Lot Coverage Limits: Green Valley vs Tucson
How do lot coverage limits rules compare between Green Valley, AZ and Tucson, AZ?
Green Valley and Tucson have similar restriction levels.
Green Valley, AZ
Pima County
Green Valley is unincorporated Pima County. Lot coverage is set by the Pima County Zoning Code (Title 18, Chapter 18.09 — General Residential and Rural Zoning Provisions). Each residential zone (CR-1, CR-2, CR-3, CR-4, CR-5, GR-1) has a specific maximum lot coverage; CR-1 (the most common Green Valley zone) typically allows around 40-50% lot coverage.
View full Green Valley rules →Tucson, AZ
Pima County
Tucson limits the percentage of a lot that can be covered by buildings and impervious surfaces through the Unified Development Code. Lot coverage maximums vary by zoning district. Typical residential zones (R-1) allow up to 40% building coverage. Impervious surface coverage is also regulated to ensure adequate stormwater retention and comply with the city's water harvesting objectives.
View full Tucson rules →Key Facts Comparison
| Fact | Green Valley | Tucson |
|---|---|---|
| Jurisdiction | Pima County (unincorporated) | - |
| Code Reference | Title 18 Ch. 18.09 | - |
| Typical CR-1 Coverage | 40-50% max | - |
| Variance Body | Pima County Board of Adjustment | - |
| Governing Code | - | Tucson UDC — coverage tables |
| R-1 Building Coverage | - | Up to 40% typical |
| Includes | - | Buildings, driveways, patios, walks |
| Stormwater Link | - | Coverage affects retention requirements |
| Variances | - | Board of Adjustment for exceptions |
Highlighted rows indicate differences between cities.
Green Valley FAQ
What is the maximum lot coverage in Green Valley, AZ?
Green Valley follows Pima County's CR-1 / CR-2 zoning under Title 18 Chapter 18.09, typically allowing 40-50% lot coverage. Check your parcel's exact zone via PimaMaps GIS and consult Pima County Development Services for the precise number.
Do HOAs add lot coverage rules in Green Valley?
Yes. Many Green Valley HOAs (Green Valley Recreation, Quail Creek, etc.) impose CC&R limits stricter than Pima County's. Always check HOA architectural-review rules before building.
Tucson FAQ
How much of my lot can I build on in Tucson?
Lot coverage maximums vary by zone. Typical R-1 residential lots allow up to 40% building coverage. Check the UDC or contact PDSD for your specific zone's maximum. Both building footprint and impervious surface coverage are regulated.
Does a patio count toward lot coverage?
Yes. Impervious surfaces including patios, driveways, and walkways count toward total impervious coverage limits. Covered structures count toward building coverage. Using permeable pavers or materials may reduce your impervious coverage calculation.
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