Before You Build in Moreno Valley, CA: Permit & Rule Checklist (2026)

Moreno Valley exempts fences up to six feet from a building permit, but taller fences and most masonry or block walls need one. Municipal Code Section 8.20.070 amends the state Building Code's permit-exempt-work list to set the local height line, so anything above it goes through the Building Division.

Moreno Valley caps residential fences at three feet in front yards (six feet if built open-style) and six feet along side and rear yards, rising to eight feet where a grade difference between lots requires extra screening. Municipal Code Section 9.08.070 also bars any fence that blocks sight lines at street corners and requires three feet of clearance around fire hydrants.

Moreno Valley caps front-yard retaining walls at three feet and side or rear yard retaining walls at six feet, dropping to three feet where the wall sits on the shared boundary between two residential lots. Municipal Code Section 9.08.070(B) also limits the combined height of a retaining wall plus any fence built on top to eight feet of solid surface.

Moreno Valley follows California Civil Code §841 for shared boundary fences. Adjoining property owners share equal responsibility for maintaining boundary fences. The city does not mediate private disputes.

Moreno Valley requires building, electrical, and plumbing permits for all in-ground and above-ground pools deeper than 18 inches, issued through the Building and Safety Division with CBC and CPC compliance inspections.

Hot tubs and spas in Moreno Valley require building and electrical permits, GFCI protection, equipotential bonding, and either an approved locking safety cover or full barrier compliance under California Health and Safety Code Section 115922.

Moreno Valley allows up to three accessory dwelling units on a single-family lot under Municipal Code Section 9.09.130, approved ministerially by the community development director with no discretionary hearing. Detached ADUs max out at 1,000 square feet with four-foot side and rear setbacks, and applications must be decided within 60 days.

Moreno Valley limits residential accessory structures, sheds, patio covers, garages and gazebos, to 600 square feet within any required yard and 15 feet in height, set back five feet from rear and interior side lines and 10 feet from a street side line. Small sheds of 120 square feet or less can sit closer to the line without a building permit.

Open burning within Moreno Valley's wildland-urban interface area requires a permit from the fire code official under Municipal Code § 8.84.060. The rule applies wherever the city's Fire Hazard Severity Zone maps designate moderate, high, or very high risk, covering most of the city's wildland-adjacent neighborhoods.

Moreno Valley requires anyone with a tree overhanging a street, sidewalk or right-of-way to keep it pruned to at least eight to 10 feet above the surface, and 14 feet over roadway curb lines, under Municipal Code Chapter 14.40. The city may also prune encroaching private trees itself. Severe topping of public trees is banned outright, and violations carry a $1,000 fine.

Moreno Valley's water efficiency ordinance limits landscape irrigation citywide to the hours of 9:00 p.m. to 6:00 a.m. and caps unattended sprinkler stations at 15 minutes of watering per day. Hosing down driveways and washing vehicles with a running hose are also restricted. Municipal Code § 9.17.150 sets these standards, enforced through the city's water purveyors.

Development projects in Moreno Valley that remove an existing tree with a trunk four inches or greater in diameter must replant at a three-to-one ratio using minimum 24-inch box trees of the same species, or a single 36-inch box tree if the city approves a one-to-one substitute. Municipal Code § 9.17.030(E)(8) sets the standard, reviewed as part of landscape plan approval.