Local zoning · Sausalito

Sausalito — Nonconforming Uses

Nonconforming Uses under the Sausalito local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page explains how the City of Sausalito treats nonconforming uses, nonconforming structures, and legal nonconforming lots under the Sausalito Zoning Ordinance (Title 10). The rules allow continued use in many cases but set strict limits on enlargement, lapse, demolition and replacement, and require a formal nonconformity permit for many changes. The controlling framework is in Chapter 10.62 (Nonconforming Uses and Structures) of the Sausalito Municipal Code (§ 10.62.010–.070) .

This page is Sausalito-specific and presumes familiarity with the city's overall zoning regime; see the city's main planning overview at Sausalito zoning & planning overview (/us/california/sausalito) and the formal Sausalito Zoning pages for maps and district assignments.

Core rules (what the ordinance says, in plain terms)

  • Continuation: A use or structure lawfully in place when the ordinance took effect can continue as a nonconforming use or structure; the rule of continuing legal existence is explicit in § 10.62.020 .
  • Enlargement/alteration: A building occupied by a nonconforming use may not be enlarged, extended, reconstructed, substituted or structurally altered except when converted to a permitted use or when a nonconformity permit is obtained per § 10.62.040(A) and § 10.62.070 .
  • Cessation / abandonment:
    • Voluntary vacancy of a nonconforming use for six months or more terminates the nonconforming right; minor structures under 400 sq ft are treated differently (90 days) (§ 10.62.040(E)) .
    • Some nonconforming uses involuntarily ceased may be reinstated within one year (§ 10.62.040(B)) .
  • Replacement / demolition: Rules distinguish voluntary vs involuntary demolition and partial vs substantial demolition; replication without losing the nonconforming feature is allowed in specific circumstances, and time limits apply (e.g., building permits must be obtained within one year of involuntary demolition) (§ 10.62.050) .
  • Documentation requirement: Replication of a lost nonconformity requires proof (permit plans or evidentiary hearing) per § 10.62.060 .
  • Title 24 / Building Code: Replacement structures must meet current California Building Standards Code (Title 24) unless an historic replication qualifies for California Historic Building Code treatment (§ 10.62.060(B)) . See the state's code at California Building Standards Code (/us/california/building-codes).
  • Nonconformity permits: The Planning Commission hears and may approve nonconformity permits; findings are listed at § 10.62.070(G), and the permit is generally effective at the end of the appeal period and expires two years after approval unless otherwise extended (§ 10.62.070) .
  • Parking: Table 10.62‑1 (Parking and Permit Requirements for Nonconforming Structures) governs when current parking requirements must be met and when the Planning Commission may waive replacement parking; that table is summarized in § 10.62.050(B) and § 10.62.070(G)(7) .

Refer to the full text of Chapter 10.62 for precise language: § 10.62.010–§ 10.62.070 .

District-by-district breakdown (how nonconformities interact with each Sausalito district)

Note: the ordinance organizes districts in Division II (Chapters 10.20–10.28). Below are the principal districts Sausalito uses and the development standards a nonconforming structure or use would be judged against when changes are proposed. For district maps and exact parcel designations, consult the Sausalito Zoning page.

Residential districts — R-1, R-2-2.5, R-2-5, R-3 (Chapter 10.22)

Purpose and where it applies:

  • These zones regulate single- and multi-family housing across Sausalito neighborhoods; see Chapter 10.22 for permitted uses and development intent (§ 10.22.030–.040) .

Typical permitted uses:

  • Single-family dwellings, accessory uses (including ADUs) and small residential care homes are generally permitted; larger care facilities or multi-family conversions may require conditional or minor use permits (§ 10.22.030) . See the ADU rules at Sausalito ADUs (/us/california/sausalito/adu).

Key dimensional standards (typical):

  • Maximum height commonly 32 ft, front setbacks commonly 10 ft where designated, side setbacks often 5–10 ft, rear 15–20 ft, and FAR/coverage limits per Table 10.22‑2 (see § 10.22.040 and Table 10.22‑2) . How nonconformities are treated:
  • Nonconforming residential structures can be remodeled or modestly extended if the work does not increase the specific nonconformity; larger changes generally require a nonconformity permit and design review (Chapter 10.54) (§ 10.62.050(A)) . Projects adding ADUs may be affected by the city's ADU policies; the ordinance states ADU permitting cannot be denied due to nonconforming zoning conditions that do not threaten health and safety (§ 10.44.080(I)) .

Commercial districts — CC, CR, CN (CN‑1/CN‑2), SC, CW (Chapter 10.24)

Purpose and where it applies:

  • Downtown and shoreline commercial areas use these districts to manage retail, services, and waterfront commercial activity; see § 10.24.050 for site development standards and district intent .

Typical permitted uses:

  • Retail, restaurants, personal services, limited offices, and harbor-related uses; some conversions (e.g., retail to office) require conditional use permits (§ 10.44.250) .

Key dimensional standards (typical):

  • Floor Area Ratios range (example) 0.35–1.3 depending on district and subdistrict; building coverage up to 70–100% in core commercial districts; minimum parcel sizes and setbacks vary by district (see Table 10.24‑2, § 10.24.050) .

How nonconformities are treated:

  • Nonconforming commercial uses cannot be enlarged or intensified without either converting to a permitted use or obtaining a nonconformity permit (§ 10.62.040) . For waterfront districts such as CW, special findings may be required and harbor/marina regulations in Chapter 10.44 apply; service-station-specific rules also affect nonconforming service stations (§ 10.44.260) .

Open space & public districts — OS, PP, PI, OA (Chapter 10.20)

Purpose and where it applies:

  • Parks, public facilities, and open-space lands; site standards in Table 10.20‑2 govern development and setbacks for non-residential/open-space uses (§ 10.20.040) .

How nonconformities are treated:

  • Same Chapter 10.62 framework applies; setbacks and special restrictions between open-space and adjacent residential zones are relevant when assessing change or replication of nonconforming elements (§ 10.20.040) .

Marinship / Industrial district — (Industrial / Marinship) (Chapter 10.26)

Purpose and where it applies:

  • Industrial and maritime uses in historic Marinship area. Nonconformity decisions must respect the district-specific performance and use standards found in Chapter 10.26 (see Division II list at § 10.12.010) .

How nonconformities are treated:

  • Industrial nonconformities (e.g., waterfront berths, marine facilities) are controlled by the same Chapter 10.62 limits; conditional or nonconforming permits may require extra findings for traffic, noise, and harbor impacts (§ 10.62.070(G)) .

Overlay districts — -H (Historic), -Pd (Planned Development) and other overlays (Chapter 10.28 and 10.46)

Purpose and where it applies:

  • Overlays modify base district rules (view protection, historic preservation, planned development) and are commonly combined with base zones; see Sausalito Overlay Districts for mapping.

How nonconformities are treated:

  • Historic resources get special treatment: a nonconforming use or structure listed on the National Register or local register may be allowed to resume after involuntary cessation and may be replicated under different code treatments (California Historic Building Code) subject to Historic Preservation Commission review (§ 10.62.040(D), § 10.62.060(B)) . Planned development overlays may alter lot width/coverage rules that affect nonconformity analyses (§ 10.22.040) .

Quick decision-relevant table

Topic What the code requires / allows Code reference
Continued operation of legally existing nonconforming uses Allowed to continue unless otherwise specified § 10.62.020
Enlargement / structural alteration Prohibited unless converted to permitted use or a nonconformity permit is issued § 10.62.040(A)
Voluntary vacancy period that terminates rights 6 months for most nonconforming uses (90 days for minor structures <400 sq ft) § 10.62.040(E)
Reinstatement after involuntary cessation May be reinstated within 1 year (longer reinstatement requires permit) § 10.62.040(B)
Replacement after demolition Involuntary demolition: replication allowed if building permit within 1 year; voluntary substantial demolition limits replication unless brought to code or variance obtained § 10.62.050(A)(3–7)
Parking when replicating/remodeling Table 10.62‑1 sets parking/permit triggers; Planning Commission may waive replacement parking in narrow circumstances § 10.62.050(B); § 10.62.070(G)(7)
Nonconformity permit: process & findings Planning Commission public hearing, environmental review; findings in § 10.62.070(G) § 10.62.070(A–G)

Checklist (what an applicant must satisfy for a nonconformity permit)

  • Demonstrate the use/structure was legally established and identify the specific nonconformity (plans, permits, or evidentiary proof) per § 10.62.060 .
  • Prepare scaled site plans showing all existing and proposed work, yards, parking, and floor plans per application requirements in § 10.62.070(C) .
  • Show that the proposed work will not cause a notable negative impact (parking, traffic, noise, views) and is compatible with neighborhood character per findings § 10.62.070(G)(2–3) .
  • If replacement/replication is proposed, document timing (was demolition involuntary? is a building permit being filed within one year?) and meet Title 24 or California Historic Building Code requirements as required (§ 10.62.050–.060) .
  • Be prepared for environmental review under Chapter 10.50 / Title 11 if the Commission requests it per § 10.62.070(D) .
  • Expect public notice/hearing and potential conditions; appeals go to City Council within 10 days (§ 10.62.070(E–I)) .
  • If parking rules would otherwise require additional spaces, prepare the justification for a waiver under § 10.62.070(G)(7) or provide required parking per Table 10.62‑1 .

Need help filing? Refer to the City's land use permit procedures at Sausalito Development Standards (/us/california/sausalito/development-standards) and Sausalito Design Review.

Risks & Ambiguities

Issue Why it matters What to verify
Legal status of the pre-existing condition The city requires proof of a lawful pre-existing nonconformity before replication or substitution Obtain historic permits, tax records, or prepare evidence for the Planning Commission hearing per § 10.62.060
Voluntary vs involuntary cessation Voluntary vacancy for 6 months (or 90 days for small items) extinguishes nonconforming right; involuntary cessation may allow reinstatement within 1 year Confirm whether vacancy was voluntary; if involuntary, document cause and timing per § 10.62.040(B,E)
Parking replacement obligation Table 10.62‑1 triggers new parking requirements in some replication/remodel cases and can kill feasibility unless waived Determine which demolition type (voluntary/involuntary, partial/substantial) applies and check Table 10.62‑1; be prepared to justify waiver under § 10.62.070(G)(7)
Historic resource exceptions Historic properties may be allowed replication under different code (California Historic Building Code) but require Historic Preservation Commission review Confirm local landmark or National/State register status and review § 10.62.060(B) and local historic overlay rules
Interaction with ADU rules ADU permitting cannot be denied solely for a nonconforming zoning condition that is not a safety threat — this affects feasibility For ADU projects, confirm ADU-specific provisions at § 10.44.080(I) (ADU nonconforming treatment)
Parcel-specific development standards Setbacks, FAR and coverage limits differ across R‑, C‑, and overlay combinations and may change what “reduced nonconformity” means Check the exact base district table (e.g., Table 10.22‑2 or Table 10.24‑2) and any overlays applicable to the parcel (§ 10.22.040, § 10.24.050)

When in doubt, verify with the Community Development Department; many findings are discretionary and parcel-specific.

Plain-English summary

If your building or business in Sausalito was legal when it was built but now violates current zoning, it usually can keep operating — but you generally cannot make it bigger, change it materially, or let it sit empty for long without losing that special status. Small repairs and limited replication are allowed under rules in § 10.62.010–.070, but bigger changes usually need a formal nonconformity permit and Planning Commission approval; parking, historic-resource status, and whether demolition was voluntary are often decisive factors .

Source References

  • Sausalito Municipal Code, Title 10 — Chapter 10.62, Nonconforming Uses and Structures: § 10.62.010–§ 10.62.070 (purpose, applicability, nonconforming uses, structures, documentation, permits) .
  • Sausalito Municipal Code, Residential districts and standards: § 10.22.030–§ 10.22.040 (land uses allowed; Table 10.22‑1 and Table 10.22‑2) .
  • Sausalito Municipal Code, Commercial districts and standards: § 10.24.050 (Table 10.24‑2 site development standards) .
  • Sausalito Municipal Code, ADUs: § 10.44.080 (ADU provisions and nonconforming code conditions) .
  • Sausalito Municipal Code, general permit procedures and findings: Chapters 10.50 / 10.54 (design review) and 10.82 (public notice) as cited inside § 10.62.070(C–E) .
  • Parking and nonconforming structures: Table 10.62‑1 summarized in § 10.62.050(B) and referenced in § 10.62.070(G)(7) .
  • For the California Building Standards Code referenced for replacement structures, see California Building Standards Code (/us/california/building-codes) and the local citation in § 10.62.060(B) .

Sources

Retrieved passages

  • Sausalito Zoning Code (§ 10.62.010.) High relevance
  • Sausalito Zoning Code (§ 10.62.030.) High relevance
  • Sausalito Zoning Code (section and) High relevance
  • CBC § 10.62.050 (Title XXIV.) High relevance
  • Sausalito Zoning Code (§ 10.60.090.) High relevance
  • Sausalito Zoning Code (§ 10.50.090) High relevance
  • Sausalito Zoning Code (§ 10.62.050) High relevance
  • CBC § 10.62.070 (§ 10.62.070) High relevance
  • Sausalito Zoning Code (§ 10.44.330) Medium relevance
  • Sausalito Zoning Code (§ 10.44.080) Medium relevance
  • Sausalito Zoning Code (§ 10.22.040) Medium relevance
  • Sausalito Zoning Code (§ 10.22.030) Medium relevance
  • Sausalito Zoning Code (§ 10.24.050.) Medium relevance
  • Sausalito Zoning Code (§ 10.28.060) Medium relevance
  • Sausalito Zoning Code (§ 10.44.080) Medium relevance
  • California Building Code Medium relevance

Cited sections

Frequently asked questions

What is a nonconforming use in Sausalito?

A nonconforming use is a use or structure that was lawfully established before the current Title 10 rules but does not comply with them now; the framework is defined in § 10.62.020 and the chapter purpose in § 10.62.010 .

Can I expand a nonconforming building in Sausalito?

Not automatically. Structural enlargement, extension or alteration of a nonconforming building is prohibited unless the use is changed to a permitted use or you obtain a nonconformity permit (see § 10.62.040(A) and the permit process in § 10.62.070) .

If my nonconforming business shuts down, how long before I lose the right to reopen?

If a nonconforming use is voluntarily vacated for six months or more it is lost; some minor nonconforming items under 400 sq ft are treated as lost after 90 days. Involuntary cessations may be reinstated within one year (§ 10.62.040(B),(E)) .

What happens if a nonconforming structure is demolished?

Rules depend on whether demolition was voluntary or involuntary and whether it was partial or substantial. Involuntary demolition can generally be replicated if a building permit is issued within one year; voluntary substantial demolition may prevent replication unless the replacement fully complies with code or a variance is obtained (§ 10.62.050) .

Will I have to add parking when I replicate a nonconforming structure?

Possibly. Table 10.62‑1 governs parking/permit requirements for replication and remodels; the Planning Commission may waive parking if specific findings are met (§ 10.62.050(B); § 10.62.070(G)(7)) . See Sausalito Parking for general parking policy.

Do historic buildings get special treatment for nonconformities?

Yes. Structures listed on the National or California registers or local landmarks may be allowed to resume a use after involuntary cessation and may be replicated under the California Historic Building Code, subject to historic review (see § 10.62.040(D) and § 10.62.060(B)) . See Sausalito Historic Preservation.

If my lot is substandard, does nonconforming-lot status protect me?

Legally existing substandard lots remain legal nonconforming; they can be developed consistent with Chapter 10.40 and the minimum- parcel rules in § 10.40.030 and Table 10.22‑2; the ordinance explicitly treats legally-created substandard lots as legal nonconforming (§ 10.40.030(C)) .

What findings does the Planning Commission make to grant a nonconformity permit?

The Commission must find documentation of the prior nonconforming entitlement, no notable negative impacts (parking, traffic, noise), compatibility with neighborhood character, contribution to district vitality if a use change is requested, consistency with district purpose, and reduction of nonconformity where practical — see § 10.62.070(G)(1–6) .

Can I convert a nonconforming commercial space to a different commercial use?

Substitution of one nonconforming use with another of similar or lesser intensity is allowed only with a nonconformity permit and the requisite findings (see § 10.62.070(A)(1) and the findings list § 10.62.070(G)) .

Do I always need design review for nonconforming-structure work?

Design review is often required for substantial remodels or replacements — Chapter 10.54 design review rules apply as noted in § 10.62.050 (e.g., involuntary substantial demolition may require design review approval) . See Sausalito Design Review. ---

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