Bolthole Index

Santa Clara County, California

Zoning, building permits and septic rules in Morgan Hill, California

Inside Morgan Hill city limits, the City of Morgan Hill Building Division handles building permits and the city's Planning Division handles zoning under Title 18 of the Morgan Hill Municipal Code123. Septic permits come from Santa Clara County Environmental Health, not the city4. Santa Clara County's own zoning applies only to unincorporated land5.

At a glance

Building permit
Handled by the City of Morgan Hill Building Division; applications are emailed as PDFs61
Zoning
City zoning, Title 18 of the municipal code, by district37
Septic
Permit from Santa Clara County Environmental Health48
Rural estate lots
RE-10 requires 10 acres, RE-2.5 requires 2.5 acres, RE-1 requires 1 acre9
Accessory dwelling unit
Allowed in almost all single-family and multi-family zones10
Tiny home or RV living
Not confirmed for city limits; ask the Planning Division2
Owner-builder
State law exempts owner-builders from contractor licensing; city permits still apply11

Who to call

Building permits

City of Morgan Hill Building Division

Building permit applications, plan review and inspections for addresses inside Morgan Hill city limits. Septic and well permits are not issued here.

408-778-6480

[email protected]

17575 Peak Avenue, Morgan Hill, CA 95037

Planning & zoning

City of Morgan Hill Planning Division

Zoning and land use questions, planning permits and tree removal permits inside Morgan Hill city limits.

408-778-6480

[email protected]

17575 Peak Avenue, Morgan Hill, CA 95037

Septic permits

Santa Clara County Department of Environmental Health

Septic (onsite wastewater) permits and inspections, and well permits, in Santa Clara County.

(408) 918-3400

1555 Berger Drive, Building #2, Suite 300, San Jose, CA 95112

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Morgan Hill means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Morgan Hill, CA?

Building work inside Morgan Hill goes through the City of Morgan Hill Building Division, which accepts building permit applications and plans by email as PDFs only.61

The city's page did not state a universal residential building-permit requirement, but permit applications must comply with the 2025 California Building Standards Codes as adopted and amended by the Morgan Hill Municipal Code.12 Ask the Building Division whether a particular project needs a permit.

Limited online permitting exists only for residential contractor applications for reroofs, repipes, SolarApp+-approved solar permits and water heaters.6

California law exempts an owner who builds or improves a structure on their own property from contractor licensing, with limitations, which does not remove the permit step.11

Who issues building permits in Morgan Hill, and how do you reach them?

The City of Morgan Hill Building Division issues building permits for city addresses; email [email protected] or call 408-778-6480.1 The office is at 17575 Peak Avenue.1

Inspection requests are scheduled through the city's eTRAKiT system.13

The Santa Clara County Department of Planning and Development issues building permits only for unincorporated land, so a Morgan Hill address does not start there.14

Does Morgan Hill have zoning, and what does it mean for lot size and setbacks?

Yes, the Morgan Hill Municipal Code contains Title 18, Zoning, with residential zoning districts and development-standard tables.37

In the Residential Estate districts, the minimum lot area is 10 acres in RE-10, 2.5 acres in RE-2.5 and 1 acre in RE-1.9 Maximum building coverage is 15 percent, 25 percent and 30 percent in those three subzones respectively.15

Maximum height in the listed Residential Estate subzones is 30 feet.16

We could not confirm setbacks or a minimum home size, so call the Planning Division at 408-778-6480 ext. 2 for the parcel's district.2

How do septic permits work in Morgan Hill?

A permit must be obtained from the Santa Clara County Department of Environmental Health to construct, reconstruct or repair an individual on-site sewage disposal system.4 The applicant must contact Environmental Health to schedule the required inspections.17

Sewage treatment on-site may be considered where a sanitary sewer is not available.18 A property with available sanitary sewer must be connected to it.19 Cesspools are not authorized in the county.20

Whether a private well inside Morgan Hill needs a permit was not confirmed; county rules require a permit to dig, bore or drill a water well in the valley water district.21 Call Environmental Health at (408) 918-3400.8

Can you live in an RV, tiny home or ADU in Morgan Hill?

ADUs and junior ADUs are allowed in any single-family or multi-family zone in Morgan Hill, with limited exceptions, and Chapter 18.84 plus property-specific review applies.10

We could not confirm a city rule on tiny-home occupancy or long-term RV living on a city lot, so ask the Planning Division.2 Inside Morgan Hill mobile home parks, tent camping is prohibited.22

Santa Clara County's own bans and allowances for RVs and tiny homes apply to unincorporated land, not to city lots.23

Building a home in Morgan Hill: the steps, in order

  1. Call the Planning Division at 408-778-6480 ext. 2 to confirm the zoning district and its standards.27
  2. Ask whether the lot has sewer; if not, contact Santa Clara County Environmental Health about a septic system.198
  3. Email the building permit application and plans as PDFs to [email protected].6
  4. Build to the 2025 California Building Standards Codes as amended by the city.12
  5. Schedule inspections through eTRAKiT.13

What stays with Santa Clara County, and what to check before you buy

Santa Clara County handles septic permits and well rules, not the city.421

The county's planning and building rules apply to unincorporated land only, and city parcels have their own zoning.14

County context: the effective property tax rate is 0.7 percent and the typical home value is about 1,624,356 dollars.2425

Watch-outs

  • The Santa Clara County permit center serves unincorporated land only; a Morgan Hill address starts with the city.14
  • Setbacks, minimum home size, tiny-home occupancy, long-term RV living and private-well rules inside city limits are not confirmed; ask the Planning and Building Divisions.21
  • The city accepts only PDF submittals by email for most building permits.6

Sources

  1. City of Morgan Hill Building Division (morganhill.ca.gov)
  2. City of Morgan Hill Planning Division (morganhill.ca.gov)
  3. Chapter 18.16 - Residential Detached Zoning Districts; 18.16.030 - Development standards (Morgan Hill), quoted and re-checked
  4. Other approvals that may be needed for construction, quoted and re-checked
  5. Planning Services, quoted and re-checked
  6. Building & Fire Prevention (Morgan Hill), quoted and re-checked
  7. Chapter 18.16 - Residential Detached Zoning Districts; 18.16.030 - Development standards (Morgan Hill), quoted and re-checked
  8. Santa Clara County Department of Environmental Health (deh.santaclaracounty.gov)
  9. Chapter 18.16 - Residential Detached Zoning Districts; 18.16.030 - Development standards (Morgan Hill), quoted and re-checked
  10. Accessory Dwelling Units (Morgan Hill), quoted and re-checked
  11. California Business and Professions Code Section 7044, quoted and re-checked
  12. Building & Fire Prevention (Morgan Hill), quoted and re-checked
  13. Building & Fire Prevention (Morgan Hill), quoted and re-checked
  14. Planning Services, quoted and re-checked
  15. Chapter 18.16 - Residential Detached Zoning Districts; 18.16.030 - Development standards (Morgan Hill), quoted and re-checked
  16. Chapter 18.16 - Residential Detached Zoning Districts; 18.16.030 - Development standards (Morgan Hill), quoted and re-checked
  17. Application for septic/OWTS clearance for new development, quoted and re-checked
  18. Onsite Wastewater Treatment System (OWTS), quoted and re-checked
  19. Santa Clara County OWTS Ordinance, quoted and re-checked
  20. Santa Clara County OWTS Ordinance No. NS-517.85, quoted and re-checked
  21. Well Permits and Inspections, quoted and re-checked
  22. 8.08.370 - Tent camping prohibited (Morgan Hill), quoted and re-checked
  23. plandev.santaclaracounty.gov, quoted and re-checked
  24. Effective property tax rate: Bolthole Index county data
  25. Typical home value (Zillow): Bolthole Index county data

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Morgan Hill

Morgan Hill’s own rules

  • Building code adoptedAdopted (with conditions)

    Building permit applications inside Morgan Hill city limits.

    • As of January 1, 2026, applications must comply with the 2025 California Building Standards Codes as adopted and amended by the Morgan Hill Municipal Code.
    “As of January 1, 2026, all permit applications must comply with the 2025 California Building Standards Codes as adopted and amended by the Morgan Hill Municipal Code.”
  • InspectionsLimited

    Permitted construction inside Morgan Hill city limits.

    • Inspection requests are scheduled through the city's eTRAKiT system.
    • The opened page does not state that every construction category requires inspection.
    “For detailed instructions on scheduling an inspection through the eTRAKiT system, download the user brochure (PDF).”
  • Certificate of occupancyLimited

    Business spaces inside Morgan Hill city limits.

    • The Building Division determines whether a certificate is required before opening.
    • If required, the applicant must submit a permit application, statement of operations, and floor plan.
    “As part of the Business License review process, the Building Division will check to see if a Certificate of Occupancy is required for your space prior to opening for business.”
  • Local zoningPresent

    Land inside Morgan Hill city limits; the Morgan Hill Municipal Code contains Title 18, Zoning, including residential zoning districts and development standards.

    “Table 18.16-2: Residential Estate (RE) District Development Standards”
  • Zoning districtsPublished

    Morgan Hill city zoning districts, including residential detached districts and their subzones.

    • District-specific standards vary by zoning district and subzone.
    “Tables 18.16-2, 18.16-3, and 18.16-4 identify development standards in the residential detached zoning districts.”
  • Camping on your landLimited

    Tent camping inside Morgan Hill mobile-home parks.

    • The prohibition is limited to mobile home parks; the source does not establish a citywide prohibition on all temporary camping.
    “Camping in tents is prohibited in all mobile home parks.”
  • Accessory dwellingsAllowed (with conditions)

    ADUs and JADUs on residential property inside Morgan Hill city limits.

    • ADUs are subject to Chapter 18.84 and property-specific planning and building review.
    • Special zones may require an additional application or significantly limit what may be built.
    • Multifamily properties may have up to eight detached ADUs or up to 25 percent of the number of units, depending on the property.
    “In almost all cases, yes! ADUs and JADUs are allowed in any single-family or multi-family zone. If residential buildings are allowed, ADUs are almost always allowed too (with limited exceptions).”
  • Permit processPublished (with conditions)

    Building permit applications inside Morgan Hill city limits.

    • Only PDF submittals are accepted on the city building page.
    • Limited online permitting is available only for residential contractor applications for reroofs, repipes, SolarApp+-approved solar permits, and water heaters.
    • All other permits should be submitted by email.
    “The City of Morgan Hill accepts Building Permit Applications (PDF) and Fire Permit Applications (PDF) and plans via email at [email protected]. PLEASE NOTE: Only PDF submittals will be accepted.”

Rules another office applies inside Morgan Hill

Morgan Hill does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Minimum lot sizeDistrict specific (with conditions)

    Residential Estate districts RE-10, RE-2.5, and RE-1 inside Morgan Hill city limits.

    • The applicable minimum depends on the residential estate subzone.

    RE-10 minimum lot area: 10 acres · RE-2.5 minimum lot area: 2.5 acres · RE-1 minimum lot area: 1 acre

    “Lot Area, Minimum 10 acres 2.5 acres 1 acre”
  • Lot coverageDistrict specific (with conditions)

    Residential Estate districts RE-10, RE-2.5, and RE-1 inside Morgan Hill city limits.

    • Maximum building coverage varies by subzone.

    RE-10 maximum building coverage: 15 percent · RE-2.5 maximum building coverage: 25 percent · RE-1 maximum building coverage: 30 percent

    “Building Coverage, Maximum 15% 25% 30% Structure Requirements”
  • Building heightDistrict specific (with conditions)

    Residential Estate districts RE-10, RE-2.5, and RE-1 inside Morgan Hill city limits.

    • Maximum height is 30 feet for the listed Residential Estate subzones.

    maximum building height: 30 feet

    “Height, Maximum 30 ft. 18.56.020 Table 18.16-3: Residential Detached Low and Medium Density District Development Standards”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Morgan Hill or Santa Clara County directly.

  • Building permit — Residential construction inside Morgan Hill city limits.
  • Owner-builder exemption — Owner-builders performing construction inside Morgan Hill city limits.
  • Minimum dwelling size — Primary dwellings inside Morgan Hill residential zoning districts.
  • Tiny homes — Tiny-home occupancy inside Morgan Hill city limits.
  • Septic inspection — Septic/OWTS systems inside Morgan Hill city limits.
4 more unanswered
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption
  • Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Morgan Hill publishes no rule on the point, not that none exists. Santa Clara County’s page lists the county offices to call.

← All of Santa Clara County: county rules, score and offices