1. Zoning
  2. Ontario, CA
  3. MDR-25

Ontario, CA · zoning record

MDR-25 zoning in Ontario.

The dimensional standards that govern what you can build in the MDR-25 district, straight from Ontario's ordinance, with every figure quoting its source. Check a specific address to see how these rules apply to a real lot.

Free · Every figure cited · Read from the current code (2026-10-02)

MDR-25 dimensional standards.

These are the letter-of-the-law limits for the base MDR-25 district. Overlays (historic, neighborhood plan, and similar) can tighten them; a specific address check resolves the overlays that actually apply.

Maximum height

35 ft

How tall the building may be.

“4. Maximum Building Height 35 FT”MDR-25 & › Table 6.01-2A · Ontario code · read 2026-10-02

Sources

Every figure above is quoted verbatim from the current ordinance. We never substitute a typical-for-zone default: a field absent from the record shows nothing, not a guess.

Other Ontario districts on record.

Check a real Ontario lot against MDR-25.

See how these standards resolve on a specific parcel, with the overlays that actually apply, in about 20 seconds.

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