Monrovia Zoning Intelligence
Zoning, permitted uses, ADU rules, and development potential for Monrovia, California. 59 districts analyzed.
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How is Monrovia zoned?
Permitted uses vary by district. Search a Monrovia parcel on the map above to see exactly what you can build there.
- Total zoning districts59
- Residential districts4
- Commercial districts5
- Industrial districts2
Statewide law - applies to all California cities, not specific to Monrovia.
- California state ADU lawApplies statewide
- SB-9 lot split eligibilityPer parcel review
- SB-79 (transit-oriented housing)Near transit, from Jul 2026
- Density Bonus Law (state)Eligible projects
- Local impact / permittingVerify with Monrovia planning
What should developers know about Monrovia zoning?
Monrovia is a foothill community in the San Gabriel Valley where the Angeles National Forest (ANF, ~3,579 acres) and the Hillside Wilderness Preserve (HWP, ~1,216 acres) together comprise the largest land categories in the city. That footprint of natural open space shapes every development conversation: the buildable, urban portion of Monrovia is far smaller than the total city boundary suggests. Among developable districts, Planned Development (PD) designations dominate, with over 20 individually numbered PD zones ranging from under an acre to nearly 74 acres (PD-12 at 73.82 acres being the largest), which means that most significant residential development since mid-century has come through site-specific PD approvals rather than standard zoning.
The commercial layer is relatively compact. Historic Downtown Commercial (HCD, ~10 acres) anchors the Old Town Monrovia corridor, while Commercial Regional Subregional (CRS, ~57 acres) addresses larger retail and service uses. Manufacturing (M, ~132 acres) and Office Research And Development Light Manufacturing (O/RD/LM, ~50 acres) support employment uses south of the downtown. For residential investors, the hillside-adjacent low-density zones (1-DU-2.5 through 1-DU-10) signal estate-scale lots with significant site constraints. Building controls here cover FAR, lot area, density, coverage, perviousness, setbacks, and height - a full suite that reflects both hillside sensitivity and historic neighborhood character.
This is pre-development intelligence, not legal advice - verify with the local planning department before acquisition.
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Try ArchiWise free →Monrovia, California Zoning Districts: What Do They Mean?
Zoning districts are areas regulated by specific laws that determine land use, building types, and development rules. Each district below shows its zone type and which uses it permits.
| Zone Code | Zone Type | Permitted Uses | Area |
|---|---|---|---|
1-DU-10 1 Dwelling Unit 10 Acres | - | - | 10.1 ac |
1-DU-2.5 1 Dwelling Unit 2.5 Acres | - | - | 19.9 ac |
1-DU-3 1 Dwelling Unit 3 Acres | - | - | 3.6 ac |
1-DU-5 1 Dwelling Unit 5 Acres | - | - | 61.3 ac |
What are the building controls in Monrovia?
Setback, height, FAR, lot area, and density controls enforced across Monrovia zoning districts.
- Far control
- Lot control
- Multi control
- Density control
- Coverage control
- Pervious control
- Lot width control
- Rear setback control
- Side setback control
- Front setback control
- Building height control
Cities near Monrovia
Monrovia zoning: frequently asked questions
What makes Monrovia's Planned Development zones significant for builders?
With more than 20 numbered PD districts, Planned Development is the dominant mechanism for residential project delivery in Monrovia. Each PD is individually entitled, meaning standards - density, setbacks, product type - vary by district rather than following a single base zone. PD-12 is the largest at roughly 74 acres, while several PDs are under 5 acres and represent infill-scale parcels. Buyers of PD-zoned land should verify the specific approved plans and any remaining entitlement capacity.
How do the hillside and open space districts constrain development in Monrovia?
The Angeles National Forest (ANF) and Hillside Wilderness Preserve (HWP) together account for nearly 4,800 acres, most of which is off-limits to private development. The Hillside Recreation (HR, ~342 acres) district exists as a limited transition zone. Properties adjacent to or within hillside classifications face constraints tied to slope, grading, fire hazard, and perviousness - all of which are tracked through the city's building control categories.
What commercial options exist near Monrovia's downtown?
Historic Downtown Commercial (HCD) covers roughly 10 acres along the Old Town corridor and is oriented toward pedestrian-scale retail, dining, and mixed-use. Commercial Regional Subregional (CRS, ~57 acres) accommodates larger-format retail and service commercial. Neighborhood Commercial (NC, ~34 acres) serves local retail needs at the neighborhood scale. Business Enterprise (BE, ~19 acres) allows for a blend of office and commercial uses.
Are ADUs permitted in the single-family and low-density residential zones?
Yes - California state ADU law applies citywide, including in the large-lot residential zones (1-DU-2.5, 1-DU-5, 1-DU-10) and the various PD districts with residential classifications. On hillside-adjacent parcels, objective design standards tied to grading, coverage, and perviousness will constrain ADU siting. Monrovia's building controls include coverage and pervious-surface categories that factor into ADU feasibility review.
What industrial and R&D employment uses are present in Monrovia?
Manufacturing (M, ~132 acres) provides the heaviest industrial capacity, while Office Research And Development Light Manufacturing (O/RD/LM, ~50 acres) targets tech-adjacent or light-industrial tenants. Both districts sit south of the downtown and freeway-accessible, consistent with the San Gabriel Valley's industrial corridor pattern. The O/RD/LM classification is particularly relevant for biotech or advanced manufacturing tenants seeking more flexible space than standard M zoning.
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Zoning data is pre-development intelligence, not legal advice. Verify with the Monrovia planning department before acquisition or design.