Local zoning · Lompoc

Lompoc — Nonconforming Uses

Q: If my nonconforming building is damaged in a fire, can I rebuild it as it was?

If involuntary damage repair is 50% or less of replacement value, you may restore it if permits are obtained and restoration begins within 180 days ; if damage exceeds 50% , reconstruction must meet current Code unless a specific residential or HSO exception applies ( § 17.620.100.B.1.a–b, c–d )

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

Ask a question free See coverage

Last reviewed: July 2, 2026

Overview

This page summarizes how the City of Lompoc treats nonconforming uses, nonconforming structures, and nonconforming parcels under the local zoning ordinance (Title 17). It focuses only on the City rules for continuing, changing, repairing, or losing legal nonconforming status; it does not cover building‑code (Title 24) compliance, habitability, tenant law, or statewide ADU law beyond how those topics intersect with the zoning rules. For the City’s broader landing pages see the City’s Lompoc zoning & planning overview and the specific Lompoc Zoning menu entries.

Key controlling chapter: Chapter 17.620 — Nonconforming Uses, Structures, and Parcels (Title 17). The ordinance’s stated intent and scope are in § 17.620.010 .

How the Chapter works (top-line rules)

A property owner must prove a nonconformity is legally established; the Director may require historical permits or evidence and can make a determination using pre‑1965 presumptions if records are not available (§ 17.620.020) .
A nonconforming use or structure may generally be continued and maintained but is limited in expansion, intensification, or reestablishment after abandonment (§ 17.620.030, § 17.620.040, § 17.620.050) .
Loss of nonconforming status occurs after continuous discontinuance for three years or by destruction above prescribed thresholds; special rules apply for residential rebuilding, the H Street Overlay, and certain Old Town registries (§ 17.620.100, § 17.620.090) .
The City intends nonconformities to be gradually eliminated while allowing reasonable maintenance and public‑safety upgrades; the Chapter does not treat illicit/unlawful uses as protected nonconformities (§ 17.620.010) .

District-by-district guidance (how nonconforming rules apply in key Lompoc zones)

Note: Chapter 17.620 is a citywide chapter — the nonconforming rules apply across zones — but a few zones or overlays receive explicit special treatment in the Code. The entries below summarize each zone's purpose or standards where those zone rules appear in the retrieved materials and explain the specific nonconforming interactions that the Code calls out. For full permitted‑use lists and dimensional tables consult the City’s Lompoc Zoning and Lompoc Development Standards pages; setback and dimensional references below point to ordinance locations where applicable.

R-1 (Single‑Family Residential)

Purpose / where it applies: basic single‑family neighborhoods (see residential site standards in § 17.304.050.B) .
Typical permitted uses: single‑family dwellings and accessory residential uses (see zone tables in the Zoning chapter) — consult the City zoning tables for exact lists on the Lompoc Zoning page.
Key dimensional standards referenced in the Code: lot size and spacing standards for residential development (e.g., minimum lot area, minimum building separations) are enforced by Chapter 17.304 and applied when reconstructing or altering nonconforming residential buildings; see § 17.304.050 for specific lot/spacing rules that the Director will reference when determining whether a nonconforming dwelling can be reinstated or modified .
Nonconforming interaction: Nonconforming residential structures may be repaired and improved provided work does not increase the degree of nonconformity; if involuntarily destroyed, residential nonconforming uses may be reinstated under the residential rebuilding rules (limits on gross floor area, number of units, Building Permit timing) in § 17.620.100.B.1.c and .d .

OTC (Old Town Commercial) Zone

Purpose / where it applies: the Old Town commercial core (the OTC is referenced in nonconforming provisions) — see Old Town policies in the Zoning and Overlay chapters.
Typical permitted uses: commercial retail, services, some hospitality and mixed uses (refer to OTC use tables in the zoning chapter).
Key dimensional standards: OTC often carries special review and design standards; nonconforming structures in the OTC may receive expanded flexibility when a Conditional Use Permit is approved and specific findings are made (economic or public‑safety benefit, no significant intensity increase, <10% gross floor addition, etc.) — see § 17.620.050.D.1–6 for the Conditional Use Permit findings and constraints .
Nonconforming interaction: the OTC specifically allows reinvestment/expansion beyond typical nonconforming limits if the review authority finds community benefit and limited intensity impact (§ 17.620.050.D) .

H Street Overlay Zone (HSO)

Purpose / where it applies: the H Street Overlay (HSO) is a special overlay that modifies design and reconstruction rules for parcels within its boundary.
Typical permitted uses: follow underlying zone with overlay design constraints (consult the Lompoc Overlay Districts page).
Key dimensional standards: overlay rules interact with automatic reconstruction exceptions. A nonconforming structure in the HSO that is destroyed may be rebuilt "as it existed prior to destruction" provided it meets Building and Fire Code requirements — see § 17.620.100.B.1.d and the HSO exception language in § 17.620.050.D / § 17.620.100 .
Nonconforming interaction: the HSO carries an express exception allowing reinstatement to prior form where the Building and Fire Code are satisfied; verify HSO applicability in the overlay map and overlay chapter before relying on this option (§ 17.620.100.B.1.d) .

I (Industrial) and BP (Business Park) Zones

Purpose / where it applies: industrial and business park districts with lot and setback tables in § 17.216.040 (Table 17.216.040.A) .
Typical permitted uses: industrial, manufacturing, wholesale, distribution (I) and low‑intensity business/office/industrial (BP) — see the zoning use tables for exact lists on the City zoning pages.
Key dimensional standards: Table 17.216.040.A lists lot area, lot frontage, and setbacks for I and BP zones; those dimensional standards control what a repaired or expanded nonconforming structure must meet when enlargement would otherwise increase nonconformity (§ 17.216.040, referenced by § 17.620.050.A) .
Nonconforming interaction: nonconforming industrial structures may be enlarged if the enlargement complies with all applicable Code requirements and does not increase the degree of nonconformity (§ 17.620.050.A) .

Old Town Commercial Registries (special registry status)

Purpose / where it applies: The City maintains registries for previously existing drive‑throughs and automobile sales/rental/repair uses in Old Town.
Nonconforming interaction: lots listed in these registries are explicitly made not subject to the general nonconforming uses rules in § 17.620.040 (i.e., they have separate handling) — see § 17.620.090.D .

Decision‑relevant quick table

Issue / standard	What the Code allows / requires (plain phrase)	Code reference
Maximum allowed expansion of an existing nonconforming use (Director discretion)	Up to 25% gross floor area expansion if Director finds the expansion brings the use into greater conformity	§ 17.620.040.A
Intensification limits on nonconforming uses	No extension of hours, occupancy capacity, traffic/noise, or parking demand increases allowed	§ 17.620.040.B
Replacing nonconforming uses in multi‑tenant centers	Replacement allowed by a similar/less intensive nonconforming use if not vacant > 3 years and not detrimental	§ 17.620.040.D
Repair limit for multi‑family / nonresidential structures	Repairs/improvements allowed up to 50% of current market value (yearly cap: ≤50% unless AD/SD Review)	§ 17.620.050.B.2.a–b
Discontinuance threshold to lose status	Continuous discontinuance 3 years → nonconforming rights terminated (with narrow exceptions)	§ 17.620.100.A.1
Destruction threshold	If involuntary damage repair cost > 50% of replacement value → must reconstruct in conformity; ≤50% may be restored if permits started within 180 days	§ 17.620.100.B.1.a–b
Nonconforming parcel development criteria	Parcel may be developed if it was recorded, created by deed pre‑amendment, approved by variance, created by prior lot line adjustment, or reduced by gov’t acquisition within limits	§ 17.620.060.B.1–5
Parking for pre‑existing uses	Existing sites retain conforming status for parking; additional parking required only for additions or when a change requires ≥15% more spaces	§ 17.620.080.A.1–2

Practical guidance & interplay with other reviews

When you propose repairs or enlargement, expect the Planning Director to ask for proof that the use or structure was lawful when established — gather historic permits, tax records, business receipts, or dated photos (§ 17.620.020) .
If your work triggers design or site review (for example, Architectural Design and Site Development Review), coordinate the nonconforming request with the Lompoc Design Review process because larger structural changes to nonconforming buildings may require those findings (§ 17.620.050.B.2.b) .
If you will be adding parking, review the City Lompoc Parking standards: additional parking is required only for the addition or where a use change increases parking demand significantly; the review authority may waive parking for additions under narrow circumstances (§ 17.620.080) .
For setbacks and dimensional compliance upon reconstruction or enlargement, consult the Lompoc Development Standards and Chapter 17.304 site standards; nonconforming expansions cannot increase the degree of nonconformity and must meet applicable zone standards for new construction (§ 17.620.050.A, § 17.304.050) .
Overlays matter: verify whether an overlay (for example the H Street Overlay) applies because overlays can modify the nonconforming reconstruction rules — see Lompoc Overlay Districts and § 17.620.100.B.1.d for the HSO exception .
Structural upgrades necessary to comply with the Building and Fire Code (for example seismic retrofits) are permitted even if they change the structure, because code compliance work is explicitly allowed; coordinate with the Building Official and the California Building Standards Code pathway for permits (§ 17.620.050.C) .
If you are considering creating a new dwelling (e.g., an accessory dwelling unit), verify ADU law interactions — the City’s ADU guidance and the State ADU rules may limit how local nonconforming conditions can be conditioned; see the City ADU page Lompoc ADUs and note Chapter 17.620 limits on intensification and enlargement when adding units (§ 17.620.040.B, local ADU guidance) .

Checklist (what an applicant must satisfy to preserve / modify a nonconformity)

Provide documentary proof the use/structure/parcel was lawfully established and remains continuous (per § 17.620.020)
Demonstrate proposed work will not enlarge or intensify the nonconforming use (unless limited Director approval for 25% gross floor increase is requested and justified) (§ 17.620.040.A–B)
If proposing structural repairs to non‑residential or multi‑family buildings, keep annual work under 50% of current market value unless Architectural Design & Site Development Review or Conditional Use Permit findings are approved (§ 17.620.050.B.2.a–b)
If work is for safety or code compliance (seismic, fire, Building Code), document Building Official findings and required permits (§ 17.620.050.C)
If the nonconforming use has been discontinued, document continuous operation to avoid the 3‑year discontinuance rule; apply for an Administrative Use Permit before the three‑year deadline if necessary (§ 17.620.100.A.1–2)
Confirm whether the parcel is on any Old Town registries or in an overlay that changes the rules (e.g., OTC / HSO) and include overlay compliance packages as required (§ 17.620.090.D, § 17.620.100.B.1.d)

Risks & Ambiguities

Issue	Why it matters	What to verify
Proof of legal nonconformity	Director must be satisfied; lack of evidence can mean denial and enforcement	Collect permits, dated photos, tax records; ask the Director early; see § 17.620.020
Three‑year discontinuance rule	Continuous closure > 3 years terminates rights	Document continuous operation or file for an Administrative Use Permit to extend the period before expiration (§ 17.620.100.A)
>50% destruction test	If involuntary damage repair cost > 50%, must rebuild to current Code	Obtain cost estimates and Building Official input quickly; permits must begin within 180 days for ≤50% restoration (§ 17.620.100.B.1.a–b)
“Increase degree of nonconformity” phrase	Subjective at times — what counts as an increase varies by project	Verify scope with Planning Director and tie proposed changes to specific Code standards § 17.620.050.A/B
Overlays and registries (OTC / HSO / Old Town)	Alterations in overlays can allow or restrict reinstatement	Check overlay map and registry status early; HSO has explicit rebuild allowance (§ 17.620.090.D, § 17.620.100.B.1.d)

Plain-English Summary

If your Lompoc property was legal under older rules but no longer meets current zoning, you can usually keep and maintain it, but you can’t intensify it or expand it much — repairs are allowed (with limits), you lose protection if you stop operating for three years or if the building is mostly destroyed, and special exceptions apply in Old Town and the H Street Overlay; always start by proving the property was legal when created and talk to the Planning Director before doing work (§ 17.620.010–§ 17.620.100) .

Source References

Lompoc Municipal Code, Title 17 — Chapter 17.620, “Nonconforming Uses, Structures, and Parcels”: § 17.620.010 (Purpose)
Proof and continuation: § 17.620.020, § 17.620.030
Nonconforming uses: § 17.620.040 (limits on expansion, intensification, replacement)
Nonconforming structures: § 17.620.050 (repairs, 50% market‑value rule, OTC/HSO exceptions)
Nonconforming parcels: § 17.620.060 (legal building site criteria)
Landscaping and parking rules for existing nonconformities: § 17.620.070, § 17.620.080
Exemptions and Old Town registries: § 17.620.090 (HSO and Old Town registry notes)
Loss of status and destruction rules: § 17.620.100 (3‑year rule, destruction thresholds, residential rebuild timing)
Industrial zone dimensional table and related standards: § 17.216.040 (Table 17.216.040.A)

Sources

Retrieved passages

Lompoc Zoning Code (§ 11) High relevance
CBC § 11 (§ 11) High relevance
CFC § 11 (§ 11) High relevance
Lompoc Zoning Code High relevance
CBC § 11 (§ 11) High relevance
CBC § 11 (Section 17.620.100.B.1.c) High relevance
CFC § 11 (§ 11) High relevance
Lompoc Zoning Code (Section 17.620.100.B) High relevance

Cited sections

Official Lompoc code library

Frequently asked questions

What proof does the City require to show a use or structure is legally nonconforming?

You must provide sufficient documentary evidence to the Director (permits, deeds, dated photos, receipts) so the Director can determine legal nonconformity; if no building permit is on file, evidence showing the structure predates 1965 allows the Director to make a best‑effort legal determination (§ 17.620.020)

Can I expand a nonconforming commercial use in Lompoc?

Generally no: a nonconforming use may not be enlarged beyond its pre‑existing footprint or capacity, except the Director can approve up to a 25% gross floor area expansion if that change brings the use into greater conformity with the Code (§ 17.620.040.A)

If my nonconforming building is damaged in a fire, can I rebuild it as it was?

If involuntary damage repair is 50% or less of replacement value, you may restore it if permits are obtained and restoration begins within 180 days; if damage exceeds 50%, reconstruction must meet current Code unless a specific residential or HSO exception applies (§ 17.620.100.B.1.a–b, c–d)

How does the three‑year discontinuance rule work?

If a nonconforming use or structure is discontinued for a continuous three years, its legal nonconforming status terminates. The Director may consider evidence of continual reuse efforts, or the owner can apply for an Administrative Use Permit before the deadline to extend protection (§ 17.620.100.A.1–2)

Can I do major repairs on a nonconforming multi‑family or commercial building?

Yes, but repairs, maintenance, and additional improvements for multi‑family (triplex+) and nonresidential structures are capped at 50% of the structure’s current market value (per the Code) unless the review authority approves a larger project through design/site review and makes findings that the work benefits the City (§ 17.620.050.B.2.a–b)

Does parking for an existing nonconforming use have to be retrofitted to current parking standards?

Not automatically. Existing conforming parking remains conforming. Additional parking is required only for additions or if a change in use increases parking need by 15% or more; the review authority can waive parking for an addition under limited circumstances (§ 17.620.080.A.1–2)

Are there special rules in Old Town or overlays that change nonconforming rights?

Yes. Some Old Town registry lots (drive‑throughs, auto uses) are exempt from § 17.620.040, and overlays like the H Street Overlay (HSO) have explicit rebuilding exceptions allowing structures to be rebuilt “as they existed” provided Building and Fire Code requirements are met (§ 17.620.090.D, § 17.620.100.B.1.d)

If I want to replace a nonconforming use with another nonconforming use, is that allowed?

Within multi‑tenant commercial or industrial centers, replacement by a similar or less intensive nonconforming use may be allowed if the Director finds it will not adversely affect adjacent properties and the center has not been vacant or discontinued 3 years or more (§ 17.620.040.D)

Do rules differ for nonconforming parcels (substandard lots)?

Yes. A nonconforming parcel can be built on if it meets at least one legal‑creation criterion (recorded subdivision, deed recorded pre‑amendment, previously approved variance, lot line adjustment predating amendment, or limited gov’t acquisition reductions) — see § 17.620.060.B.1–5

If I need to do seismic upgrades or other safety work, will that destroy nonconforming status?

No — repairs, alterations, or reconstruction to meet seismic, Building Code, or Fire Code requirements are allowed even if they affect the structure, provided the Building Official determines the work is exclusively for code compliance (§ 17.620.050.C)

Ask about any Lompoc property

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

Start Free Trial