Building permits, zoning and land rules in Inyo County, California

Yes. Unincorporated Inyo County requires a building permit for commercial and residential construction, including new construction, mobile-home installation, accessory structures, tiny houses, remodeling, utility setup, grading for new construction, electrical and plumbing work, solar, reroofing and demolition¹. County Title 14 applies to buildings and structures in unincorporated territory and adopts the most recent California Title 24 standards, subject to local amendments and lawful exemptions¹. Permitted work must be inspected when complete or at specified construction stages, and remote locations may take longer to serve¹². A required final inspection and Building Official approval generally come before permanent electric power or liquefied petroleum gas is connected; the ordinance provides limited temporary and early-service routes¹. Inside Bishop, the city issues building permits for most construction; county building rules below apply to unincorporated land³. Residential septic installations remain an Environmental Health responsibility, with jurisdictional exceptions for tribal, state and some federal land^5,6.

Inyo County Public Works - Building & Safety is the permit, plan-review and inspection office for construction in the unincorporated county¹³. The office is at 301 W. Line St. Suite F, Bishop, CA 93514, and its phone number is 760-873-7857¹³. Applicants may email permit applications to buildingandsafety@inyocounty.us¹³. Land-use approval is a separate desk: the Inyo County Planning Department administers zoning, subdivision and environmental review and can be reached at 760-878-0263². Residential septic and well applications go to Environmental Health through its online portal, not to Building & Safety¹⁴.

Inyo County Planning administers zoning for unincorporated land; Bishop sets its own zoning inside city limits^2,4. Residential septic installation approval remains with Inyo County Environmental Health, subject to jurisdictional exceptions^5,6. The zoning map includes named districts and areas identified as unzoned, so check the parcel rather than assuming one countywide standard⁷. An R-1 building site generally requires at least 5,800 square feet and 50 feet of average width, with 25-foot front, 20-foot rear and 5-foot side yards¹⁵. R-1 dwellings are limited to 35 feet and 2.5 stories, while accessory buildings are limited to 20 feet¹⁵. The OS zone generally requires 40 acres and 50-foot yards¹⁶. OS principal buildings are limited to 30 feet or 2.5 stories, with a taller exception for farm and ranch buildings¹⁶. ADUs are permitted in county residential and mixed-use zones, need building permits, and remain subject to applicable dwelling standards; state ADU law prevails over conflicting county zoning rules¹⁷. Ask Planning to confirm the parcel’s district and overlays².

Inyo County Environmental Health administers onsite wastewater rules in unincorporated Inyo County and permits residential septic installations⁵. Submit the sewage-disposal application, plot plan and fee before construction; a new structure using septic must receive its building permit before the septic construction permit is issued⁶. Construction, repair, modification and abandonment of onsite wastewater or greywater systems need approval; qualifying contractor servicing is a limited permit exception⁶. New standard systems require at least 15,000-square-foot lots in existing developments or no more than 2 dwellings per acre in new developments; unsuitable conventional sites need engineered alternatives⁵. Alternatives also require operating permits⁶. Schedule staged construction inspections at least 48 hours ahead¹⁸. Servicing requires inspection and a report within 30 days, or 24 hours if failure is found; alternatives need inspections at least every 3 years or more often as specified by the manufacturer, and supplemental treatment needs annual monitoring⁶. New leaching and percolation systems are prohibited around Aspendell, Mountain View Estates, Rocking K and Bishop, with proposals reviewed by Water Board staff⁶. Only 9.1% of county soils lack severe conventional-drain-field limitations¹⁹.

We could not confirm a general rule allowing ordinary long-term RV occupancy on private land in Inyo County; ask Planning about the parcel and intended use². Inyo County allows a permitted RV as temporary emergency housing after a qualifying disaster makes a primary home uninhabitable, for up to 18 months⁸. County-operated campground stays are limited to 15 days at a campground in any six-week period, with a 30-day permit available to campers age 62 and older; these limits do not establish private-land camping rights²⁰. Tiny homes are allowed by right in unincorporated Inyo County, including as ADUs or JADUs, subject to building, utility and health requirements⁹. Inyo County imposes no minimum residential-unit size in unincorporated areas⁹. ADU utility connections depend on whether the unit is new or within an existing structure²¹. Residentially zoned property in unincorporated Inyo County allows only hosted short-term rentals of 30 days or less, requiring a Planning application and transient-occupancy-tax registration; RVs cannot serve as short-term rental dwellings^22,23.

1. Ask Inyo County Planning to identify the parcel's zoning district, allowed residential use, setbacks, height limits and any subdivision issue^2,7,24.

1. Check flood mapping before design; development in a special flood-hazard area requires a county development permit before work begins²⁵.

1. Confirm wastewater feasibility with Environmental Health: approved onsite treatment or a public-sewer connection is required, and connecting to sewer requires abandonment of the existing onsite system^14,26.

1. Confirm the county permit path for a new well, casing work, abandoned-well destruction or a deep exploratory boring if the site lacks water service¹¹.

1. Submit plans and the building-permit application to Building & Safety by email; for a new structure using septic, obtain the building permit before Environmental Health issues the septic construction permit^6,13.

1. If acting as owner-builder, document who will perform each trade; county permission to do personal trade work does not waive permits or safety codes¹. California’s contractor-license exemption for owners doing their own work requires personal labor or wage-only employees and improvements not intended or offered for sale; separate conditions apply when hiring licensed contractors or improving a principal residence¹⁰.

1. Arrange required staged and final inspections before permanent power or liquefied petroleum gas service^1,12.

Start with legal access, parcel boundaries, zoning and flood exposure. A driveway or comparable work in a state-highway right-of-way requires a Caltrans encroachment permit unless an identified exemption applies; county-road right-of-way work has a minimum application fee of $50 plus calculated fees^27,28. Water deserves equal attention because Inyo County averages about 6 inches of precipitation annually and has experienced severe drought in 44.8% of years¹⁹. County well permits cover new wells, casing repair or modification, abandoned-well destruction and exploratory holes deeper than 25 feet; shallower specified test holes and several other activities are exempt¹¹. Confirm a reliable supply and septic feasibility before closing; only 9.1% of county soils avoid a severe conventional-drain-field rating¹⁹. Federal land makes up about 94.3% of Inyo County, so verify practical access across public land¹⁹.