Local zoning · Morgan Hill

Morgan Hill — Nonconforming Uses

Q: If my nonconforming house is damaged, can I rebuild it the same way?

If the cost to repair or reconstruct exceeds 50% of the structure’s market value (assessor roll), then the replacement must meet current zoning requirements, except there is a residential reconstruction pathway that allows rebuilding as it existed with a Design Permit under specific involuntary-damage rules and a 24‑month start requirement. § 18.68.070.D–E .

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

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Last reviewed: July 2, 2026

Overview

This page summarizes what the Morgan Hill Municipal Code (Title 18) actually requires about nonconforming parcels, uses, and structures, how the city treats repairs, enlargement, abandonment, and reconstruction, and what findings the city relies on when allowing changes. For the local procedural context (design review, parking, overlays, ADUs, and development standards) see the linked City resources embedded below; specific nonconforming rules are drawn from Chapter 18.68 of the zoning code. § 18.68.010–.080 are the controlling local provisions.

Before you read: when this page mentions city programs like parking, design review, development standards, overlay districts, ADUs, California Building Standards Code, signage, or variances, the first natural mention is linked to the city topic for quick navigation: parking, design review, development standards, overlay districts, ADUs, California Building Standards Code, signage, and variances and exceptions.

What the Morgan Hill code requires (high level)

A legal nonconformity must have been physically established under the rules in effect when it was created; the applicant carries the burden of proof. § 18.68.030.
Nonconforming parcels (lots) are allowed to be developed but must comply with the current setbacks, coverage, parking, and other standards of the zone except where the code provides specific relaxations (for example, a 5% density reduction for multifamily on undersized lots). § 18.68.040.
Nonconforming uses of land may continue but cannot be enlarged, moved around the lot, or, in many cases, resume after prolonged cessation. Cessation rules differ by type (land uses: 90 days; structures: 6 months/12 months rules). § 18.68.050; § 18.68.060.
Alterations to nonconforming structures are tiered: minor maintenance generally needs no discretionary permit, structural work that affects the nonconforming aspect requires a Design Permit, and work that increases/exacerbates the nonconformity requires a Conditional Use Permit. Rebuilding after damage has a 50% market-value threshold. § 18.68.070.
To authorize intensification (enlargement or increased operation) the Community Development Director uses an Administrative Use Permit and must make additional findings. § 18.68.060.D; § 18.68.080.

District-by-district breakdown (where nonconforming rules apply)

Below are the primary Morgan Hill zoning districts where nonconforming situations commonly arise. For each district I summarize the district purpose, typical permitted uses, representative dimensional standards, and how Chapter 18.68 interacts with the district rules. For full district tables and exact numeric standards see the referenced code subsections and the Development Standards page.

Note: always confirm a parcel’s exact zoning on the City zoning map; transitional provisions and Planned Development overlays may change standards for a parcel. Verify with the jurisdiction. § 18.04.080.

Residential Detached Low / Medium / High (RDL, RDM, RDH)

Purpose: detached single-family housing at low-to-higher densities; preserve neighborhood character. See Chapter 18.40 / housing tables.
Typical permitted uses: single-family detached homes and typical residential accessory uses. § 18.40 (housing-type standards).
Key dimensional standards (representative): lot area minimums vary by housing type (e.g., 4,500–5,500 sq ft for some SFD types), front setbacks are commonly 10–15 ft, lot coverage caps (e.g., 45–50%) and height limits follow the base zone. See Chapter 18.40 table for exact numbers.
Nonconforming interaction: A legally established nonconforming structure in an RDL/RDM/RDH lot may be maintained and repaired per § 18.68.070; if reconstruction after damage exceeds 50% of market value, it must be rebuilt to current standards unless the residential exception applies. § 18.68.070.D–E.

Residential Attached (RAL, RAM, RAH)

Purpose: duplexes, townhomes, and other attached housing types; enable higher density. Chapter 18.40 / form-based housing tables.
Typical permitted uses: multi-unit residential, accessory uses (subject to ADU rules in Chapter 18.84).
Key dimensional standards: reduced lot widths (e.g., 24–40 ft for some attached types), variable front setbacks, specified lot coverage and FAR caps. See Chapter 18.40 tables for the applicable subtype.
Nonconforming interaction: If an attached building has setback or coverage nonconformities, routine maintenance and some structural work that do not worsen the nonconformity are permitted; enlargements that increase the nonconforming condition require discretionary approval per § 18.68.070 and § 18.68.060.D.

Neighborhood Commercial / General / Highway / Administrative Office (CN, CG, CH, CO)

Purpose: retail, services, offices, and mixed commercial activities with scale differences between CN and CH; see Chapter 18.24 and related tables.
Typical permitted uses: retail, restaurants, offices, some mixed-use residential (dependent on district). Use table symbols P / C / A indicate by-right, conditional, or admin-permit uses. § 18.08.040 explains those markers.
Key dimensional standards (representative): lot area minima (e.g., 6,000–20,000 sq ft by district), front setbacks commonly 20–40 ft, height caps (e.g., 30–55 ft depending on district). See Table 18.24-2 for exact values. § 18.24.030.
Nonconforming interaction: Outdoor uses and sign nonconformities are handled by separate chapters but the general nonconforming rules require that a nonconforming commercial use not be expanded across the site or moved to another portion of the lot. Intensification requires an administrative use permit and alterations that increase nonconformity need a conditional use permit. § 18.68.050; § 18.68.060; § 18.68.070.

Form-Based / Mixed-Use Districts (MU-D, MU-N, MU-F, FBC districts)

Purpose: foster walkable mixed-use corridors with building-form controls; the form-based code (Chapter 18.29) sets building type and frontage rules as well as allowed uses. § 18.29.020–.030.
Typical permitted uses: mixed commercial/residential, civic uses, pedestrian-oriented ground-floor uses; permitted uses are shown in FBC land use tables. § 18.29.070.
Key dimensional standards: FBC supplies specific frontage and building-type standards (front setbacks, building coverage up to 80% in some form-based zones, height ranges up to 55 ft for some types). See 18.29 building-type tables.
Nonconforming interaction: The FBC controls within its mapped area; where the FBC is silent, the rest of the zoning code applies. Nonconforming uses/structures inside the FBC follow Chapter 18.68 rules (continuation, permits for intensification, repair/reconstruction rules). § 18.29.020. C.(3–4); § 18.68.020–.070.

Planned Development / Overlay Zones (PD, Hillside Combining, Downtown Ground Floor Overlay, etc.)

Purpose: overlay and combining districts impose additional/different standards in addition to the base zone. Table 18.04-1 and Part 2 list the overlays. § 18.04.080; Table 18.04-1.
Typical effect: PDs and overlays can preserve older rules or add new requirements; previously-approved PD requirements can continue to apply. § 18.04.080.F.
Nonconforming interaction: When a parcel is subject to a PD or overlay, Chapter 18.68 still governs nonconformities unless the PD explicitly retained different nonconforming rules. Boundary adjustments affecting a nonconforming parcel are restricted: you may not shrink a nonconforming lot’s area, width, or depth. § 18.68.040.D.

Decision‑relevant standards & permit triggers (quick table)

Issue	What the code requires	Code Reference
Proof of legal nonconforming status — who proves it?	Applicant bears the burden; the nonconformity must have been physically established when lawful at that time.	§ 18.68.030
Nonconforming parcel development rights	Legal nonconforming lots may be developed but must meet current setbacks, building coverage, parking except where code allows otherwise; multifamily density reduced 5% for undersized lots.	§ 18.68.040
Cessation of nonconforming land use (land only)	If a nonconforming use of land ceases > 90 days, subsequent use must conform.	§ 18.68.050.B
Discontinuation of nonconforming structure use	If a nonconforming use is discontinued 6 consecutive months or 12 months during any 2-year period, it cannot be reestablished.	§ 18.68.060.E
Enlargement or intensification of nonconforming use	Requires Administrative Use Permit; Director must make admin-UP findings plus § 18.68.080 findings.	§ 18.68.060.D; § 18.68.080
Repairs / modifications to nonconforming structures	Nonstructural repairs: no permit required; structural modifications that do not affect the nonconformity: no permit; structural changes that affect the nonconforming aspect: Design Permit; those that increase it: Conditional Use Permit.	§ 18.68.070 (Table & subsections)
Destruction / reconstruction	If repair/rebuild cost > 50% of market value, structure must comply with current code; residential involuntary-damage exception allows reconstruction with a Design Permit if within 24 months, so long as nonconformities aren’t worsened.	§ 18.68.070.D–E

Checklist — what an applicant must provide or expect

Demonstrate the nonconformity was legally established (historical permits, dated photos, assessor records) per § 18.68.030.
If proposing intensification or enlargement of a nonconforming use, prepare an Administrative Use Permit application addressing the administrative findings and § 18.68.080.
If structural changes will affect the nonconforming aspect (setback wall, increased encroachment), prepare a Design Permit (or Conditional Use Permit if the project increases/exacerbates the nonconformity). § 18.68.070.
If rebuilding after damage, obtain evidence of market value and prepare to show that repair costs do not exceed 50% (or pursue the residential reconstruction pathway with a Design Permit). § 18.68.070.D–E.
For anything that affects parking, signage, or landscaping, cross-check the related chapters (see parking, signage, landscaping and screening). Some nonconforming fences/landscaping must be brought into compliance when projects enlarge by 25% or more. § 18.68.070.G.

Risks & Ambiguities

Issue	Why it matters	What to verify
Proving “legally established” status	City will refuse nonconforming treatment without proof; burden is on the applicant. Legal consequences for proceeding without proof include enforcement.	Collect permits, dated photos, assessor records; confirm with Community Development Director. § 18.68.030.
Which cessation rule applies (90 days vs 6/12 months)	Different sections apply to uses of land versus use of structures; misreading can cause unintended loss of nonconforming right.	Confirm whether the nonconformity is a “use of land” or a “use of structure” before applying the cessation rules. § 18.68.050; § 18.68.060.E.
50% market-value rebuild threshold	The assessor’s valuation and timing drive whether full compliance is required on rebuild — can be costly.	Verify the county assessor value to apply the 50% test; discuss rebuild approach with staff if residential disaster reconstruction is at issue. § 18.68.070.D–E.
Boundary adjustments on nonconforming lots	Shrinking a legal nonconforming lot can remove previously allowed development rights.	Boundary adjustments that decrease area or width are not allowed for nonconforming parcels. § 18.68.040.D.
ADU permitting vs. nonconforming zoning	State ADU law limits the city's ability to require correction of nonconforming zoning conditions for ADU permits. Local nonconforming rules and state ADU provisions may intersect.	Check state ADU law and Morgan Hill ADU chapter; confirm with staff how the city applies ADU rules to nonconforming conditions. (State ADU guidance in uploaded materials.)
Overlap with overlays / PDs	A Planned Development or other overlay may preserve legacy standards or require special findings.	Check whether the parcel is in a PD or overlay (Table 18.04-1) and whether the PD retained prior nonconforming rules. § 18.04.080; Table 18.04-1.

Plain‑English summary

If a building, lot, or use in Morgan Hill predates the current zoning and was lawful when created, the city will generally let it continue — but you must prove it was legally established, you can't expand it without permits, long periods of abandonment can kill the nonconforming right, and major reconstruction often forces compliance with today’s standards. The exact timing cutoffs, permit types (Design Permit, Administrative Use Permit, Conditional Use Permit), and threshold numbers (90 days; 6 months/12 months; 50% market value; 25% triggers for landscaping) are set in Chapter 18.68.

Source References

Morgan Hill Municipal Code — Chapter 18.68, Nonconforming Uses and Structures: § 18.68.010 through § 18.68.080 (purpose, applicability, general rules, nonconforming parcels, land uses, structures, findings).
Morgan Hill Municipal Code — § 18.68.070 (allowed modifications, repair/reconstruction, 50% threshold).
Morgan Hill Municipal Code — § 18.68.040 (nonconforming parcels: development rights, boundary adjustment restriction, multifamily density reduction).
Morgan Hill Municipal Code — Zoning code purpose, applicability, and transitional provisions: § 18.04.040, § 18.04.060, § 18.04.080.
Morgan Hill Municipal Code — Development standards and district tables (commercial and form-based excerpts): Table 18.24-2 and Chapter 18.29 (Form-Based Code) for district/standard context.
State ADU guidance (context on ADUs and nonconforming zoning): uploaded ADU handbook (state law summary) — useful where ADUs intersect with nonconforming conditions.

(For specific text, maps, and legal effect always check the Morgan Hill Municipal Code online and confirm interpretations with Community Development — this page is a synthesis, not a substitute for the code or staff advice.)

Sources

Retrieved passages

Morgan Hill Zoning Code (§ 5) High relevance
Morgan Hill Zoning Code (§ 5) High relevance
Morgan Hill Zoning Code (chapter establishes) High relevance
Morgan Hill Zoning Code (Section 18.108.040) High relevance
California Building Code High relevance
Morgan Hill Zoning Code (§ 5) High relevance
Morgan Hill Zoning Code (§ 5) High relevance
Morgan Hill Zoning Code (Section 18.104.180) High relevance
Morgan Hill Zoning Code (Section 53091) Medium relevance
Morgan Hill Zoning Code (§ 5) Medium relevance
Morgan Hill Zoning Code (§ 66314) Medium relevance
Morgan Hill Zoning Code (§ 5) Medium relevance
Morgan Hill Zoning Code (§ 66333) Medium relevance
CBC § 66321 (§ 66321) Medium relevance
Morgan Hill Zoning Code (§ 5) Medium relevance

Cited sections

Official Morgan Hill code library

Frequently asked questions

What counts as a legally established nonconforming use in Morgan Hill?

A use or structure is legally nonconforming only if it was physically in existence and lawful under the regulations that applied when it was established; unexercised permits or expired approvals do not create legal nonconforming status. The applicant has the burden of proof. § 18.68.030.

Can I expand a nonconforming commercial use on my lot?

Not by right. Any enlargement or intensification of a nonconforming use requires an Administrative Use Permit and the director must make findings including that the nonconforming use was legally established and that it does not produce notable negative impacts. § 18.68.060.D; § 18.68.080.

If my nonconforming house is damaged, can I rebuild it the same way?

If the cost to repair or reconstruct exceeds 50% of the structure’s market value (assessor roll), then the replacement must meet current zoning requirements, except there is a residential reconstruction pathway that allows rebuilding as it existed with a Design Permit under specific involuntary-damage rules and a 24‑month start requirement. § 18.68.070.D–E.

Do nonconforming lots get to ignore setbacks or parking requirements?

No. Legally established nonconforming parcels may be developed but must comply with current setbacks, building coverage, parking, and other standards for the zoning district; only limited exceptions (for density on undersized lots) are spelled out. § 18.68.040.

Does a change in ownership affect a nonconforming use?

No. A change of ownership, tenancy, or management does not eliminate legal nonconforming status — but changing a nonconforming use to a conforming use prevents it from reverting to the prior nonconforming use. § 18.68.060.A–B.

If I stop the nonconforming activity for a while, can I restart it later?

Maybe not. For nonconforming land uses the code says cessation of more than 90 days means the subsequent use must conform to current rules. For nonconforming uses of structures, discontinuation for six consecutive months or 12 months during any two-year period prevents reestablishment. Confirm which rule applies to your situation. § 18.68.050; § 18.68.060.E.

How does the Form‑Based Code (FBC) affect nonconforming buildings in the corridor?

The FBC controls building form and uses within its mapped area; where the FBC is silent the rest of the zoning code applies. Nonconforming structures or uses inside the FBC are governed by Chapter 18.68 for continuation, repair, or enlargement rules. § 18.29.020; § 18.68.020–.070.

Will nonconforming fences and landscaping be allowed to stay during a remodel?

Legally established nonconforming screening, fences, and landscaping may remain, but if the remodel or addition increases floor area or market value by 25% or more, the nonconforming screening/fences/landscaping must be brought into compliance. § 18.68.070.G.

Can the city deny an ADU because my lot or structures are nonconforming?

State ADU law limits local agencies’ ability to deny ADUs because of nonconforming zoning conditions except where the nonconformance creates a health/safety threat affected by ADU construction. Check Chapter 18.84 (ADUs) and state ADU law for the full interplay. (State ADU guidance is in the uploaded ADU handbook.)

What findings will the Community Development Director use to approve an administrative use permit for a nonconforming use?

The director must find (1) evidence the use was legally established; (2) the use has not resulted in notable negative impacts/nuisance; (3) the use is compatible with surrounding character; and (4) the action is consistent with the zoning district’s purpose/intent. § 18.68.080.

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