Local zoning · Montague

Montague — Nonconforming Uses

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

Last reviewed: July 6, 2026

Overview

Montague regulates “nonconforming” uses, structures, and sites in Title 17 Zoning, primarily in Chapter 17.28 Nonconforming Uses. The rules govern if, how, and when a use that does not meet current district regulations can continue, be changed, repaired, or must come into compliance. These provisions work alongside the city’s zoning, land use, development standards, parking, and design review processes.

Key rule: A nonconforming use may continue as-is, but it cannot expand; if it stops for one year, it is conclusively presumed abandoned and any new use must conform to the district. See § 17.28.010 .

How Montague defines and treats Nonconforming Uses

Definition. A nonconforming use is any use that “does not conform to the regulations for the district in which it is situated” (§ 17.08.490) .
Continuation, no enlargement. Existing nonconforming uses may continue, but a nonconforming structure or use of land may not be extended to occupy a greater area than it did at adoption of the current code (§ 17.28.010) .
Abandonment. If a nonconforming use is wholly discontinued for one year (except by court order), it is conclusively presumed abandoned; any subsequent use must conform (§ 17.28.010) .
Change of use (same or more restrictive). Without structural alterations, a nonconforming use in a nonconforming building may be changed to another use of the same or a more restrictive classification, but only with a use permit (§ 17.28.010; §§ 17.36.010–.030) .
Vacant land used nonconformingly. Nonconforming uses of land without structures may continue for up to three years from adoption of Chapter 17.28; after that, the land must conform (§ 17.28.020) .
Nonconforming structures: maintenance vs. enlargement. A nonconforming building or structure may not be enlarged, extended, reconstructed, or structurally altered unless the work makes it conform; maintenance/repairs/replacement of portions are allowed up to 25% of the building’s appraised value (assessor’s roll) (§ 17.28.030) .
Damage/destruction threshold. If a nonconforming building is destroyed more than 50% of its reasonable value by fire, explosion, casualty, or act of God, it may be restored and used only in compliance with district regulations (§ 17.28.040) .
Redistricting. The same rules apply to uses that become nonconforming because of later rezoning (§ 17.28.050) .
Variances cannot legalize a nonconforming use. A variance may not be used to permit a use or building not in conformity with the district’s regulations (§ 17.36.050) .

Overlay interaction — Airport Hazard Zoning

If your property lies in the Montague‑Yreka Airport hazard zones, additional nonconforming rules apply. Existing nonconforming structures/trees are not forced to change retroactively, but before any replacement, substantial alteration, repair, rebuilding, or allowing a tree to grow higher, a permit from the planning commission is required; no permit may increase an airport hazard (§ 17.24.070) . See Overlay Districts for how overlays layer onto base zoning.

Related general provisions touching “nonconforming lots”

Montague provides relief mechanisms for substandard residential parcels. For example, side yards on qualifying substandard residential lots may be reduced to 10% of parcel width, but not less than 4 feet (§ 17.32.190) . Additional “existing substandard” provisions are listed in Chapter 17.32’s contents, but detailed standards beyond § 17.32.190 were not retrieved. Not found in retrieved materials.

District-by-District: where nonconformity matters

Montague’s districts are designated in § 17.12.010: R-1, R-1A, R-2, R-3, C-1, C-2, M, R-AG‑2½, and the MH mobile-home overlay; applicability is mapped in § 17.12.030 . Nonconforming use rules in § 17.28 apply citywide, but how “conformity” is measured depends on what each district allows under § 17.16. The snapshots below highlight typical uses and any retrieved dimensional keys to help assess whether a use/structure is conforming today.

R-1 — Single-family residential district

Purpose snapshot: Low-density neighborhoods (implied by permitted uses) .
Typical permitted uses: Single-family dwellings, small supportive/transitional housing, small group care homes, and ADUs/JADUs under Chapter 17.30 (§ 17.16.030.B) .
Key dimensional standards: Minimum lot size 7,500 sq ft (§ 17.16.030.D) .
Where it applies: As mapped on the city Zoning Map (§ 17.12.030) .

R-1A — Expanded single-family residential district

Purpose snapshot: Larger-lot single-family areas (implied by designation and uses) .
Typical permitted uses: Single-family dwellings, small supportive/transitional housing, small group care homes, and ADUs/JADUs (§ 17.16.040.B) .
Key dimensional standards: Not found in retrieved materials.
Where it applies: As mapped (§ 17.12.030) .

R-2 — Medium-density residential district

Purpose snapshot: Duplex/triplex/fourplex potential (implied by cross-references) .
Typical permitted uses: Not found in retrieved materials. Note: R-1-density mobile home parks and “duplex, triplex, fourplex at R‑2 densities” appear as use-permit options when referenced from R-1 (§ 17.16.030.C.4–5) .
Key dimensional standards: Not found in retrieved materials.
Where it applies: As mapped (§ 17.12.030) .

R-3 — High-density residential district

Purpose snapshot: Higher-density multifamily (implied by designation) .
Typical permitted uses: Not found in retrieved materials.
Key dimensional standards: Not found in retrieved materials.
Where it applies: As mapped (§ 17.12.030) .

R-AG‑2½ — Residential-agricultural district

Purpose snapshot: Very-low-density residential with agricultural uses (§ 17.16.080) .
Typical permitted uses: Single-family dwellings, agricultural uses, supportive/transitional housing, small intermediate care facilities, and ADUs/JADUs; large employee housing by use permit (§ 17.16.080) .
Key dimensional standards: Not found in retrieved materials.
Where it applies: As mapped (§ 17.12.030) .

C-1 — Commercial district

Purpose snapshot: Neighborhood/central commercial retail and services (§ 17.16.090) .
Typical permitted uses: Indoor retail and services, banks, offices; ADUs allowed; by use permit: signs, parking lots, outdoor retail/service stations, and residential/hotel/motel/apartments as specified in R districts (§ 17.16.090) .
Key dimensional standards: Not found in retrieved materials. Note: Architectural/design review in C districts may be required (§ 17.32.220) ; see Design Review.
Where it applies: As mapped (§ 17.12.030) .

C-2 — General commercial district

Purpose snapshot: Broader commercial including heavier retail/service (§ 17.16.100) .
Typical permitted uses: All C‑1 permitted uses; additional specifics not fully retrieved (§ 17.16.100) .
Key dimensional standards: Not found in retrieved materials. Design review may apply (§ 17.32.220) .
Where it applies: As mapped (§ 17.12.030) .

M — Manufacturing district

Purpose snapshot: Industrial and manufacturing uses (§ 17.16.110 excerpts) .
Typical permitted uses: Light/heavy industrial and manufacturing (indoor or fenced), service stations; by use permit: potentially objectionable heavy industry (e.g., junkyards, concrete batch plants), retail/service accessory to industry, accessory residential (§ 17.16.110) .
Key dimensional standards: Not found in retrieved materials. Design review applies in M districts (§ 17.32.220) .
Where it applies: As mapped (§ 17.12.030) .

MH — Mobile home zone overlay

Purpose snapshot: Mobile-home overlay on base districts (§ 17.16.070 listed) .
Typical permitted uses and standards: Not found in retrieved materials.
Where it applies: As mapped and applied over base districts (§ 17.12.030) .

Nonconforming Scenarios and Who Decides

Scenario	Allowed?	Key Limit/Trigger	Who Approves	Code Reference
Continue an existing nonconforming use	Yes	No expansion beyond area occupied at adoption	Zoning is self-executing; staff confirms	§ 17.28.010
Change to another nonconforming use	Possibly	Must be same or more restrictive classification; no structural alterations	Use Permit required	§ 17.28.010; §§ 17.36.010–.030
Resume after discontinuance	No	One-year discontinuance creates conclusive abandonment	N/A	§ 17.28.010
Nonconforming use on vacant land	Temporarily	Max 3 years from Chapter 17.28 adoption	N/A after window	§ 17.28.020
Repair/maintenance of nonconforming structure	Yes	Cumulative work limited to 25% of appraised valuation	Building/Zoning with valuation check	§ 17.28.030
Rebuild after >50% destruction	Only if made conforming	Over 50% value lost triggers full compliance	Building/Zoning; new work must conform	§ 17.28.040
Legalize a nonconforming use via variance	No	Variances cannot allow nonconformity	N/A	§ 17.36.050
Replace/alter nonconforming item in Airport overlay	Maybe	Permit required; no increase in hazard	Planning Commission permit	§ 17.24.070

Practical notes that affect nonconforming status

District conformance is measured against the underlying district rules in § 17.16 (see Table 17.16.020) and the Zoning Map (§§ 17.16.020; 17.12.030) . If in a C or M district, architectural/design review can be a separate check when altering a structure (§ 17.32.220) ; see Design Review.
For residential parcels with constrained width, side-yard reductions for substandard lots may be available, separate from nonconforming-use continuation (§ 17.32.190) .
Signs often require separate compliance; see Signage. Nonconforming signs are not addressed in the retrieved sections; Not found in retrieved materials.
When uses change or intensify, verify parking and site standards still meet current code; see Parking. Nonconforming uses do not automatically grandfather nonconforming parking unless the code expressly provides it; Not found in retrieved materials.

Checklist

Confirm your base district on the city Zoning Map and the applicable rules in § 17.16; see Montague Zoning and Development Standards. (§§ 17.12.030; 17.16.010–.020)
Identify whether your use/structure is nonconforming and why (use type, structure, site dimensions). (§ 17.08.490; § 17.28.010)
If planning repairs: total the work relative to the structure’s appraised valuation; keep it at or below 25% unless all work brings the building into full conformity. (§ 17.28.030)
If damaged: assess whether loss exceeds 50% of reasonable value; if so, plan to meet all current district standards. (§ 17.28.040)
If contemplating a change of use: confirm it is of the same or more restrictive classification and obtain a use permit before proceeding. (§ 17.28.010; §§ 17.36.010–.030)
Check for overlays (e.g., Airport Hazard) that require separate permits for any replacement/alteration of a nonconforming item. (§ 17.24.070)
Do not rely on a variance to legalize a nonconforming use—this is prohibited. (§ 17.36.050)
For commercial/industrial projects, determine if Design Review is required. (§ 17.32.220)

Risks & Ambiguities

Issue	Why it matters	What to verify
“More restrictive classification”	Changing to a more restrictive nonconforming use is allowed with a use permit, but “restrictiveness” is not defined in the retrieved text (§ 17.28.010)	Ask Planning staff how “restrictiveness” is interpreted across districts and uses; review actual use tables in § 17.16.
25% valuation cap for repairs	Exceeding 25% could force full conformance (§ 17.28.030)	Confirm current assessor valuation and whether cumulative repairs in a given period are aggregated.
50% destruction threshold	Over 50% triggers full current-code rebuild (§ 17.28.040)	How is “reasonable value” determined and who makes that finding? Obtain the city’s valuation methodology.
One-year abandonment	Use rights are lost if discontinued for a year (§ 17.28.010)	Document continuous operation; clarify what evidence counts (licenses, utility bills, receipts).
R‑2/R‑3/MH standards	Missing details hinder conformity checks	Retrieve Table 17.16.020 and district sections for R‑2, R‑3, MH; Not found in retrieved materials.
Airport overlay permits	Altering/replacing nonconforming items may need a permit and cannot increase hazards (§ 17.24.070)	Confirm if parcel lies in approach/transitional/horizontal/conical zones and the permit steps.
Design review in C/M	Nonconforming structure changes might also need architectural approval (§ 17.32.220)	Confirm submittal materials and criteria with Planning; see Design Review.

Plain-English Summary

If your property in Montague has a use or building that doesn’t meet today’s zoning, you can generally keep using it, but you can’t make it bigger. If it sits idle for a year, you lose the right to keep the old use. Light repairs are fine up to 25% of the building’s appraised value; big rebuilds or heavy damage over 50% mean you have to meet today’s rules. To change to a less intensive (more restrictive) nonconforming use, you’ll need a use permit, and certain overlays like the airport zone add extra steps.

Source References

§ 17.08.490 (Definition of “Nonconforming use”)
§§ 17.12.010, 17.12.030 (Districts designated; Zoning Map conformance)
§ 17.16.010–.020 (Conformance; Table of district regulations)
§ 17.16.030.B–D (R‑1 uses; min. lot size)
§ 17.16.040.B (R‑1A allowed uses)
§ 17.16.080 (R‑AG‑2½ uses)
§ 17.16.090 (C‑1 uses)
§ 17.16.100 (C‑2 uses)
§ 17.16.110 (M uses)
Chapter 17.28 (Nonconforming Uses), including: § 17.28.010 (continuation/abandonment), § 17.28.020 (lands without structures), § 17.28.030 (repairs ≤25%), § 17.28.040 (>50% destruction), § 17.28.050 (redistricting)
§ 17.24.070 (Airport overlay nonconforming uses/permits)
§ 17.32.190 (Side-yard reduction for substandard residential lots)
§§ 17.36.010–.030 (Use permits) and § 17.36.050 (Variance—Nonconformity not allowed)

Also see: Montague zoning & planning overview, Montague Development Standards, Montague Variances and Exceptions, Montague ADUs, and, for context only, the California Building Standards Code.

Sources

Retrieved passages

Montague Zoning Code (§ 6.1) High relevance
Montague Zoning Code (§ 14) High relevance
Montague Zoning Code (chapter in) High relevance
Montague Zoning Code (§ 6) High relevance
Montague Zoning Code (Chapter 17.30.) Medium relevance
Montague Zoning Code (Title 17) Medium relevance
Montague Zoning Code (Title 17) Medium relevance
Montague Zoning Code (Title 17) Medium relevance
Montague Zoning Code (§ 7.3) Medium relevance
Montague Zoning Code (Chapter 17.36.) Medium relevance
Montague Zoning Code (§ 2) Medium relevance
Montague Zoning Code (Section 17.32.180) Medium relevance
Montague Zoning Code (Title 17) Medium relevance
Montague Zoning Code (Title 17) Medium relevance

Cited sections

§ 17.08.490 (Definition of “Nonconforming use”) (§ 17.08.490)
§§ 17.12.010, 17.12.030 (Districts designated; Zoning Map conformance) (§ 17.12.010)
§ 17.16.010–.020 (Conformance; Table of district regulations) (§ 17.16.010)
§ 17.16.030.B–D (R‑1 uses; min. lot size) (§ 17.16.030.B)
§ 17.16.040.B (R‑1A allowed uses) (§ 17.16.040.B)
§ 17.16.080 (R‑AG‑2½ uses) (§ 17.16.080)
§ 17.16.090 (C‑1 uses) (§ 17.16.090)
§ 17.16.100 (C‑2 uses) (§ 17.16.100)
§ 17.16.110 (M uses) (§ 17.16.110)
Chapter 17.28 (Nonconforming Uses), including: § 17.28.010 (continuation/abandonment), § 17.28.020 (lands without structures), § 17.28.030 (repairs ≤25%), § 17.28.040 (>50% destruction), § 17.28.050 (redistricting) (Chapter 17.28)
§ 17.24.070 (Airport overlay nonconforming uses/permits) (§ 17.24.070)
§ 17.32.190 (Side-yard reduction for substandard residential lots) (§ 17.32.190)
§§ 17.36.010–.030 (Use permits) and § 17.36.050 (Variance—Nonconformity not allowed) (§ 17.36.010)
Montague_ZoningCode.md

Frequently asked questions

What does Montague consider a “nonconforming use”?

A use that does not meet the current regulations for the district where it’s located. This can be due to later zoning changes or original noncompliance. See § 17.08.490 and § 17.28.050 .

Can I expand my nonconforming use or building?

No. You can continue the existing nonconforming use, but you cannot extend it to a greater area, and structural enlargements of nonconforming buildings are not allowed unless the work makes them conforming (§ 17.28.010; § 17.28.030) .

What happens if a nonconforming use stops for a while?

If the use is wholly discontinued for one year (except by court order), the city conclusively presumes it abandoned. Any new use must meet current zoning (§ 17.28.010) .

How much repair can I do on a nonconforming structure?

Maintenance/repairs/replacement of portions are allowed up to 25% of the building’s appraised valuation per the latest assessment roll. Beyond that, alterations must bring the structure into full conformity (§ 17.28.030) .

My nonconforming building was badly damaged—can I rebuild it as-is?

Not if damage exceeds 50% of reasonable value. In that case, reconstruction must comply with current district regulations (§ 17.28.040) .

Can I switch a nonconforming use to another use?

Only to a use of the same or more restrictive classification, and only if there are no structural alterations; you must first secure a use permit (§ 17.28.010; §§ 17.36.010–.030) .

Will a variance let me legalize a nonconforming use?

No. Montague prohibits using variances to authorize nonconforming uses (§ 17.36.050) .

Are there special nonconforming rules near the Montague‑Yreka Airport?

Yes. Existing nonconforming items may remain, but any replacement or substantial alteration requires a planning commission permit and cannot increase hazards to air navigation (§ 17.24.070) .

Do residential lots that are smaller than today’s standards get any relief?

Yes. Side yards on qualifying substandard residential parcels may be reduced to 10% of parcel width (minimum 4 feet) (§ 17.32.190) .

Where can I find what’s permitted in my district?

District regulations are in Chapter 17.16, and the Zoning Map in § 17.12.030 shows where each district applies. Some details (e.g., Table 17.16.020) were not in the retrieved materials and should be obtained from the city clerk (§§ 17.16.010–.020; 17.12.030) .

Ask about any Montague property

Get a cited, plain-English answer on Montague zoning, setbacks, FAR, ADUs and permits — for any address.

Start Free Trial