Moreno Valley, CA Environmental Rules: Defensible Space (2026)
Key Facts
- Total clearance required
- 100 feet from structure, three zones
- Zone 0 extent
- First 5 feet, most combustibles banned
- Zone 1 extent
- 5-30 ft (5-50 ft on slopes over 20%)
- Solar array clearance
- 10-30 ft depending on array size
- Governing chapter
- MVMC §§ 8.84.230-8.84.360, Ord. 1033
Summary
Moreno Valley requires a 100-foot defensible space around buildings in its wildland-urban interface area, broken into three graduated zones (0, 1, and 2) under Municipal Code § 8.84.260. Zone 0, the five feet closest to a structure, bans nearly all combustible material outright.
604.8 Defensible Space clearance zones and requirements. The required 100-foot Defensible Space clearance is identified in three (3) distinct zones: Zone 0, 1, and 2. ... 604.8.1 Requirements. Defensible Space shall be in accordance with the requirements of Appendix A of this code, Riverside County Fire Department Guidelines and the specific requirements for each zone listed in Sections 604.8.2 through 604.8.5. ... Zone 0 is the horizontal area within the first five (5) feet around the structure, including stairs, balconies, attached or adjacent decks, and outbuildings. ... Zone 1 is the area within 5-30 feet of structures and decks, with slopes not greater than 20 percent; 5-50 feet from buildings and decks, when slopes are greater than 20 percent. ... Zone 2 is the area from the outer edge of Zone 1 to 100 feet from structures and decks.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4887234; v10 updated 2026-04-07).
Full Breakdown
4 to the California Wildland-Urban Interface Code, adopted by Ordinance 1033 on November 4, 2025. 230 requires anyone owning, leasing, or controlling a building in a Fire Hazard Severity Zone to maintain an effective firebreak by clearing combustible material for 100 feet from the structure, a distance the fire code official can increase based on a site-specific fire protection plan. 350: Zone 0 covers the first five feet around the structure, including roofs, decks, and stair landings; Zone 1 runs 5 to 30 feet on slopes of 20 percent or less (5 to 50 feet on steeper slopes); and Zone 2 extends from the outer edge of Zone 1 out to the full 100 feet.
300 bans landscaped roofs, artificial turf, combustible mulch, firewood, and vines or climbing plants on structures within it, and requires all fencing and gates in that zone to be non-combustible. 320 imposes a transition standard instead, banning new trees and combustible mulch while requiring at least three feet of vertical clearance between vegetation and roofs. 250: a minimum 10-foot clearance for arrays under 1,500 square feet and 30 feet for larger arrays, with clusters kept at least 20 feet apart. 270.
Violations & Fines
Failing to maintain the required defensible space clearance is a violation of the Wildland-Urban Interface Code under § 8.84.090, subject to the penalty scheme in Health and Safety Code §§ 17995-17995.5 and Government Code § 51185. Improved parcels that accumulate combustible brush or vegetation can also be declared a public nuisance under § 8.84.210 and ordered cleared entirely, with the Riverside County Fire Department authorized to recover its inspection and enforcement costs under § 8.84.080.
Frequently Asked Questions
How much defensible space does Moreno Valley require around a home?
What can't I have in the 5 feet closest to my house?
Do older homes get more time to comply with Zone 0 rules?
How close can solar panels sit to my house under this code?
Sources & Official References
Other rules in Moreno Valley
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How other cities in Riverside County handle defensible space.