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Johnson County, IA — Solar Development Risk Assessment

Local solar ordinance barriers, board sentiment, and utility policies that affect development timelines and risk.

32.3
Risk Grade
Excellent
E Iowa; Iowa City (University of Iowa); progressive university city; active solar; local CUP
Assessment Snapshot
Population
154,996
State Rank
#1
Compliance
48%
Trajectory
42

Moratorium Status

✓ No Active Moratorium
No Moratorium

Ordinance & Regulations

Setback Requirements
None codified. No confirmed county-specific solar ordinance.
Zoning Mechanism
Johnson County Planning & Zoning: CUP/SUP in Agricultural district.
Acreage Caps
None codified.
Density Caps
None codified.
Spacing Rules
None codified.
Size Restrictions
None codified.

Board Sentiment & Political Risk

Sentiment Analysis
Very favorable — University of Iowa progressive; active solar market
Basis for Assessment
E Iowa; Iowa City (University of Iowa); progressive university city; active solar; local CUP
Political Risk Factors
Improving
Board Members
Lisa Green-Douglass | D | Supervisor | V Fixmer-Oraiz | D | Supervisor | Rod Sullivan | D | Supervisor | Jon Green | D | Supervisor | Board of Supervisors | 5 members | Iowa City, Iowa | 4-yr staggered terms | Partisan elections | Predominantly Democratic | University of Iowa area

Grid, Utilities & State Context

Grid Operator
MISO / Alliant Energy (ALTW) zone
Utilities
Alliant Energy (ALTW), MidAmerican Energy
State Permitting Process
Iowa Utilities Board (IUB) generating certificate required for projects ≥25 MW (Iowa Code §478). Projects <25 MW: local CUP/SUP under county/township zoning governs. No statewide preemption of local ordinances — Iowa is a strong local-control state. County boards have full authority to restrict or deny solar below 25 MW threshold. Active local opposition movement in many agricultural counties; several moratoriums and restrictive ordinances enacted 2021–2024. IUB certificate does not override local zoning for sub-25 MW projects. MISO interconnection territory statewide.
State Incentives
Iowa Renewable Energy Standard: minimal (105 MW aggregate mandate met since late 1990s). Net metering: IUC-regulated utilities (MidAmerican Energy, Alliant IPL) offer net metering under Iowa Code §476A; programs vary by cooperative. Property tax exemption: 5-year exemption for solar equipment added via IA Code §427B.26. MidAmerican Energy planning 800 MW new solar at ~6 IA sites by 2028 (filed IUC Feb 17 2025). Utility: MidAmerican Energy serves Des Moines metro, western/central IA; Alliant Energy/IPL serves eastern/southern IA; rural areas served by 60+ electric cooperatives.

Development Activity

Active/Completed Projects
MidAmerican Energy Oakcrest Hill | 3 MW | near Hills, Johnson County | operational 2021 Farmers Electric Cooperative | 2.5 MW total | Frytown, Johnson County | operational 2014 + expanded 2016 + 2024 PCR near Lone Tree | 7.5 MW | Johnson County | approved Dec 21 2023 (CUP) | operational 2024 Solar Triangle (proposed) | 100-150 MW | SW of Iowa City, Johnson County | MidAmerican Energy | IUC docket RPU-2025-0001 filed Feb 2025 | construction planned 2027; operational target 2028 (The Gazette Feb 19 2025)
Denied/Withdrawn Projects
No confirmed IUC denials for Johnson County. Some local opposition to Solar Triangle scale.

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Last verified: 2026-04-01 | SolarRisk Tracker | Data sources: Government records, utility filings, public meeting minutes