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🏞️ Michigan⚠️ 2021 MRC Court-Blocked — 2015 MRC in Effect

Michigan
Solar Permit Plans.
NEC 2023. 2015 MRC
Residential. Court-Blocked 2021.

Michigan enforces NEC 2023 (Part 8, effective March 12, 2024) for electrical work statewide. But residential structural code is frozen: a July 7, 2025 Court of Claims order blocks LARA from applying the 2021 Michigan Residential Code for 1-2 family dwellings — the 2015 MRC remains the enforced standard while litigation continues. Three different code editions now govern Michigan solar projects depending on discipline and building type. We get every plan set right.

NEC 2023 — Michigan Part 8 2015 MRC Residential Structural 2021 IBC Commercial DTE Energy · Consumers Energy C-46 + Electrical Contractor LARA
Order Michigan Plan Set →Three-Code Guide ↓
NEC 2023Michigan Part 8 — effective Mar 12, 2024
2015 MRCResidential structural — court order Jul 7, 2025
2021 IBCCommercial — effective Apr 9, 2025
10% CapNet metering cap — raised from 1% (PA 235)
NEC 2023Michigan Part 8 — Mar 12, 2024
2015 MRCResidential — 2021 MRC court-blocked
2021 IBCCommercial — Apr 9, 2025
10% CapNet metering — DTE + Consumers
C-46LARA Solar Contractor licence
Michigan Solar Permits — 2026

Three Codes, One State — Michigan's 2026 Code Situation Explained

Permit Design produces Michigan solar permit plan sets for solar installers, EPCs, and roofing companies across every Michigan county. Michigan entered 2026 with an unusual three-way code split that affects every residential solar project. Electrical work follows NEC 2023, adopted as Michigan's Part 8 Electrical Code rules effective March 12, 2024. Commercial and multi-family structural work follows the 2021 IBC, effective April 9, 2025. But residential structural work for 1-2 family dwellings — where the vast majority of solar installations occur — is frozen at the 2015 Michigan Residential Code (MRC) following a Michigan Court of Claims order issued July 7, 2025 that temporarily blocks LARA from implementing the updated 2021 MRC while litigation continues.

For solar installers, this means: your single-line diagram and electrical schematic reference NEC 2023, but your roof structural calculations for a residential 1-2 family home reference the 2015 MRC — not the 2021 edition many template plan sets default to. Using 2021 MRC structural references on a Michigan residential plan set creates a code citation mismatch with the currently enforced 2015 standard for 1-2 family dwellings. Commercial and multi-family solar projects use 2021 IBC structural provisions, which are unaffected by the residential court order.

Michigan's two dominant utilities — DTE Energy (Metro Detroit, Southeast Michigan) and Consumers Energy (West and Central Michigan) — both follow MPSC interconnection rules under PA 295 of 2008 and PA 342 of 2016. Systems under 20 kW qualify for simplified interconnection. Michigan's net metering cap was raised from 1% to 10% of utility peak load under PA 235 of 2023, securing program availability. Every Permit Design Michigan plan set is built to NEC 2023 electrical, 2015 MRC residential structural (or 2021 IBC commercial), with the correct utility interconnection package.

Last updated: May 2026 · Reading time: ~8 minutes · NEC 2023, 2015 MRC court order (July 7, 2025), and 2021 IBC commercial code confirmed as of May 2026.

Michigan's Three-Code Split — 2026

NEC 2023 + 2015 MRC + 2021 IBC — All Active Simultaneously

No other state we cover has three different code editions active at once across electrical, residential structural, and commercial structural disciplines. Here is the accurate breakdown for every Michigan solar project in 2026.

Court Order — July 7, 2025
2021 Michigan Residential Code Temporarily Blocked — 2015 MRC Remains in Effect
A Michigan Court of Claims order issued July 7, 2025 temporarily blocks LARA from implementing the updated 2021 Michigan Residential Code (MRC) for one and two-family dwellings while litigation continues. The 2015 MRC remains valid and currently enforced for residential structural provisions statewide. This directly affects solar: roof attachment, rafter sizing, dead load, and snow load calculations for residential 1-2 family solar installations must reference the 2015 MRC — not the 2021 edition. Commercial and multi-family construction is unaffected by this court order and follows the 2021 IBC (effective April 9, 2025). Every Permit Design Michigan residential plan set references 2015 MRC structural provisions to align with what is currently enforced.
Electrical Code
NEC 2023 — Part 8
✓ Filed Nov 13, 2023 — effective Mar 12, 2024
✓ NEC 2023 second printing with MI amendments
✓ Article 690 — Solar PV Systems
✓ §690.12 Rapid Shutdown mandatory
✓ Applies to ALL Michigan solar — residential + commercial
Residential Structural — 1-2 Family
2015 MRC (current)
⚠ 2021 MRC blocked by Court of Claims — Jul 7, 2025
⚠ 2015 MRC remains valid + enforced for 1-2 family
⚠ Litigation ongoing — status as of May 2026
⚠ Roof attachment, dead/snow load: use 2015 MRC
✓ Most residential solar plan sets — this applies
Commercial / Multi-Family Structural
2021 IBC
✓ Effective April 9, 2025
✓ Unaffected by residential court order
✓ Commercial + multi-family solar structural
✓ 2021 IBC Chapter 16 load provisions
✓ Ground-mount commercial systems
What this means for your residential Michigan plan sets. If a structural template defaults to "2021 Michigan Residential Code" — common from firms that update templates whenever a new edition is announced regardless of enforcement status — the plan set cites a code that is currently blocked by court order for 1-2 family dwellings. Building departments reviewing against the actually-enforced 2015 MRC will flag the mismatch. Every Permit Design Michigan residential plan set cites 2015 MRC for structural provisions and NEC 2023 for electrical — the combination actually enforced as of May 2026.
Michigan Utilities

DTE Energy vs Consumers Energy — Michigan's Two Dominant Utilities

Michigan's electric utility landscape is dominated by two investor-owned utilities regulated by the MPSC, with municipal utilities and a UP-specific utility covering the remainder.

DTE Energy
Metro Detroit · Southeast Michigan
TerritoryDetroit, Ann Arbor, Flint, Port Huron, SE + E-Central MI
Net meteringFull retail rate — PA 235 of 2023
Simplified thresholdSystems under 20 kW
Rates 2026~17-20¢/kWh — rising
ISA timeline4–8 weeks residential
Consumers Energy
West + Central Michigan · Lower Peninsula
TerritoryGrand Rapids, Lansing, Kalamazoo, Traverse City, Saginaw
Net meteringFull retail rate — PA 235 of 2023
Simplified thresholdSystems under 20 kW
Rates 2026~17-20¢/kWh — rising
ISA timeline4–8 weeks residential
UPPCO + Municipal Utilities
Upper Peninsula · LBWL · Holland BPW
UPPCO territoryPortions of Upper Peninsula
LBWLLansing — $500/kW rebate up to $2,000
Holland BPWHolland municipal utility
MPSC oversightPA 295/PA 342 applies to all
ISA timelines2–6 weeks municipal utilities
Michigan's 10% net metering cap expansion secures long-term availability. PA 235 of 2023 raised Michigan's statewide net metering programme cap from 1% to 10% of utility peak load — a tenfold expansion. DTE Energy and Consumers Energy customers receive full retail-rate credits for excess solar generation. With electricity rates reaching 17-20¢/kWh in 2026, the value of each exported kWh has never been higher in Michigan, making the 10% cap expansion especially significant for long-term solar economics.
Michigan Snow Loads

Michigan Snow Load Zones — Among the Highest Outside the Rockies

Michigan's Great Lakes lake-effect snow creates some of the highest residential snow load requirements in the continental US outside Rocky Mountain states. Every Michigan plan set includes county-specific snow load engineering.

RegionSnow Load (psf)Key Counties / CitiesNotes
Upper Peninsula — Lake Superior Snowbelt60–80 psfKeweenaw, Houghton, Ontonagon, MarquetteHighest snow loads in Michigan — extreme lake-effect from Lake Superior
West Michigan — Lake Michigan Snowbelt30–50 psfMuskegon, Grand Traverse (Traverse City), Emmet (Petoskey)Significant lake-effect from Lake Michigan prevailing westerly winds
Northern Lower Peninsula30–40 psfOtsego, Roscommon, Crawford countiesElevated snow accumulation — moderate lake-effect influence
Central Michigan25–30 psfLansing (Ingham), Saginaw, Midland countiesStandard interior Michigan snow loading
Southeast Michigan — Metro Detroit20–25 psfWayne, Oakland, Macomb, Washtenaw (Ann Arbor)Lowest Michigan snow loads — least lake-effect exposure
Snow load is Michigan's leading structural rejection reason. Plan sets that apply a flat statewide snow load value — common from out-of-state design firms — fail Michigan structural review for high-snowbelt counties like Houghton or Marquette where 60-80 psf is required versus 20-25 psf for Metro Detroit. Every Permit Design Michigan plan set applies the correct county-specific ground snow load per ASCE 7-22 and 2015 MRC residential structural provisions.
What's Included

Michigan Solar Permit Plan Set Contents

Every Michigan plan set references NEC 2023 for electrical, 2015 MRC for residential structural (2021 IBC for commercial), county-specific snow loads, and DTE Energy or Consumers Energy interconnection.

Sheet 01
Cover Sheet
NEC 2023 (Michigan Part 8) electrical citation. 2015 MRC residential structural citation for 1-2 family dwellings (2021 IBC for commercial/multi-family). C-46 Solar Contractor licence and/or Michigan Electrical Contractor licence number fields. County and AHJ. DTE Energy or Consumers Energy interconnection reference. Detroit BSEED notation where applicable.
Sheet 02
Site Plan
Scaled property diagram showing lot lines, DTE Energy or Consumers Energy or municipal utility meter location, IFC fire department access lanes, and conductor routing. County identified for snow load lookup. Detroit, Grand Rapids, Lansing, and Ann Arbor specific AHJ notations where applicable.
Sheet 03
Roof Layout
Panel array layout with roof pitch, attachment points, and rafter/truss documentation per 2015 MRC (1-2 family residential) or 2021 IBC (commercial/multi-family). County-specific ground snow load applied — from 20-25 psf (Metro Detroit) to 60-80 psf (Upper Peninsula lake-effect counties). Ice dam and snow guard notation for high-snowbelt counties.
Sheet 04
Single-Line Diagram
NEC 2023 Article 690 (Solar Photovoltaic Systems) compliant wiring diagram — DC source circuits, DC output circuits, AC output circuits. NEC 2023 Article 705 interconnected power production provisions. NEC 2023 §690.12 Rapid Shutdown shown with system boundary and labelling. Formatted for DTE Energy or Consumers Energy under-20kW simplified interconnection.
Sheet 05
Structural Calculations
Michigan-licensed PE-stamped structural engineering report. Residential 1-2 family: 2015 MRC provisions with ASCE 7-22 load combinations and county-specific ground snow load. Commercial/multi-family: 2021 IBC Chapter 16. Dead load, live load, snow load, and wind load documented. Rafter sizing and attachment point engineering.
Sheet 06
Rapid Shutdown
NEC 2023 §690.12 Rapid Shutdown compliance — system boundary, initiating device, array dimensions, and NEC 690.56(C) labelling. Required statewide under Michigan Part 8 Electrical Code. Local inspectors in Detroit (BSEED), Grand Rapids, and other AHJs verify RSD documentation during electrical inspection.
Sheet 07
Utility Interconnection Package
DTE Energy or Consumers Energy interconnection application formatted per PA 295/PA 342 simplified process for systems under 20 kW. Single-line diagram, equipment specifications, and site plan as required by MPSC interconnection rules. PA 235 of 2023 net metering eligibility (10% cap) documented. Submit alongside local building/electrical permits.
Sheet 08
Equipment Datasheets
UL-listed specification sheets for PV modules, inverters, racking, and optimisers. IEEE and UL standards compliance documentation for DTE Energy or Consumers Energy interconnection review. Michigan sales tax exemption (6%) and property tax exemption (100% on added value up to 150 kW) reference notations included.
Process

How Michigan Solar Permit Plan Sets Work

01

Submit Your Michigan Project

Send us the county and city — we determine the correct utility (DTE Energy vs Consumers Energy vs UPPCO vs municipal), the applicable structural code (2015 MRC residential vs 2021 IBC commercial), and the county-specific snow load zone. C-46 or electrical contractor licence details for the cover sheet.

02

We Build to NEC 2023 + Correct Structural Code

NEC 2023 (Michigan Part 8) electrical throughout. 2015 MRC for residential 1-2 family structural — the code currently enforced under the July 2025 court order — or 2021 IBC for commercial. Michigan-licensed PE-stamped calculations with correct county snow load. DTE Energy or Consumers Energy interconnection package.

03

Delivered in 24–48 Hours

Your complete 8-sheet Michigan plan set delivered in 24–48 hours. Submit local building permit, LARA or local electrical permit, and utility interconnection application simultaneously on Day 1. Detroit BSEED-specific formatting included where applicable. Free revisions until your Michigan AHJ approves.

First-Time Michigan Clients

Try Us on Your First Michigan Project. Free.

New to Permit Design? Submit your first Michigan residential solar project and receive the complete 8-sheet plan set free — NEC 2023 electrical, 2015 MRC structural, county-specific snow loads, and DTE Energy or Consumers Energy interconnection included.

Available for solar installers, EPCs, and roofing companies offering solar installation services. Not available for individual homeowners or end customers. One free residential plan set per company.

Claim Your Free MI Plan Set →
✓ NEC 2023 — Michigan Part 8
✓ 2015 MRC residential structural
✓ County-specific snow load engineering
✓ DTE Energy or Consumers Energy ISA
✓ Free revisions until AHJ approval
Michigan Solar Market — 2026

Michigan Solar by the Numbers

Jul 7, 2025
Court Order — 2021 MRC Blocked
A Michigan Court of Claims order issued July 7, 2025 temporarily blocks LARA from implementing the 2021 Michigan Residential Code for 1-2 family dwellings. The 2015 MRC remains the enforced standard while litigation continues. This is the single most important structural code fact for Michigan residential solar in 2026 — and the least understood by out-of-state design firms whose templates default to whichever edition was "most recently announced" rather than what is actually enforced.
10% Cap
Net Metering Cap — Up From 1%
PA 235 of 2023 raised Michigan's statewide net metering programme cap from 1% to 10% of utility peak load — a tenfold expansion. DTE Energy and Consumers Energy customers receive full retail-rate credits for excess solar generation under MPSC Distributed Generation rules. This expansion secures net metering availability for Michigan residential solar for the foreseeable future, removing a major adoption barrier that existed under the old 1% cap.
17-20¢
DTE + Consumers Rates per kWh — 2026
Michigan residents face some of the nation's fastest-growing electricity costs. DTE Energy and Consumers Energy implemented significant rate increases for 2026, with residential rates reaching 17-20¢/kWh in many service territories. Combined with full retail-rate net metering under the expanded 10% cap, every kWh of Michigan solar generation has become substantially more valuable — improving payback periods for systems installed in 2026.
100%
Property Tax Exemption — Up to 150 kW
Michigan provides a 100% property tax exemption on the added home value from solar energy systems up to 150 kW — applies automatically, no special filing required. Solar equipment is also exempt from Michigan's 6% state sales tax. Combined, these exemptions meaningfully reduce the total cost of Michigan solar ownership and apply to the vast majority of residential installations, which fall well under the 150 kW threshold.
$2.85–$3.50
Cost per Watt — 2026 Michigan Average
Michigan solar costs $2.85 to $3.50 per watt in 2026, putting a typical 8 kW system between $22,800 and $28,000 before incentives. The 30% federal ITC (Section 25D, expired December 31, 2025 for residential) reduced costs significantly for systems installed before the expiration. Michigan sits in the middle of the pack for solar irradiance — Detroit averages around 4.0 peak sun hours per day — but the combination of high electricity rates and strong state-level incentives makes Michigan solar a sound financial decision.
LBWL
$500/kW Municipal Rebate — Lansing
Lansing Board of Water and Light (LBWL) offers a $500 per kW solar rebate for LBWL customers, up to $2,000 for a 4 kW system — one of the strongest municipal utility solar incentives in Michigan. LBWL operates independently from DTE Energy and Consumers Energy with its own interconnection process. Combined with Michigan's property and sales tax exemptions, LBWL territory offers some of the best municipal-level solar economics in the state.
Michigan AHJ Rejections

Top 3 Reasons Michigan Solar Permits Get Rejected

Three permit rejection causes account for the majority of Michigan solar project delays across Detroit BSEED, Grand Rapids, and county building departments statewide. All three are avoidable.

01
Residential Structural Cites 2021 MRC — Currently Court-Blocked
The most Michigan-specific rejection cause of 2026. A solar plan set's structural sheet cites "2021 Michigan Residential Code" for a 1-2 family dwelling — but the July 7, 2025 Court of Claims order blocks LARA from implementing the 2021 MRC for residential structures. Building department plan reviewers compare the plan set's cited code against the 2015 MRC, which is what is currently enforced for 1-2 family dwellings. The mismatch triggers a correction notice requiring the structural sheet to be reissued under 2015 MRC provisions — adding 1-3 weeks per resubmission cycle.
2015 MRC (current) vs 2021 MRC (court-blocked Jul 7, 2025)
How we prevent it: Every Michigan residential (1-2 family) plan set cites 2015 MRC for structural provisions — the edition currently enforced under the court order. Commercial and multi-family plan sets correctly cite 2021 IBC, which is unaffected.
02
Incorrect County Snow Load — Lake-Effect Counties Underestimated
Michigan's lake-effect snow creates dramatic regional variation — from 20-25 psf in Metro Detroit to 60-80 psf in Upper Peninsula counties like Houghton and Keweenaw. Plan sets that apply a flat statewide snow load value, common from out-of-state design firms unfamiliar with Great Lakes lake-effect patterns, fail structural review for high-snowbelt counties. The structural calculations must be redone with the correct county-specific ground snow load — a significant delay if discovered late in plan review.
ASCE 7-22 county ground snow load · 2015 MRC residential
How we prevent it: Every Michigan plan set applies the correct county-specific ground snow load from ASCE 7-22 — verified against the project's specific county before structural calculations are finalised, not a flat statewide assumption.
03
Wrong Utility — DTE Energy vs Consumers Energy Territory Overlap
Several Michigan regions sit near the boundary between DTE Energy and Consumers Energy territories, particularly in mid-Michigan and parts of the Thumb region. Submitting a DTE Energy interconnection application for a Consumers Energy address — or vice versa — results in rejection at the utility review stage, restarting the 4-8 week interconnection timeline under PA 295/PA 342 simplified process rules. Municipal utility territories (LBWL, Holland BPW) also create address-specific exceptions within larger investor-owned utility regions.
MPSC PA 295/PA 342 · DTE Energy / Consumers Energy boundary
How we prevent it: We verify the serving utility by project address — not by county or city name — for every Michigan project, checking for municipal utility exceptions before building the interconnection package.
See all 8 common plan set rejection reasons → Residential Solar Permit Design →
FAQ

Michigan Solar Permit Design — Frequently Asked Questions

NEC 2023, adopted as Michigan's Part 8 Electrical Code rules, filed November 13, 2023 and effective March 12, 2024. NEC 2023 second printing with Michigan amendments. NEC Article 690 governs solar PV systems statewide and §690.12 Rapid Shutdown is mandatory. LARA Bureau of Construction Codes administers the Michigan Electrical Code; Detroit operates its own electrical inspection through BSEED.
A July 7, 2025 Michigan Court of Claims order temporarily blocks LARA from implementing the 2021 Michigan Residential Code (MRC) for 1-2 family dwellings while litigation continues. The 2015 MRC remains valid and currently enforced for residential structural provisions. Commercial and multi-family construction follows the 2021 IBC (effective April 9, 2025), unaffected by the residential court order. Most solar installations are on 1-2 family homes, so 2015 MRC applies to most Michigan residential solar plan sets.
LARA issues a C-46 Solar Contractor Licence for businesses specialising in solar PV and thermal installations, requiring passing law/business and trade-specific solar exams. Installers with a valid Michigan Electrical Contractor licence may also perform solar electrical work within that licence's scope. Owner-occupants of single-family dwellings may pull their own electrical permits without a contractor licence; commercial/multi-family requires a licensed electrical contractor of record.
DTE Energy serves Metro Detroit and Southeast Michigan. Consumers Energy serves West and Central Michigan including Grand Rapids, Lansing, and Traverse City. UPPCO serves portions of the Upper Peninsula. Municipal utilities including Lansing Board of Water and Light (LBWL) and Holland BPW also operate. All follow MPSC interconnection rules under PA 295 of 2008 and PA 342 of 2016. Systems under 20 kW qualify for simplified interconnection.
PA 235 of 2023 raised Michigan's net metering cap from 1% to 10% of utility peak load. DTE Energy and Consumers Energy customers receive full retail-rate credits for excess solar generation under MPSC Distributed Generation rules. Monthly credits roll over and offset future bills. The MPSC oversees the programme statewide.
Michigan snow loads vary dramatically by lake-effect exposure: Upper Peninsula Lake Superior counties (Keweenaw, Houghton): 60-80 psf. West Michigan Lake Michigan snowbelt (Muskegon, Traverse City): 30-50 psf. Northern Lower Peninsula: 30-40 psf. Central Michigan: 25-30 psf. Southeast Michigan/Metro Detroit: 20-25 psf. Every plan set must use the correct county-specific ground snow load per ASCE 7-22 and 2015 MRC.
Michigan provides a 100% property tax exemption on added home value from solar systems up to 150 kW — applies automatically. Solar equipment is exempt from Michigan's 6% state sales tax. Lansing Board of Water and Light additionally offers a $500/kW rebate up to $2,000 for LBWL customers.
Detroit (BSEED): 3-5 weeks. Grand Rapids: 2-3 weeks. Ann Arbor: 2-4 weeks. Lansing: 2-3 weeks. Most Michigan counties: 2-4 weeks. Rural counties: 1-3 weeks. DTE Energy and Consumers Energy interconnection: 4-8 weeks each. Submit building permit, electrical permit, and utility interconnection simultaneously.
Permit Design delivers Michigan solar permit plan sets within 24-48 hours. Every plan set references NEC 2023 electrical, 2015 MRC residential structural (2021 IBC commercial), county-specific snow loads, C-46/electrical contractor licence fields, and DTE Energy or Consumers Energy interconnection documentation. Detroit BSEED-specific formatting included. Free revisions until your Michigan AHJ approves.
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Reviewed & Verified By Licensed Professional Engineers (PE) across all 50 US states · 2,500+ AHJ-ready plan sets delivered monthly · 150+ solar installer partners worldwide Last reviewed: May 2026·About Permit Design →
NEC 2023 Part 82015 MRC ResidentialDTE + Consumers ReadyC-46 Licensed
Neighbouring States

Solar Permit Plan Sets — Midwest & Great Lakes States

🏙️IllinoisNEC 2020 🔔PennsylvaniaNEC 2020 🏔️ColoradoNEC 2020 🏙️New JerseyNEC 2020 🦞Massachusetts527 CMR

Michigan's Three-Code
Split — Solved.

NEC 2023 · 2015 MRC Residential · 2021 IBC Commercial
DTE Energy · Consumers Energy · C-46 Licensed · 24–48 Hours

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