Local zoning · Lincoln

Lincoln — Nonconforming Uses

Q: If my nonconforming building is damaged in a fire, can I rebuild it to the same size?

If damage is ≤ 50% of the building’s value at the time, you may restore and resume the prior occupancy (must start within one year and diligently proceed). If damage exceeds 50% , any repairs must bring the entire building into conformity with current district standards ( § 18.50.040 ).

Q: How long can a nonconforming commercial use continue in Lincoln?

For a nonconforming use of a main building , the code sets a 5‑year discontinuance deadline counting from when the use became nonconforming or the ordinance’s effective date, whichever is later ( § 18.52.020 ). For nonconforming land uses, other specific 3‑year rules may apply in some cases ( § 18.48.020 ).

Q: Are ADU permits blocked by a nonconforming zoning condition on my lot?

Lincoln’s ADU chapter notes the city may or may not require correction of a nonconforming zoning condition prior to ADU construction; state ADU law also restricts the city’s ability to deny ADUs solely due to nonconforming zoning conditions in many cases — confirm with staff ( § 18.37.030(4) ).

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

Ask a question free See coverage

Last reviewed: July 2, 2026

Overview

Lincoln’s zoning ordinance is codified in Title 18 - ZONING; it treats nonconforming uses, lots and structures as temporary vestiges that should not be expanded and generally must be eliminated over time. The rules that control continuation, repairs, restoration after damage, abandonment and possible legalization are found across Division V (Chs. 18.46–18.52) and the airport/height rules in Ch. 18.76; read together they set the city’s baseline rules for what you may keep, repair, or restore and what triggers loss of nonconforming status (see § 18.46.010, § 18.48.010, § 18.50.010, § 18.52.020, and § 18.76.020) .
If you are proposing changes that interact with parking, setbacks/development standards, design review, overlay districts, or ADUs, expect those other chapters to apply as well — see Lincoln Parking, Lincoln Development Standards, Lincoln Design Review, Lincoln Overlay Districts, and Lincoln ADUs for those topic-specific rules. Also remember construction still must meet the California Building Standards Code.

(First mention links: Lincoln Parking, Lincoln Development Standards, Lincoln Design Review, Lincoln Overlay Districts, Lincoln ADUs, California Building Standards Code.)

What the Lincoln code actually says — plain-English breakdown (district-by-district)

The city lists the following zoning districts in § 18.06.010; each district’s permitted uses and dimensional rules determine whether an existing use/structure/lot is nonconforming and what remedies exist. The entries below summarize the ordinance material specific to each district (purpose, typical permitted uses, key dimensional standards) and where the district applies. If a particular district chapter text was not found in the retrieved file excerpts, that is explicitly noted.

Note: each district name below is shown in bold (the code uses the exact district labels) and the controlling chapter numbers are stated where the ordinance provides them.

R-1 (Single-Family Residential) — Chapter 18.12

Purpose & common uses: Single-family dwellings, accessory buildings, ADUs, home occupations, transitional/supportive housing; manufactured homes per state law are allowed. See § 18.12.010.
Key dimensional standards: Maximum structure height 35 ft (principal), accessory height 16 ft; minimum lot area 6,000 sf, lot width 50 ft, front setback 20 ft, max lot coverage 60% (see § 18.12.030–§ 18.12.070).
Where it applies: standard single-family neighborhoods shown on the official zoning map (see § 18.08.010).

R-2 (Duplex Residential) — Chapter 18.14

Purpose & common uses: two‑unit residential buildings, accessory uses and ADUs; duplex/triplex specifics appear here (see § 18.14.).
Key dimensional standards: minimum lot area 6,500 sf (interior), lot coverage 50%, minimum front yard 25 ft, side yard 5 ft, development standards for conditional uses (e.g., max height 45 ft for conditional uses) in § 18.14.050–§ 18.14.090.

R-3 (Multiple Residential) — Chapter 18.16

Purpose & common uses: apartments, multi-family, condominiums, mobile home parks, boardinghouses, ADUs, supportive housing (see § 18.16.010).
Key dimensional standards: max principal height generally 35 ft (with adjustments tied to side yard) and other lot/unit area rules in § 18.16.030–§ 18.16.070.

R-E (Residential Estate) — Chapter 18.18

Purpose & common uses: larger lot/residential estate uses — larger minimums to preserve low-density/agricultural-like residential uses.
Key dimensional standards: minimum lot area: 2.5 acres, front yard 25 ft, height 35 ft, lot coverage 30% (see § 18.18.040–§ 18.18.090).

B-P (Business & Professional) — Chapter 18.20

Purpose & common uses: offices, personal services, financial institutions, accessory uses; some residential uses allowed by CUP (see § 18.20.010–§ 18.20.020).
Key dimensional standards: lot coverage 60%, front yard 20 ft, rear yard 5–10 ft depending on adjacency, min lot widths 50 ft; conditional-use development standards include max height 45 ft for conditional uses (see § 18.20.060–§ 18.20.090).

C (Commercial) — Chapter 18.22

Purpose & common uses: shopping centers, quick‑food, florists, collection facilities, ADUs in multi‑family contexts, etc. See § 18.22.010.
Key dimensional standards: maximum height 50 ft (civic overlay 75 ft), min lot area 2,500 sf, lot coverage 60%, front/side/rear yards: none required except 10 ft when adjacent to residential (see § 18.22.040–§ 18.22.090).

H-C (Highway Commercial) — Chapter reference in § 18.06.010

The district is listed among zones in § 18.06.010, but the specific chapter text for H-C did not appear in the retrieved excerpts. Not found in retrieved materials; Verify with the jurisdiction for its permitted uses and dimensional table.

L-I (Light Industrial) — Chapter 18.26

Purpose & common uses: automobile repair/body shops, heavy equipment service/sales, tire shops, indoor manufacturing (many uses conditioned to be inside buildings), kennels up to specified limits (see § 18.26.010–§ 18.26.020).
Key dimensional standards: see district chapter for site plan and yard rules; where an alteration increases intensity, nonconforming rules may apply.

I (Industrial) — Chapter reference in § 18.06.010

The district appears in the district list but specific chapter text for I did not appear in the retrieved excerpts. Not found in retrieved materials; Verify with the jurisdiction.

A-D (Agricultural) — Chapter 18.29

Purpose & common uses: agricultural production, one single‑family dwelling, accessory structures, ADUs, greenhouses, livestock with setback rules (see § 18.29.010).
Key dimensional standards: setbacks for animal structures (e.g., 75 ft from property lines in many cases), limits on on‑site marketing stands, and other ag‑oriented operational rules.

O-S (Open Space) — Chapter reference 18.30

The Open Space district is designated in § 18.06.020, and CHAPTER 18.30 is listed as an open-space district; specific CHAPTER text was not present in the retrieved excerpts. Not found in retrieved materials; Verify with the jurisdiction.

PUB (Public Uses) — Chapter 18.31

Purpose & common uses: governmental & public service facilities (schools, utilities, corp yards), community water storage, solar facilities; design review and setbacks are specified (see § 18.31.020–§ 18.31.090).
Key dimensional standards: front/side/rear setbacks 20 ft, from residential zoning: 50 ft, min lot area ½ acre, height 35 ft (special rules for tanks).

PD (Planned Development) — Chapter 18.32

Purpose & common uses: flexible, project‑specific standards (preliminary dev. plan becomes the “general development plan” and controls allowed uses and intensity for that PD parcel) — see § 18.32.090–§ 18.32.110.

P (Parks) — Chapter 18.33

Purpose & common uses: parks, community centers, sports fields, recreation uses; conditional uses and dimensional rules (e.g., front/side/rear setbacks 20 ft; height 35 ft; min lot area 1 acre) are specified in § 18.33.020–§ 18.33.080.

Key decision-relevant standards (table)

Rule / trigger	Short practical rule	Code reference
Continuation policy (nonconformity intent)	Nonconforming uses/structures can't be expanded; intended to be eliminated over time.	§ 18.46.010
Nonconforming land use continuation limits	Nonconforming uses of land may continue but may not be expanded or changed; 12‑month vacancy rule stops reestablishment.	§ 18.48.010 (vacancy)
Required discontinuance in some cases	Certain nonconforming land uses must end within 3 years (e.g., no building on site).	§ 18.48.020
Parking when altering	If existing parking is insufficient, you cannot enlarge the building to add more seats/units unless additional parking is provided.	§ 18.48.030
Repairs limit for nonconforming buildings	Repairs/maintenance allowed but not exceed 25% of replacement cost in any 12‑month period.	§ 18.50.010
Additions / enlargement	No addition/enlargement of a nonconforming building allowed unless the addition and entire building conform to district regs.	§ 18.50.020
Restoration after damage	May restore if damage ≤ 50% of value; if >50%, entire building must be made conforming. Value determined by city engineer per building code.	§ 18.50.040
Nonconforming use in a main building	Nonconforming use of a main building must be discontinued within 5 years from the effective date it became nonconforming.	§ 18.52.020
Airport/height special rule	Permit cannot be granted to increase height or hazard of a nonconforming structure/tree that existed at adoption — airport overlay rules.	§ 18.76.020–§ 18.76.030

Checklist — what an applicant must satisfy to deal with a nonconforming use/structure/lot

Confirm district and zoning designation on the official zoning map (see § 18.08.010).
Establish whether the use/structure/lot was actually lawful when established and therefore a legitimate nonconformity (record of original permit/occupancy). See § 18.46.010.
Calculate whether prior repairs in the last 12 months exceed 25% of replacement cost (if proposing further repairs) — prepare repair cost evidence and valuation method for the city engineer. See § 18.50.010 and § 18.50.040.
If the project enlarges or adds floor area, confirm additional required off‑street parking will be provided before altering (see § 18.48.030). Link to Lincoln Parking.
If the use has been vacant, document continuous vacancy dates to check the 12‑month and 3‑year abandonment rules (§ 18.48.010, § 18.48.020, § 18.52.040).
If restoring after damage, get an appraisal/value determination and confirm whether restoration cost will exceed 50% (if >50% the building must be brought into conformance) (§ 18.50.040).
If seeking to legalize a nonconforming use via a conditional use permit, prepare findings and conditions (see § 18.46.040 and CU procedures Ch. 18.56).
If proposing height or other dimensional relief, consider a variance (city planner or planning commission) and supply any required FAA determinations where the airport overlay applies (§ 18.76.040, § 18.58.050).
For ADUs: check ADU chapter and whether the city requires correction of nonconforming zoning conditions prior to construction (ADU chapter acknowledges this). See Lincoln ADUs and § 18.37.030(4).

Risks & Ambiguities

Issue	Why it matters	What to verify
Vacancy clock (12 months)	A nonconforming use can be lost after continuous 12 months of vacancy — re‑establishment is barred. This can unexpectedly terminate legal use rights.	Verify continuous occupancy records and establish exact vacancy start/end dates (§ 18.48.010, § 18.52.040)
Repair cost threshold (25%)	Exceeding 25% replacement cost in a 12‑month window limits “repair” eligibility and may trigger further requirements.	Get a replacement‑cost estimate and compare documented repairs in the last 12 months (§ 18.50.010)
Damage/restoration threshold (50%)	If restoration cost or damage exceeds 50%, the ordinance forces full conformance — costly compliance trigger.	Obtain the city engineer’s valuation and budget options for full conformance vs. allowable restoration (§ 18.50.040)
Nonconforming land vs. building deadlines	Different clocks apply (some nonconforming land uses must end in 3 years, main building uses in 5 years) — misreading can cause surprise loss of rights.	Verify which rule applies: land use (Ch. 18.48) vs building use (Ch. 18.52) and date the use became nonconforming (§ 18.48.020, § 18.52.020)
ADUs and preexisting nonconformance	State ADU law limits local agencies’ ability to deny ADUs because of zoning nonconformance, but Lincoln’s ADU chapter notes the city “may or may not” require correction.	Talk to staff: confirm whether the city will require correction before ADU permits on a particular lot (§ 18.37.030(4)).
Airport overlay / height rules	Airport zoning rules prevent permits that increase the height/hazard of a nonconforming structure/tree — an overlooked airport overlay can block projects.	Confirm whether property lies in the airport overlay and check § 18.76.020–§ 18.76.030 and any FAA findings required.
Ambiguity in “when it became nonconforming”	Many deadlines and allowances hinge on the date the use/structure became nonconforming; records may be incomplete.	Obtain historic permits, aerials, business licensing/utility records and consult the Community Development Director if ambiguous (CDD interpretation authority § 18.04.050).

Plain-English Summary

Lincoln’s zoning code treats nonconforming uses as temporary and limited: you may maintain and make modest repairs (subject to a 25% per‑12‑month cap) and under narrow circumstances restore after damage (allowed if damage ≤ 50% of value), but you generally cannot enlarge or extend the nonconforming use or structure and certain vacancy/abandonment deadlines (12 months, 3 years, or 5 years depending on the rule) will extinguish the right to continue the use — see § 18.46 through § 18.52 for the specific rules and § 18.76 for airport height constraints.

Source References

Lincoln Municipal Code, Title 18 — ZONING, CH. 18.46 (Nonconformity generally), § 18.46.010 (Intent)
CH. 18.48 (Nonconforming use of land), § 18.48.010–§ 18.48.030 (continuation, discontinuance, parking)
CH. 18.50 (Nonconforming buildings), § 18.50.010–§ 18.50.040 (repair cap, additions, relocation, restoration)
CH. 18.52 (Nonconforming use of buildings), § 18.52.010–§ 18.52.040 (continuation, 5‑year rule, vacancy)
CH. 18.76 (Permits, variances and airport overlays), § 18.76.010–§ 18.76.030 (permit limits for nonconforming height/hazards)
District lists and individual district chapters cited above: § 18.06.010 and chapters 18.12 (R‑1), 18.14 (R‑2), 18.16 (R‑3), 18.18 (R‑E), 18.20 (B‑P), 18.22 (C), 18.26 (L‑I), 18.29 (A‑D), 18.31 (PUB), 18.32 (PD), 18.33 (P). See excerpts for each cited chapter.
City policy on ADUs and nonconforming conditions: CH. 18.37, esp. § 18.37.030(4) (may/may not require correction of nonconforming zoning condition before ADU).
Lincoln zoning & planning overview: Lincoln zoning & planning overview
Topic links used in-text: Lincoln Zoning, Lincoln Development Standards, Lincoln Parking, Lincoln Design Review, Lincoln Overlay Districts, Lincoln ADUs, California Building Standards Code

Sources

Retrieved passages

Lincoln Zoning Code (§1) High relevance
Lincoln Zoning Code (§1) High relevance
Lincoln Zoning Code (§1) High relevance
Lincoln Zoning Code (§5.02.000) High relevance
CBC § 5.03.030 (§5.03.030) High relevance
CBC § 5.03.000 (§5.03.000) High relevance
Lincoln Zoning Code (title or) High relevance
Lincoln Zoning Code (§ 1) High relevance
Lincoln Zoning Code (§ 1) Medium relevance
Lincoln Zoning Code (Chapter 18.72.) Medium relevance
CBC § 66314 (§ 66314) Medium relevance
Lincoln Zoning Code (§ 10) Medium relevance
Lincoln Zoning Code (Section 18.42.020.) Medium relevance
Lincoln Zoning Code (Title 18) Medium relevance
Lincoln Zoning Code (§2.03.020) Medium relevance
Lincoln Zoning Code (§3.05.070) Medium relevance
Lincoln Zoning Code (title and) Medium relevance
Lincoln Zoning Code (§3.03.030) Medium relevance

Cited sections

Official Lincoln code library

Frequently asked questions

What does Lincoln define as a “nonconforming use”?

A “nonconforming use” in Lincoln is any preexisting structure, object of natural growth or use of land inconsistent with the zoning ordinance or an amendment thereto; the ordinance declares nonconformities incompatible with permitted uses and not to be expanded (§ 18.46.010).

If my nonconforming building is damaged in a fire, can I rebuild it to the same size?

If damage is ≤ 50% of the building’s value at the time, you may restore and resume the prior occupancy (must start within one year and diligently proceed). If damage exceeds 50%, any repairs must bring the entire building into conformity with current district standards (§ 18.50.040).

Can I add an addition to a nonconforming house in Lincoln?

No — a building that is nonconforming as to use, lot area, or yard requirements shall not be added to or enlarged unless the nonconforming building, the addition, and the resulting use are all made to conform to the district rules (§ 18.50.020).

How long can a nonconforming commercial use continue in Lincoln?

For a nonconforming use of a main building, the code sets a 5‑year discontinuance deadline counting from when the use became nonconforming or the ordinance’s effective date, whichever is later (§ 18.52.020). For nonconforming land uses, other specific 3‑year rules may apply in some cases (§ 18.48.020).

My property is in Lincoln’s airport overlay and has a nonconforming tall structure — can I get a permit to make it taller?

No — permits that would allow a nonconforming structure or tree to be made higher or become a greater hazard to air navigation than it was on the ordinance effective date are not allowed; some limited maintenance that does not increase height is permitted (§ 18.76.020–§ 18.76.030).

Will Lincoln force me to remove a nonconforming use immediately?

Not typically. The ordinance contemplates continuation in many cases but prohibits expansion, sets repair/value thresholds, and includes abandonment/discontinuance timelines (12 months, 3 years, 5 years depending on the rule) — local enforcement and the planning commission/city council may require changes or use conditions, or convert a nonconforming use to a conforming one by issuing a CUP under § 18.46.040. Verify with planning staff for parcel‑specific enforcement.

If I want to legalize a nonconforming use, what is the path?

The city council may cause a nonconforming use to become conforming by issuing a conditional use permit after the planning commission hearing; the council will require conditions to make the use “as nearly conforming as possible” and must make written findings (§ 18.46.040 and Ch. 18.56 procedures).

Are ADU permits blocked by a nonconforming zoning condition on my lot?

Lincoln’s ADU chapter notes the city may or may not require correction of a nonconforming zoning condition prior to ADU construction; state ADU law also restricts the city’s ability to deny ADUs solely due to nonconforming zoning conditions in many cases — confirm with staff (§ 18.37.030(4)).

Who decides ambiguous questions about a nonconforming designation?

The Community Development Director (CDD) can issue administrative interpretations of Title 18 standards; interpretations are a written recordable action and may be appealed to the planning commission (§ 18.04.050). If still disputed, the planning commission or city council are the decision bodies.

Do off‑street parking rules apply to a nonconforming building I want to alter?

Yes. If the site’s current parking was insufficient under the code at the time of adoption (or none provided), you cannot alter/enlarge to add units/seat/area without supplying the additional off‑street parking required for that added capacity (§ 18.48.030). See Lincoln Parking for the parking standards that apply.

Ask about any Lincoln property

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

Start Free Trial