision, ownership, boundary, existing and proposed land use, and enough surrounding context to locate the site within Santa Monica. § 9.54.030(A)–(B)

The map must also depict existing site conditions at and at least 100 ft beyond the boundary, including contours, trees, structures, flood or stormwater conditions, streets, easements, utilities, and—in applicable locations—60, 65, and 70 CNEL noise contours. § 9.54.030(B)(7)

For the proposed subdivision, the tentative map must show lot layout, dimensions, grading, streets, easements, utility systems, recreation or park sites, common open-space areas, and phased construction if development is proposed in units. § 9.54.030(B)(8), (12)

Required Supporting Materials

A complete application can require more than the drawing itself. Chapter 9.54 lists a current preliminary title report, environmental materials, a Housing Element compliance plan, building plans and elevations, landscape plan, condominium checklist, CC&Rs, tenant and conversion documents where relevant, energy-conservation plan, permit applications, radius map/mailing list, soil report, and other information the Director considers necessary. § 9.54.030(C)

Environmental processing controls the clock: the City’s action periods do not begin until the subdivision is found exempt or the appropriate initial study and negative declaration or environmental impact report have been prepared, processed, and considered. § 9.54.030(C)(2)

The Director must accept or reject a tentative subdivision map for filing in writing within 30 days after submittal. If rejected, the City must state the reasons; substantive action time runs from the letter accepting the map for filing. § 9.54.030(D)

Tentative Parcel Maps: Four or Fewer Parcels or Interests

A tentative parcel map must also be prepared by a registered civil engineer or licensed land surveyor. It is drawn on one sheet, at a scale approved by the City Engineer, with lettering at least one-eighth inch high. § 9.54.050(A)–(B)

Its required content is detailed but tailored to a smaller division: ownership and preparer information, assessor parcel number, map basics, existing and proposed use, vicinity map, site topography and trees, structures, inundation and watercourses, streets, improvements, storm drains, utility lines, easements, proposed improvements, grading, proposed lot layout and areas, proposed easements, contour source, and a title report dated within 3 months of application. § 9.54.050(C)

A preliminary soil or engineering-geology report may be required by the City Engineer. The supporting-material list also includes environmental review, Housing Element compliance, building and landscape plans, condominium and conversion documents where applicable, a preliminary soil report unless waived by the Building Officer, and other materials deemed necessary by the Director. § 9.54.050(C)(14); § 9.54.050(D)

The Director must accept or reject a tentative parcel map within 15 days of submittal. A rejection must identify the reason, and the processing period begins when the City issues its acceptance letter. § 9.54.050(E)

Parcel-Map Waivers

The Planning Commission may waive both tentative and final parcel maps only when the waiver is consistent with Chapter 9.54’s purpose and the General Plan. The waiver route is expressly unavailable for a condominium, stock cooperative, community apartment, or cooperative apartment, whether newly built or converted. § 9.54.050(G)

The applicant must submit a request explaining that consistency and a detailed survey plot map of all affected parcels. After a public hearing and City Engineer approval of the plot-map content, the Planning Commission may approve, conditionally approve, or deny the waiver; its decision is not appealable. § 9.54.050(H)

If approved, the City records a Certificate of Compliance identifying the property and stating that the division complies with the Subdivision Map Act and Chapter 9.54. § 9.54.050(H)(5)

Lot Line Adjustments

A lot line adjustment moves land between adjoining parcels without creating a greater number of parcels. § 9.54.010(E)

No tentative or final map is required for an adjustment involving 4 or fewer existing adjoining parcels only if it creates no additional parcels or building sites, does not increase the potential for either affected parcel to be further divided, and creates no Municipal Code violation. § 9.54.020(D)(2)

A plot map and certificate of compliance are required for lot line adjustments under the chapter’s stated map-exception framework. Parcel configuration must still be checked against Santa Monica Development Standards, including any district-specific parcel rules. § 9.54.020(D)(4)

Voluntary Parcel Mergers

A merger joins 2 or more contiguous parcels under one ownership into one parcel. § 9.54.010(E)

The City Engineer may authorize and record a voluntary merger only after finding, among other things, that it will not disturb prior fees, grants, easements, agreements, dedications, offers, or security; that the parcels are legally created or have certificates of compliance; that the exterior boundary remains unchanged; and that all necessary interested parties consent as required. § 9.54.110(A)(1)–(6)

The merged parcel cannot exceed the lot-consolidation size limit for its zoning district. Because that cap depends on the property’s district, verify the parcel on the Official Districting Map and applicable Santa Monica Zoning standards before pursuing a merger. § 9.54.110(A)(7); § 9.02.020

The City Council establishes voluntary-merger review and processing fees by resolution; the amount is Not found in source materials. § 9.54.120

Air Space Subdivisions

For an air-space subdivision, minimum lot size, dimensions, lot area, parking, setbacks, density, building envelope, yards, landscaping, inclusionary housing, and technical-code standards are evaluated as though all air-space lots were merged into a single lot. § 9.54.100(B)

That rule prevents an air-space map from multiplying development capacity by treating stacked ownership spaces as independent ground parcels. For non-condominium, non-community-apartment, and non-cooperative-apartment air-space lots, the tentative map must be conditioned on recorded instruments providing acceptable access to public rights-of-way and preserving the unified-site compliance approach. § 9.54.100(B)(1)–(2)

District-Specific Land-Division Implications

Chapter 9.54 is citywide and does not establish separate subdivision map types by zoning district. District location still matters because no subdivision may be developed for a purpose inconsistent with the General Plan, applicable specific plan, or comprehensive land-use ordinance. § 9.54.010(C)–(D)

R1 — Single-Unit Residential

The R1 district is Santa Monica’s Single-Unit Residential district. For ordinary parcel creation, Chapter 9.54 does not itself establish R1 lot dimensions; the related development table identifies a 5,000 sq. ft. minimum parcel area, 50 ft minimum width, 100 ft minimum depth, and 1 unit per parcel, subject to listed exceptions and separate rules. § 9.02.010(A); § 9.07.030

An R1 division must therefore be tested against those development standards in addition to the map rules. Typical residential buildout also implicates Santa Monica ADUs, setbacks, FAR, height, and potentially Santa Monica Design Review, but those standards are not created by Chapter 9.54. § 9.54.010(C); § 9.07.030

OP1 — Ocean Park Single-Unit Residential

The OP1 district is the Ocean Park Single-Unit Residential district. Chapter 9.54 does not provide an OP1-specific ordinary-subdivision standard; parcel legality and resulting development remain subject to the applicable zoning controls. § 9.02.010(A); § 9.54.010(C)

For the state-law lot-split pathway discussed below, OP1 is expressly named alongside R1. Verify parcel-specific development standards, mapped location, and any applicable Santa Monica Overlay Districts before relying on a division strategy. § 9.31.125(A); § 9.02.010(B)–(C)

OF — Oceanfront

The OF district is Santa Monica’s Oceanfront district. Chapter 9.54 does not give OF a special map threshold, but the resulting division and development must be consistent with OF land-use and dimensional controls. § 9.02.010(A); § 9.54.010(C)

The supplied OF standards identify a 5,000 sq. ft. minimum parcel size, 50 ft minimum width, and 100 ft minimum depth. Along Pacific Coast Highway between the Pier and northern City limits, density and form standards have additional location-specific rules; verify with the jurisdiction before drawing new parcel lines. § 9.14.030

All Other Base and Overlay Districts

Santa Monica’s remaining base districts include R2, R3, R4, OPD, OP2, OP3, OP4, MUBL, MUB, GC, NC, HMU, IC, OC, CC, PL, OS, RMH, BTV, MUC, CAC, CCS, LT, NV, BC, TA, OT, and WT. § 9.02.010(A)

The source materials do not establish district-by-district subdivision dimensions, purposes, or permitted-use tables for all of those districts. Chapter 9.54’s controlling rule is instead that any land division and development must conform to the governing plan and zoning provisions; verify the parcel’s base and overlay district on the Official Districting Map. § 9.54.010(C); § 9.02.020

State-Law Lot Splits Referenced by Chapter 9.54

Santa Monica’s separate duplex-and-lot-split provision applies to R1, OP1, and certain single-unit-limited parcels in multi-unit residential and Ocean Park districts. Lot splits under that provision remain subject to Chapter 9.54 as modified by § 9.54.140. § 9.31.125(A), (C)(2)

For a qualifying lot split, each resulting parcel must be at least 1,200 sq. ft. and at least 40% of the original parcel size; no minimum width or depth applies. Each parcel needs public-right-of-way access and required easements for public services and facilities. § 9.31.125(D)(1)–(4)

The source materials identify additional eligibility restrictions, including limits tied to historic resources, hazardous or sensitive sites, protected/rent-restricted housing, recent tenant occupancy, and Ellis Act evictions. Applicants generally must intend to occupy a unit as a principal residence for at least 3 years, subject to specified community-land-trust and qualified-nonprofit exceptions. § 9.31.125(A), (D)(5)–(6)

Checklist

• Confirm whether the proposal creates 5 or more interests requiring subdivision maps or 4 or fewer requiring parcel maps. § 9.54.020(B)–(C)
• Confirm the proposal conforms to the General Plan, any applicable specific plan, and governing zoning rules. § 9.54.010(C)
• Identify the parcel’s base district and any overlay district on the Official Districting Map. § 9.02.020
• Retain a registered civil engineer or licensed land surveyor for the tentative map. § 9.54.030(B); § 9.54.050(A)
• Provide existing conditions, proposed lots, access, easements, utilities, grading, and required map information. § 9.54.030(B); § 9.54.050(C)
• Submit a preliminary title report dated within 3 months when required. § 9.54.030(C)(1); § 9.54.050(C)(13)
• Provide required environmental, housing, soil, conversion, and other supporting materials. § 9.54.030(C); § 9.54.050(D)
• For an air-space project, document unified-site compliance and public-right-of-way access. § 9.54.100(B)
• For a lot line adjustment, confirm no new parcel/building site, no added division potential, and no Municipal Code violation. § 9.54.020(D)(2)
• For a voluntary merger, confirm recorded-boundary, consent, fee, and lot-consolidation findings. § 9.54.110(A)

Risks & Ambiguities

Information Gaps

The source materials do not provide the complete text of § 9.54.060, § 9.54.070, or the full § 9.54.140 procedures. Final-map execution, hearing, findings, appeal, extension, and special-state-law procedural details beyond the supplied text are Not found in source materials. Verify with the jurisdiction.

Plain-English Summary

In Santa Monica, dividing property is a mapping-and-entitlement process: 5 or more new parcels or equivalent interests require subdivision maps, while 4 or fewer generally require parcel maps. § 9.54.020 Your proposed lots must also work under the property’s actual zoning and development rules; a recorded map does not by itself create permission to build more units or a different use. § 9.54.010(C)

Source References

• Santa Monica Municipal Code, Land Divisions—general authority, purpose, conformity, applicability, and definitions: § 9.54.010
• Santa Monica Municipal Code, map requirements and exemptions: § 9.54.020
• Santa Monica Municipal Code, tentative subdivision maps: § 9.54.030
• Santa Monica Municipal Code, tentative parcel maps and waivers: § 9.54.050
• Santa Monica Municipal Code, decision standards for air-space subdivisions: § 9.54.100
• Santa Monica Municipal Code, voluntary merger and fees: § 9.54.110; § 9.54.120
• Santa Monica Municipal Code, districts and Official Districting Map: § 9.02.010; § 9.02.020
• Santa Monica Municipal Code, R1 and OF development standards: § 9.07.030; § 9.14.030
• Santa Monica Municipal Code, duplexes and lot splits on single-unit residential parcels: § 9.31.125
• Santa Monica Land Use
• Santa Monica Historic Preservation
• California housing laws