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Site Risk Report

1245 S Alma School Rd, Mesa, AZ 85210

Generated March 11, 202633.3921, -111.8572

29
Moderate

Moderate Risk Site

Minor soil adjustments needed — budget 3-8% above standard for site prep.

C
43
Construction
Soil & Foundation
Moderate
O
15
Occupancy
Zoning & ADU
Low
P
55
Protection
Fire Services
Elevated
E
7
Exposure
Flood/Fire/Seismic
Low
ADU Eligible Site

Prefab Gap Coverage Available

This site scores 43/100 for soil risk and 7/100 for exposure. Protect your margin with installation gap coverage — covers the window between delivery and certificate of occupancy when standard builders risk doesn’t apply.

Detailed Analysis

O
Occupancy — Zoning & ADU

ADU Eligible

Mesa allows one ADU per single-family lot. Max 1,000 sq ft or 50% of primary dwelling. Mesa has been proactive in implementing HB 2720 requirements.

Jurisdiction
Mesa
Max ADUs
1
Max ADU Size
1,000 sq ft
Legislation
HB 2720 (2024)
Owner Occupancy
Not Required

What This Means for Your Build

  • This site is ADU eligible — up to 1 unit, max 1,000 sq ft each
  • Budget $2,000-5,000 for permits and plan review in Mesa
  • Timeline: plan review typically 4-8 weeks in Mesa

Permit Checklist — Mesa

!
Site planRequired

Show ADU placement, setbacks

!
Building permit applicationRequired

Submit to Mesa Planning Division

!
Construction plansRequired

Structural, MEP

!
Utility planRequired
!
Energy code complianceRequired

Must meet current energy code

Parcel Information

APN
134-23-005C
Lot Size
5.83 acres (253,893 sq ft)
Zoning
1524
OFFICE BUILDING 4 STY W/ PRKING NOT SEP
Jurisdiction
MESA
County
Maricopa
Year Built
1986

C
Construction — Soil Analysis

43/100

Laveen loam, 0 to 1 percent slopes. Moderate caliche — budget for potential excavation challenges.

Soil Type
Laveen
Caliche
Moderate
Shrink-Swell
Low
Excavation
Moderate
Foundation Risk
Moderate
Drainage
Well drained
Steel Corrosion
Moderate
Concrete Corrosion
Moderate
Depth to Bedrock
36 inches

Cost Impact: 3-8% above standard

What This Means for Your Build

  • Budget 8-15% extra for foundation reinforcement — thickened slab edges or pier supports
  • Corrosive soil — use epoxy-coated rebar and corrosion-resistant fasteners

E
Exposure — Flood Zone

Zone X

Minimal flood hazard area — outside the 500-year floodplain

Risk Level
Minimal
Insurance Required
No

Insurance Estimate: Not required — optional coverage ~$400-600/yr

What This Means for Your Build

  • Minimal flood risk — no additional flood-related budget needed
  • Standard drainage and grading practices are sufficient
  • Flood insurance is optional but recommended for any property

Exposure — Wildfire Risk

Very Low

No wildfire risk to structures at this location. The site is in a developed area where wildfire risk to buildings is negligible.

Risk Index
0.000

Defensible Space

Standard landscaping practices sufficient for this risk level.

Exposure — Seismic Hazard

Low

Low seismic risk (PGA 0.080g). Standard residential construction with basic seismic provisions per IRC/IBC. No significant cost impact expected.

Peak Ground Acceleration
0.080g
Seismic Design Category
B
Hazard Level
Low

What This Means for Your Build

  • Low seismic risk — standard construction practices are sufficient
  • No special seismic upgrades needed beyond code minimums

Protection — Fire Services

PC 7

Limited fire protection (estimated PC 7). Insurance rates may be higher due to distance from fire services. Consider fire-resistant construction materials.

Nearest Fire Station
0.5 miles
Station Name
Mesa Fire Station 204
Hydrant Nearby
No

Next Steps

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Disclaimer: This report uses publicly available data from government sources (Census, USDA, FEMA, USFS, USGS) and is intended as a preliminary site assessment tool. It does not replace a professional geotechnical investigation, Phase I environmental assessment, or formal survey. Risk scores are estimates based on available data. Consult licensed professionals before making construction or investment decisions. Data accuracy depends on source agency update schedules.