Local zoning · Brea

Brea — Nonconforming Uses

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

Last reviewed: July 1, 2026

Overview

Brea regulates nonconforming uses, structures, and lots in Title 20 of the City of Brea Zoning Code. The rules let lawfully established uses or structures that no longer meet current zoning standards continue—but tightly limit expansion, location changes, and what happens after damage, discontinuance, or a change of use. See the city’s Brea Zoning and Brea Development Standards pages for context.

What “nonconforming” means in Brea

Brea declares the intent of Chapter 20.24 to allow nonconformities to continue “until they are removed or required to be terminated,” while discouraging enlargement or extension of those nonconformities.
Key definitions are in § 20.00.070:
- Nonconforming building: A building designed/erected for a use that no longer conforms to the use regulations of the district but was legal when established.
- Nonconforming lot/parcel: A legal lot or subdivision that no longer meets current standards due to later ordinances. Note: the definitions cross-reference “Chapter 20.72 (Nonconforming Uses, Structures, and Parcels),” which was not retrieved; use Chapter 20.24 for operative rules in the materials provided.
- Nonconforming structure/use: A lawfully established structure/use that later became out of compliance with current standards.

Citywide nonconforming rules (Title 20, Chapter 20.24)

Adding new uses/structures on a site with a nonconformity is limited: each existing and new use/structure must independently meet required area, yards, and open space; extra conforming structures tied to future lot splits aren’t allowed until the split is recorded.
Changing to another nonconforming use is generally prohibited unless this chapter expressly allows it.
Nonconforming land use may continue but cannot enlarge, move on the lot, or resume after a 6-month cessation.
Nonconforming use in a structure may continue but structures cannot be enlarged/altered except to change to a permitted use; Planning Commission may allow a change to another nonconforming use if the new one is “no more detrimental,” with conditions. Abandonment of a nonconforming use for 6 months ends the right to continue.
If a nonconforming use is replaced by a permitted use, the nonconforming use cannot resume.
Where use nonconformity applies to structure and land, removal/destruction of the structure compels discontinuance of the land use if damage exceeds 50% of replacement cost.
Nonconforming structures may continue but may not be enlarged in a way that increases nonconformity; if destroyed more than 50% of replacement cost, reconstruction must conform; moving a structure triggers full conformance. Limited repairs are allowed if they don’t increase cubic volume and the aggregate cost doesn’t exceed the current assessed value of improvements.
Replacement cost is presumed to equal 4× assessed value unless proven otherwise.
Completion of building provisions define when “actual construction” has started for vested rights.
Public uses (schools, parks, libraries, fire stations) may add/alter if within the original site and without infringing required parking.
Off-street parking/loading that is nonconforming limits expansions unless new/expanded facilities meet current requirements; however, a single-family dwelling may expand without adding spaces if the addition is the lesser of 500 sq ft or 25% of the original floor area.
Uses established under a variance or (minor) conditional use permit are not treated as nonconforming and may continue per their conditions; further expansion requires a new permit per § 20.408.030.
Conduct that terminates a nonconforming use includes changing to a prohibited use, enlarging area/volume devoted to the use, or adding another use except as allowed here.
The City Council may revoke nonconforming status after notice and hearing.
Public utilities are broadly exempt from termination requirements provided no change of use or enlargement of the used areas occurs.
Nonconforming signs may continue, but any structural change needing a permit requires a conditional use permit with findings that changes reduce nonconformity and improve aesthetics. See also Brea Signage.
Residential “lots of record” that undershoot today’s dimensions can still be developed with a dwelling and accessory buildings if yards/open space are met (or varied). See also Brea Variances and Exceptions.

How nonconforming rules interact with Brea districts

Nonconforming standards apply across all districts; what “conforming” looks like depends on each base zone’s purpose and dimensional rules. Below are Brea’s commonly encountered districts, to help you gauge whether your use/structure is truly nonconforming and what “full compliance” would require if triggered.

R-1 (5,000) Single Family Residential — § 20.212

Purpose: Provide medium-density single-family housing.
Typical permitted uses: “Uses permitted … are contained in Chapter 20.11.” Not found in retrieved materials.
Key dimensional standards: 5,000 sq ft min lot; widths 50–65 ft; depth 90 ft; max height 35 ft for primary structures and 18 ft for detached accessory; yards per § 20.212.040.
Where it applies: Citywide single-family areas; any reconstruction to conformity would use R‑1(5,000) standards shown above.

R-3 Multiple Family Residential — § 20.220

Purpose/permitted uses: See Chapter 20.11 for use lists. Not found in retrieved materials.
Key dimensional standards: Min lot area 10,000 sq ft; widths 75 ft interior/85 ft corner; depth 120 ft; unit density 1 per 1,750 sq ft; tiered max height 35/50/75 ft depending on proximity to lower-density zones.
Where it applies: Multi-family neighborhoods; if a nonconforming apartment is damaged >50% replacement cost, reconstruction would have to meet these R‑3 metrics.

C-G General Commercial — § 20.236

Purpose: General commercial and highway-related uses.
Permitted uses: “Contained in Chapter 20.11.” Not found in retrieved materials.
Key dimensional standards: Min lot 6,000 sq ft; front setback 10 ft; 35 ft height; 40 ft setback from residential boundaries plus a 6–7 ft wall at the boundary.
Where it applies: Commercial corridors, including highway frontages referenced in MU tables below.

C-C Major Shopping Center — § 20.232

Purpose/permitted uses: Use list in Chapter 20.11. Not found in retrieved materials.
Key dimensional standards: Enclosed operations; special conditions for walls/noise; site-level plan review required per § 20.408.040; floor area ratio subject to the General Plan.
Where it applies: Larger shopping centers; any nonconforming intensification would be limited by plan review and FAR policies.

C-RC Commercial Recreation — § 20.244

Purpose: Areas for commercial recreation.
Key dimensional standards: Min lot 1 acre (public utilities may be 20,000 sq ft); width 200 ft; height 35 ft; front yard 35 ft (front 15 ft landscaped); 100 ft side/rear next to residential.
Uses: See Chapter 20.11. Not found in retrieved materials.

C-P Commercial, Administrative, and Professional — § 20.224

Purpose/uses: See Chapter 20.11. Not found in retrieved materials.
Key dimensional standards: Height 30 ft; front/streetside yards 15 ft; abutting residential: yard of 10 ft plus 1 ft per foot of building height above 10 ft; walls/fencing standards apply.

M-1 Light Industrial — § 20.252

Purpose/uses: See Chapter 20.11. Not found in retrieved materials.
Key dimensional standards: Performance standards in Chapter 20.20 apply; CUP required for M‑1 sites within 300 ft of “R” zones/residential neighborhoods with >20 parcels.
Where it applies: Industrial districts; expansions of nonconforming operations must also satisfy Performance Standards.

M-2 General Industrial — § 20.256

Purpose/uses: Uses per Chapter 20.11 and M‑1 performance standards apply.
Key dimensional standards: Where M‑2 abuts other industrial/commercial zoning, maintain a 50 ft yard (parking allowed in that yard); hazardous waste facilities: 1,000 ft from “sensitive population” property lines.

Mixed-Use Districts (MU‑I, MU‑II, MU‑III) — § 20.258

Purpose: Mix residential and nonresidential uses, with vertical/horizontal integration; incentives for lot consolidation.
MU‑I key standards: Residential density 12.1–50 du/acre; nonres FAR 3.0; many front/street setbacks “None” on key corridors; parking area setbacks 5 ft.
MU‑II key standards: Max height 60 ft; parking/front/street setbacks often 15 ft; open space minimums apply.
MU‑III key standards: Residential density 6.1–18 du/acre (or to 14 du/acre for stand-alone res per § 20.258.030.A.4); FAR 1.0; max height commonly 35 ft; frontage rules along Brea Blvd and Imperial Hwy.
Where it applies: Downtown/corridors; tables reference Ash St, Birch St, Brea Blvd, Imperial Hwy, indicating focus areas where nonconforming storefronts may face unique setback/no-parking-at-front rules.

PF Public Facilities — § 20.261

Purpose: Allocate land for public institutions, utilities, and facilities.
Dimensional standards: Case-specific, subject to City Planner review and plan review.
Where it applies: Civic/infrastructure sites; note the separate nonconforming public-use expansion rule in § 20.24.090.

For overlays and special districts, see Brea Overlay Districts. Historic resource sites may also have special procedures (see Brea Historic Preservation).

Decision map: Key nonconforming standards

Topic	Brea rule	Code Reference
Intent	Allow continuation until removal/termination; discourage enlargement/extension	§ 20.24.010
Add new uses/structures on a site with a nonconformity	Each use/structure must meet required area/yards/open space; no “pre-split” add-ons	§ 20.24.020
Change to another nonconforming use	Only as expressly allowed; PC may allow if “no more detrimental,” with conditions	§ 20.24.030, § 20.24.050(B)(3)
Nonconforming land use	No enlargement/moving; ceases if idle > 6 months	§ 20.24.050(A)
Nonconforming use in a structure	No enlargement; abandon > 6 months ends rights	§ 20.24.050(B)(1),(5)
If nonconforming use replaced by a permitted use	Nonconforming use may not resume	§ 20.24.050(B)(4)
Damage/destruction threshold	> 50% replacement cost → must conform on rebuild	§ 20.24.050(B)(6)
Replacement cost presumption	4× assessed value	§ 20.24.070
Nonconforming structures	No enlargement increasing nonconformity; move → must conform; repairs limited by assessed value and no cubic increase	§ 20.24.060(A)
Completion/vesting	Defines when “actual construction” starts	§ 20.24.080
Public-use additions	OK if within original site and without infringing required off‑street parking	§ 20.24.090
Nonconforming parking	Expansion only if new/expanded parts meet current parking; SFD exception: expand up to 500 sf or 25% without adding spaces	§ 20.24.100(A)–(B)
CUP/Variance uses	Not “nonconforming”; may continue per permit; future expansion needs new approval	§ 20.24.110; § 20.408.030
Termination by conduct	Change to prohibited use; enlarge area/volume; add uses	§ 20.24.120
Revocation	Council may revoke/modify after noticed hearing	§ 20.24.150
Public utilities	Broad exemption from termination limits (no change of use/no enlargement)	§ 20.24.160
Nonconforming signs	Structural change needs CUP; must reduce nonconformity and improve aesthetics	§ 20.24.135; § 20.408.030

Note: § 20.24.060(B) requires a nonconforming structure to meet all then‑applicable requirements if its utilization changes to a different use category, including references to Building and Fire Codes; for those technical codes see California Building Standards Code.

Checklist

Confirm the use/structure/lot was lawful when established (retain permits, approvals, assessor records).
Identify the underlying district and its current standards to understand what “conforming” means (e.g., R‑1 (5,000) min 5,000 sq ft lot; C‑G 10 ft front yard; MU corridor setbacks).
Verify no enlargement/extension of the nonconforming aspect is proposed.
Check for discontinuance: any 6-month cessation of a nonconforming use ends rights.
If damaged, document replacement cost; presume 4× assessed value unless you prove otherwise; damage > 50% compels conformity.
For a change to a different nonconforming use, seek Planning Commission approval with findings the new use is no more detrimental; expect conditions.
For single-family additions, assess the parking exception (≤ 500 sq ft or 25% expansion without adding spaces).
For nonconforming signs, plan for a CUP and findings that modifications reduce nonconformity and improve aesthetics.
If prior approvals exist (variance/(minor) CUP), confirm the use isn’t “nonconforming” and follow permit conditions; expansions need new approval.
Coordinate with Brea Design Review if your district or project type requires plan review.

Risks & Ambiguities

Issue	Why it matters	What to verify
Replacement cost calculation	Determines whether the 50% destruction threshold compels full conformance	Whether to use the presumption 4× assessed value or provide proof; appraisal methodology acceptable to the City. § 20.24.070
“Increase in nonconformity”	Small alterations can inadvertently expand nonconforming conditions	Whether any change increases cubic volume or worsens setback/FAR/height nonconformity; repair limits tied to assessed value. § 20.24.060(A)(1),(4)
6-month discontinuance	A gap in operations can forfeit rights	How the City measures cessation and what evidence proves continuous use. § 20.24.050(A)(3), (B)(5)
“No more detrimental” finding for use changes	Discretionary standard affects feasibility of swapping to a different nonconforming use	Applicable performance standards, neighborhood context, and possible conditions the Planning Commission may impose. § 20.24.050(B)(3)
Parking when expanding homes	Triggers for additional spaces can stall additions	Apply the SFD exception correctly (≤ 500 sq ft or 25%), and confirm current [parking] standards for any other expansions. § 20.24.100(B)
Definitions cross‑reference to Chapter 20.72	The definitions mention Chapter 20.72 for nonconforming topics	Operative nonconforming provisions in retrieved materials are in Chapter 20.24; confirm with staff which chapter controls your case. § 20.00.070; Chapter 20.24

Plain-English Summary

If your Brea property was legal when built but doesn’t meet today’s zoning, you can usually keep using it as-is—but you can’t expand the nonconforming part, you can’t restart a use after 6 months of stopping, and if a building is more than 50% destroyed you must rebuild to current code. Some public and sign-related exceptions exist, and single-family homes get a small parking break for modest additions. When in doubt, ask before you change anything significant.

Source References

Brea Zoning Code Title 20, Chapter 20.24 (Nonconforming Structures and Uses): §§ 20.24.010–.170 (intent; adding uses; change to another nonconforming use; nonconforming land/structures; cost of replacement; completion; public use additions; nonconforming parking; approvals under CUP/variance; conduct terminating; termination; nonconforming signs; annexed structures; revocation; public utility exemption; maintenance).
Brea Zoning Code § 20.00.050 (Existing uses) and § 20.00.070 (Definitions: nonconforming building/lot/parcel/structure/use).
Selected districts for conformance benchmarks:
- R‑1 (5,000) § 20.212.010–.040.
- R‑3 § 20.220.040.
- C‑G § 20.236.010–.040.
- C‑C § 20.232.040–.050.
- C‑RC § 20.244.010–.040.
- C‑P § 20.224.040.
- M‑1 § 20.252.050–.060; Chapter 20.20.
- M‑2 § 20.256.010–.060.
- Mixed‑Use § 20.258.010–.030, Tables 2‑3 to 2‑8.
- Public Facilities § 20.261.010–.040.
Related Brea topics referenced: Brea zoning & planning overview, Brea Land Use, Brea Development Standards, Brea Parking, Brea Design Review, Brea Overlay Districts, Brea Historic Preservation, Brea Signage, Brea Variances and Exceptions, Brea ADUs, California Building Standards Code.

Sources

Retrieved passages

Brea Zoning Code (§ 20.24.050) High relevance
Brea Zoning Code (§ 20.24.050) High relevance
Brea Zoning Code (title when) High relevance
Brea Zoning Code (§ 20.24.090.) High relevance
CFC § 20.24.060 (title for) High relevance
Brea Zoning Code (§ 20.24.135.) High relevance
Brea Zoning Code (§ 20.20.070) High relevance
Brea Zoning Code (§ 20.24.110.) High relevance
Brea Zoning Code (§ 20.00.010) Medium relevance
Brea Zoning Code (§ 66314) Medium relevance
Brea Zoning Code (Title 47) Medium relevance
CBC § 66314 (§ 66314) Medium relevance
Brea Zoning Code (§ 20.256.020.) Medium relevance
Brea Zoning Code (§ 20.408.030) Medium relevance
Brea Zoning Code (§ 20.408.040.) Medium relevance
Brea Zoning Code (§ 20.258.030) Medium relevance
Brea Zoning Code (§ 20.258.020) Medium relevance
Brea Zoning Code (§ 20.258.020) Medium relevance
Brea Zoning Code (Section 20.08.035F) Medium relevance
Brea Zoning Code (§ 20.56.050.) Medium relevance
Brea Zoning Code (Section 20.08.035F) Medium relevance
Brea Zoning Code (§ 20.212.030.) Medium relevance
CBC § 20.56.040 (§ 20.56.040) Medium relevance
Brea Zoning Code (§ 20.228.040) Medium relevance
Brea Zoning Code (§ 20.206.024) Medium relevance
Brea Zoning Code (Chapter 20.424.) Medium relevance
Brea Zoning Code (§ 20.258.020) Medium relevance
Brea Zoning Code (Title 20) Medium relevance
Brea Zoning Code (§ 20.228.010.) Medium relevance
Brea Zoning Code (§ 20.260.020.) Medium relevance
Brea Zoning Code (section shall) Medium relevance

Cited sections

Official Brea code library

Frequently asked questions

Can I enlarge a nonconforming house in Brea?

Typically no—alterations can’t increase the nonconformity (e.g., push further into setbacks). Limited repairs are allowed without increasing cubic volume and within cost limits, but enlargements that intensify nonconforming elements are prohibited. If destroyed beyond 50% of replacement cost, a rebuild must fully conform. § 20.24.060(A) and § 20.24.070

If a nonconforming use closes for a while, when do I lose my rights?

If a nonconforming land or structural use ceases for more than six consecutive months, the right to continue is lost and any new use must conform. § 20.24.050(A)(3), (B)(5)

Can I switch from one nonconforming use to another?

Only if the Planning Commission finds the new use is no more detrimental to the zone than the existing one; conditions may be imposed. Otherwise, changes to another nonconforming use are not allowed. § 20.24.030; § 20.24.050(B)(3)

What happens if my nonconforming building is more than 50% damaged?

If damage exceeds 50% of replacement cost, the structure can’t be reconstructed except in full conformance. Replacement cost is presumed at four times the assessed value unless you prove otherwise. § 20.24.060(A)(2); § 20.24.070

Do I need to add parking when adding onto a nonconforming single-family home?

Not necessarily. Brea allows expansion of a single-family dwelling without adding spaces if the increase is the lesser of 500 sq ft or 25% of the original residential floor area. § 20.24.100(B)

Are uses with a conditional use permit considered nonconforming?

No. Uses and buildings operating under a variance or (minor) conditional use permit are not considered nonconforming and can continue under their terms; expansions require new approvals. § 20.24.110; § 20.408.030

Can public facilities that are nonconforming expand?

Yes, if the addition stays within the site that existed when the use became nonconforming and doesn’t infringe required off-street parking. § 20.24.090

What are the common triggers that terminate a nonconforming use?

Changing to a use not permitted in the zone (without approval), enlarging the nonconforming area/volume, or adding another use, will terminate nonconforming rights. § 20.24.120

Do nonconforming signs have special rules?

They may remain, but any structural change needing a permit requires a conditional use permit with findings that the change reduces nonconformity and improves aesthetics. § 20.24.135; § 20.408.030

Can I build on a small R‑1 (5,000) lot that doesn’t meet today’s standards?

Yes—lots of record in residential zones may be developed with a dwelling and accessory buildings if yard/open space standards are met (or varied). § 20.24.040

Ask about any Brea property

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

Start Free Trial